diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 85 |
1 files changed, 63 insertions, 22 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 640c43bf62d4..7976fec88606 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -27,6 +27,8 @@ #include <linux/export.h> #include <linux/i2c.h> +#include <linux/log2.h> +#include <linux/math.h> #include <linux/notifier.h> #include <linux/seq_buf.h> #include <linux/slab.h> @@ -34,7 +36,6 @@ #include <linux/string_helpers.h> #include <linux/timekeeping.h> #include <linux/types.h> - #include <asm/byteorder.h> #include <drm/display/drm_dp_helper.h> @@ -49,8 +50,6 @@ #include <drm/drm_probe_helper.h> #include "g4x_dp.h" -#include "i915_irq.h" -#include "i915_reg.h" #include "i915_utils.h" #include "intel_alpm.h" #include "intel_atomic.h" @@ -64,6 +63,7 @@ #include "intel_ddi.h" #include "intel_de.h" #include "intel_display_driver.h" +#include "intel_display_regs.h" #include "intel_display_rpm.h" #include "intel_display_types.h" #include "intel_dp.h" @@ -847,7 +847,7 @@ small_joiner_ram_size_bits(struct intel_display *display) return 6144 * 8; } -u32 intel_dp_dsc_nearest_valid_bpp(struct intel_display *display, u32 bpp, u32 pipe_bpp) +static u32 intel_dp_dsc_nearest_valid_bpp(struct intel_display *display, u32 bpp, u32 pipe_bpp) { u32 bits_per_pixel = bpp; int i; @@ -939,6 +939,7 @@ static u32 ultrajoiner_ram_max_bpp(u32 mode_hdisplay) return ultrajoiner_ram_bits() / mode_hdisplay; } +/* TODO: return a bpp_x16 value */ static u32 get_max_compressed_bpp_with_joiner(struct intel_display *display, u32 mode_clock, u32 mode_hdisplay, @@ -955,6 +956,7 @@ u32 get_max_compressed_bpp_with_joiner(struct intel_display *display, return max_bpp; } +/* TODO: return a bpp_x16 value */ u16 intel_dp_dsc_get_max_compressed_bpp(struct intel_display *display, u32 link_clock, u32 lane_count, u32 mode_clock, u32 mode_hdisplay, @@ -1195,7 +1197,7 @@ intel_dp_output_format(struct intel_connector *connector, int intel_dp_min_bpp(enum intel_output_format output_format) { if (output_format == INTEL_OUTPUT_FORMAT_RGB) - return 6 * 3; + return intel_display_min_pipe_bpp(); else return 8 * 3; } @@ -1604,6 +1606,12 @@ int intel_dp_rate_select(struct intel_dp *intel_dp, int rate) void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock, u8 *link_bw, u8 *rate_select) { + struct intel_display *display = to_intel_display(intel_dp); + + /* FIXME g4x can't generate an exact 2.7GHz with the 96MHz non-SSC refclk */ + if (display->platform.g4x && port_clock == 268800) + port_clock = 270000; + /* eDP 1.4 rate select method. */ if (intel_dp->use_rate_select) { *link_bw = 0; @@ -2067,7 +2075,7 @@ int intel_dp_dsc_sink_max_compressed_bpp(const struct intel_connector *connector pipe_config, bpc) >> 4; } -static int dsc_src_min_compressed_bpp(void) +int intel_dp_dsc_min_src_compressed_bpp(void) { /* Min Compressed bpp supported by source is 8 */ return 8; @@ -2099,7 +2107,7 @@ static int dsc_src_max_compressed_bpp(struct intel_dp *intel_dp) /* * Note: for pre-13 display you still need to check the validity of each step. */ -static int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) +int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) { struct intel_display *display = to_intel_display(connector); u8 incr = drm_dp_dsc_sink_bpp_incr(connector->dp.dsc_dpcd); @@ -2107,12 +2115,19 @@ static int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) if (DISPLAY_VER(display) < 14 || !incr) return fxp_q4_from_int(1); + if (connector->mst.dp && + !connector->link.force_bpp_x16 && !connector->mst.dp->force_dsc_fractional_bpp_en) + return fxp_q4_from_int(1); + /* fxp q4 */ return fxp_q4_from_int(1) / incr; } -/* Note: This is not universally usable! */ -static bool intel_dp_dsc_valid_bpp(struct intel_dp *intel_dp, int bpp_x16) +/* + * Note: for bpp_x16 to be valid it must be also within the source/sink's + * min..max bpp capability range. + */ +bool intel_dp_dsc_valid_compressed_bpp(struct intel_dp *intel_dp, int bpp_x16) { struct intel_display *display = to_intel_display(intel_dp); int i; @@ -2150,24 +2165,16 @@ static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp, const