[RFC PATCH v4 09/42] drm/colorop: Introduce new drm_colorop mode object
Melissa Wen
mwen at igalia.com
Tue May 21 15:28:19 UTC 2024
On 02/26, Harry Wentland wrote:
> This patches introduces a new drm_colorop mode object. This
> object represents color transformations and can be used to
> define color pipelines.
>
> We also introduce the drm_colorop_state here, as well as
> various helpers and state tracking bits.
>
> v4:
> - Drop IOCTL definitions (Pekka)
> - add missing declaration (Chaitanya Kumar Borah)
>
> v3:
> - Drop TODO for lock (it's handled in drm_modeset_drop_locks)
> (Melissa)
> - Don't get plane state when getting colorop state
> - Make some functions static (kernel test robot)
>
> Signed-off-by: Harry Wentland <harry.wentland at amd.com>
> ---
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/drm_atomic.c | 70 ++++++++++++
> drivers/gpu/drm/drm_atomic_helper.c | 12 +++
> drivers/gpu/drm/drm_atomic_uapi.c | 48 +++++++++
> drivers/gpu/drm/drm_colorop.c | 152 ++++++++++++++++++++++++++
> drivers/gpu/drm/drm_mode_config.c | 7 ++
> include/drm/drm_atomic.h | 82 +++++++++++++++
> include/drm/drm_atomic_uapi.h | 1 +
> include/drm/drm_colorop.h | 158 ++++++++++++++++++++++++++++
> include/drm/drm_mode_config.h | 18 ++++
> include/drm/drm_plane.h | 2 +
> include/uapi/drm/drm_mode.h | 1 +
> 12 files changed, 552 insertions(+)
> create mode 100644 drivers/gpu/drm/drm_colorop.c
> create mode 100644 include/drm/drm_colorop.h
>
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 104b42df2e95..4b14dcbb6117 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -16,6 +16,7 @@ drm-y := \
> drm_client.o \
> drm_client_modeset.o \
> drm_color_mgmt.o \
> + drm_colorop.o \
> drm_connector.o \
> drm_crtc.o \
> drm_displayid.o \
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index a91737adf8e7..62e87e6a9653 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -42,6 +42,7 @@
> #include <drm/drm_mode.h>
> #include <drm/drm_print.h>
> #include <drm/drm_writeback.h>
> +#include <drm/drm_colorop.h>
>
> #include "drm_crtc_internal.h"
> #include "drm_internal.h"
> @@ -108,6 +109,7 @@ void drm_atomic_state_default_release(struct drm_atomic_state *state)
> kfree(state->connectors);
> kfree(state->crtcs);
> kfree(state->planes);
> + kfree(state->colorops);
> kfree(state->private_objs);
> }
> EXPORT_SYMBOL(drm_atomic_state_default_release);
> @@ -139,6 +141,10 @@ drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
> sizeof(*state->planes), GFP_KERNEL);
> if (!state->planes)
> goto fail;
> + state->colorops = kcalloc(dev->mode_config.num_colorop,
> + sizeof(*state->colorops), GFP_KERNEL);
> + if (!state->colorops)
> + goto fail;
>
> /*
> * Because drm_atomic_state can be committed asynchronously we need our
> @@ -250,6 +256,20 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
> state->planes[i].new_state = NULL;
> }
>
> + for (i = 0; i < config->num_colorop; i++) {
> + struct drm_colorop *colorop = state->colorops[i].ptr;
> +
> + if (!colorop)
> + continue;
> +
> + drm_colorop_atomic_destroy_state(colorop,
> + state->colorops[i].state);
> + state->colorops[i].ptr = NULL;
> + state->colorops[i].state = NULL;
> + state->colorops[i].old_state = NULL;
> + state->colorops[i].new_state = NULL;
> + }
> +
> for (i = 0; i < state->num_private_objs; i++) {
> struct drm_private_obj *obj = state->private_objs[i].ptr;
>
> @@ -571,6 +591,56 @@ drm_atomic_get_plane_state(struct drm_atomic_state *state,
> }
> EXPORT_SYMBOL(drm_atomic_get_plane_state);
>
> +
> +/**
> + * drm_atomic_get_colorop_state - get colorop state
> + * @state: global atomic state object
> + * @colorop: colorop to get state object for
> + *
> + * This function returns the colorop state for the given colorop, allocating it
> + * if needed. It will also grab the relevant plane lock to make sure that the
> + * state is consistent.
