To support legacy gamma ioctls the drivers need to set
drm_crtc_funcs.gamma_set either to a custom implementation or to
drm_atomic_helper_legacy_gamma_set. Most of the atomic drivers do the
latter.
We can simplify this by making the core handle it automatically.
Move the drm_atomic_helper_legacy_gamma_set() functionality into
drm_color_mgmt.c to make drm_mode_gamma_set_ioctl() use
drm_crtc_funcs.gamma_set if set or GAMMA_LUT property if not.
Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 -
.../gpu/drm/arm/display/komeda/komeda_crtc.c | 1 -
drivers/gpu/drm/arm/malidp_crtc.c | 1 -
drivers/gpu/drm/armada/armada_crtc.c | 1 -
drivers/gpu/drm/ast/ast_mode.c | 1 -
.../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 1 -
drivers/gpu/drm/drm_atomic_helper.c | 70 -----------
drivers/gpu/drm/drm_color_mgmt.c | 111 ++++++++++++++++--
drivers/gpu/drm/i915/display/intel_display.c | 1 -
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 2 -
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 1 -
drivers/gpu/drm/nouveau/dispnv50/head.c | 2 -
drivers/gpu/drm/omapdrm/omap_crtc.c | 1 -
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 1 -
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 1 -
drivers/gpu/drm/stm/ltdc.c | 1 -
drivers/gpu/drm/vc4/vc4_crtc.c | 1 -
drivers/gpu/drm/vc4/vc4_txp.c | 1 -
include/drm/drm_atomic_helper.h | 4 -
19 files changed, 102 insertions(+), 101 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 2855bb918535..848b06c51b0e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5396,7 +5396,6 @@ static void dm_disable_vblank(struct drm_crtc *crtc)
static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
.reset = dm_crtc_reset_state,
.destroy = amdgpu_dm_crtc_destroy,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = dm_crtc_duplicate_state,
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 4b485eb512e2..59172acb9738 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -550,7 +550,6 @@ static void komeda_crtc_vblank_disable(struct drm_crtc
*crtc)
}
static const struct drm_crtc_funcs komeda_crtc_funcs = {
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
diff --git a/drivers/gpu/drm/arm/malidp_crtc.c
b/drivers/gpu/drm/arm/malidp_crtc.c
index 108e7a31bd26..494075ddbef6 100644
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -510,7 +510,6 @@ static void malidp_crtc_disable_vblank(struct drm_crtc
*crtc)
}
static const struct drm_crtc_funcs malidp_crtc_funcs = {
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
diff --git a/drivers/gpu/drm/armada/armada_crtc.c
b/drivers/gpu/drm/armada/armada_crtc.c
index 3ebcf5a52c8b..b7bb90ae787f 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -820,7 +820,6 @@ static const struct drm_crtc_funcs armada_crtc_funcs = {
.cursor_set = armada_drm_crtc_cursor_set,
.cursor_move = armada_drm_crtc_cursor_move,
.destroy = armada_drm_crtc_destroy,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 9db371f4054f..5b0ec785c516 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -903,7 +903,6 @@ static void ast_crtc_atomic_destroy_state(struct drm_crtc
*crtc,
static const struct drm_crtc_funcs ast_crtc_funcs = {
.reset = ast_crtc_reset,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index c58fa00b4848..05ad75d155e8 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -473,7 +473,6 @@ static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs =
{
.atomic_destroy_state = atmel_hlcdc_crtc_destroy_state,
.enable_vblank = atmel_hlcdc_crtc_enable_vblank,
.disable_vblank = atmel_hlcdc_crtc_disable_vblank,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
int atmel_hlcdc_crtc_create(struct drm_device *dev)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
index ba1507036f26..b114658100b3 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3499,76 +3499,6 @@ int drm_atomic_helper_page_flip_target(struct drm_crtc
*crtc,
}
EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
-/**
- * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
- * @crtc: CRTC object
- * @red: red correction table
- * @green: green correction table
- * @blue: green correction table
- * @size: size of the tables
- * @ctx: lock acquire context
- *
- * Implements support for legacy gamma correction table for drivers
- * that support color management through the DEGAMMA_LUT/GAMMA_LUT
- * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for
- * how the atomic color management and gamma tables work.
