[PATCH v2] drm/core: Change declaration for gamma_set.
Sinclair Yeh
syeh at vmware.com
Tue Jun 7 22:23:13 UTC 2016
Acked-by: Sinclair Yeh <syeh at vmware.com>
On Tue, Jun 07, 2016 at 12:49:30PM +0200, Maarten Lankhorst wrote:
> Change return value to int to propagate errors from gamma_set,
> and remove start parameter. Updates always use the full size,
> and some drivers even ignore the start parameter altogether.
>
> This is needed for atomic drivers, where an atomic commit can
> fail with -EINTR or -ENOMEM and should be restarted.
>
> Changes since v1:
> - Fix compiler warning. (Emil)
> - Fix commit message (Daniel)
>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Acked-by: Alex Deucher <alexander.deucher at amd.com>
> Cc: Christian König <christian.koenig at amd.com>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>
> Cc: Ben Skeggs <bskeggs at redhat.com>
> Cc: Eric Anholt <eric at anholt.net>
> Cc: VMware Graphics <linux-graphics-maintainer at vmware.com>
> Cc: Mathieu Larouche <mathieu.larouche at matrox.com>
> Cc: Thierry Reding <treding at nvidia.com>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---
> drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 10 ++++++----
> drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 10 ++++++----
> drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 10 ++++++----
> drivers/gpu/drm/ast/ast_mode.c | 10 ++++++----
> drivers/gpu/drm/cirrus/cirrus_mode.c | 8 +++++---
> drivers/gpu/drm/drm_atomic_helper.c | 13 ++++++-------
> drivers/gpu/drm/drm_crtc.c | 2 +-
> drivers/gpu/drm/drm_fb_helper.c | 2 +-
> drivers/gpu/drm/gma500/gma_display.c | 9 +++++----
> drivers/gpu/drm/gma500/gma_display.h | 4 ++--
> drivers/gpu/drm/mgag200/mgag200_mode.c | 9 +++++----
> drivers/gpu/drm/nouveau/dispnv04/crtc.c | 12 +++++++-----
> drivers/gpu/drm/nouveau/nv50_display.c | 9 +++++----
> drivers/gpu/drm/radeon/radeon_display.c | 11 +++++++----
> drivers/gpu/drm/vc4/vc4_crtc.c | 8 +++++---
> drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 8 +++++---
> drivers/gpu/drm/vmwgfx/vmwgfx_kms.h | 4 ++--
> include/drm/drm_atomic_helper.h | 6 +++---
> include/drm/drm_crtc.h | 4 ++--
> 19 files changed, 85 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
> index 7e57447bf5f4..112e358f0f9b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
> @@ -2667,19 +2667,21 @@ static void dce_v10_0_cursor_reset(struct drm_crtc *crtc)
> }
> }
>
> -static void dce_v10_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int dce_v10_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
> - int end = (start + size > 256) ? 256 : start + size, i;
> + int i;
>
> /* userspace palettes are always correct as is */
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> amdgpu_crtc->lut_r[i] = red[i] >> 6;
> amdgpu_crtc->lut_g[i] = green[i] >> 6;
> amdgpu_crtc->lut_b[i] = blue[i] >> 6;
> }
> dce_v10_0_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> static void dce_v10_0_crtc_destroy(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
> index da101551960b..b522fa2435a8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
> @@ -2678,19 +2678,21 @@ static void dce_v11_0_cursor_reset(struct drm_crtc *crtc)
> }
> }
>
> -static void dce_v11_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int dce_v11_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
> - int end = (start + size > 256) ? 256 : start + size, i;
> + int i;
>
> /* userspace palettes are always correct as is */
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> amdgpu_crtc->lut_r[i] = red[i] >> 6;
> amdgpu_crtc->lut_g[i] = green[i] >> 6;
> amdgpu_crtc->lut_b[i] = blue[i] >> 6;
> }
> dce_v11_0_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> static void dce_v11_0_crtc_destroy(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
> index 41d9bc5f9c0e..b50ed72feedb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
> @@ -2574,19 +2574,21 @@ static void dce_v8_0_cursor_reset(struct drm_crtc *crtc)
> }
> }
>
> -static void dce_v8_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int dce_v8_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
> - int end = (start + size > 256) ? 256 : start + size, i;
> + int i;
>
> /* userspace palettes are always correct as is */
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> amdgpu_crtc->lut_r[i] = red[i] >> 6;
> amdgpu_crtc->lut_g[i] = green[i] >> 6;
> amdgpu_crtc->lut_b[i] = blue[i] >> 6;
