drm: expand gamma_set
Expand the crtc_gamma_set function to accept a starting offset. The
reason for this is to eventually use this function for setcolreg from
drm_fb_helper.c. The fbdev colormap function can start at any offset in
the color map.
Signed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv04_crtc.c b/drivers/gpu/drm/nouveau/nv04_crtc.c
index 96f46c4..497df87 100644
--- a/drivers/gpu/drm/nouveau/nv04_crtc.c
+++ b/drivers/gpu/drm/nouveau/nv04_crtc.c
@@ -742,15 +742,13 @@
}
static void
-nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, uint32_t size)
+nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, uint32_t start,
+ uint32_t size)
{
+ int end = (start + size > 256) ? 256 : start + size, i;
struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
- int i;
- if (size != 256)
- return;
-
- for (i = 0; i < 256; i++) {
+ for (i = start; i < end; i++) {
nv_crtc->lut.r[i] = r[i];
nv_crtc->lut.g[i] = g[i];
nv_crtc->lut.b[i] = b[i];