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drm/i915/dp: Pass DPCD device descriptor to intel_dp_get_dsc_sink_cap()

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Pass the DPCD sink/branch device descriptor along with the
is_branch/sink flag to intel_dp_get_dsc_sink_cap(). These will be used
by a follow up change to read out the branch device's DSC overall
throughput/line width capabilities and to detect a throughput/link-bpp
quirk.

Reported-and-tested-by: Swati Sharma <swati2.sharma@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20250930182450.563016-5-imre.deak@intel.com
This commit is contained in:
Imre Deak 2025-09-30 21:24:48 +03:00
parent b3797460fd
commit 8e696c8d2c
3 changed files with 16 additions and 3 deletions
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5
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -4180,7 +4180,9 @@ static void intel_dp_read_dsc_dpcd(struct drm_dp_aux *aux,
dsc_dpcd);
}
void intel_dp_get_dsc_sink_cap(u8 dpcd_rev, struct intel_connector *connector)
void intel_dp_get_dsc_sink_cap(u8 dpcd_rev,
const struct drm_dp_desc *desc, bool is_branch,
struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
@ -4231,6 +4233,7 @@ intel_dp_detect_dsc_caps(struct intel_dp *intel_dp, struct intel_connector *conn
connector);
else
intel_dp_get_dsc_sink_cap(intel_dp->dpcd[DP_DPCD_REV],
&intel_dp->desc, drm_dp_is_branch(intel_dp->dpcd),
connector);
}

5
drivers/gpu/drm/i915/display/intel_dp.h
View File

@ -12,6 +12,7 @@ enum intel_output_format;
enum pipe;
enum port;
struct drm_connector_state;
struct drm_dp_desc;
struct drm_dp_vsc_sdp;
struct drm_encoder;
struct drm_modeset_acquire_ctx;
@ -199,7 +200,9 @@ bool intel_dp_compute_config_limits(struct intel_dp *intel_dp,
bool dsc,
struct link_config_limits *limits);
void intel_dp_get_dsc_sink_cap(u8 dpcd_rev, struct intel_connector *connector);
void intel_dp_get_dsc_sink_cap(u8 dpcd_rev,
const struct drm_dp_desc *desc, bool is_branch,
struct intel_connector *connector);
bool intel_dp_has_gamut_metadata_dip(struct intel_encoder *encoder);
bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,

9
drivers/gpu/drm/i915/display/intel_dp_mst.c
View File

@ -1658,6 +1658,7 @@ intel_dp_mst_read_decompression_port_dsc_caps(struct intel_dp *intel_dp,
struct intel_connector *connector)
{
u8 dpcd_caps[DP_RECEIVER_CAP_SIZE];
struct drm_dp_desc desc;
if (!connector->dp.dsc_decompression_aux)
return;
@ -1665,7 +1666,13 @@ intel_dp_mst_read_decompression_port_dsc_caps(struct intel_dp *intel_dp,
if (drm_dp_read_dpcd_caps(connector->dp.dsc_decompression_aux, dpcd_caps) < 0)
return;
intel_dp_get_dsc_sink_cap(dpcd_caps[DP_DPCD_REV], connector);
if (drm_dp_read_desc(connector->dp.dsc_decompression_aux, &desc,
drm_dp_is_branch(dpcd_caps)) < 0)
return;
intel_dp_get_dsc_sink_cap(dpcd_caps[DP_DPCD_REV],
&desc, drm_dp_is_branch(dpcd_caps),
connector);
}
static bool detect_dsc_hblank_expansion_quirk(const struct intel_connector *connector)