Am 21.05.24 um 07:11 schrieb Rino Andre Johnsen:
[Why]
For debugging and testing purposes.
[How]
Create amdgpu_current_pixelencoding debugfs entry.
Usage: cat /sys/kernel/debug/dri/1/crtc-0/amdgpu_current_pixelencoding
Why isn't that available as standard DRM CRTC property in either sysfs
or debugfs?
I think the format specifiers should already be available somewhere there.
Regards,
Christian.
Signed-off-by: Rino Andre Johnsen <rinoandrejohnsen@xxxxxxxxx>
---
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/drivers/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);
+/*
+ * Returns the current pixelencoding for the crtc.
+ * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_pixelencoding
+ */
+static int amdgpu_current_pixelencoding_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;
+ 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->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 = 0;
+
+unlock:
+ drm_modeset_unlock(&crtc->mutex);
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return res;
+}
+DEFINE_SHOW_ATTRIBUTE(amdgpu_current_pixelencoding);
/*
* 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_entry,
crtc, &amdgpu_current_colorspace_fops);
+ debugfs_create_file("amdgpu_current_pixelencoding", 0644, crtc->debugfs_entry,
+ crtc, &amdgpu_current_pixelencoding_fops);
}
/*
