DSC is available on the display emulator, but not set in DPCD.
Override the entries to allow bigjoiner testing.
Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
---
drivers/gpu/drm/drm_dp_helper.c | 4 ++--
include/drm/drm_dp_helper.h | 1 +
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index f373798d82f6..a990073c7adf 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1374,7 +1374,7 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8
dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
if (slice_cap1 & DP_DSC_4_PER_DP_DSC_SINK)
return 4;
if (slice_cap1 & DP_DSC_2_PER_DP_DSC_SINK)
- return 2;
+ return 4;
if (slice_cap1 & DP_DSC_1_PER_DP_DSC_SINK)
return 1;
} else {
@@ -1398,7 +1398,7 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8
dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
if (slice_cap1 & DP_DSC_4_PER_DP_DSC_SINK)
return 4;
if (slice_cap1 & DP_DSC_2_PER_DP_DSC_SINK)
- return 2;
+ return 4;
if (slice_cap1 & DP_DSC_1_PER_DP_DSC_SINK)
return 1;
}
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index ed1a985745ba..065b65350fce 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1222,6 +1222,7 @@ int drm_dp_dsc_sink_supported_input_bpcs(const u8
dsc_dpc[DP_DSC_RECEIVER_CAP_SI
static inline bool
drm_dp_sink_supports_dsc(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
{
+ return dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT];
return dsc_dpcd[DP_DSC_SUPPORT - DP_DSC_SUPPORT] &
DP_DSC_DECOMPRESSION_IS_SUPPORTED;
}
--
2.23.0
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