[PATCH 7/9] drm/verisilicon: Add drm plane funcs
Thomas Zimmermann
tzimmermann at suse.de
Fri Jun 30 12:14:57 UTC 2023
Am 02.06.23 um 09:40 schrieb Keith Zhao:
> Implement plane functions for the DRM driver.
>
> Signed-off-by: Keith Zhao <keith.zhao at starfivetech.com>
> ---
> drivers/gpu/drm/verisilicon/Makefile | 3 +-
> drivers/gpu/drm/verisilicon/vs_plane.c | 440 +++++++++++++++++++++++++
> drivers/gpu/drm/verisilicon/vs_plane.h | 74 +++++
> 3 files changed, 516 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.c
> create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.h
>
> diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
> index bae5fbab9bbb..d96ad9399fc7 100644
> --- a/drivers/gpu/drm/verisilicon/Makefile
> +++ b/drivers/gpu/drm/verisilicon/Makefile
> @@ -3,7 +3,8 @@
> vs_drm-objs := vs_drv.o \
> vs_crtc.o \
> vs_fb.o \
> - vs_gem.o
> + vs_gem.o \
> + vs_plane.o
>
> obj-$(CONFIG_DRM_VERISILICON) += vs_drm.o
>
> diff --git a/drivers/gpu/drm/verisilicon/vs_plane.c b/drivers/gpu/drm/verisilicon/vs_plane.c
> new file mode 100644
> index 000000000000..7b0dcef232ae
> --- /dev/null
> +++ b/drivers/gpu/drm/verisilicon/vs_plane.c
> @@ -0,0 +1,440 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
> + */
> +
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_blend.h>
> +#include <drm/drm_gem_dma_helper.h>
> +#include <drm/drm_fb_dma_helper.h>
> +#include <drm/drm_framebuffer.h>
> +#include <drm/drm_plane_helper.h>
> +
> +#include <drm/vs_drm.h>
> +
> +#include "vs_crtc.h"
> +#include "vs_fb.h"
> +#include "vs_gem.h"
> +#include "vs_plane.h"
> +#include "vs_type.h"
> +
> +void vs_plane_destory(struct drm_plane *plane)
'_destroy'
> +{
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> +
> + drm_plane_cleanup(plane);
> + kfree(vs_plane);
> +}
I think we have helpers to do the cleanup.
As I mentioned in another review, you should switch to managed code
instead of using your own memory management. If your modesetting
pipeline is static, you can use drmm_mode_config_init() and it will
release all pipeline structs for you. The related memory can allowed as
part of the device instance. If the pipeline is dynamic, you can use
drmm_ helpers to allocate conenctors, crtcs, planes, etc. IIRC, the vc4
driver does something like that.
> +
> +static void vs_plane_reset(struct drm_plane *plane)
> +{
> + struct vs_plane_state *state;
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> +
> + if (plane->state) {
> + __drm_atomic_helper_plane_destroy_state(plane->state);
> +
> + state = to_vs_plane_state(plane->state);
> + kfree(state);
> + plane->state = NULL;
> + }
> +
> + state = kzalloc(sizeof(*state), GFP_KERNEL);
> + if (!state)
> + return;
> +
> + __drm_atomic_helper_plane_reset(plane, &state->base);
> +
> + state->degamma = VS_DEGAMMA_DISABLE;
> + state->degamma_changed = false;
> + state->base.zpos = vs_plane->id;
> +
> + memset(&state->status, 0, sizeof(state->status));
Should already be 0 from kzalloc().