> }
> dce_v8_0_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> static void dce_v8_0_crtc_destroy(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
> index c337922606e3..5957c3e659fe 100644
> --- a/drivers/gpu/drm/ast/ast_mode.c
> +++ b/drivers/gpu/drm/ast/ast_mode.c
> @@ -624,19 +624,21 @@ static void ast_crtc_reset(struct drm_crtc *crtc)
>
> }
>
> -static void ast_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int ast_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
> - int end = (start + size > 256) ? 256 : start + size, i;
> + int i;
>
> /* userspace palettes are always correct as is */
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> ast_crtc->lut_r[i] = red[i] >> 8;
> ast_crtc->lut_g[i] = green[i] >> 8;
> ast_crtc->lut_b[i] = blue[i] >> 8;
> }
> ast_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
>
> diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
> index 0b1a411cb89e..17c915d9a03e 100644
> --- a/drivers/gpu/drm/cirrus/cirrus_mode.c
> +++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
> @@ -325,18 +325,20 @@ static void cirrus_crtc_commit(struct drm_crtc *crtc)
> * use this for 8-bit mode so can't perform smooth fades on deeper modes,
> * but it's a requirement that we provide the function
> */
> -static void cirrus_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int cirrus_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc);
> int i;
>
> - for (i = 0; i < CIRRUS_LUT_SIZE; i++) {
> + for (i = 0; i < size; i++) {
> cirrus_crtc->lut_r[i] = red[i];
> cirrus_crtc->lut_g[i] = green[i];
> cirrus_crtc->lut_b[i] = blue[i];
> }
> cirrus_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> /* Simple cleanup function */
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 4342f3dfc0e1..191d84f12e67 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -2920,16 +2920,15 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
> * @red: red correction table
> * @green: green correction table
> * @blue: green correction table
> - * @start: first entry, must always be 0
> * @size: size of the tables
> *
> * Implements support for legacy gamma correction table for drivers
> * that support color management through the DEGAMMA_LUT/GAMMA_LUT
> * properties.
> */
> -void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> - u16 *red, u16 *green, u16 *blue,
> - uint32_t start, uint32_t size)
> +int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> + u16 *red, u16 *green, u16 *blue,
> + uint32_t size)
> {
> struct drm_device *dev = crtc->dev;
> struct drm_mode_config *config = &dev->mode_config;
> @@ -2941,7 +2940,7 @@ void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
>
> state = drm_atomic_state_alloc(crtc->dev);
> if (!state)
> - return;
> + return -ENOMEM;
>
> blob = drm_property_create_blob(dev,
> sizeof(struct drm_color_lut) * size,
> @@ -2992,7 +2991,7 @@ retry:
>
> drm_property_unreference_blob(blob);
>
> - return;
> + return 0;
> fail:
> if (ret == -EDEADLK)
> goto backoff;
> @@ -3000,7 +2999,7 @@ fail:
> drm_atomic_state_free(state);
> drm_property_unreference_blob(blob);
>
> - return;
> + return ret;
> backoff:
> drm_atomic_state_clear(state);
> drm_atomic_legacy_backoff(state);
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index a9cabef98f6b..da2f28ea5fad 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -5171,7 +5171,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
> goto out;
> }
>
> - crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
> + ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
>
> out:
> drm_modeset_unlock_all(dev);
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 7590df5e2e72..58ed6e6d4f12 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -227,7 +227,7 @@ static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
> g_base = r_base + crtc->gamma_size;
> b_base = g_base + crtc->gamma_size;
>
> - crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
> + crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
> }
>
> /**
> diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c
> index c95406e6f44d..5b636bf0b467 100644
> --- a/drivers/gpu/drm/gma500/gma_display.c
> +++ b/drivers/gpu/drm/gma500/gma_display.c
> @@ -175,20 +175,21 @@ void gma_crtc_load_lut(struct drm_crtc *crtc)
> }
> }
>
> -void gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
> - u32 start, u32 size)
> +int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
