sna: Set initial gamma_size to 256 when loading from hardware

If the preallocated gamma ramp is not 256 elements in size we replace it
with a fresh array that is. When doing so, we need to specify the new
size.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 9821c596..92563008 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -6661,6 +6661,7 @@ static void crtc_init_gamma(xf86CrtcPtr crtc)
 			crtc->gamma_red = gamma;
 			crtc->gamma_green = gamma + 256;
 			crtc->gamma_blue = gamma + 2*256;
+			crtc->gamma_size = 256;
 		}
 	}
 }