> +}
> +
> +static void _vs_plane_duplicate_blob(struct vs_plane_state *state,
> + struct vs_plane_state *ori_state)
> +{
> + state->watermark = ori_state->watermark;
> + state->color_mgmt = ori_state->color_mgmt;
> + state->roi = ori_state->roi;
> +
> + if (state->watermark)
> + drm_property_blob_get(state->watermark);
> + if (state->color_mgmt)
> + drm_property_blob_get(state->color_mgmt);
> + if (state->roi)
> + drm_property_blob_get(state->roi);
> +}
> +
> +static int
> +_vs_plane_set_property_blob_from_id(struct drm_device *dev,
> + struct drm_property_blob **blob,
> + u64 blob_id,
> + size_t expected_size)
> +{
> + struct drm_property_blob *new_blob = NULL;
> +
> + if (blob_id) {
> + new_blob = drm_property_lookup_blob(dev, blob_id);
> + if (!new_blob)
> + return -EINVAL;
> +
> + if (new_blob->length != expected_size) {
> + drm_property_blob_put(new_blob);
> + return -EINVAL;
> + }
> + }
> +
> + drm_property_replace_blob(blob, new_blob);
> + drm_property_blob_put(new_blob);
> +
> + return 0;
> +}
> +
> +static struct drm_plane_state *
> +vs_plane_atomic_duplicate_state(struct drm_plane *plane)
> +{
> + struct vs_plane_state *ori_state;
> + struct vs_plane_state *state;
> +
> + if (WARN_ON(!plane->state))
> + return NULL;
> +
> + ori_state = to_vs_plane_state(plane->state);
> + state = kzalloc(sizeof(*state), GFP_KERNEL);
> + if (!state)
> + return NULL;
> +
> + __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
> +
> + state->degamma = ori_state->degamma;
> + state->degamma_changed = ori_state->degamma_changed;
> +
> + _vs_plane_duplicate_blob(state, ori_state);
> + memcpy(&state->status, &ori_state->status, sizeof(ori_state->status));
> +
> + return &state->base;
> +}
> +
> +static void vs_plane_atomic_destroy_state(struct drm_plane *plane,
> + struct drm_plane_state *state)
> +{
> + struct vs_plane_state *vs_plane_state = to_vs_plane_state(state);
> +
> + __drm_atomic_helper_plane_destroy_state(state);
> +
> + drm_property_blob_put(vs_plane_state->watermark);
> + drm_property_blob_put(vs_plane_state->color_mgmt);
> + drm_property_blob_put(vs_plane_state->roi);
> + kfree(vs_plane_state);
> +}
> +
> +static int vs_plane_atomic_set_property(struct drm_plane *plane,
> + struct drm_plane_state *state,
> + struct drm_property *property,
> + uint64_t val)
> +{
> + struct drm_device *dev = plane->dev;
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> + struct vs_plane_state *vs_plane_state = to_vs_plane_state(state);
> + int ret = 0;
> +
> + if (property == vs_plane->degamma_mode) {
> + if (vs_plane_state->degamma != val) {
> + vs_plane_state->degamma = val;
> + vs_plane_state->degamma_changed = true;
> + } else {
> + vs_plane_state->degamma_changed = false;
> + }
> + } else if (property == vs_plane->watermark_prop) {
> + ret = _vs_plane_set_property_blob_from_id(dev,
> + &vs_plane_state->watermark,
> + val,
> + sizeof(struct drm_vs_watermark));
> + return ret;
> + } else if (property == vs_plane->color_mgmt_prop) {
> + ret = _vs_plane_set_property_blob_from_id(dev,
> + &vs_plane_state->color_mgmt,
> + val,
> + sizeof(struct drm_vs_color_mgmt));
> + return ret;
> + } else if (property == vs_plane->roi_prop) {
> + ret = _vs_plane_set_property_blob_from_id(dev,
> + &vs_plane_state->roi,
> + val,
> + sizeof(struct drm_vs_roi));
> + return ret;
> + } else {
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int vs_plane_atomic_get_property(struct drm_plane *plane,
> + const struct drm_plane_state *state,
> + struct drm_property *property,
> + uint64_t *val)
> +{
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> + const struct vs_plane_state *vs_plane_state =
> + container_of(state, const struct vs_plane_state, base);
> +
> + if (property == vs_plane->degamma_mode)
> + *val = vs_plane_state->degamma;
> + else if (property == vs_plane->watermark_prop)
> + *val = (vs_plane_state->watermark) ?