> + *
> + * Returns:
> + *
> + * Either the allocated state or the error code encoded into the pointer. When
> + * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
> + * entire atomic sequence must be restarted. All other errors are fatal.
> + */
> +struct drm_colorop_state *
> +drm_atomic_get_colorop_state(struct drm_atomic_state *state,
> + struct drm_colorop *colorop)
> +{
> + int ret, index = drm_colorop_index(colorop);
> + struct drm_colorop_state *colorop_state;
> +
> + WARN_ON(!state->acquire_ctx);
> +
> + colorop_state = drm_atomic_get_existing_colorop_state(state, colorop);
> + if (colorop_state)
> + return colorop_state;
> +
> + ret = drm_modeset_lock(&colorop->plane->mutex, state->acquire_ctx);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + colorop_state = drm_atomic_helper_colorop_duplicate_state(colorop);
> + if (!colorop_state)
> + return ERR_PTR(-ENOMEM);
> +
> + state->colorops[index].state = colorop_state;
> + state->colorops[index].ptr = colorop;
> + state->colorops[index].old_state = colorop->state;
> + state->colorops[index].new_state = colorop_state;
> + colorop_state->state = state;
> +
> + drm_dbg_atomic(colorop->dev, "Added [COLOROP:%d] %p state to %p\n",
> + colorop->base.id, colorop_state, state);
> +
> + return colorop_state;
> +}
> +EXPORT_SYMBOL(drm_atomic_get_colorop_state);
> +
> static bool
> plane_switching_crtc(const struct drm_plane_state *old_plane_state,
> const struct drm_plane_state *new_plane_state)
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 39ef0a6addeb..282aa1f7b9a6 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -3022,6 +3022,8 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
> struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> struct drm_plane *plane;
> struct drm_plane_state *old_plane_state, *new_plane_state;
> + struct drm_colorop *colorop;
> + struct drm_colorop_state *old_colorop_state, *new_colorop_state;
> struct drm_crtc_commit *commit;
> struct drm_private_obj *obj;
> struct drm_private_state *old_obj_state, *new_obj_state;
> @@ -3099,6 +3101,16 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
> }
> }
>
> + for_each_oldnew_colorop_in_state(state, colorop, old_colorop_state, new_colorop_state, i) {
> + WARN_ON(colorop->state != old_colorop_state);
> +
> + old_colorop_state->state = state;
> + new_colorop_state->state = NULL;
> +
> + state->colorops[i].state = old_colorop_state;
> + colorop->state = new_colorop_state;
> + }
> +
> for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
> WARN_ON(plane->state != old_plane_state);
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index 29d4940188d4..1f9b6dfa8ca7 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -34,6 +34,7 @@
> #include <drm/drm_drv.h>
> #include <drm/drm_writeback.h>
> #include <drm/drm_vblank.h>
> +#include <drm/drm_colorop.h>
>
> #include <linux/dma-fence.h>
> #include <linux/uaccess.h>
> @@ -642,6 +643,26 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
> return 0;
> }
>
> +
> +static int drm_atomic_colorop_set_property(struct drm_colorop *colorop,
> + struct drm_colorop_state *state, struct drm_file *file_priv,
> + struct drm_property *property, uint64_t val)
> +{
> + drm_dbg_atomic(colorop->dev,
> + "[COLOROP:%d] unknown property [PROP:%d:%s]]\n",
> + colorop->base.id,
> + property->base.id, property->name);
> + return -EINVAL;
> +}
> +
> +static int
> +drm_atomic_colorop_get_property(struct drm_colorop *colorop,
