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| author | Satyajit Roy <sroy14@alum.utk.edu> | 2026-08-30 03:51:58 +0000 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-09-10 12:55:08 -0400 |
| commit | bdcd0411d7d186225a52458fd42bb70d54ca917a (patch) | |
| tree | a16249de7a63aa86871cdf976ef1c9923e6434fd | |
| parent | 829157e762ed043e28ecb2e9f3c7d22b54e5989e (diff) | |
| download | linux-bdcd0411d7d186225a52458fd42bb70d54ca917a.tar.gz linux-bdcd0411d7d186225a52458fd42bb70d54ca917a.zip | |
drm/amd/display: Propagate HDMI RGB quantization selectability
DC uses dc_edid_caps.qs_bit when constructing the HDMI AVI InfoFrame
quantization-range field. Although DRM parses the sink capability into
drm_display_info, DM never copies it into the DC EDID capabilities. The
field therefore remains zero and the AVI quantization range stays at its
default value.
Copy rgb_quant_range_selectable for HDMI sinks and extend the existing
EDID-capability KUnit test to cover it.
Fixes: 6eb4c13a3845 ("drm/amd/display: Support "Broadcast RGB" drm property")
Signed-off-by: Satyajit Roy <sroy14@alum.utk.edu>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 892659399f64642e33072562a11ec1b2e7bd2263)
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index 249e0cd995c6..298de7b75ca8 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -200,6 +200,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps( edid_caps->edid_hdmi = connector->display_info.is_hdmi; if (edid_caps->edid_hdmi) { + edid_caps->qs_bit = connector->display_info.rgb_quant_range_selectable; populate_hdmi_info_from_connector(link->dc->config.enable_frl, &connector->display_info.hdmi, edid_caps); drm_dbg_driver(connector->dev, "%s: HDMI_FRL [%s] max_frl_rate %d\n", __func__, connector->name, edid_caps->max_frl_rate); if (edid_caps->frl_dsc_support) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c b/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c index 0c4517fb9d75..82e0c984693c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c @@ -358,12 +358,14 @@ static void dm_test_parse_edid_caps_hdmi_frl(struct kunit *test) /* Drive the HDMI/FRL branch */ connector->display_info.is_hdmi = true; + connector->display_info.rgb_quant_range_selectable = true; connector->display_info.hdmi.scdc.supported = true; connector->display_info.hdmi.max_lanes = 4; connector->display_info.hdmi.max_frl_rate_per_lane = 12; KUNIT_EXPECT_EQ(test, dm_helpers_parse_edid_caps(link, dc_edid, edid_caps), EDID_OK); KUNIT_EXPECT_TRUE(test, edid_caps->edid_hdmi); + KUNIT_EXPECT_EQ(test, edid_caps->qs_bit, 1); KUNIT_EXPECT_TRUE(test, edid_caps->scdc_present); /* max_lanes 4 + max_frl_rate_per_lane 12 -> rate index 6 */ KUNIT_EXPECT_EQ(test, edid_caps->max_frl_rate, 6); |