> + vs_plane_state->watermark->base.id : 0;
> + else if (property == vs_plane->color_mgmt_prop)
> + *val = (vs_plane_state->color_mgmt) ?
> + vs_plane_state->color_mgmt->base.id : 0;
> + else if (property == vs_plane->roi_prop)
> + *val = (vs_plane_state->roi) ?
> + vs_plane_state->roi->base.id : 0;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static bool vs_format_mod_supported(struct drm_plane *plane,
> + u32 format,
> + u64 modifier)
> +{
> + int i;
> +
> + /* We always have to allow these modifiers:
Indention seems off.
> + * 1. Core DRM checks for LINEAR support if userspace does not provide modifiers.
> + * 2. Not passing any modifiers is the same as explicitly passing INVALID.
> + */
> + if (modifier == DRM_FORMAT_MOD_LINEAR)
> + return true;
> +
> + /* Check that the modifier is on the list of the plane's supported modifiers. */
> + for (i = 0; i < plane->modifier_count; i++) {
> + if (modifier == plane->modifiers[i])
> + break;
> + }
> +
> + if (i == plane->modifier_count)
> + return false;
> +
> + return true;
> +}
> +
> +const struct drm_plane_funcs vs_plane_funcs = {
> + .update_plane = drm_atomic_helper_update_plane,
> + .disable_plane = drm_atomic_helper_disable_plane,
> + .destroy = vs_plane_destory,
> + .reset = vs_plane_reset,
> + .atomic_duplicate_state = vs_plane_atomic_duplicate_state,
> + .atomic_destroy_state = vs_plane_atomic_destroy_state,
> + .atomic_set_property = vs_plane_atomic_set_property,
> + .atomic_get_property = vs_plane_atomic_get_property,
> + .format_mod_supported = vs_format_mod_supported,
> +};
> +
> +static unsigned char vs_get_plane_number(struct drm_framebuffer *fb)
> +{
> + const struct drm_format_info *info;
> +
> + if (!fb)
> + return 0;
> +
> + info = drm_format_info(fb->format->format);
> + if (!info || info->num_planes > MAX_NUM_PLANES)
> + return 0;
> +
> + return info->num_planes;
> +}
> +
> +static int vs_plane_atomic_check(struct drm_plane *plane,
> + struct drm_atomic_state *state)
> +{
> + struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
> + plane);
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> + struct drm_framebuffer *fb = new_plane_state->fb;
> + struct drm_crtc *crtc = new_plane_state->crtc;
> + struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
> +
> + if (!crtc || !fb)
> + return 0;
> +
> + //return vs_plane->funcs->check(vs_crtc->dev, vs_plane, new_plane_state);
> + return vs_plane->funcs->check(vs_crtc->dev, plane, state);
> +}
> +
> +static void vs_plane_atomic_update(struct drm_plane *plane,
> + struct drm_atomic_state *state)
> +{
> + struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
> + plane);
> + unsigned char i, num_planes;
> + struct drm_framebuffer *fb;
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> + //struct drm_plane_state *state = plane->state;
> + struct vs_crtc *vs_crtc = to_vs_crtc(new_state->crtc);
> + struct vs_plane_state *plane_state = to_vs_plane_state(new_state);
> + //struct drm_format_name_buf *name = &plane_state->status.format_name;
> +
> + if (!new_state->fb || !new_state->crtc)
> + return;
> +
> + fb = new_state->fb;
> +
> + num_planes = vs_get_plane_number(fb);
> +
> + for (i = 0; i < num_planes; i++) {
> + struct vs_gem_object *vs_obj;
> +
> + vs_obj = vs_fb_get_gem_obj(fb, i);
