Currently we check if the pipe_bpp selected is >= the
min DSC bpc/bpp requirement. We do not check if it is <= the max DSC
bpc/bpp requirement.
Add checks for max DSC BPC/BPP constraints while computing the
pipe_bpp when DSC is in use.
v2: Fix the commit message.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 34 +++++++++++++++++--------
1 file changed, 24 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f4870c9b0db6..67e8a9abe6ce 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1691,13 +1691,27 @@ u8 intel_dp_dsc_min_src_input_bpc(struct drm_i915_private *i915)
}
static
-bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915, int pipe_bpp)
+bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915,
+ struct drm_connector_state *conn_state,
+ struct link_config_limits *limits,
+ int pipe_bpp)
{
- return pipe_bpp >= intel_dp_dsc_min_src_input_bpc(i915) * 3;
+ u8 dsc_max_bpc, dsc_min_bpc, dsc_max_pipe_bpp, dsc_min_pipe_bpp;
+
+ dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(i915), conn_state->max_requested_bpc);
+ dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
+
+ dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->max_bpp);
+ dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->min_bpp);
+
+ return pipe_bpp >= dsc_min_pipe_bpp &&
+ pipe_bpp <= dsc_max_pipe_bpp;
}
static
-int intel_dp_force_dsc_pipe_bpp(struct intel_dp *intel_dp)
+int intel_dp_force_dsc_pipe_bpp(struct intel_dp *intel_dp,
+ struct drm_connector_state *conn_state,
+ struct link_config_limits *limits)
{
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
int forced_bpp;
@@ -1707,7 +1721,7 @@ int intel_dp_force_dsc_pipe_bpp(struct intel_dp *intel_dp)
forced_bpp = intel_dp->force_dsc_bpc * 3;
- if (is_dsc_pipe_bpp_sufficient(i915, forced_bpp)) {
+ if (is_dsc_pipe_bpp_sufficient(i915, conn_state, limits, forced_bpp)) {
drm_dbg_kms(&i915->drm, "Input DSC BPC forced to %d\n", intel_dp->force_dsc_bpc);
return forced_bpp;
}
@@ -1729,16 +1743,16 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
u16 output_bpp, dsc_max_compressed_bpp = 0;
int forced_bpp, pipe_bpp;
- forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp);
+ forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp, conn_state, limits);
if (forced_bpp) {
pipe_bpp = forced_bpp;
} else {
pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp, conn_state->max_requested_bpc);
- if (!is_dsc_pipe_bpp_sufficient(i915, pipe_bpp)) {
+ if (!is_dsc_pipe_bpp_sufficient(i915, conn_state, limits, pipe_bpp)) {
drm_dbg_kms(&i915->drm,
- "Computed BPC less than min supported by source for DSC\n");
+ "Computed BPC is not in DSC BPC limits\n");
return -EINVAL;
}
}
@@ -1780,7 +1794,7 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
int pipe_bpp, forced_bpp;
- forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp);
+ forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp, conn_state, limits);
if (forced_bpp) {
pipe_bpp = forced_bpp;
@@ -1788,9 +1802,9 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
/* For eDP use max bpp that can be supported with DSC. */
pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp,
conn_state->max_requested_bpc);
- if (!is_dsc_pipe_bpp_sufficient(i915, pipe_bpp)) {
+ if (!is_dsc_pipe_bpp_sufficient(i915, conn_state, limits, pipe_bpp)) {
drm_dbg_kms(&i915->drm,
- "Computed BPC less than min supported by source for DSC\n");
+ "Computed BPC is not in DSC BPC limits\n");
return -EINVAL;
}
}
--
2.40.1
