This is a note to let you know that I've just added the patch titled
drm/amd/display: Program VSC SDP colorimetry for all DP sinks >= 1.4
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-program-vsc-sdp-colorimetry-for-all-dp-sinks-1.4.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9e61ef8d219877202d4ee51d0d2ad9072c99a262 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@xxxxxxx>
Date: Tue, 12 Mar 2024 11:55:52 -0400
Subject: drm/amd/display: Program VSC SDP colorimetry for all DP sinks >= 1.4
From: Harry Wentland <harry.wentland@xxxxxxx>
commit 9e61ef8d219877202d4ee51d0d2ad9072c99a262 upstream.
In order for display colorimetry to work correctly on DP displays
we need to send the VSC SDP packet. We should only do so for
panels with DPCD revision greater or equal to 1.4 as older
receivers might have problems with it.
Cc: stable@xxxxxxxxxxxxxxx
Cc: Joshua Ashton <joshua@xxxxxxxxx>
Cc: Xaver Hugl <xaver.hugl@xxxxxxxxx>
Cc: Melissa Wen <mwen@xxxxxxxxxx>
Cc: Agustin Gutierrez <Agustin.Gutierrez@xxxxxxx>
Reviewed-by: Agustin Gutierrez <agustin.gutierrez@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6257,7 +6257,9 @@ create_stream_for_sink(struct drm_connec
if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
mod_build_hf_vsif_infopacket(stream, &stream->vsp_infopacket);
- if (stream->link->psr_settings.psr_feature_enabled || stream->link->replay_settings.replay_feature_enabled) {
+ if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT ||
+ stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
+ stream->signal == SIGNAL_TYPE_EDP) {
//
// should decide stream support vsc sdp colorimetry capability
// before building vsc info packet
@@ -6267,7 +6269,8 @@ create_stream_for_sink(struct drm_connec
stream->use_vsc_sdp_for_colorimetry =
aconnector->dc_sink->is_vsc_sdp_colorimetry_supported;
} else {
- if (stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED)
+ if (stream->link->dpcd_caps.dpcd_rev.raw >= 0x14 &&
+ stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED)
stream->use_vsc_sdp_for_colorimetry = true;
}
if (stream->out_transfer_func->tf == TRANSFER_FUNCTION_GAMMA22)
Patches currently in stable-queue which might be from harry.wentland@xxxxxxx are
queue-6.8/drm-amd-display-program-vsc-sdp-colorimetry-for-all-dp-sinks-1.4.patch
queue-6.8/drm-amd-display-return-max-resolution-supported-by-dwb.patch
queue-6.8/drm-amd-display-set-vsc-sdp-colorimetry-same-way-for-mst-and-sst.patch
