diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 1931 |
1 files changed, 0 insertions, 1931 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c deleted file mode 100644 index e6cd7b55c018..000000000000 --- a/drivers/gpu/drm/i915/intel_panel.c +++ /dev/null @@ -1,1931 +0,0 @@ -/* - * Copyright © 2006-2010 Intel Corporation - * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * Authors: - * Eric Anholt <eric@anholt.net> - * Dave Airlie <airlied@linux.ie> - * Jesse Barnes <jesse.barnes@intel.com> - * Chris Wilson <chris@chris-wilson.co.uk> - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/moduleparam.h> -#include <linux/pwm.h> -#include "intel_drv.h" - -#define CRC_PMIC_PWM_PERIOD_NS 21333 - -void -intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, - struct drm_display_mode *adjusted_mode) -{ - drm_mode_copy(adjusted_mode, fixed_mode); - - drm_mode_set_crtcinfo(adjusted_mode, 0); -} - -/** - * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID - * @dev_priv: i915 device instance - * @fixed_mode : panel native mode - * @connector: LVDS/eDP connector - * - * Return downclock_avail - * Find the reduced downclock for LVDS/eDP in EDID. - */ -struct drm_display_mode * -intel_find_panel_downclock(struct drm_i915_private *dev_priv, - struct drm_display_mode *fixed_mode, - struct drm_connector *connector) -{ - struct drm_display_mode *scan, *tmp_mode; - int temp_downclock; - - temp_downclock = fixed_mode->clock; - tmp_mode = NULL; - - list_for_each_entry(scan, &connector->probed_modes, head) { - /* - * If one mode has the same resolution with the fixed_panel - * mode while they have the different refresh rate, it means - * that the reduced downclock is found. In such - * case we can set the different FPx0/1 to dynamically select - * between low and high frequency. - */ - if (scan->hdisplay == fixed_mode->hdisplay && - scan->hsync_start == fixed_mode->hsync_start && - scan->hsync_end == fixed_mode->hsync_end && - scan->htotal == fixed_mode->htotal && - scan->vdisplay == fixed_mode->vdisplay && - scan->vsync_start == fixed_mode->vsync_start && - scan->vsync_end == fixed_mode->vsync_end && - scan->vtotal == fixed_mode->vtotal) { - if (scan->clock < temp_downclock) { - /* - * The downclock is already found. But we - * expect to find the lower downclock. - */ - temp_downclock = scan->clock; - tmp_mode = scan; - } - } - } - - if (temp_downclock < fixed_mode->clock) - return drm_mode_duplicate(&dev_priv->drm, tmp_mode); - else - return NULL; -} - -/* adjusted_mode has been preset to be the panel's fixed mode */ -void -intel_pch_panel_fitting(struct intel_crtc *intel_crtc, - struct intel_crtc_state *pipe_config, - int fitting_mode) -{ - const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; - int x = 0, y = 0, width = 0, height = 0; - - /* Native modes don't need fitting */ - if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w && - adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h && - pipe_config->output_format != INTEL_OUTPUT_FORMAT_YCBCR420) - goto done; - - switch (fitting_mode) { - case DRM_MODE_SCALE_CENTER: - width = pipe_config->pipe_src_w; - height = pipe_config->pipe_src_h; - x = (adjusted_mode->crtc_hdisplay - width + 1)/2; - y = (adjusted_mode->crtc_vdisplay - height + 1)/2; - break; - - case DRM_MODE_SCALE_ASPECT: - /* Scale but preserve the aspect ratio */ - { - u32 scaled_width = adjusted_mode->crtc_hdisplay - * pipe_config->pipe_src_h; - u32 scaled_height = pipe_config->pipe_src_w - * adjusted_mode->crtc_vdisplay; - if (scaled_width > scaled_height) { /* pillar */ - width = scaled_height / pipe_config->pipe_src_h; - if (width & 1) - width++; - x = (adjusted_mode->crtc_hdisplay - width + 1) / 2; - y = 0; - height = adjusted_mode->crtc_vdisplay; - } else if (scaled_width < scaled_height) { /* letter */ - height = scaled_width / pipe_config->pipe_src_w; - if (height & 1) - height++; - y = (adjusted_mode->crtc_vdisplay - height + 1) / 2; - x = 0; - width = adjusted_mode->crtc_hdisplay; - } else { - x = y = 0; - width = adjusted_mode->crtc_hdisplay; - height = adjusted_mode->crtc_vdisplay; - } - } - break; - - case DRM_MODE_SCALE_FULLSCREEN: - x = y = 0; - width = adjusted_mode->crtc_hdisplay; - height = adjusted_mode->crtc_vdisplay; - break; - - default: - WARN(1, "bad panel fit mode: %d\n", fitting_mode); - return; - } - -done: - pipe_config->pch_pfit.pos = (x << 16) | y; - pipe_config->pch_pfit.size = (width << 16) | height; - pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0; -} - -static void -centre_horizontally(struct drm_display_mode *adjusted_mode, - int width) -{ - u32 border, sync_pos, blank_width, sync_width; - - /* keep the hsync and hblank widths constant */ - sync_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start; - blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start; - sync_pos = (blank_width - sync_width + 1) / 2; - - border = (adjusted_mode->crtc_hdisplay - width + 1) / 2; - border += border & 1; /* make the border even */ - - adjusted_mode->crtc_hdisplay = width; - adjusted_mode->crtc_hblank_start = width + border; - adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_width; - - adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos; - adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width; -} - -static void -centre_vertically(struct drm_display_mode *adjusted_mode, - int height) -{ - u32 border, sync_pos, blank_width, sync_width; - - /* keep