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[How] Create amdgpu_current_pixelencoding debugfs entry. Usage: cat /sys/kernel/debug/dri/1/crtc-0/amdgpu_current_pixelencoding Signed-off-by: Rino Andre Johnsen --- Changes in v2: 1. Do not initialize dm_crtc_state to NULL. --- .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/dr= ivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index 27d5c6077630..4254d4a4b56b 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 @@ -1160,6 +1160,51 @@ static int amdgpu_current_colorspace_show(struct seq= _file *m, void *data) } DEFINE_SHOW_ATTRIBUTE(amdgpu_current_colorspace); =20 +/* + * Returns the current pixelencoding for the crtc. + * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_pixele= ncoding + */ +static int amdgpu_current_pixelencoding_show(struct seq_file *m, void *dat= a) +{ + struct drm_crtc *crtc =3D m->private; + struct drm_device *dev =3D crtc->dev; + struct dm_crtc_state *dm_crtc_state; + int res =3D -ENODEV; + + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state =3D=3D NULL) + goto unlock; + + dm_crtc_state =3D to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream =3D=3D NULL) + goto unlock; + + switch (dm_crtc_state->stream->timing.pixel_encoding) { + case PIXEL_ENCODING_RGB: + seq_puts(m, "RGB"); + break; + case PIXEL_ENCODING_YCBCR422: + seq_puts(m, "YCBCR422"); + break; + case PIXEL_ENCODING_YCBCR444: + seq_puts(m, "YCBCR444"); + break; + case PIXEL_ENCODING_YCBCR420: + seq_puts(m, "YCBCR420"); + break; + default: + goto unlock; + } + res =3D 0; + +unlock: + drm_modeset_unlock(&crtc->mutex); + mutex_unlock(&dev->mode_config.mutex); + + return res; +} +DEFINE_SHOW_ATTRIBUTE(amdgpu_current_pixelencoding); =20 /* * Example usage: @@ -3688,6 +3733,8 @@ void crtc_debugfs_init(struct drm_crtc *crtc) crtc, &amdgpu_current_bpc_fops); debugfs_create_file("amdgpu_current_colorspace", 0644, crtc->debugfs_entr= y, crtc, &amdgpu_current_colorspace_fops); + debugfs_create_file("amdgpu_current_pixelencoding", 0644, crtc->debugfs_e= ntry, + crtc, &amdgpu_current_pixelencoding_fops); } =20 /* --=20 2.45.1