> + u32 size)
> {
> struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
> int i;
> - int end = (start + size > 256) ? 256 : start + size;
>
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> gma_crtc->lut_r[i] = red[i] >> 8;
> gma_crtc->lut_g[i] = green[i] >> 8;
> gma_crtc->lut_b[i] = blue[i] >> 8;
> }
>
> gma_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> /**
> diff --git a/drivers/gpu/drm/gma500/gma_display.h b/drivers/gpu/drm/gma500/gma_display.h
> index b2491c65f053..e72dd08b701b 100644
> --- a/drivers/gpu/drm/gma500/gma_display.h
> +++ b/drivers/gpu/drm/gma500/gma_display.h
> @@ -72,8 +72,8 @@ extern int gma_crtc_cursor_set(struct drm_crtc *crtc,
> uint32_t width, uint32_t height);
> extern int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y);
> extern void gma_crtc_load_lut(struct drm_crtc *crtc);
> -extern void gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, u32 start, u32 size);
> +extern int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, u32 size);
> extern void gma_crtc_dpms(struct drm_crtc *crtc, int mode);
> extern void gma_crtc_prepare(struct drm_crtc *crtc);
> extern void gma_crtc_commit(struct drm_crtc *crtc);
> diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
> index d347dca17267..6b21cb27e1cc 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_mode.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
> @@ -1352,19 +1352,20 @@ static void mga_crtc_commit(struct drm_crtc *crtc)
> * use this for 8-bit mode so can't perform smooth fades on deeper modes,
> * but it's a requirement that we provide the function
> */
> -static void mga_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int mga_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct mga_crtc *mga_crtc = to_mga_crtc(crtc);
> - int end = (start + size > MGAG200_LUT_SIZE) ? MGAG200_LUT_SIZE : start + size;
> int i;
>
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> mga_crtc->lut_r[i] = red[i] >> 8;
> mga_crtc->lut_g[i] = green[i] >> 8;
> mga_crtc->lut_b[i] = blue[i] >> 8;
> }
> mga_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> /* Simple cleanup function */
> diff --git a/drivers/gpu/drm/nouveau/dispnv04/crtc.c b/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> index 6f318c54da33..0cb7a18cde26 100644
> --- a/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> +++ b/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> @@ -785,14 +785,14 @@ nv_crtc_disable(struct drm_crtc *crtc)
> nouveau_bo_ref(NULL, &disp->image[nv_crtc->index]);
> }
>
> -static void
> -nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, uint32_t start,
> +static int
> +nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
> uint32_t size)
> {
> - int end = (start + size > 256) ? 256 : start + size, i;
> struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
> + int i;
>
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> nv_crtc->lut.r[i] = r[i];
> nv_crtc->lut.g[i] = g[i];
> nv_crtc->lut.b[i] = b[i];
> @@ -805,10 +805,12 @@ nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, uint32_t start,
> */
> if (!nv_crtc->base.primary->fb) {
> nv_crtc->lut.depth = 0;
> - return;
> + return 0;
> }
>
> nv_crtc_gamma_load(crtc);
> +
> + return 0;
> }
>
> static int
> diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
> index 3ffc2b0057bf..7a7788212df7 100644
> --- a/drivers/gpu/drm/nouveau/nv50_display.c
> +++ b/drivers/gpu/drm/nouveau/nv50_display.c
> @@ -1346,21 +1346,22 @@ nv50_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
> return 0;
> }
>
> -static void
> +static int
> nv50_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
> - uint32_t start, uint32_t size)
> + uint32_t size)
> {
> struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
> - u32 end = min_t(u32, start + size, 256);
> u32 i;
>
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; i++) {
> nv_crtc->lut.r[i] = r[i];
> nv_crtc->lut.g[i] = g[i];
> nv_crtc->lut.b[i] = b[i];
> }
>
> nv50_crtc_lut_load(crtc);
> +
> + return 0;
> }
>
> static void
> diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
> index 2fb18f13395c..e85c7a2f565b 100644
> --- a/drivers/gpu/drm/radeon/radeon_display.c
> +++ b/drivers/gpu/drm/radeon/radeon_display.c
> @@ -231,19 +231,21 @@ void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
> *blue = radeon_crtc->lut_b[regno] << 6;
> }
>
