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@xxxxxxxxxxxxx>
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 4c68f76..a06d1da 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2541,7 +2541,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
goto out;
}
- crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
+ crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
out:
mutex_unlock(&dev->mode_config.mutex);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f879589..07a430c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4096,15 +4096,12 @@ void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
}
static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, uint32_t size)
+ u16 *blue, uint32_t start, uint32_t size)
{
+ int end = (start + size > 256) ? 256 : start + size, i;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- int i;
-
- if (size != 256)
- return;
- for (i = 0; i < 256; i++) {
+ for (i = start; i < end; i++) {
intel_crtc->lut_r[i] = red[i] >> 8;
intel_crtc->lut_g[i] = green[i] >> 8;
intel_crtc->lut_b[i] = blue[i] >> 8;
diff --git a/drivers/gpu/drm/nouveau/nv04_crtc.c b/drivers/gpu/drm/nouveau/nv04_crtc.c
index 1c20c08..88bb4ce 100644
--- a/drivers/gpu/drm/nouveau/nv04_crtc.c
+++ b/drivers/gpu/drm/nouveau/nv04_crtc.c
@@ -739,15 +739,13 @@ nv_crtc_gamma_load(struct drm_crtc *crtc)
}
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];
diff --git a/drivers/gpu/drm/nouveau/nv50_crtc.c b/drivers/gpu/drm/nouveau/nv50_crtc.c
index 5d11ea1..2f5f2f2 100644
--- a/drivers/gpu/drm/nouveau/nv50_crtc.c
+++ b/drivers/gpu/drm/nouveau/nv50_crtc.c
@@ -381,15 +381,12 @@ nv50_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
static void
nv50_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
- uint32_t size)
+ 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];
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 283beed..64e69fd 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -161,17 +161,13 @@ void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
}
static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, uint32_t size)
+ u16 *blue, uint32_t start, uint32_t size)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
- int i;
-
- if (size != 256) {
- return;
- }
+ int end = (start + size > 256) ? 256 : start + size, i;
/* userspace palettes are always correct as is */
- for (i = 0; i < 256; i++) {
+ for (i = start; i < end; i++) {
radeon_crtc->lut_r[i] = red[i] >> 6;
radeon_crtc->lut_g[i] = green[i] >> 6;
radeon_crtc->lut_b[i] = blue[i] >> 6;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
index cfaf690..2ff5cf7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
@@ -79,7 +79,7 @@ static void vmw_ldu_crtc_restore(struct drm_crtc *crtc)
static void vmw_ldu_crtc_gamma_set(struct drm_crtc *crtc,
u16 *r, u16 *g, u16 *b,
- uint32_t size)
+ uint32_t start, uint32_t size)
{
}
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 93a1a31..2f2c4b5 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -343,7 +343,7 @@ struct drm_crtc_funcs {
/* Set gamma on the CRTC */
void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
- uint32_t size);
+ uint32_t start, uint32_t size);
/* Object destroy routine */
void (*destroy)(struct drm_crtc *crtc);
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