Commit fd45b654 authored by Harry Wentland's avatar Harry Wentland Committed by Alex Deucher
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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: default avatarHarry Wentland <harry.wentland@amd.com>
Reviewed-by: default avatarJoshua 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: default avatarAlex Deucher <alexander.deucher@amd.com>
parent bd49f190

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

+57 −0
Original line number Diff line number Diff line
@@ -906,6 +906,61 @@ static int amdgpu_current_bpc_show(struct seq_file *m, void *data) 
}

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);

}



/*