> + const struct drm_colorop_state *state,
> + struct drm_property *property, uint64_t *val)
> +{
> + return -EINVAL;
> +}
> +
> static int drm_atomic_set_writeback_fb_for_connector(
> struct drm_connector_state *conn_state,
> struct drm_framebuffer *fb)
> @@ -904,6 +925,16 @@ int drm_atomic_get_property(struct drm_mode_object *obj,
> plane->state, property, val);
> break;
> }
> + case DRM_MODE_OBJECT_COLOROP: {
> + struct drm_colorop *colorop = obj_to_colorop(obj);
> +
> + if (colorop->plane)
> + WARN_ON(!drm_modeset_is_locked(&colorop->plane->mutex));
> +
> + ret = drm_atomic_colorop_get_property(colorop,
> + colorop->state, property, val);
> + break;
> + }
> default:
> drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id);
> ret = -EINVAL;
> @@ -1084,6 +1115,23 @@ int drm_atomic_set_property(struct drm_atomic_state *state,
> ret = drm_atomic_plane_set_property(plane,
> plane_state, file_priv,
> prop, prop_value);
> +
> + break;
> + }
> + case DRM_MODE_OBJECT_COLOROP: {
> + struct drm_colorop *colorop = obj_to_colorop(obj);
> + struct drm_colorop_state *colorop_state;
> +
> + colorop_state = drm_atomic_get_colorop_state(state, colorop);
> + if (IS_ERR(colorop_state)) {
> + ret = PTR_ERR(colorop_state);
> + break;
> + }
> +
> + ret = drm_atomic_colorop_set_property(colorop,
> + colorop_state, file_priv,
> + prop, prop_value);
> +
> break;
> }
> default:
> diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
> new file mode 100644
> index 000000000000..a295ab96aee1
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_colorop.c
> @@ -0,0 +1,152 @@
> +/*
> + * Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + * OTHER DEALINGS IN THE SOFTWARE.
> + *
> + * Authors: AMD
> + *
> + */
> +
> +#include <drm/drm_colorop.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_plane.h>
> +
> +#include "drm_crtc_internal.h"
> +
> +/* TODO big colorop doc, including properties, etc. */
> +
> +/* Init Helpers */
> +
> +int drm_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
> + struct drm_plane *plane)
> +{
> + struct drm_mode_config *config = &dev->mode_config;
> + int ret = 0;
> +
> + ret = drm_mode_object_add(dev, &colorop->base, DRM_MODE_OBJECT_COLOROP);
> + if (ret)
> + return ret;
> +
> + colorop->base.properties = &colorop->properties;
> + colorop->dev = dev;
> + colorop->plane = plane;
> +
> + list_add_tail(&colorop->head, &config->colorop_list);
> + colorop->index = config->num_colorop++;
> +
> + /* add properties */
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_colorop_init);
> +
> +static void __drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop,
> + struct drm_colorop_state *state)
> +{
> + memcpy(state, colorop->state, sizeof(*state));
> +}
> +
> +struct drm_colorop_state *
> +drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop)
> +{
> + struct drm_colorop_state *state;
> +
> + if (WARN_ON(!colorop->state))
> + return NULL;
> +
> + state = kmalloc(sizeof(*state), GFP_KERNEL);
> + if (state)
> + __drm_atomic_helper_colorop_duplicate_state(colorop, state);
> +
> + return state;
> +}
> +
> +
> +void drm_colorop_atomic_destroy_state(struct drm_colorop *colorop,
> + struct drm_colorop_state *state)
> +{
> + kfree(state);
> +}
> +
> +/**
> + * drm_colorop_destroy_state - default state destroy hook
> + * @colorop: drm colorop
> + * @state: colorop state object to release
> + *
> + * Default colorop state destroy hook for drivers which don't have their own
> + * subclassed colorop state structure.
