[PATCH 1/3] Skip xf86HandleColormaps() at color depth 30.

[Mario Kleiner <mario.kleiner.de-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

The hardware gamma luts get bypassed at color
depth 30 anyway, so skip their setup.

Also skip drmmode_crtc_gamma_set() for a screen
with depth 30.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
---
 src/drmmode_display.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 7ad3235..e5f9dbe 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -1275,6 +1275,10 @@ drmmode_crtc_gamma_set(xf86CrtcPtr crtc, uint16_t *red, uint16_t *green,
 	RADEONInfoPtr info = RADEONPTR(scrn);
 	int i;
 
+	/* Hw gamma lut's are bypassed at color depth 30 */
+	if (scrn->depth == 30)
+		return;
+
 	drmmode_crtc_gamma_do_set(crtc, red, green, blue, size);
 
 	/* Compute index of this CRTC into xf86_config->crtc */
@@ -2730,8 +2734,10 @@ Bool drmmode_setup_colormap(ScreenPtr pScreen, ScrnInfoPtr pScrn)
 		       "Initializing kms color map\n");
 	if (!miCreateDefColormap(pScreen))
 	    return FALSE;
-	/* all radeons support 10 bit CLUTs */
-	if (!xf86HandleColormaps(pScreen, 256, 10,
+
+	/* All radeons support 10 bit CLUTs. They get bypassed at depth 30. */
+	if (pScrn->depth != 30 &&
+	    !xf86HandleColormaps(pScreen, 256, 10,
 				 NULL, NULL,
 				 CMAP_PALETTED_TRUECOLOR
 #if 0 /* This option messes up text mode! (eich@suse.de) */
-- 
2.7.4

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