the vsync and vblank widths constant */ - sync_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start; - blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start; - sync_pos = (blank_width - sync_width + 1) / 2; - - border = (adjusted_mode->crtc_vdisplay - height + 1) / 2; - - adjusted_mode->crtc_vdisplay = height; - adjusted_mode->crtc_vblank_start = height + border; - adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_width; - - adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos; - adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width; -} - -static inline u32 panel_fitter_scaling(u32 source, u32 target) -{ - /* - * Floating point operation is not supported. So the FACTOR - * is defined, which can avoid the floating point computation - * when calculating the panel ratio. - */ -#define ACCURACY 12 -#define FACTOR (1 << ACCURACY) - u32 ratio = source * FACTOR / target; - return (FACTOR * ratio + FACTOR/2) / FACTOR; -} - -static void i965_scale_aspect(struct intel_crtc_state *pipe_config, - u32 *pfit_control) -{ - const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; - u32 scaled_width = adjusted_mode->crtc_hdisplay * - pipe_config->pipe_src_h; - u32 scaled_height = pipe_config->pipe_src_w * - adjusted_mode->crtc_vdisplay; - - /* 965+ is easy, it does everything in hw */ - if (scaled_width > scaled_height) - *pfit_control |= PFIT_ENABLE | - PFIT_SCALING_PILLAR; - else if (scaled_width < scaled_height) - *pfit_control |= PFIT_ENABLE | - PFIT_SCALING_LETTER; - else if (adjusted_mode->crtc_hdisplay != pipe_config->pipe_src_w) - *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; -} - -static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config, - u32 *pfit_control, u32 *pfit_pgm_ratios, - u32 *border) -{ - struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; - u32 scaled_width = adjusted_mode->crtc_hdisplay * - pipe_config->pipe_src_h; - u32 scaled_height = pipe_config->pipe_src_w * - adjusted_mode->crtc_vdisplay; - u32 bits; - - /* - * For earlier chips we have to calculate the scaling - * ratio by hand and program it into the - * PFIT_PGM_RATIO register - */ - if (scaled_width > scaled_height) { /* pillar */ - centre_horizontally(adjusted_mode, - scaled_height / - pipe_config->pipe_src_h); - - *border = LVDS_BORDER_ENABLE; - if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay) { - bits = panel_fitter_scaling(pipe_config->pipe_src_h, - adjusted_mode->crtc_vdisplay); - - *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | - bits << PFIT_VERT_SCALE_SHIFT); - *pfit_control |= (PFIT_ENABLE | - VERT_INTERP_BILINEAR | - HORIZ_INTERP_BILINEAR); - } - } else if (scaled_width < scaled_height) { /* letter */ - centre_vertically(adjusted_mode, - scaled_width / - pipe_config->pipe_src_w); - - *border = LVDS_BORDER_ENABLE; - if (pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) { - bits = panel_fitter_scaling(pipe_config->pipe_src_w, - adjusted_mode->crtc_hdisplay); - - *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | - bits << PFIT_VERT_SCALE_SHIFT); - *pfit_control |= (PFIT_ENABLE | - VERT_INTERP_BILINEAR | - HORIZ_INTERP_BILINEAR); - } - } else { - /* Aspects match, Let hw scale both directions */ - *pfit_control |= (PFIT_ENABLE | - VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | - VERT_INTERP_BILINEAR | - HORIZ_INTERP_BILINEAR); - } -} - -void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, - struct intel_crtc_state *pipe_config, - int fitting_mode) -{ - struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); - u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; - struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; - - /* Native modes don't need fitting */ - if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w && - adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h) - goto out; - - switch (fitting_mode) { - case DRM_MODE_SCALE_CENTER: - /* - * For centered modes, we have to calculate border widths & - * heights and modify the values programmed into the CRTC. - */ - centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); - centre_vertically(adjusted_mode, pipe_config->pipe_src_h); - border = LVDS_BORDER_ENABLE; - break; - case DRM_MODE_SCALE_ASPECT: - /* Scale but preserve the aspect ratio */ - if (INTEL_GEN(dev_priv) >= 4) - i965_scale_aspect(pipe_config, &pfit_control); - else - i9xx_scale_aspect(pipe_config, &pfit_control, - &pfit_pgm_ratios, &border); - break; - case DRM_MODE_SCALE_FULLSCREEN: - /* - * Full scaling, even if it changes the aspect ratio. - * Fortunately this is all done for us in hw. - */ - if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay || - pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) { - pfit_control |= PFIT_ENABLE; - if (INTEL_GEN(dev_priv) >= 4) - pfit_control |= PFIT_SCALING_AUTO; - else - pfit_control |= (VERT_AUTO_SCALE | - VERT_INTERP_BILINEAR | - HORIZ_AUTO_SCALE | - HORIZ_INTERP_BILINEAR); - } - break; - default: - WARN(1, "bad panel fit mode: %d\n", fitting_mode); - return; - } - - /* 965+ wants fuzzy fitting */ - /* FIXME: handle multiple panels by failing gracefully */ - if (INTEL_GEN(dev_priv) >= 4) - pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | - PFIT_FILTER_FUZZY); - -out: - if ((pfit_control & PFIT_ENABLE) == 0) { - pfit_control = 0; - pfit_pgm_ratios = 0; - } - - /* Make sure pre-965 set dither correctly for 18bpp panels. */ - if (INTEL_GEN(dev_priv) < 4 && pipe_config->pipe_bpp == 18) - pfit_control |= PANEL_8TO6_DITHER_ENABLE; - - pipe_config->gmch_pfit.control = pfit_control; - pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; - pipe_config->gmch_pfit.lvds_border_bits = border; -} - -/** - * scale - scale values from one range to another - * @source_val: value in range [@source_min..