> + */
> +void drm_colorop_destroy_state(struct drm_colorop *colorop,
> + struct drm_colorop_state *state)
> +{
> + kfree(state);
> +}
> +EXPORT_SYMBOL(drm_colorop_destroy_state);
> +
> +/**
> + * __drm_colorop_state_reset - resets colorop state to default values
> + * @colorop_state: atomic colorop state, must not be NULL
> + * @colorop: colorop object, must not be NULL
> + *
> + * Initializes the newly allocated @colorop_state with default
> + * values. This is useful for drivers that subclass the CRTC state.
> + */
> +static void __drm_colorop_state_reset(struct drm_colorop_state *colorop_state,
> + struct drm_colorop *colorop)
> +{
> + colorop_state->colorop = colorop;
> +}
> +
> +/**
> + * __drm_colorop_reset - reset state on colorop
> + * @colorop: drm colorop
> + * @colorop_state: colorop state to assign
> + *
> + * Initializes the newly allocated @colorop_state and assigns it to
> + * the &drm_crtc->state pointer of @colorop, usually required when
> + * initializing the drivers or when called from the &drm_colorop_funcs.reset
> + * hook.
> + *
> + * This is useful for drivers that subclass the colorop state.
> + */
> +static void __drm_colorop_reset(struct drm_colorop *colorop,
> + struct drm_colorop_state *colorop_state)
> +{
> + if (colorop_state)
> + __drm_colorop_state_reset(colorop_state, colorop);
> +
> + colorop->state = colorop_state;
> +}
> +
> +/**
> + * drm_colorop_reset - reset colorop atomic state
> + * @colorop: drm colorop
> + *
> + * Resets the atomic state for @colorop by freeing the state pointer (which might
> + * be NULL, e.g. at driver load time) and allocating a new empty state object.
> + */
> +void drm_colorop_reset(struct drm_colorop *colorop)
> +{
> + kfree(colorop->state);
> + colorop->state = kzalloc(sizeof(*colorop->state), GFP_KERNEL);
> +
> + if (colorop->state)
> + __drm_colorop_reset(colorop, colorop->state);
> +}
> +EXPORT_SYMBOL(drm_colorop_reset);
> diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
> index 8525ef851540..30c6fb10353b 100644
> --- a/drivers/gpu/drm/drm_mode_config.c
> +++ b/drivers/gpu/drm/drm_mode_config.c
> @@ -29,6 +29,7 @@
> #include <drm/drm_managed.h>
> #include <drm/drm_mode_config.h>
> #include <drm/drm_print.h>
> +#include <drm/drm_colorop.h>
> #include <linux/dma-resv.h>
>
> #include "drm_crtc_internal.h"
> @@ -182,11 +183,15 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
> void drm_mode_config_reset(struct drm_device *dev)
> {
> struct drm_crtc *crtc;
> + struct drm_colorop *colorop;
> struct drm_plane *plane;
> struct drm_encoder *encoder;
> struct drm_connector *connector;
> struct drm_connector_list_iter conn_iter;
>
> + drm_for_each_colorop(colorop, dev)
> + drm_colorop_reset(colorop);
> +
> drm_for_each_plane(plane, dev)
> if (plane->funcs->reset)
> plane->funcs->reset(plane);
> @@ -413,6 +418,7 @@ int drmm_mode_config_init(struct drm_device *dev)
> INIT_LIST_HEAD(&dev->mode_config.property_list);
> INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
> INIT_LIST_HEAD(&dev->mode_config.plane_list);
> + INIT_LIST_HEAD(&dev->mode_config.colorop_list);
> INIT_LIST_HEAD(&dev->mode_config.privobj_list);
> idr_init_base(&dev->mode_config.object_idr, 1);
> idr_init_base(&dev->mode_config.tile_idr, 1);
> @@ -434,6 +440,7 @@ int drmm_mode_config_init(struct drm_device *dev)
> dev->mode_config.num_crtc = 0;
> dev->mode_config.num_encoder = 0;
> dev->mode_config.num_total_plane = 0;
> + dev->mode_config.num_colorop = 0;
>
> if (IS_ENABLED(CONFIG_LOCKDEP)) {
> struct drm_modeset_acquire_ctx modeset_ctx;
> diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> index cf8e1220a4ac..634b2827765f 100644
> --- a/include/drm/drm_atomic.h
> +++ b/include/drm/drm_atomic.h
> @@ -30,6 +30,7 @@
>
> #include <drm/drm_crtc.h>
> #include <drm/drm_util.h>
> +#include <drm/drm_colorop.h>
>
> /**
> * struct drm_crtc_commit - track modeset commits on a CRTC
> @@ -157,6 +158,11 @@ struct drm_crtc_commit {
> bool abort_completion;
> };
>
> +struct __drm_colorops_state {
> + struct drm_colorop *ptr;
> + struct drm_colorop_state *state, *old_state, *new_state;
> +};
> +
> struct __drm_planes_state {
> struct drm_plane *ptr;
> struct drm_plane_state *state, *old_state, *new_state;
> @@ -398,6 +404,7 @@ struct drm_atomic_state {
> * states.