> -static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> - u16 *blue, uint32_t start, uint32_t size)
> +static int radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> + u16 *blue, uint32_t size)
> {
> struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
> - int end = (start + size > 256) ? 256 : start + size, i;
> + int i;
>
> /* userspace palettes are always correct as is */
> - for (i = start; i < end; i++) {
> + for (i = 0; i < size; 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;
> }
> radeon_crtc_load_lut(crtc);
> +
> + return 0;
> }
>
> static void radeon_crtc_destroy(struct drm_crtc *crtc)
> @@ -688,6 +690,7 @@ radeon_crtc_set_config(struct drm_mode_set *set)
> pm_runtime_put_autosuspend(dev->dev);
> return ret;
> }
> +
> static const struct drm_crtc_funcs radeon_crtc_funcs = {
> .cursor_set2 = radeon_crtc_cursor_set2,
> .cursor_move = radeon_crtc_cursor_move,
> diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
> index ba2e373ec901..4c0f26a644a3 100644
> --- a/drivers/gpu/drm/vc4/vc4_crtc.c
> +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
> @@ -175,20 +175,22 @@ vc4_crtc_lut_load(struct drm_crtc *crtc)
> HVS_WRITE(SCALER_GAMDATA, vc4_crtc->lut_b[i]);
> }
>
> -static void
> +static int
> vc4_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
> - uint32_t start, uint32_t size)
> + uint32_t size)
> {
> struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
> u32 i;
>
> - for (i = start; i < start + size; i++) {
> + for (i = 0; i < size; i++) {
> vc4_crtc->lut_r[i] = r[i] >> 8;
> vc4_crtc->lut_g[i] = g[i] >> 8;
> vc4_crtc->lut_b[i] = b[i] >> 8;
> }
>
> vc4_crtc_lut_load(crtc);
> +
> + return 0;
> }
>
> static u32 vc4_get_fifo_full_level(u32 format)
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> index 55231cce73a0..8a69d4da40b5 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> @@ -1404,9 +1404,9 @@ static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
> return 0;
> }
>
> -void vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
> - u16 *r, u16 *g, u16 *b,
> - uint32_t start, uint32_t size)
> +int vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
> + u16 *r, u16 *g, u16 *b,
> + uint32_t size)
> {
> struct vmw_private *dev_priv = vmw_priv(crtc->dev);
> int i;
> @@ -1418,6 +1418,8 @@ void vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
> vmw_write(dev_priv, SVGA_PALETTE_BASE + i * 3 + 1, g[i] >> 8);
> vmw_write(dev_priv, SVGA_PALETTE_BASE + i * 3 + 2, b[i] >> 8);
> }
> +
> + return 0;
> }
>
> int vmw_du_connector_dpms(struct drm_connector *connector, int mode)
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
> index 57203212c501..ff4803c107bc 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
> @@ -195,9 +195,9 @@ struct vmw_display_unit {
> void vmw_du_cleanup(struct vmw_display_unit *du);
> void vmw_du_crtc_save(struct drm_crtc *crtc);
> void vmw_du_crtc_restore(struct drm_crtc *crtc);
> -void vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
> +int vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
> u16 *r, u16 *g, u16 *b,
> - uint32_t start, uint32_t size);
> + uint32_t size);
> int vmw_du_crtc_cursor_set2(struct drm_crtc *crtc, struct drm_file *file_priv,
> uint32_t handle, uint32_t width, uint32_t height,
> int32_t hot_x, int32_t hot_y);
> diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> index b03bd83703b4..1877a7c18d8e 100644
> --- a/include/drm/drm_atomic_helper.h
> +++ b/include/drm/drm_atomic_helper.h
> @@ -147,9 +147,9 @@ void
> __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
> void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> struct drm_connector_state *state);
> -void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> - u16 *red, u16 *green, u16 *blue,
> - uint32_t start, uint32_t size);
> +int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> + u16 *red, u16 *green, u16 *blue,
> + uint32_t size);
>
> /**
> * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index f59d8a2d8920..411be4f45506 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -479,8 +479,8 @@ struct drm_crtc_funcs {
> * going on, which should eventually be unified to just one set of
> * hooks.
> */
> - void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
> - uint32_t start, uint32_t size);
> + int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
> + uint32_t size);
>
> /**
> * @destroy:
> --
> 2.5.5
>
>
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