> + vs_plane->dma_addr[i] = vs_obj->iova + fb->offsets[i];
> + }
> +
> + plane_state->status.src = drm_plane_state_src(new_state);
> + plane_state->status.dest = drm_plane_state_dest(new_state);
> +
> + vs_plane->funcs->update(vs_crtc->dev, vs_plane, plane, state);
> +}
> +
> +static void vs_plane_atomic_disable(struct drm_plane *plane,
> + struct drm_atomic_state *state)
> +{
> + struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
> + plane);
> + struct vs_plane *vs_plane = to_vs_plane(plane);
> + struct vs_crtc *vs_crtc = to_vs_crtc(old_state->crtc);
> +
> + vs_plane->funcs->disable(vs_crtc->dev, vs_plane, old_state);
> +}
> +
> +const struct drm_plane_helper_funcs vs_plane_helper_funcs = {
> + .atomic_check = vs_plane_atomic_check,
> + .atomic_update = vs_plane_atomic_update,
> + .atomic_disable = vs_plane_atomic_disable,
> +};
> +
> +static const struct drm_prop_enum_list vs_degamma_mode_enum_list[] = {
> + { VS_DEGAMMA_DISABLE, "disabled" },
> + { VS_DEGAMMA_BT709, "preset degamma for BT709" },
> + { VS_DEGAMMA_BT2020, "preset degamma for BT2020" },
> +};
> +
> +struct vs_plane *vs_plane_create(struct drm_device *drm_dev,
> + struct vs_plane_info *info,
> + unsigned int layer_num,
> + unsigned int possible_crtcs)
> +{
> + struct vs_plane *plane;
> + int ret;
> +
> + if (!info)
> + return NULL;
> +
> + plane = kzalloc(sizeof(*plane), GFP_KERNEL);
> + if (!plane)
> + return NULL;
> +
> + ret = drm_universal_plane_init(drm_dev, &plane->base, possible_crtcs,
> + &vs_plane_funcs, info->formats,
> + info->num_formats, info->modifiers, info->type,
> + info->name ? info->name : NULL);
> + if (ret)
> + goto err_free_plane;
> +
> + drm_plane_helper_add(&plane->base, &vs_plane_helper_funcs);
> +
> + /* Set up the plane properties */
> + if (info->degamma_size) {
> + plane->degamma_mode =
> + drm_property_create_enum(drm_dev, 0,
> + "DEGAMMA_MODE",
> + vs_degamma_mode_enum_list,
> + ARRAY_SIZE(vs_degamma_mode_enum_list));
> +
> + if (!plane->degamma_mode)
> + goto error_cleanup_plane;
> +
> + drm_object_attach_property(&plane->base.base,
> + plane->degamma_mode,
> + VS_DEGAMMA_DISABLE);
> + }
> +
> + if (info->rotation) {
> + ret = drm_plane_create_rotation_property(&plane->base,
> + DRM_MODE_ROTATE_0,
> + info->rotation);
> + if (ret)
> + goto error_cleanup_plane;
> + }
> +
> + if (info->blend_mode) {
> + ret = drm_plane_create_blend_mode_property(&plane->base,
> + info->blend_mode);
> + if (ret)
> + goto error_cleanup_plane;
> + ret = drm_plane_create_alpha_property(&plane->base);
> + if (ret)
> + goto error_cleanup_plane;
> + }
> +
> + if (info->color_encoding) {
> + ret = drm_plane_create_color_properties(&plane->base,
> + info->color_encoding,
> + BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
> + DRM_COLOR_YCBCR_BT709,
> + DRM_COLOR_YCBCR_LIMITED_RANGE);
> + if (ret)
> + goto error_cleanup_plane;
> + }
> +
> + if (info->zpos != 255) {
> + ret = drm_plane_create_zpos_property(&plane->base, info->zpos, 0,
> + layer_num - 1);
> + if (ret)
> + goto error_cleanup_plane;
> + } else {
> + ret = drm_plane_create_zpos_immutable_property(&plane->base,
> + info->zpos);
> + if (ret)
> + goto error_cleanup_plane;
> + }
> +
> + if (info->watermark) {
> + plane->watermark_prop = drm_property_create(drm_dev, DRM_MODE_PROP_BLOB,
