From d4252eee1f7cde7f8b1673626d1b49498c1d4f77 Mon Sep 17 00:00:00 2001 From: Stylon Wang Date: Tue, 20 Aug 2019 14:48:37 -0400 Subject: [PATCH] drm/amd/display: Add debugfs entry to force YUV420 output [Why] Even if YUV420 is available for video mode, YUV444 is still automatically selected. This poses a problem for compliance tests. [How] Add a per-connector debugfs entry "force_yuv420_output" to force selection of YUV420 mode. Signed-off-by: Stylon Wang Reviewed-by: Nicholas Kazlauskas Acked-by: Leo Li Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 +++- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 1 + .../drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 31 ++++++++++++++++++++++ 3 files changed, 36 insertions(+), 1 deletion(-) 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 130da9f..b5ff7cf 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3312,7 +3312,7 @@ static void fill_stream_properties_from_drm_display_mode( { struct dc_crtc_timing *timing_out = &stream->timing; const struct drm_display_info *info = &connector->display_info; - + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); memset(timing_out, 0, sizeof(struct dc_crtc_timing)); timing_out->h_border_left = 0; @@ -3323,6 +3323,9 @@ static void fill_stream_properties_from_drm_display_mode( if (drm_mode_is_420_only(info, mode_in) && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420; + else if (drm_mode_is_420_also(info, mode_in) + && aconnector->force_yuv420_output) + timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420; else if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444) && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index c8c525a..c52ece3 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -287,6 +287,7 @@ struct amdgpu_dm_connector { uint32_t debugfs_dpcd_address; uint32_t debugfs_dpcd_size; #endif + bool force_yuv420_output; }; #define to_amdgpu_dm_connector(x) container_of(x, struct amdgpu_dm_connector, base) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index f3dfb28..e29c631 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -942,6 +942,33 @@ static const struct { {"aux_dpcd_data", &dp_dpcd_data_debugfs_fops} }; +/* + * Force YUV420 output if available from the given mode + */ +static int force_yuv420_output_set(void *data, u64 val) +{ + struct amdgpu_dm_connector *connector = data; + + connector->force_yuv420_output = (bool)val; + + return 0; +} + +/* + * Check if YUV420 is forced when available from the given mode + */ +static int force_yuv420_output_get(void *data, u64 *val) +{ + struct amdgpu_dm_connector *connector = data; + + *val = connector->force_yuv420_output; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(force_yuv420_output_fops, force_yuv420_output_get, + force_yuv420_output_set, "%llu\n"); + void connector_debugfs_init(struct amdgpu_dm_connector *connector) { int i; @@ -955,6 +982,10 @@ void connector_debugfs_init(struct amdgpu_dm_connector *connector) dp_debugfs_entries[i].fops); } } + + debugfs_create_file_unsafe("force_yuv420_output", 0644, dir, connector, + &force_yuv420_output_fops); + } /* -- 2.7.4