- */
-int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
- u16 *red, u16 *green, u16 *blue,
- uint32_t size,
- struct drm_modeset_acquire_ctx *ctx)
-{
- struct drm_device *dev = crtc->dev;
- struct drm_atomic_state *state;
- struct drm_crtc_state *crtc_state;
- struct drm_property_blob *blob = NULL;
- struct drm_color_lut *blob_data;
- int i, ret = 0;
- bool replaced;
-
- state = drm_atomic_state_alloc(crtc->dev);
- if (!state)
- return -ENOMEM;
-
- blob = drm_property_create_blob(dev,
- sizeof(struct drm_color_lut) * size,
- NULL);
- if (IS_ERR(blob)) {
- ret = PTR_ERR(blob);
- blob = NULL;
- goto fail;
- }
-
- /* Prepare GAMMA_LUT with the legacy values. */
- blob_data = blob->data;
- for (i = 0; i < size; i++) {
- blob_data[i].red = red[i];
- blob_data[i].green = green[i];
- blob_data[i].blue = blue[i];
- }
-
- state->acquire_ctx = ctx;
- crtc_state = drm_atomic_get_crtc_state(state, crtc);
- if (IS_ERR(crtc_state)) {
- ret = PTR_ERR(crtc_state);
- goto fail;
- }
-
- /* Reset DEGAMMA_LUT and CTM properties. */
- replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL);
- replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
- replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob);
- crtc_state->color_mgmt_changed |= replaced;
-
- ret = drm_atomic_commit(state);
-
-fail:
- drm_atomic_state_put(state);
- drm_property_blob_put(blob);
- return ret;
-}
-EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
-
/**
* drm_atomic_helper_bridge_propagate_bus_fmt() - Propagate output format to
* the input end of a bridge
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index 3bcabc2f6e0e..65eb36dc92bf 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -22,6 +22,7 @@
#include <linux/uaccess.h>
+#include <drm/drm_atomic.h>
#include <drm/drm_color_mgmt.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
@@ -89,9 +90,8 @@
* modes) appropriately.
*
* There is also support for a legacy gamma table, which is set up by calling
- * drm_mode_crtc_set_gamma_size(). Drivers which support both should use
- * drm_atomic_helper_legacy_gamma_set() to alias the legacy gamma ramp with the
- * "GAMMA_LUT" property above.
+ * drm_mode_crtc_set_gamma_size(). The DRM core will then alias the legacy
gamma
+ * ramp with "GAMMA_LUT".
*
* Support for different non RGB color encodings is controlled through
* &drm_plane specific COLOR_ENCODING and COLOR_RANGE properties. They
@@ -156,9 +156,6 @@ EXPORT_SYMBOL(drm_color_ctm_s31_32_to_qm_n);
* optional. The gamma and degamma properties are only attached if
* their size is not 0 and ctm_property is only attached if has_ctm is
* true.
- *
- * Drivers should use drm_atomic_helper_legacy_gamma_set() to implement the
- * legacy &drm_crtc_funcs.gamma_set callback.
*/
void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
uint degamma_lut_size,
@@ -231,6 +228,102 @@ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
}
EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
+/**
+ * drm_crtc_supports_legacy_gamma - does the crtc support legacy gamma
correction table
+ * @crtc: CRTC object
+ *
+ * Returns true/false if the given crtc supports setting the legacy gamma
+ * correction table.