> + "WATERMARK", 0);
> + if (!plane->watermark_prop)
> + goto error_cleanup_plane;
> +
> + drm_object_attach_property(&plane->base.base, plane->watermark_prop, 0);
> + }
> +
> + if (info->color_mgmt) {
> + plane->color_mgmt_prop = drm_property_create(drm_dev, DRM_MODE_PROP_BLOB,
> + "COLOR_CONFIG", 0);
> + if (!plane->color_mgmt_prop)
> + goto error_cleanup_plane;
> +
> + drm_object_attach_property(&plane->base.base, plane->color_mgmt_prop, 0);
> + }
> +
> + if (info->roi) {
> + plane->roi_prop = drm_property_create(drm_dev, DRM_MODE_PROP_BLOB,
> + "ROI", 0);
> + if (!plane->roi_prop)
> + goto error_cleanup_plane;
> +
> + drm_object_attach_property(&plane->base.base, plane->roi_prop, 0);
> + }
> +
> + return plane;
> +
> +error_cleanup_plane:
> + drm_plane_cleanup(&plane->base);
> +err_free_plane:
> + kfree(plane);
> + return NULL;
> +}
> diff --git a/drivers/gpu/drm/verisilicon/vs_plane.h b/drivers/gpu/drm/verisilicon/vs_plane.h
> new file mode 100644
> index 000000000000..76ef3c3de045
> --- /dev/null
> +++ b/drivers/gpu/drm/verisilicon/vs_plane.h
> @@ -0,0 +1,74 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
> + */
> +
> +#ifndef __VS_PLANE_H__
> +#define __VS_PLANE_H__
> +
> +#include <drm/drm_fourcc.h>
> +#include <drm/drm_plane_helper.h>
> +
> +#include "vs_fb.h"
> +#include "vs_type.h"
> +
> +struct vs_plane;
> +
> +struct vs_plane_funcs {
> + void (*update)(struct device *dev, struct vs_plane *plane, struct drm_plane *drm_plane,
> + struct drm_atomic_state *state);
> + void (*disable)(struct device *dev, struct vs_plane *plane,
> + struct drm_plane_state *old_state);
> + int (*check)(struct device *dev, struct drm_plane *plane,
> + struct drm_atomic_state *state);
> +};
Your own internal API. Exactly the same problems as in the CRTC case.
> +
> +struct vs_plane_status {
> + u32 tile_mode;
> + struct drm_rect src;
> + struct drm_rect dest;
> +};
> +
> +struct vs_plane_state {
> + struct drm_plane_state base;
> + struct vs_plane_status status; /* for debugfs */
> +
> + struct drm_property_blob *watermark;
> + struct drm_property_blob *color_mgmt;
> + struct drm_property_blob *roi;
> +
> + u32 degamma;
> + bool degamma_changed;
> +};
> +
> +struct vs_plane {
> + struct drm_plane base;
> + u8 id;
I'm not sure what this is for. It's used for zpos. If that's the
purpose, I'd rather call it default_zpos.
Best regards
Thomas
> + dma_addr_t dma_addr[MAX_NUM_PLANES];
> +
> + struct drm_property *degamma_mode;
> + struct drm_property *watermark_prop;
> + struct drm_property *color_mgmt_prop;
> + struct drm_property *roi_prop;
> +
> + const struct vs_plane_funcs *funcs;
> +};
> +
> +void vs_plane_destory(struct drm_plane *plane);
> +
> +struct vs_plane *vs_plane_create(struct drm_device *drm_dev,
> + struct vs_plane_info *info,
> + unsigned int layer_num,
> + unsigned int possible_crtcs);
> +
> +static inline struct vs_plane *to_vs_plane(struct drm_plane *plane)
> +{
> + return container_of(plane, struct vs_plane, base);
> +}
> +
> +static inline struct vs_plane_state *
> +to_vs_plane_state(struct drm_plane_state *state)
> +{
> + return container_of(state, struct vs_plane_state, base);
> +}
> +#endif /* __VS_PLANE_H__ */
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
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