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drm/amd/display: Add debugfs for testing output colorspace 

In order to IGT test colorspace we'll want to print
the currently enabled colorspace on a stream. We add
a new debugfs to do so, using the same scheme as
current bpc reporting.

This might also come in handy when debugging display
issues.

v4:
- Fix function doc comment
- Fix sRGB debug print

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Joshua Ashton <joshua@froggi.es>

Cc: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Sebastian Wick <sebastian.wick@redhat.com>
Cc: Vitaly.Prosyak@amd.com
Cc: Joshua Ashton <joshua@froggi.es>
Cc: Simon Ser <contact@emersion.fr>
Cc: Melissa Wen <mwen@igalia.com>
Cc: dri-devel@lists.freedesktop.org
Cc: amd-gfx@lists.freedesktop.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2022-11-29 17:24:52 -05:00 committed by Alex Deucher
parent bd49f19039
commit fd45b6540f
1 changed files with 57 additions and 0 deletions
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57
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View File

@ -906,6 +906,61 @@ unlock:
}
DEFINE_SHOW_ATTRIBUTE(amdgpu_current_bpc);
/*
* Returns the current colorspace for the crtc.
* Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_colorspace
*/
static int amdgpu_current_colorspace_show(struct seq_file *m, void *data)
{
struct drm_crtc *crtc = m->private;
struct drm_device *dev = crtc->dev;
struct dm_crtc_state *dm_crtc_state = NULL;
int res = -ENODEV;
mutex_lock(&dev->mode_config.mutex);
drm_modeset_lock(&crtc->mutex, NULL);
if (crtc->state == NULL)
goto unlock;
dm_crtc_state = to_dm_crtc_state(crtc->state);
if (dm_crtc_state->stream == NULL)
goto unlock;
switch (dm_crtc_state->stream->output_color_space) {
case COLOR_SPACE_SRGB:
seq_printf(m, "sRGB");
break;
case COLOR_SPACE_YCBCR601:
case COLOR_SPACE_YCBCR601_LIMITED:
seq_printf(m, "BT601_YCC");
break;
case COLOR_SPACE_YCBCR709:
case COLOR_SPACE_YCBCR709_LIMITED:
seq_printf(m, "BT709_YCC");
break;
case COLOR_SPACE_ADOBERGB:
seq_printf(m, "opRGB");
break;
case COLOR_SPACE_2020_RGB_FULLRANGE:
seq_printf(m, "BT2020_RGB");
break;
case COLOR_SPACE_2020_YCBCR:
seq_printf(m, "BT2020_YCC");
break;
default:
goto unlock;
}
res = 0;
unlock:
drm_modeset_unlock(&crtc->mutex);
mutex_unlock(&dev->mode_config.mutex);
return res;
}
DEFINE_SHOW_ATTRIBUTE(amdgpu_current_colorspace);
/*
* Example usage:
* Disable dsc passthrough, i.e.,: have dsc decoding at converver, not external RX
@ -3139,6 +3194,8 @@ void crtc_debugfs_init(struct drm_crtc *crtc)
#endif
debugfs_create_file("amdgpu_current_bpc", 0644, crtc->debugfs_entry,
crtc, &amdgpu_current_bpc_fops);
debugfs_create_file("amdgpu_current_colorspace", 0644, crtc->debugfs_entry,
crtc, &amdgpu_current_colorspace_fops);
}
/*