> */
> bool duplicated : 1;
> + struct __drm_colorops_state *colorops;
> struct __drm_planes_state *planes;
> struct __drm_crtcs_state *crtcs;
> int num_connector;
> @@ -501,6 +508,9 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
> struct drm_plane_state * __must_check
> drm_atomic_get_plane_state(struct drm_atomic_state *state,
> struct drm_plane *plane);
> +struct drm_colorop_state *
> +drm_atomic_get_colorop_state(struct drm_atomic_state *state,
> + struct drm_colorop *colorop);
> struct drm_connector_state * __must_check
> drm_atomic_get_connector_state(struct drm_atomic_state *state,
> struct drm_connector *connector);
> @@ -630,6 +640,55 @@ drm_atomic_get_new_plane_state(const struct drm_atomic_state *state,
> return state->planes[drm_plane_index(plane)].new_state;
> }
>
> +
> +/**
> + * drm_atomic_get_existing_colorop_state - get colorop state, if it exists
> + * @state: global atomic state object
> + * @colorop: colorop to grab
> + *
> + * This function returns the colorop state for the given colorop, or NULL
> + * if the colorop is not part of the global atomic state.
> + *
> + * This function is deprecated, @drm_atomic_get_old_colorop_state or
> + * @drm_atomic_get_new_colorop_state should be used instead.
> + */
> +static inline struct drm_colorop_state *
> +drm_atomic_get_existing_colorop_state(struct drm_atomic_state *state,
> + struct drm_colorop *colorop)
> +{
> + return state->colorops[drm_colorop_index(colorop)].state;
> +}
> +
> +/**
> + * drm_atomic_get_old_colorop_state - get colorop state, if it exists
> + * @state: global atomic state object
> + * @colorop: colorop to grab
> + *
> + * This function returns the old colorop state for the given colorop, or
> + * NULL if the colorop is not part of the global atomic state.
> + */
> +static inline struct drm_colorop_state *
> +drm_atomic_get_old_colorop_state(struct drm_atomic_state *state,
> + struct drm_colorop *colorop)
> +{
> + return state->colorops[drm_colorop_index(colorop)].old_state;
> +}
> +
> +/**
> + * drm_atomic_get_new_colorop_state - get colorop state, if it exists
> + * @state: global atomic state object
> + * @colorop: colorop to grab
> + *
> + * This function returns the new colorop state for the given colorop, or
> + * NULL if the colorop is not part of the global atomic state.
> + */
> +static inline struct drm_colorop_state *
> +drm_atomic_get_new_colorop_state(struct drm_atomic_state *state,
> + struct drm_colorop *colorop)
> +{
> + return state->colorops[drm_colorop_index(colorop)].new_state;
> +}
> +
> /**
> * drm_atomic_get_existing_connector_state - get connector state, if it exists
> * @state: global atomic state object
> @@ -877,6 +936,29 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
> (new_crtc_state) = (__state)->crtcs[__i].new_state, \
> (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
>
> +/**
> + * for_each_oldnew_colorop_in_state - iterate over all colorops in an atomic update
> + * @__state: &struct drm_atomic_state pointer
> + * @colorop: &struct drm_colorop iteration cursor
> + * @old_colorop_state: &struct drm_colorop_state iteration cursor for the old state
> + * @new_colorop_state: &struct drm_colorop_state iteration cursor for the new state
> + * @__i: int iteration cursor, for macro-internal use
> + *
> + * This iterates over all colorops in an atomic update, tracking both old and
> + * new state. This is useful in places where the state delta needs to be
> + * considered, for example in atomic check functions.
