diff options
author | Imre Deak <imre.deak@intel.com> | 2023-09-21 22:51:51 +0300 |
---|---|---|
committer | Imre Deak <imre.deak@intel.com> | 2023-09-28 12:52:02 +0300 |
commit | 7d0f2f68b661e5fb4bc833d6ca22974134220e99 (patch) | |
tree | 089eddc7652af32aecb8cd84725c3a27195a6377 /drivers/gpu/drm/i915 | |
parent | 703c5994fe1a2bf45391c2a2a365bea541041b9a (diff) | |
download | linux-7d0f2f68b661e5fb4bc833d6ca22974134220e99.tar.xz |
drm/i915/dp: Skip computing a non-DSC link config if DSC is needed
Computing the non-DSC mode link config is redundant once it's determined
that DSC will be needed, so skip computing it. In a follow-up patch this
simplifies setting the link limits which are dependent on the DSC vs.
non-DSC mode.
While at it sanitize the debug print about the MST DSC fallback path,
making it similar to the SST DSC one.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230921195159.2646027-4-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 22 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 25 |
2 files changed, 33 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 9a38ea58b787..8c6ff2fa6365 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2247,7 +2247,8 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, struct intel_dp *intel_dp = enc_to_intel_dp(encoder); struct link_config_limits limits; bool joiner_needs_dsc = false; - int ret; + bool dsc_needed; + int ret = 0; intel_dp_compute_config_limits(intel_dp, pipe_config, respect_downstream_limits, &limits); @@ -2263,13 +2264,20 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, */ joiner_needs_dsc = DISPLAY_VER(i915) < 13 && pipe_config->bigjoiner_pipes; - /* - * Optimize for slow and wide for everything, because there are some - * eDP 1.3 and 1.4 panels don't work well with fast and narrow. - */ - ret = intel_dp_compute_link_config_wide(intel_dp, pipe_config, conn_state, &limits); + dsc_needed = joiner_needs_dsc || intel_dp->force_dsc_en; + + if (!dsc_needed) { + /* + * Optimize for slow and wide for everything, because there are some + * eDP 1.3 and 1.4 panels don't work well with fast and narrow. + */ + ret = intel_dp_compute_link_config_wide(intel_dp, pipe_config, + conn_state, &limits); + if (ret) + dsc_needed = true; + } - if (ret || joiner_needs_dsc || intel_dp->force_dsc_en) { + if (dsc_needed) { drm_dbg_kms(&i915->drm, "Try DSC (fallback=%s, joiner=%s, force=%s)\n", str_yes_no(ret), str_yes_no(joiner_needs_dsc), str_yes_no(intel_dp->force_dsc_en)); diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 137d5e6432fa..076c4346dd2d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -337,7 +337,8 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder, const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; struct link_config_limits limits; - int ret; + bool dsc_needed; + int ret = 0; if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) return -EINVAL; @@ -348,15 +349,25 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder, intel_dp_mst_compute_config_limits(intel_dp, pipe_config, &limits); - ret = intel_dp_mst_compute_link_config(encoder, pipe_config, - conn_state, &limits); + dsc_needed = intel_dp->force_dsc_en; - if (ret == -EDEADLK) - return ret; + if (!dsc_needed) { + ret = intel_dp_mst_compute_link_config(encoder, pipe_config, + conn_state, &limits); + + if (ret == -EDEADLK) + return ret; + + if (ret) + dsc_needed = true; + } /* enable compression if the mode doesn't fit available BW */ - drm_dbg_kms(&dev_priv->drm, "Force DSC en = %d\n", intel_dp->force_dsc_en); - if (ret || intel_dp->force_dsc_en) { + if (dsc_needed) { + drm_dbg_kms(&dev_priv->drm, "Try DSC (fallback=%s, force=%s)\n", + str_yes_no(ret), + str_yes_no(intel_dp->force_dsc_en)); + /* * FIXME: As bpc is hardcoded to 8, as mentioned above, * WARN and ignore the debug flag force_dsc_bpc for now. |