@source_max] - * @source_min: minimum legal value for @source_val - * @source_max: maximum legal value for @source_val - * @target_min: corresponding target value for @source_min - * @target_max: corresponding target value for @source_max - * - * Return @source_val in range [@source_min..@source_max] scaled to range - * [@target_min..@target_max]. - */ -static u32 scale(u32 source_val, - u32 source_min, u32 source_max, - u32 target_min, u32 target_max) -{ - u64 target_val; - - WARN_ON(source_min > source_max); - WARN_ON(target_min > target_max); - - /* defensive */ - source_val = clamp(source_val, source_min, source_max); - - /* avoid overflows */ - target_val = mul_u32_u32(source_val - source_min, - target_max - target_min); - target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); - target_val += target_min; - - return target_val; -} - -/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ -static inline u32 scale_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(user_level, 0, user_max, - panel->backlight.min, panel->backlight.max); -} - -/* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result - * to [hw_min..hw_max]. */ -static inline u32 clamp_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); - hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); - - return hw_level; -} - -/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ -static inline u32 scale_hw_to_user(struct intel_connector *connector, - u32 hw_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(hw_level, panel->backlight.min, panel->backlight.max, - 0, user_max); -} - -static u32 intel_panel_compute_brightness(struct intel_connector *connector, - u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - WARN_ON(panel->backlight.max == 0); - - if (i915_modparams.invert_brightness < 0) - return val; - - if (i915_modparams.invert_brightness > 0 || - dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { - return panel->backlight.max - val + panel->backlight.min; - } - - return val; -} - -static u32 lpt_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 pch_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 i9xx_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val; - - val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; - if (INTEL_GEN(dev_priv) < 4) - val >>= 1; - - if (panel->backlight.combination_mode) { - u8 lbpc; - - pci_read_config_byte(dev_priv->drm.pdev, LBPC, &lbpc); - val *= lbpc; - } - - return val; -} - -static u32 _vlv_get_backlight(struct drm_i915_private *dev_priv, enum pipe pipe) -{ - if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) - return 0; - - return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 vlv_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = intel_connector_get_pipe(connector); - - return _vlv_get_backlight(dev_priv, pipe); -} - -static u32 bxt_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - return I915_READ(BXT_BLC_PWM_DUTY(panel->backlight.controller)); -} - -static u32 pwm_get_backlight(struct intel_connector *connector) -{ - struct intel_panel *panel = &connector->panel; - int duty_ns; - - duty_ns = pwm_get_duty_cycle(panel->backlight.pwm); - return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS); -} - -static void lpt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; - I915_WRITE(BLC_PWM_PCH_CTL2, val | level); -} - -static void pch_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; - I915_WRITE(BLC_PWM_CPU_CTL, tmp | level); -} - -static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp, mask; - - WARN_ON(panel->backlight.max == 0); - - if (panel->backlight.combination_mode) { - u8 lbpc; - - lbpc = level * 0xfe / panel->backlight.max + 1; - level /= lbpc; - pci_write_config_byte(dev_priv->drm.pdev, LBPC, lbpc); - } - - if (IS_GEN4(dev_priv)) { - mask = BACKLIGHT_DUTY_CYCLE_MASK; - } else { - level <<= 1; - mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; - } - - tmp = I915_READ(BLC_PWM_CTL) & ~mask; - I915_WRITE(BLC_PWM_CTL, tmp | level); -} - -static void vlv_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 tmp; - - tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; - I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); -} - -static void bxt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - I915_WRITE(BXT_BLC_PWM_DUTY(panel->backlight.controller), level); -} - -static void pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; - int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100); - - pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); -} - -static void -intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); - - level = intel_panel_compute_brightness(connector, level); - panel->backlight.set(conn_state, level); -} - -/* set backlight brightness to level in range [0..max], assuming hw min is - * respected. - */ -void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - /* - * Lack of crtc may occur during driver init because - * connection_mutex isn't held across the entire backlight - * setup + modeset readout, and the BIOS can issue