> + */
> +#define for_each_oldnew_colorop_in_state(__state, colorop, old_colorop_state, new_colorop_state, __i) \
> + for ((__i) = 0; \
> + (__i) < (__state)->dev->mode_config.num_colorop; \
> + (__i)++) \
> + for_each_if ((__state)->colorops[__i].ptr && \
> + ((colorop) = (__state)->colorops[__i].ptr, \
> + (void)(colorop) /* Only to avoid unused-but-set-variable warning */, \
> + (old_colorop_state) = (__state)->colorops[__i].old_state,\
> + (new_colorop_state) = (__state)->colorops[__i].new_state, 1))
> +
> +
> /**
> * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
> * @__state: &struct drm_atomic_state pointer
> diff --git a/include/drm/drm_atomic_uapi.h b/include/drm/drm_atomic_uapi.h
> index 4c6d39d7bdb2..70a115d523cd 100644
> --- a/include/drm/drm_atomic_uapi.h
> +++ b/include/drm/drm_atomic_uapi.h
> @@ -37,6 +37,7 @@ struct drm_crtc;
> struct drm_connector_state;
> struct dma_fence;
> struct drm_framebuffer;
> +struct drm_colorop;
>
> int __must_check
> drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
> diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
> new file mode 100644
> index 000000000000..e611f830f986
> --- /dev/null
> +++ b/include/drm/drm_colorop.h
> @@ -0,0 +1,158 @@
> +/*
> + * Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + * OTHER DEALINGS IN THE SOFTWARE.
> + *
> + * Authors: AMD
> + *
> + */
> +
> +#ifndef __DRM_COLOROP_H__
> +#define __DRM_COLOROP_H__
> +
> +#include <drm/drm_mode_object.h>
> +#include <drm/drm_mode.h>
> +#include <drm/drm_property.h>
> +
> +/**
> + * struct drm_colorop_state - mutable colorop state
> + */
> +struct drm_colorop_state {
> + /** @colorop: backpointer to the colorop */
> + struct drm_colorop *colorop;
> +
> + /* colorop properties */
> +
> + /** @state: backpointer to global drm_atomic_state */
> + struct drm_atomic_state *state;
> +};
> +
> +/**
> + * struct drm_colorop - DRM color operation control structure
> + *
> + * A colorop represents one color operation. They can be chained via
> + * the 'next' pointer to build a color pipeline.
> + */
> +struct drm_colorop {
> + /** @dev: parent DRM device */
> + struct drm_device *dev;
> +
> + /**
> + * @head:
> + *
> + * List of all colorops on @dev, linked from &drm_mode_config.colorop_list.
> + * Invariant over the lifetime of @dev and therefore does not need
> + * locking.
> + */
> + struct list_head head;
> +
> + /**
> + * @index: Position inside the mode_config.list, can be used as an array
> + * index. It is invariant over the lifetime of the plane.
> + */
> + unsigned index;
> +
> + /* TODO do we need a separate mutex or will we tag along with the plane mutex? */
> +
> + /** @base base mode object*/
> + struct drm_mode_object base;
> +
> + /**
> + * @plane:
> + *
> + * The plane on which the colorop sits. A drm_colorop is always unique
> + * to a plane.
> + */
> + struct drm_plane *plane;
> +
> + /**
> + * @state:
> + *
> + * Current atomic state for this colorop.
