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| author | Vandita Kulkarni <vandita.kulkarni@intel.com> | 2021-05-14 08:36:56 -0700 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2021-05-14 19:47:31 -0700 |
| commit | 831d5aa96c97514de44e871f564b563929bb3a57 (patch) | |
| tree | 288a08012068d4374a13566887ab26afe5875352 /drivers/gpu/drm/i915/display/intel_dp.c | |
| parent | 6ee9dea52a65cdc080599890cc66d9de51a78163 (diff) | |
| download | linux-831d5aa96c97514de44e871f564b563929bb3a57.tar.gz linux-831d5aa96c97514de44e871f564b563929bb3a57.tar.bz2 linux-831d5aa96c97514de44e871f564b563929bb3a57.zip | |
drm/i915/xelpd: Support DP1.4 compression BPPs
Support compression BPPs from bpc to uncompressed BPP -1.
So far we have 8,10,12 as valid compressed BPPS now the
support is extended.
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210514153711.2359617-5-matthew.d.roper@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 9f699d3a2a54..6f7bc9b7b206 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -109,6 +109,7 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp) } static void intel_dp_unset_edid(struct intel_dp *intel_dp); +static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc); /* update sink rates from dpcd */ static void intel_dp_set_sink_rates(struct intel_dp *intel_dp) @@ -494,7 +495,8 @@ small_joiner_ram_size_bits(struct drm_i915_private *i915) static u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915, u32 link_clock, u32 lane_count, u32 mode_clock, u32 mode_hdisplay, - bool bigjoiner) + bool bigjoiner, + u32 pipe_bpp) { u32 bits_per_pixel, max_bpp_small_joiner_ram; int i; @@ -541,12 +543,17 @@ static u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915, return 0; } - /* Find the nearest match in the array of known BPPs from VESA */ - for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp) - 1; i++) { - if (bits_per_pixel < valid_dsc_bpp[i + 1]) - break; + /* From XE_LPD onwards we support from bpc upto uncompressed bpp-1 BPPs */ + if (DISPLAY_VER(i915) >= 13) { + bits_per_pixel = min(bits_per_pixel, pipe_bpp - 1); + } else { + /* Find the nearest match in the array of known BPPs from VESA */ + for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp) - 1; i++) { + if (bits_per_pixel < valid_dsc_bpp[i + 1]) + break; + } + bits_per_pixel = valid_dsc_bpp[i]; } - bits_per_pixel = valid_dsc_bpp[i]; /* * Compressed BPP in U6.4 format so multiply by 16, for Gen 11, @@ -780,6 +787,12 @@ intel_dp_mode_valid(struct drm_connector *connector, */ if (DISPLAY_VER(dev_priv) >= 10 && drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) { + /* + * TBD pass the connector BPC, + * for now U8_MAX so that max BPC on that platform would be picked + */ + int pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, U8_MAX); + if (intel_dp_is_edp(intel_dp)) { dsc_max_output_bpp = drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4; @@ -793,7 +806,8 @@ intel_dp_mode_valid(struct drm_connector *connector, max_lanes, target_clock, mode->hdisplay, - bigjoiner) >> 4; + bigjoiner, + pipe_bpp) >> 4; dsc_slice_count = intel_dp_dsc_get_slice_count(intel_dp, target_clock, @@ -1240,7 +1254,8 @@ static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp, pipe_config->lane_count, adjusted_mode->crtc_clock, adjusted_mode->crtc_hdisplay, - pipe_config->bigjoiner); + pipe_config->bigjoiner, + pipe_bpp); dsc_dp_slice_count = intel_dp_dsc_get_slice_count(intel_dp, adjusted_mode->crtc_clock, |