struct intel_connector *connector = to_intel_connector(conn_state->connector); const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; int output_bpp; - int dsc_min_bpp; - int dsc_max_bpp; int min_bpp_x16, max_bpp_x16, bpp_step_x16; int dsc_joiner_max_bpp; int num_joined_pipes = intel_crtc_num_joined_pipes(pipe_config); int bpp_x16; int ret; - dsc_min_bpp = fxp_q4_to_int_roundup(limits->link.min_bpp_x16); - dsc_joiner_max_bpp = get_max_compressed_bpp_with_joiner(display, adjusted_mode->clock, adjusted_mode->hdisplay, num_joined_pipes); - dsc_max_bpp = min(dsc_joiner_max_bpp, fxp_q4_to_int(limits->link.max_bpp_x16)); - - /* FIXME: remove the round trip via integers */ - min_bpp_x16 = fxp_q4_from_int(dsc_min_bpp); - max_bpp_x16 = fxp_q4_from_int(dsc_max_bpp); + max_bpp_x16 = min(fxp_q4_from_int(dsc_joiner_max_bpp), limits->link.max_bpp_x16); bpp_step_x16 = intel_dp_dsc_bpp_step_x16(connector); @@ -2175,8 +2182,12 @@ static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp, output_bpp = intel_dp_output_bpp(pipe_config->output_format, pipe_bpp); max_bpp_x16 = min(max_bpp_x16, fxp_q4_from_int(output_bpp) - bpp_step_x16); + drm_WARN_ON(display->drm, !is_power_of_2(bpp_step_x16)); + min_bpp_x16 = round_up(limits->link.min_bpp_x16, bpp_step_x16); + max_bpp_x16 = round_down(max_bpp_x16, bpp_step_x16); + for (bpp_x16 = max_bpp_x16; bpp_x16 >= min_bpp_x16; bpp_x16 -= bpp_step_x16) { - if (!intel_dp_dsc_valid_bpp(intel_dp, bpp_x16)) + if (!intel_dp_dsc_valid_compressed_bpp(intel_dp, bpp_x16)) continue; ret = dsc_compute_link_config(intel_dp, @@ -2479,7 +2490,7 @@ intel_dp_compute_config_link_bpp_limits(struct intel_dp *intel_dp, int dsc_src_min_bpp, dsc_sink_min_bpp, dsc_min_bpp; int dsc_src_max_bpp, dsc_sink_max_bpp, dsc_max_bpp; - dsc_src_min_bpp = dsc_src_min_compressed_bpp(); + dsc_src_min_bpp = intel_dp_dsc_min_src_compressed_bpp(); dsc_sink_min_bpp = intel_dp_dsc_sink_min_compressed_bpp(crtc_state); dsc_min_bpp = max(dsc_src_min_bpp, dsc_sink_min_bpp); limits->link.min_bpp_x16 = fxp_q4_from_int(dsc_min_bpp); @@ -3721,6 +3732,9 @@ static void intel_dp_get_pcon_dsc_cap(struct intel_dp *intel_dp) memset(intel_dp->pcon_dsc_dpcd, 0, sizeof(intel_dp->pcon_dsc_dpcd)); + if (!drm_dp_is_branch(intel_dp->dpcd)) + return; + if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER, intel_dp->pcon_dsc_dpcd, sizeof(intel_dp->pcon_dsc_dpcd)) < 0) @@ -5785,6 +5799,28 @@ intel_dp_detect_sdp_caps(struct intel_dp *intel_dp) drm_dp_as_sdp_supported(&intel_dp->aux, intel_dp->dpcd); } +static bool intel_dp_needs_dpcd_probe(struct intel_dp *intel_dp, bool force_on_external) +{ + struct intel_connector *connector = intel_dp->attached_connector; + + if (intel_dp_is_edp(intel_dp)) + return false; + + if (force_on_external) + return true; + + if (intel_dp->is_mst) + return false; + + return drm_edid_has_quirk(&connector->base, DRM_EDID_QUIRK_DP_DPCD_PROBE); +} + +void intel_dp_dpcd_set_probe(struct intel_dp *intel_dp, bool force_on_external) +{ + drm_dp_dpcd_set_probe(&intel_dp->aux, + intel_dp_needs_dpcd_probe(intel_dp, force_on_external)); +} + static int intel_dp_detect(struct drm_connector *_connector, struct drm_modeset_acquire_ctx *ctx, @@ -5913,6 +5949,8 @@ out_unset_edid: if (status != connector_status_connected && !intel_dp->is_mst) intel_dp_unset_edid(intel_dp); + intel_dp_dpcd_set_probe(intel_dp, false); + if (!intel_dp_is_edp(intel_dp)) drm_dp_set_subconnector_property(&connector->base, status, @@ -5943,6 +5981,8 @@ intel_dp_force(struct drm_connector *_connector) return; intel_dp_set_edid(intel_dp); + + intel_dp_dpcd_set_probe(intel_dp, false); } static int intel_dp_get_modes(struct drm_connector *_connector) @@ -6315,10 +6355,11 @@ intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd) * complete the DP tunnel BW request for the latter connector/encoder * waiting for this encoder's DPRX read, perform a dummy read here. */ - if (long_hpd) + if (long_hpd) { + intel_dp_dpcd_set_probe(intel_dp, true); + intel_dp_read_dprx_caps(intel_dp, dpcd); - if (long_hpd) { intel_dp->reset_link_params = true; intel_dp_invalidate_source_oui(intel_dp); |