> + *
> + * This is protected by @mutex. Note that nonblocking atomic commits
> + * access the current colorop state without taking locks. Either by
> + * going through the &struct drm_atomic_state pointers, see
> + * for_each_oldnew_plane_in_state(), for_each_old_plane_in_state() and
> + * for_each_new_plane_in_state(). Or through careful ordering of atomic
> + * commit operations as implemented in the atomic helpers, see
> + * &struct drm_crtc_commit.
> + *
> + * TODO keep, remove, or rewrite above plane references?
> + */
> + struct drm_colorop_state *state;
> +
> + /* colorop properties */
> +
> + /** @properties: property tracking for this plane */
> + struct drm_object_properties properties;
> +
> +};
> +
> +#define obj_to_colorop(x) container_of(x, struct drm_colorop, base)
> +
> +/**
> + * drm_crtc_find - look up a Colorop object from its ID
> + * @dev: DRM device
> + * @file_priv: drm file to check for lease against.
> + * @id: &drm_mode_object ID
> + *
> + * This can be used to look up a Colorop from its userspace ID. Only used by
> + * drivers for legacy IOCTLs and interface, nowadays extensions to the KMS
> + * userspace interface should be done using &drm_property.
> + */
> +static inline struct drm_colorop *drm_colorop_find(struct drm_device *dev,
> + struct drm_file *file_priv,
> + uint32_t id)
> +{
> + struct drm_mode_object *mo;
> + mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_COLOROP);
> + return mo ? obj_to_colorop(mo) : NULL;
> +}
> +
> +int drm_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
> + struct drm_plane *plane);
> +
> +struct drm_colorop_state *
> +drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop);
> +
> +void drm_colorop_atomic_destroy_state(struct drm_colorop *colorop,
> + struct drm_colorop_state *state);
> +void drm_colorop_destroy_state(struct drm_colorop *colorop,
> + struct drm_colorop_state *state);
> +void drm_colorop_reset(struct drm_colorop *colorop);
> +
> +/**
> + * drm_colorop_index - find the index of a registered colorop
> + * @colorop: colorop to find index for
> + *
> + * Given a registered colorop, return the index of that colorop within a DRM
> + * device's list of colorops.
> + */
> +static inline unsigned int drm_colorop_index(const struct drm_colorop *colorop)
> +{
> + return colorop->index;
> +}
> +
> +
> +#define drm_for_each_colorop(colorop, dev) \
> + list_for_each_entry(colorop, &(dev)->mode_config.colorop_list, head)
> +
> +
> +#endif /* __DRM_COLOROP_H__ */
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 973119a9176b..492b8c120c80 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -505,6 +505,24 @@ struct drm_mode_config {
> */
> struct list_head plane_list;
>
> + /**
> + * @num_colorop:
> + *
> + * Number of colorop objects on this device.
> + * This is invariant over the lifetime of a device and hence doesn't
> + * need any locks.
> + */
> + int num_colorop;
> +
> + /**
> + * @colorops_list:
> + *
> + * List of colorop objects linked with &drm_colorop.head. This is
> + * invariant over the lifetime of a device and hence doesn't need any
> + * locks.
> + */
> + struct list_head colorop_list;
> +
> /**
> * @num_crtc:
> *
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index 641fe298052d..9c8c1322f0a6 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -241,6 +241,8 @@ struct drm_plane_state {
> */
> enum drm_scaling_filter scaling_filter;
>
Missing kerneldocs for @color_pipeline.
> + struct drm_colorop *color_pipeline;
> +
> /**
> * @commit: Tracks the pending commit to prevent use-after-free conditions,
> * and for async plane updates.
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index 7040e7ea80c7..9e8f383935db 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -629,6 +629,7 @@ struct drm_mode_connector_set_property {
> #define DRM_MODE_OBJECT_FB 0xfbfbfbfb
> #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
> #define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
> +#define DRM_MODE_OBJECT_COLOROP 0xfafafafa
> #define DRM_MODE_OBJECT_ANY 0
>
> struct drm_mode_obj_get_properties {
> --
> 2.44.0
>
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