the - * requests at any time. - */ - if (!panel->backlight.present || !conn_state->crtc) - return; - - mutex_lock(&dev_priv->backlight_lock); - - WARN_ON(panel->backlight.max == 0); - - hw_level = clamp_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - /* - * Although we don't support or enable CPU PWM with LPT/SPT based - * systems, it may have been enabled prior to loading the - * driver. Disable to avoid warnings on LCPLL disable. - * - * This needs rework if we need to add support for CPU PWM on PCH split - * platforms. - */ - tmp = I915_READ(BLC_PWM_CPU_CTL2); - if (tmp & BLM_PWM_ENABLE) { - DRM_DEBUG_KMS("cpu backlight was enabled, disabling\n"); - I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); - } - - tmp = I915_READ(BLC_PWM_PCH_CTL1); - I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void pch_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - tmp = I915_READ(BLC_PWM_CPU_CTL2); - I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); - - tmp = I915_READ(BLC_PWM_PCH_CTL1); - I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - intel_panel_actually_set_backlight(old_conn_state, 0); -} - -static void i965_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); - u32 tmp; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - tmp = I915_READ(BLC_PWM_CTL2); - I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); -} - -static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; - u32 tmp; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe)); - I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); -} - -static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp, val; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); - - if (panel->backlight.controller == 1) { - val = I915_READ(UTIL_PIN_CTL); - val &= ~UTIL_PIN_ENABLE; - I915_WRITE(UTIL_PIN_CTL, val); - } -} - -static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp; - - intel_panel_actually_set_backlight(old_conn_state, 0); - - tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); -} - -static void pwm_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct intel_panel *panel = &connector->panel; - - /* Disable the backlight */ - intel_panel_actually_set_backlight(old_conn_state, 0); - usleep_range(2000, 3000); - pwm_disable(panel->backlight.pwm); -} - -void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - if (!panel->backlight.present) - return; - - /* - * Do not disable backlight on the vga_switcheroo path. When switching - * away from i915, the other client may depend on i915 to handle the - * backlight. This will leave the backlight on unnecessarily when - * another client is not activated. - */ - if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) { - DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); - return; - } - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_POWERDOWN; - panel->backlight.enabled = false; - panel->backlight.disable(old_conn_state); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pch_ctl1, pch_ctl2, schicken; - - pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - DRM_DEBUG_KMS("pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (HAS_PCH_LPT(dev_priv)) { - schicken = I915_READ(SOUTH_CHICKEN2); - if (panel->backlight.alternate_pwm_increment) - schicken |= LPT_PWM_GRANULARITY; - else - schicken &= ~LPT_PWM_GRANULARITY; - I915_WRITE(SOUTH_CHICKEN2, schicken); - } else { - schicken = I915_READ(SOUTH_CHICKEN1); - if (panel->backlight.alternate_pwm_increment) - schicken |= SPT_PWM_GRANULARITY; - else - schicken &= ~SPT_PWM_GRANULARITY; - I915_WRITE(SOUTH_CHICKEN1, schicken); - } - - pch_ctl2 = panel->backlight.max << 16; - I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - /* After LPT, override is the default. */ - if (HAS_PCH_LPT(dev_priv)) - pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; - - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); - POSTING_READ(BLC_PWM_PCH_CTL1); - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); -} - -static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; - u32 cpu_ctl2, pch_ctl1, pch_ctl2; - - cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); - if (cpu_ctl2 & BLM_PWM_ENABLE) { - DRM_DEBUG_KMS("cpu backlight already enabled\n"); - cpu_ctl2 &= ~BLM_PWM_ENABLE; - I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); - } - - pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - DRM_DEBUG_KMS("pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (cpu_transcoder == TRANSCODER_EDP) - cpu_ctl2 = BLM_TRANSCODER_EDP; - else - cpu_ctl2 = BLM_PIPE(cpu_transcoder); - I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); - POSTING_READ(BLC_PWM_CPU_CTL2); - I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); - - pch_ctl2 = panel->backlight.max << 16; - I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); - POSTING_READ(BLC_PWM_PCH_CTL1); - I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); -} - -static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, freq; - - ctl = I915_READ(BLC_PWM_CTL); - if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { - DRM_DEBUG_KMS("backlight already enabled\n"); - I915_WRITE(BLC_PWM_CTL, 0); - } - - freq = panel->backlight.max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 17; - if (panel->backlight.combination_mode) - ctl |= BLM_LEGACY_MODE; - if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) - ctl |= BLM_POLARITY_PNV; - - I915_WRITE(BLC_PWM_CTL, ctl); - POSTING_READ(BLC_PWM_CTL); - - /* XXX: combine this into above write? */ - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); - - /* - * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is - * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 - * that has backlight. - */ - if (IS_GEN2(dev_priv)) - I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); -} - -static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 ctl, ctl2, freq; - - ctl2 = I915_READ(BLC_PWM_CTL2); - if (ctl2 & BLM_PWM_ENABLE) { - DRM_DEBUG_KMS("backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - I915_WRITE(BLC_PWM_CTL2, ctl2); - } - - freq = panel->backlight.max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 16; - I915_WRITE(BLC_PWM_CTL, ctl); - - ctl2 = BLM_PIPE(pipe); - if (panel->backlight.combination_mode) - ctl2 |= BLM_COMBINATION_MODE; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - I915_WRITE(BLC_PWM_CTL2, ctl2); - POSTING_READ(BLC_PWM_CTL2); - I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); - - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); -} - -static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->base.crtc)->pipe; - u32 ctl, ctl2; - - ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); - if (ctl2 & BLM_PWM_ENABLE) { - DRM_DEBUG_KMS("backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); - } - - ctl = panel->backlight.max << 16; - I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl); - - /* XXX: combine this into above write? */ - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); - - ctl2 = 0; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); - POSTING_READ(VLV_BLC_PWM_CTL2(pipe)); - I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); -} - -static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->base.crtc)->pipe; - u32 pwm_ctl, val; - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = I915_READ(UTIL_PIN_CTL); - if (val & UTIL_PIN_ENABLE) { - DRM_DEBUG_KMS("util pin already enabled\n"); - val &= ~UTIL_PIN_ENABLE; - I915_WRITE(UTIL_PIN_CTL, val); - } - - val = 0; - if (panel->backlight.util_pin_active_low) - val |= UTIL_PIN_POLARITY; - I915_WRITE(UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) | - UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); - } - - pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - DRM_DEBUG_KMS("backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.max); - - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); - POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl; - - pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - DRM_DEBUG_KMS("backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.max); - - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); - POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void pwm_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - pwm_enable(panel->backlight.pwm); - intel_panel_actually_set_backlight(conn_state, panel->backlight.level); -} - -void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->base.crtc)->pipe; - - if (!panel->backlight.present) - return; - - DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); - - mutex_lock(&dev_priv->backlight_lock); - - WARN_ON(panel->backlight.max == 0); - - if (panel->backlight.level <= panel->backlight.min) { - panel->backlight.level = panel->backlight.max; - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - } - - panel->backlight.enable(crtc_state, conn_state); - panel->backlight.enabled = true; - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_UNBLANK; - - mutex_unlock(&dev_priv->backlight_lock); -} - -#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) -static u32 intel_panel_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val = 0; - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.enabled) { - val = panel->backlight.get(connector); - val = intel_panel_compute_brightness(connector, val); - } - - mutex_unlock(&dev_priv->backlight_lock); - - DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); - return val; -} - -/* set backlight brightness to level in range [0..max], scaling wrt hw min */ -static void intel_panel_set_backlight(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - if (!panel->backlight.present) - return; - - mutex_lock(&dev_priv->backlight_lock); - - WARN_ON(panel->backlight.max == 0); - - hw_level = scale_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static int intel_backlight_device_update_status(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct intel_panel *panel = &connector->panel; - struct drm_device *dev = connector->base.dev; - - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", - bd->props.brightness, bd->props.max_brightness); - intel_panel_set_backlight(connector->base.state, bd->props.brightness, - bd->props.max_brightness); - - /* - * Allow flipping bl_power as a sub-state of enabled. Sadly the - * backlight class device does not make it easy to to differentiate - * between callbacks for brightness and bl_power, so our backlight_power - * callback needs to take this into account. - */ - if (panel->backlight.enabled) { - if (panel->backlight.power) { - bool enable = bd->props.power == FB_BLANK_UNBLANK && - bd->props.brightness != 0; - panel->backlight.power(connector, enable); - } - } else { - bd->props.power = FB_BLANK_POWERDOWN; - } - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - return 