1 files changed, 0 insertions, 198 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
deleted file mode 100644
index 228ca06d9f0b..000000000000
--- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
+++ /dev/null
@@ -1,198 +0,0 @@
-/*
- * Copyright © 2015 Intel Corporation
- *
- * 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.
- *
- */
-
-#include "intel_drv.h"
-
-static void set_aux_backlight_enable(struct intel_dp *intel_dp, bool enable)
-{
-	uint8_t reg_val = 0;
-
-	/* Early return when display use other mechanism to enable backlight. */
-	if (!(intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP))
-		return;
-
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER,
-			      &reg_val) < 0) {
-		DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n",
-			      DP_EDP_DISPLAY_CONTROL_REGISTER);
-		return;
-	}
-	if (enable)
-		reg_val |= DP_EDP_BACKLIGHT_ENABLE;
-	else
-		reg_val &= ~(DP_EDP_BACKLIGHT_ENABLE);
-
-	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER,
-			       reg_val) != 1) {
-		DRM_DEBUG_KMS("Failed to %s aux backlight\n",
-			      enable ? "enable" : "disable");
-	}
-}
-
-/*
- * Read the current backlight value from DPCD register(s) based
- * on if 8-bit(MSB) or 16-bit(MSB and LSB) values are supported
- */
-static uint32_t intel_dp_aux_get_backlight(struct intel_connector *connector)
-{
-	struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
-	uint8_t read_val[2] = { 0x0 };
-	uint16_t level = 0;
-
-	if (drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_BACKLIGHT_BRIGHTNESS_MSB,
-			     &read_val, sizeof(read_val)) < 0) {
-		DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n",
-			      DP_EDP_BACKLIGHT_BRIGHTNESS_MSB);
-		return 0;
-	}
-	level = read_val[0];
-	if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT)
-		level = (read_val[0] << 8 | read_val[1]);
-
-	return level;
-}
-
-/*
- * Sends the current backlight level over the aux channel, checking if its using
- * 8-bit or 16 bit value (MSB and LSB)
- */
-static void
-intel_dp_aux_set_backlight(const struct drm_connector_state *conn_state, u32 level)
-{
-	struct intel_connector *connector = to_intel_connector(conn_state->connector);
-	struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
-	uint8_t vals[2] = { 0x0 };
-
-	vals[0] = level;
-
-	/* Write the MSB and/or LSB */
-	if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT) {
-		vals[0] = (level & 0xFF00) >> 8;
-		vals[1] = (level & 0xFF);
-	}
-	if (drm_dp_dpcd_write(&intel_dp->aux, DP_EDP_BACKLIGHT_BRIGHTNESS_MSB,
-			      vals, sizeof(vals)) < 0) {
-		DRM_DEBUG_KMS("Failed to write aux backlight level\n");
-		return;
-	}
-}
-
-static void intel_dp_aux_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_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
-	uint8_t dpcd_buf = 0;
-	uint8_t edp_backlight_mode = 0;
-
-	if (drm_dp_dpcd_readb(&intel_dp->aux,
-			DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) != 1) {
-		DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n",
-			      DP_EDP_BACKLIGHT_MODE_SET_REGISTER);
-		return;
-	}
-
-	edp_backlight_mode = dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
-
-	switch (edp_backlight_mode) {
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PWM:
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET:
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT:
-		dpcd_buf &= ~DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
-		dpcd_buf |= DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD;
-		if (drm_dp_dpcd_writeb(&intel_dp->aux,
-			DP_EDP_BACKLIGHT_MODE_SET_REGISTER, dpcd_buf) < 0) {
-			DRM_DEBUG_KMS("Failed to write aux backlight mode\n");
-		}
-		break;
-
-	/* Do nothing when it is already DPCD mode */
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD:
-	default:
-		break;
-	}
-
-	set_aux_backlight_enable(intel_dp, true);
-	intel_dp_aux_set_backlight(conn_state, connector->panel.backlight.level);
-}
-
-static void intel_dp_aux_disable_backlight(const struct drm_connector_state *old_conn_state)
-{
-	set_aux_backlight_enable(enc_to_intel_dp(old_conn_state->best_encoder), false);
-}
-
-static int intel_dp_aux_setup_backlight(struct intel_connector *connector,
-					enum pipe pipe)
-{
-	struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
-	struct intel_panel *panel = &connector->panel;
-
-	if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT)
-		panel->backlight.max = 0xFFFF;
-	else
-		panel->backlight.max = 0xFF;
-
-	panel->backlight.min = 0;
-	panel->backlight.level = intel_dp_aux_get_backlight(connector);
-
-	panel->backlight.enabled = panel->backlight.level != 0;
-
-	return 0;
-}
-
-static bool
-intel_dp_aux_display_control_capable(struct intel_connector *connector)
-{
-	struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
-
-	/* Check the eDP Display control capabilities registers to determine if
-	 * the panel can support backlight control over the aux channel
-	 */
-	if (intel_dp->edp_dpcd[1] & DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP &&
-	    (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP) &&
-	    !(intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP)) {
-		DRM_DEBUG_KMS("AUX Backlight Control Supported!\n");
-		return true;
-	}
-	return false;
-}
-
-int intel_dp_aux_init_backlight_funcs(struct intel_connector *intel_connector)
-{
-	struct intel_panel *panel = &intel_connector->panel;
-
-	if (!i915.enable_dpcd_backlight)
-		return -ENODEV;
-
-	if (!intel_dp_aux_display_control_capable(intel_connector))
-		return -ENODEV;
-
-	panel->backlight.setup = intel_dp_aux_setup_backlight;
-	panel->backlight.enable = intel_dp_aux_enable_backlight;
-	panel->backlight.disable = intel_dp_aux_disable_backlight;
-	panel->backlight.set = intel_dp_aux_set_backlight;
-	panel->backlight.get = intel_dp_aux_get_backlight;
-
-	return 0;
-}