+ */
+static bool drm_crtc_supports_legacy_gamma(struct drm_crtc *crtc)
+{
+ uint32_t gamma_id = crtc->dev->mode_config.gamma_lut_property->base.id;
+
+ if (!crtc->gamma_size)
+ return false;
+
+ if (crtc->funcs->gamma_set)
+ return true;
+
+ return !!drm_mode_obj_find_prop_id(&crtc->base, gamma_id);
+}
+
+/**
+ * drm_crtc_legacy_gamma_set - set the legacy gamma correction table
+ * @crtc: CRTC object
+ * @red: red correction table
+ * @green: green correction table
+ * @blue: green correction table
+ * @size: size of the tables
+ * @ctx: lock acquire context
+ *
+ * Implements support for legacy gamma correction table for drivers
+ * that have set drm_crtc_funcs.gamma_set or that support color management
+ * through the DEGAMMA_LUT/GAMMA_LUT properties. See
+ * drm_crtc_enable_color_mgmt() and the containing chapter for
+ * how the atomic color management and gamma tables work.
+ *
+ * This function sets the gamma using drm_crtc_funcs.gamma_set if set, or
+ * alternatively using crtc color management properties.
+ */
+static int drm_crtc_legacy_gamma_set(struct drm_crtc *crtc,
+ u16 *red, u16 *green, u16 *blue,
+ uint32_t size,
+ struct drm_modeset_acquire_ctx *ctx)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_atomic_state *state;
+ struct drm_crtc_state *crtc_state;
+ struct drm_property_blob *blob;
+ struct drm_color_lut *blob_data;
+ int i, ret = 0;
+ bool replaced;
+
+ if (crtc->funcs->gamma_set)
+ return crtc->funcs->gamma_set(crtc, red, green, blue, size,
ctx);
+
+ state = drm_atomic_state_alloc(crtc->dev);
+ if (!state)
+ return -ENOMEM;
+
+ blob = drm_property_create_blob(dev,
+ sizeof(struct drm_color_lut) * size,
+ NULL);
+ if (IS_ERR(blob)) {
+ ret = PTR_ERR(blob);
+ blob = NULL;
+ goto fail;
+ }
+
+ /* Prepare GAMMA_LUT with the legacy values. */
+ blob_data = blob->data;
+ for (i = 0; i < size; i++) {
+ blob_data[i].red = red[i];
+ blob_data[i].green = green[i];
+ blob_data[i].blue = blue[i];
+ }
+
+ state->acquire_ctx = ctx;
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state)) {
+ ret = PTR_ERR(crtc_state);
+ goto fail;
+ }
+
+ /* Set GAMMA_LUT and reset DEGAMMA_LUT and CTM */
+ replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL);
+ replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
+ replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob);
+ crtc_state->color_mgmt_changed |= replaced;
+
+ ret = drm_atomic_commit(state);
+
+fail:
+ drm_atomic_state_put(state);
+ drm_property_blob_put(blob);
+ return ret;
+}
+
/**
* drm_mode_gamma_set_ioctl - set the gamma table
* @dev: DRM device
@@ -262,7 +355,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
if (!crtc)
return -ENOENT;
- if (crtc->funcs->gamma_set == NULL)
+ if (!drm_crtc_supports_legacy_gamma(crtc))
return -ENOSYS;
/* memcpy into gamma store */
@@ -290,8 +383,8 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
goto out;
}
- ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base,
- crtc->gamma_size, &ctx);
+ ret = drm_crtc_legacy_gamma_set(crtc, r_base, g_base, b_base,
+ crtc->gamma_size, &ctx);
out:
DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index cddbda5303ff..1e90b8c3b1c7 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16879,7 +16879,6 @@ intel_cursor_plane_create(struct drm_i915_private
*dev_priv,
}
#define INTEL_CRTC_FUNCS \
- .gamma_set = drm_atomic_helper_legacy_gamma_set, \
.set_config = drm_atomic_helper_set_config, \
.destroy = intel_crtc_destroy, \
.page_flip = drm_atomic_helper_page_flip, \
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index 42d335d3a114..7bb31fbee29d 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -774,8 +774,6 @@ static const struct drm_crtc_funcs ingenic_drm_crtc_funcs =
{
.enable_vblank = ingenic_drm_enable_vblank,
.disable_vblank = ingenic_drm_disable_vblank,
-
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
static const struct drm_plane_helper_funcs ingenic_drm_plane_helper_funcs = {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index bfe994230543..b665bd498a4a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -619,7 +619,6 @@ static const struct drm_crtc_funcs mtk_crtc_funcs = {
.reset = mtk_drm_crtc_reset,
.atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
.atomic_destroy_state = mtk_drm_crtc_destroy_state,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.enable_vblank = mtk_drm_crtc_enable_vblank,
.disable_vblank = mtk_drm_crtc_disable_vblank,
};
diff --git a/drivers/gpu/drm/nouveau/dispnv50/head.c
b/drivers/gpu/drm/nouveau/dispnv50/head.c
index 537c1ef2e464..ec361d17e900 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/head.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/head.c
@@ -503,7 +503,6 @@ nv50_head_destroy(struct drm_crtc *crtc)
static const struct drm_crtc_funcs
nv50_head_func = {
.reset = nv50_head_reset,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.destroy = nv50_head_destroy,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
@@ -518,7 +517,6 @@ nv50_head_func = {
static const struct drm_crtc_funcs
nvd9_head_func = {
.reset = nv50_head_reset,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.destroy = nv50_head_destroy,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c
b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 7d66269ad998..b97f21cf4a91 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -741,7 +741,6 @@ static const struct drm_crtc_funcs omap_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.destroy = omap_crtc_destroy,
.page_flip = drm_atomic_helper_page_flip,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.atomic_duplicate_state = omap_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_set_property = omap_crtc_atomic_set_property,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index b5fb941e0f53..f93e0750431d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -1144,7 +1144,6 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
.set_crc_source = rcar_du_crtc_set_crc_source,
.verify_crc_source = rcar_du_crtc_verify_crc_source,
.get_crc_sources = rcar_du_crtc_get_crc_sources,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
/*
-----------------------------------------------------------------------------
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d1e05482641b..8d15cabdcb02 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1643,7 +1643,6 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
.disable_vblank = vop_crtc_disable_vblank,
.set_crc_source = vop_crtc_set_crc_source,
.verify_crc_source = vop_crtc_verify_crc_source,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 3980677435cb..7812094f93d6 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -713,7 +713,6 @@ static const struct drm_crtc_funcs ltdc_crtc_funcs = {
.enable_vblank = ltdc_crtc_enable_vblank,
.disable_vblank = ltdc_crtc_disable_vblank,
.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
/*
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index ea710beb8e00..7495d70d6a32 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -884,7 +884,6 @@ static const struct drm_crtc_funcs vc4_crtc_funcs = {
.reset = vc4_crtc_reset,
.atomic_duplicate_state = vc4_crtc_duplicate_state,
.atomic_destroy_state = vc4_crtc_destroy_state,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.enable_vblank = vc4_enable_vblank,
.disable_vblank = vc4_disable_vblank,
.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
index 8aa5220885f4..e4b782e42f69 100644
--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -382,7 +382,6 @@ static const struct drm_crtc_funcs vc4_txp_crtc_funcs = {
.reset = vc4_crtc_reset,
.atomic_duplicate_state = vc4_crtc_duplicate_state,
.atomic_destroy_state = vc4_crtc_destroy_state,
- .gamma_set = drm_atomic_helper_legacy_gamma_set,
.enable_vblank = vc4_txp_enable_vblank,
.disable_vblank = vc4_txp_disable_vblank,
};
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 5f47720440fa..4045e2507e11 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -147,10 +147,6 @@ int drm_atomic_helper_page_flip_target(
uint32_t flags,
uint32_t target,
struct drm_modeset_acquire_ctx *ctx);
-int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
- u16 *red, u16 *green, u16 *blue,
- uint32_t size,
- struct drm_modeset_acquire_ctx *ctx);
/**
* drm_atomic_crtc_for_each_plane - iterate over planes currently attached to
CRTC
--
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