0; -} - -static int intel_backlight_device_get_brightness(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct drm_device *dev = connector->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - u32 hw_level; - int ret; - - intel_runtime_pm_get(dev_priv); - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - - hw_level = intel_panel_get_backlight(connector); - ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness); - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - intel_runtime_pm_put(dev_priv); - - return ret; -} - -static const struct backlight_ops intel_backlight_device_ops = { - .update_status = intel_backlight_device_update_status, - .get_brightness = intel_backlight_device_get_brightness, -}; - -int intel_backlight_device_register(struct intel_connector *connector) -{ - struct intel_panel *panel = &connector->panel; - struct backlight_properties props; - - if (WARN_ON(panel->backlight.device)) - return -ENODEV; - - if (!panel->backlight.present) - return 0; - - WARN_ON(panel->backlight.max == 0); - - memset(&props, 0, sizeof(props)); - props.type = BACKLIGHT_RAW; - - /* - * Note: Everything should work even if the backlight device max - * presented to the userspace is arbitrarily chosen. - */ - props.max_brightness = panel->backlight.max; - props.brightness = scale_hw_to_user(connector, - panel->backlight.level, - props.max_brightness); - - if (panel->backlight.enabled) - props.power = FB_BLANK_UNBLANK; - else - props.power = FB_BLANK_POWERDOWN; - - /* - * Note: using the same name independent of the connector prevents - * registration of multiple backlight devices in the driver. - */ - panel->backlight.device = - backlight_device_register("intel_backlight", - connector->base.kdev, - connector, - &intel_backlight_device_ops, &props); - - if (IS_ERR(panel->backlight.device)) { - DRM_ERROR("Failed to register backlight: %ld\n", - PTR_ERR(panel->backlight.device)); - panel->backlight.device = NULL; - return -ENODEV; - } - - DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n", - connector->base.name); - - return 0; -} - -void intel_backlight_device_unregister(struct intel_connector *connector) -{ - struct intel_panel *panel = &connector->panel; - - if (panel->backlight.device) { - backlight_device_unregister(panel->backlight.device); - panel->backlight.device = NULL; - } -} -#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ - -/* - * CNP: PWM clock frequency is 19.2 MHz or 24 MHz. - * PWM increment = 1 - */ -static u32 cnp_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(dev_priv->rawclk_freq), pwm_freq_hz); -} - -/* - * BXT: PWM clock frequency = 19.2 MHz. - */ -static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); -} - -/* - * SPT: This value represents the period of the PWM stream in clock periods - * multiplied by 16 (default increment) or 128 (alternate increment selected in - * SCHICKEN_1 bit 0). PWM clock is 24 MHz. - */ -static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct intel_panel *panel = &connector->panel; - u32 mul; - - if (panel->backlight.alternate_pwm_increment) - mul = 128; - else - mul = 16; - - return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); -} - -/* - * LPT: This value represents the period of the PWM stream in clock periods - * multiplied by 128 (default increment) or 16 (alternate increment, selected in - * LPT SOUTH_CHICKEN2 register bit 5). - */ -static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 mul, clock; - - if (panel->backlight.alternate_pwm_increment) - mul = 16; - else - mul = 128; - - if (HAS_PCH_LPT_H(dev_priv)) - clock = MHz(135); /* LPT:H */ - else - clock = MHz(24); /* LPT:LP */ - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -/* - * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH - * display raw clocks multiplied by 128. - */ -static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(dev_priv->rawclk_freq), pwm_freq_hz * 128); -} - -/* - * Gen2: This field determines the number of time base events (display core - * clock frequency/32) in total for a complete cycle of modulated backlight - * control. - * - * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) - * divided by 32. - */ -static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_PINEVIEW(dev_priv)) - clock = KHz(dev_priv->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); -} - -/* - * Gen4: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] HRAW clocks) multiplied by 128. - * - */ -static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_G4X(dev_priv)) - clock = KHz(dev_priv->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); -} - -/* - * VLV: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks - * multiplied by 16. CHV uses a 19.2MHz S0IX clock. - */ -static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int mul, clock; - - if ((I915_READ(CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { - if (IS_CHERRYVIEW(dev_priv)) - clock = KHz(19200); - else - clock = MHz(25); - mul = 16; - } else { - clock = KHz(dev_priv->rawclk_freq); - mul = 128; - } - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -static u32 get_backlight_max_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; - u32 pwm; - - if (!panel->backlight.hz_to_pwm) { - DRM_DEBUG_KMS("backlight frequency conversion not supported\n"); - return 0; - } - - if (pwm_freq_hz) { - DRM_DEBUG_KMS("VBT defined backlight frequency %u Hz\n", - pwm_freq_hz); - } else { - pwm_freq_hz = 200; - DRM_DEBUG_KMS("default backlight frequency %u Hz\n", - pwm_freq_hz); - } - - pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz); - if (!pwm) { - DRM_DEBUG_KMS("backlight frequency conversion failed\n"); - return 0; - } - - return pwm; -} - -/* - * Note: The setup hooks can't assume pipe is set! - */ -static u32 get_backlight_min_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - int min; - - WARN_ON(panel->backlight.max == 0); - - /* - * XXX: If the vbt value is 255, it makes min equal to max, which leads - * to problems. There are such machines out there. Either our - * interpretation is wrong or the vbt has bogus data. Or both. Safeguard - * against this by letting the minimum be at most (arbitrarily chosen) - * 25% of the max. - */ - min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); - if (min != dev_priv->vbt.backlight.min_brightness) { - DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n", - dev_priv->vbt.backlight.min_brightness, min); - } - - /* vbt value is a coefficient in range [0..255] */ - return scale(min, 0, 255, 0, panel->backlight.max); -} - -static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pch_ctl1, pch_ctl2, val; - bool alt; - - if (HAS_PCH_LPT(dev_priv)) - alt = I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; - else - alt = I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; - panel->backlight.alternate_pwm_increment = alt; - - pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); - panel->backlight.max = pch_ctl2 >> 16; - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = lpt_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; - - return 0; -} - -static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; - - pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); - panel->backlight.max = pch_ctl2 >> 16; - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = pch_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); - panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && - (pch_ctl1 & BLM_PCH_PWM_ENABLE); - - return 0; -} - -static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, val; - - ctl = I915_READ(BLC_PWM_CTL); - - if (IS_GEN2(dev_priv) || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) - panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; - - if (IS_PINEVIEW(dev_priv)) - panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; - - panel->backlight.max = ctl >> 17; - - if (!panel->backlight.max) { - panel->backlight.max = get_backlight_max_vbt(connector); - panel->backlight.max >>= 1; - } - - if (!panel->backlight.max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.max *= 0xff; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = i9xx_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = val != 0; - - return 0; -} - -static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2, val; - - ctl2 = I915_READ(BLC_PWM_CTL2); - panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = I915_READ(BLC_PWM_CTL); - panel->backlight.max = ctl >> 16; - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.max *= 0xff; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = i9xx_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2, val; - - if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) - return -ENODEV; - - ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = I915_READ(VLV_BLC_PWM_CTL(pipe)); - panel->backlight.max = ctl >> 16; - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = _vlv_get_backlight(dev_priv, pipe); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int -bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl, val; - - panel->backlight.controller = dev_priv->vbt.backlight.controller; - - pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = I915_READ(UTIL_PIN_CTL); - panel->backlight.util_pin_active_low = - val & UTIL_PIN_POLARITY; - } - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.max = - I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = bxt_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int -cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl, val; - - /* - * CNP has the BXT implementation of backlight, but with only one - * controller. TODO: ICP has multiple controllers but we only use - * controller 0 for now. - */ - panel->backlight.controller = 0; - - pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.max = - I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); - - if (!panel->backlight.max) - return -ENODEV; - - panel->backlight.min = get_backlight_min_vbt(connector); - - val = bxt_get_backlight(connector); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int pwm_setup_backlight(struct intel_connector *connector, - enum pipe pipe) -{ - struct drm_device *dev = connector->base.dev; - struct intel_panel *panel = &connector->panel; - int retval; - - /* Get the PWM chip for backlight control */ - panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight"); - if (IS_ERR(panel->backlight.pwm)) { - DRM_ERROR("Failed to own the pwm chip\n"); - panel->backlight.pwm = NULL; - return -ENODEV; - } - - /* - * FIXME: pwm_apply_args() should be removed when switching to - * the atomic PWM API. - */ - pwm_apply_args(panel->backlight.pwm); - - retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS, - CRC_PMIC_PWM_PERIOD_NS); - if (retval < 0) { - DRM_ERROR("Failed to configure the pwm chip\n"); - pwm_put(panel->backlight.pwm); - panel->backlight.pwm = NULL; - return retval; - } - - panel->backlight.min = 0; /* 0% */ - panel->backlight.max = 100; /* 100% */ - panel->backlight.level = DIV_ROUND_UP( - pwm_get_duty_cycle(panel->backlight.pwm) * 100, - CRC_PMIC_PWM_PERIOD_NS); - panel->backlight.enabled = panel->backlight.level != 0; - - return 0; -} - -int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->dev); - struct intel_connector *intel_connector = to_intel_connector(connector); - struct intel_panel *panel = &intel_connector->panel; - int ret; - - if (!dev_priv->vbt.backlight.present) { - if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { - DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n"); - } else { - DRM_DEBUG_KMS("no backlight present per VBT\n"); - return 0; - } - } - - /* ensure intel_panel has been initialized first */ - if (WARN_ON(!panel->backlight.setup)) - return -ENODEV; - - /* set level and max in panel struct */ - mutex_lock(&dev_priv->backlight_lock); - ret = panel->backlight.setup(intel_connector, pipe); - mutex_unlock(&dev_priv->backlight_lock); - - if (ret) { - DRM_DEBUG_KMS("failed to setup backlight for connector %s\n", - connector->name); - return ret; - } - - panel->backlight.present = true; - - DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n", - connector->name, - enableddisabled(panel->backlight.enabled), - panel->backlight.level, panel->backlight.max); - - return 0; -} - -static void intel_panel_destroy_backlight(struct intel_panel *panel) -{ - /* dispose of the pwm */ - if (panel->backlight.pwm) - pwm_put(panel->backlight.pwm); - - panel->backlight.present = false; -} - -/* Set up chip specific backlight functions */ -static void -intel_panel_init_backlight_funcs(struct intel_panel *panel) -{ - struct intel_connector *connector = - container_of(panel, struct intel_connector, panel); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && - intel_dp_aux_init_backlight_funcs(connector) == 0) - return; - - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && - intel_dsi_dcs_init_backlight_funcs(connector) == 0) - return; - - if (IS_GEN9_LP(dev_priv)) { - panel->backlight.setup = bxt_setup_backlight; - panel->backlight.enable = bxt_enable_backlight; - panel->backlight.disable = bxt_disable_backlight; - panel->backlight.set = bxt_set_backlight; - panel->backlight.get = bxt_get_backlight; - panel->backlight.hz_to_pwm = bxt_hz_to_pwm; - } else if (HAS_PCH_CNP(dev_priv) || HAS_PCH_ICP(dev_priv)) { - panel->backlight.setup = cnp_setup_backlight; - panel->backlight.enable = cnp_enable_backlight; - panel->backlight.disable = cnp_disable_backlight; - panel->backlight.set = bxt_set_backlight; - panel->backlight.get = bxt_get_backlight; - panel->backlight.hz_to_pwm = cnp_hz_to_pwm; - } else if (HAS_PCH_LPT(dev_priv) || HAS_PCH_SPT(dev_priv) || - HAS_PCH_KBP(dev_priv)) { - panel->backlight.setup = lpt_setup_backlight; - panel->backlight.enable = lpt_enable_backlight; - panel->backlight.disable = lpt_disable_backlight; - panel->backlight.set = lpt_set_backlight; - panel->backlight.get = lpt_get_backlight; - if (HAS_PCH_LPT(dev_priv)) - panel->backlight.hz_to_pwm = lpt_hz_to_pwm; - else - panel->backlight.hz_to_pwm = spt_hz_to_pwm; - } else if (HAS_PCH_SPLIT(dev_priv)) { - panel->backlight.setup = pch_setup_backlight; - panel->backlight.enable = pch_enable_backlight; - panel->backlight.disable = pch_disable_backlight; - panel->backlight.set = pch_set_backlight; - panel->backlight.get = pch_get_backlight; - panel->backlight.hz_to_pwm = pch_hz_to_pwm; - } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { - panel->backlight.setup = pwm_setup_backlight; - panel->backlight.enable = pwm_enable_backlight; - panel->backlight.disable = pwm_disable_backlight; - panel->backlight.set = pwm_set_backlight; - panel->backlight.get = pwm_get_backlight; - } else { - panel->backlight.setup = vlv_setup_backlight; - panel->backlight.enable = vlv_enable_backlight; - panel->backlight.disable = vlv_disable_backlight; - panel->backlight.set = vlv_set_backlight; - panel->backlight.get = vlv_get_backlight; - panel->backlight.hz_to_pwm = vlv_hz_to_pwm; - } - } else if (IS_GEN4(dev_priv)) { - panel->backlight.setup = i965_setup_backlight; - panel->backlight.enable = i965_enable_backlight; - panel->backlight.disable = i965_disable_backlight; - panel->backlight.set = i9xx_set_backlight; - panel->backlight.get = i9xx_get_backlight; - panel->backlight.hz_to_pwm = i965_hz_to_pwm; - } else { - panel->backlight.setup = i9xx_setup_backlight; - panel->backlight.enable = i9xx_enable_backlight; - panel->backlight.disable = i9xx_disable_backlight; - panel->backlight.set = i9xx_set_backlight; - panel->backlight.get = i9xx_get_backlight; - panel->backlight.hz_to_pwm = i9xx_hz_to_pwm; - } -} - -int intel_panel_init(struct intel_panel *panel, - struct drm_display_mode *fixed_mode, - struct drm_display_mode *downclock_mode) -{ - intel_panel_init_backlight_funcs(panel); - - panel->fixed_mode = fixed_mode; - panel->downclock_mode = downclock_mode; - - return 0; -} - -void intel_panel_fini(struct intel_panel *panel) -{ - struct intel_connector *intel_connector = - container_of(panel, struct intel_connector, panel); - - intel_panel_destroy_backlight(panel); - - if (panel->fixed_mode) - drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); - - if (panel->downclock_mode) - drm_mode_destroy(intel_connector->base.dev, - panel->downclock_mode); -} |