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Message-ID: <20241124134102.3344326-65-sashal@kernel.org>
Date: Sun, 24 Nov 2024 08:38:43 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Fangzhi Zuo <Jerry.Zuo@....com>,
Wayne Lin <wayne.lin@....com>,
Zaeem Mohamed <zaeem.mohamed@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>,
harry.wentland@....com,
sunpeng.li@....com,
Rodrigo.Siqueira@....com,
christian.koenig@....com,
Xinhui.Pan@....com,
airlied@...il.com,
simona@...ll.ch,
hamza.mahfooz@....com,
alex.hung@....com,
chiahsuan.chung@....com,
sunil.khatri@....com,
aurabindo.pillai@....com,
mwen@...lia.com,
Wayne.Lin@....com,
linux@...blig.org,
nicholas.kazlauskas@....com,
etbitnun@....com,
dillon.varone@....com,
ryanseto@....com,
alvin.lee2@....com,
Ilya.Bakoulin@....com,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.11 65/87] drm/amd/display: Prune Invalid Modes For HDMI Output
From: Fangzhi Zuo <Jerry.Zuo@....com>
[ Upstream commit abdd2768d7630bc8ec3403aea24f4197bada3c1f ]
[Why]
1. HDMI does not have 6 bpc support. Having 6 bpc pass validation
does not comply with spec.
2. Validate 420 only for native HDMI, but not apply to pcon use
case.
3. Current mode validation log is not readable.
[how]
1. Cap 8 bpc for dp-hdmi converter.
2. Validate yuv420 for pcon use case as well,
if rgb/yuv444 8bpc cannot fit into pcon bw limitation of
the link from the converter to HDMI sink.
3. Add readable pixel_format and color_depth into debug log.
Reviewed-by: Wayne Lin <wayne.lin@....com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@....com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 19 ++++++---
.../gpu/drm/amd/display/dc/core/dc_debug.c | 40 +++++++++++++++++++
.../gpu/drm/amd/display/dc/core/dc_stream.c | 6 +--
.../gpu/drm/amd/display/dc/inc/core_status.h | 2 +
4 files changed, 59 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 90df415ece0bf..23b19821459f4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7295,10 +7295,15 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
const struct drm_connector_state *drm_state = dm_state ? &dm_state->base : NULL;
int requested_bpc = drm_state ? drm_state->max_requested_bpc : 8;
enum dc_status dc_result = DC_OK;
+ uint8_t bpc_limit = 6;
if (!dm_state)
return NULL;
+ if (aconnector->dc_link->connector_signal == SIGNAL_TYPE_HDMI_TYPE_A ||
+ aconnector->dc_link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER)
+ bpc_limit = 8;
+
do {
stream = create_stream_for_sink(connector, drm_mode,
dm_state, old_stream,
@@ -7319,11 +7324,12 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
dc_result = dm_validate_stream_and_context(adev->dm.dc, stream);
if (dc_result != DC_OK) {
- DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation with error %d (%s)\n",
+ DRM_DEBUG_KMS("Mode %dx%d (clk %d) pixel_encoding:%s color_depth:%s failed validation -- %s\n",
drm_mode->hdisplay,
drm_mode->vdisplay,
drm_mode->clock,
- dc_result,
+ dc_pixel_encoding_to_str(stream->timing.pixel_encoding),
+ dc_color_depth_to_str(stream->timing.display_color_depth),
dc_status_to_str(dc_result));
dc_stream_release(stream);
@@ -7331,10 +7337,13 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
requested_bpc -= 2; /* lower bpc to retry validation */
}
- } while (stream == NULL && requested_bpc >= 6);
+ } while (stream == NULL && requested_bpc >= bpc_limit);
- if (dc_result == DC_FAIL_ENC_VALIDATE && !aconnector->force_yuv420_output) {
- DRM_DEBUG_KMS("Retry forcing YCbCr420 encoding\n");
+ if ((dc_result == DC_FAIL_ENC_VALIDATE ||
+ dc_result == DC_EXCEED_DONGLE_CAP) &&
+ !aconnector->force_yuv420_output) {
+ DRM_DEBUG_KMS("%s:%d Retry forcing yuv420 encoding\n",
+ __func__, __LINE__);
aconnector->force_yuv420_output = true;
stream = create_validate_stream_for_sink(aconnector, drm_mode,
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_debug.c b/drivers/gpu/drm/amd/display/dc/core/dc_debug.c
index 801cdbc8117d9..e255c204b7e85 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_debug.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_debug.c
@@ -434,3 +434,43 @@ char *dc_status_to_str(enum dc_status status)
return "Unexpected status error";
}
+
+char *dc_pixel_encoding_to_str(enum dc_pixel_encoding pixel_encoding)
+{
+ switch (pixel_encoding) {
+ case PIXEL_ENCODING_RGB:
+ return "RGB";
+ case PIXEL_ENCODING_YCBCR422:
+ return "YUV422";
+ case PIXEL_ENCODING_YCBCR444:
+ return "YUV444";
+ case PIXEL_ENCODING_YCBCR420:
+ return "YUV420";
+ default:
+ return "Unknown";
+ }
+}
+
+char *dc_color_depth_to_str(enum dc_color_depth color_depth)
+{
+ switch (color_depth) {
+ case COLOR_DEPTH_666:
+ return "6-bpc";
+ case COLOR_DEPTH_888:
+ return "8-bpc";
+ case COLOR_DEPTH_101010:
+ return "10-bpc";
+ case COLOR_DEPTH_121212:
+ return "12-bpc";
+ case COLOR_DEPTH_141414:
+ return "14-bpc";
+ case COLOR_DEPTH_161616:
+ return "16-bpc";
+ case COLOR_DEPTH_999:
+ return "9-bpc";
+ case COLOR_DEPTH_111111:
+ return "11-bpc";
+ default:
+ return "Unknown";
+ }
+}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index 9a406d74c0dd7..3d93efdc1026d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -819,12 +819,12 @@ void dc_stream_log(const struct dc *dc, const struct dc_stream_state *stream)
stream->dst.height,
stream->output_color_space);
DC_LOG_DC(
- "\tpix_clk_khz: %d, h_total: %d, v_total: %d, pixelencoder:%d, displaycolorDepth:%d\n",
+ "\tpix_clk_khz: %d, h_total: %d, v_total: %d, pixel_encoding:%s, color_depth:%s\n",
stream->timing.pix_clk_100hz / 10,
stream->timing.h_total,
stream->timing.v_total,
- stream->timing.pixel_encoding,
- stream->timing.display_color_depth);
+ dc_pixel_encoding_to_str(stream->timing.pixel_encoding),
+ dc_color_depth_to_str(stream->timing.display_color_depth));
DC_LOG_DC(
"\tlink: %d\n",
stream->link->link_index);
diff --git a/drivers/gpu/drm/amd/display/dc/inc/core_status.h b/drivers/gpu/drm/amd/display/dc/inc/core_status.h
index fa5edd03d0043..b5afd8c3103db 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/core_status.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/core_status.h
@@ -60,5 +60,7 @@ enum dc_status {
};
char *dc_status_to_str(enum dc_status status);
+char *dc_pixel_encoding_to_str(enum dc_pixel_encoding pixel_encoding);
+char *dc_color_depth_to_str(enum dc_color_depth color_depth);
#endif /* _CORE_STATUS_H_ */
--
2.43.0
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