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drm/i915: Fix FEC pipe A vs. DDI A mixup

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[ Upstream commit 126f94e87e7960ef7ae58180e39c19cc9dcbbf7f ]

On pre-TGL FEC is a port level feature, not a transcoder
level feature, and it's DDI A which doesn't have it, not
trancoder A. Check for the correct thing when determining
whether FEC is supported or not.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230502143906.2401-5-ville.syrjala@linux.intel.com
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Stable-dep-of: 99f855082f22 ("drm/i915/mst: Reject FEC+MST on ICL")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ville Syrjälä 2023-05-02 17:38:59 +03:00 committed by Greg Kroah-Hartman
parent 488d4cbc6f
commit 6b625d2743
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/intel_dp.c
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@ -1310,13 +1310,13 @@ bool intel_dp_has_hdmi_sink(struct intel_dp *intel_dp)
static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
const struct intel_crtc_state *pipe_config)
{
struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
/* On TGL, FEC is supported on all Pipes */
if (DISPLAY_VER(dev_priv) >= 12)
return true;
if (DISPLAY_VER(dev_priv) == 11 && pipe_config->cpu_transcoder != TRANSCODER_A)
if (DISPLAY_VER(dev_priv) == 11 && encoder->port != PORT_A)
return true;
return false;