Files
kernel-zhihe-a210/drivers/gpu/drm/verisilicon/vs_fb.c
2025-12-18 14:27:13 +08:00

245 lines
6.8 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
*/
#include <linux/module.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
#include <drm/drm_framebuffer.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 5, 0)
#include <drm/drm_fourcc.h>
#else
#include <drm/drmP.h>
#endif
#include <drm/drm_gem.h>
#include <drm/drm_crtc.h>
#include <drm/drm_connector.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include "vs_fb.h"
#include "vs_gem.h"
#define fourcc_mod_vs_get_type(val) \
(((val) & DRM_FORMAT_MOD_VS_TYPE_MASK) >> 54)
static struct drm_framebuffer_funcs vs_fb_funcs = {
.create_handle = drm_gem_fb_create_handle,
.destroy = drm_gem_fb_destroy,
};
static struct drm_framebuffer *
vs_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
struct vs_gem_object **obj, unsigned int num_planes)
{
struct drm_framebuffer *fb;
int ret, i;
fb = kzalloc(sizeof(*fb), GFP_KERNEL);
if (!fb)
return ERR_PTR(-ENOMEM);
drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
for (i = 0; i < num_planes; i++)
fb->obj[i] = &obj[i]->base;
ret = drm_framebuffer_init(dev, fb, &vs_fb_funcs);
if (ret) {
dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
ret);
kfree(fb);
return ERR_PTR(ret);
}
return fb;
}
static struct drm_framebuffer *vs_fb_create(struct drm_device *dev,
struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_framebuffer *fb;
const struct drm_format_info *info;
struct vs_gem_object *objs[MAX_NUM_PLANES];
struct drm_gem_object *obj;
unsigned int height, size;
unsigned char i, num_planes;
int ret = 0;
info = drm_get_format_info(dev, mode_cmd);
if (!info)
return ERR_PTR(-EINVAL);
num_planes = info->num_planes;
if (num_planes > MAX_NUM_PLANES)
return ERR_PTR(-EINVAL);
for (i = 0; i < num_planes; i++) {
obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
if (!obj) {
dev_err(dev->dev, "Failed to lookup GEM object.\n");
ret = -ENXIO;
goto err;
}
height = drm_format_info_plane_height(info,
mode_cmd->height, i);
size = height * mode_cmd->pitches[i] + mode_cmd->offsets[i];
if (obj->size < size) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 9, 0)
drm_gem_object_put(obj);
#else
drm_gem_object_put_unlocked(obj);
#endif
ret = -EINVAL;
goto err;
}
objs[i] = to_vs_gem_object(obj);
}
fb = vs_fb_alloc(dev, mode_cmd, objs, i);
if (IS_ERR(fb)) {
ret = PTR_ERR(fb);
goto err;
}
return fb;
err:
for (; i > 0; i--)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 9, 0)
drm_gem_object_put(&objs[i-1]->base);
#else
drm_gem_object_put_unlocked(&objs[i-1]->base);
#endif
return ERR_PTR(ret);
}
struct vs_gem_object *vs_fb_get_gem_obj(struct drm_framebuffer *fb,
unsigned char plane)
{
if (plane > MAX_NUM_PLANES)
return NULL;
return to_vs_gem_object(fb->obj[plane]);
}
static const struct drm_format_info vs_formats[] = {
{.format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .char_per_block = { 20, 40, 0 },
.block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },.hsub = 2, .vsub = 2, .is_yuv = true},
{.format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .char_per_block = { 20, 20, 20 },
.block_w = { 4, 4, 4 }, .block_h = { 4, 4, 4 },.hsub = 1, .vsub = 1, .is_yuv = true},
};
static const struct drm_format_info *
vs_lookup_format_info(const struct drm_format_info formats[],
int num_formats, u32 format)
{
int i;
for (i = 0; i < num_formats; i++) {
if (formats[i].format == format)
return &formats[i];
}
return NULL;
}
static const struct drm_format_info *
vs_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
{
if (fourcc_mod_vs_get_type(cmd->modifier[0]) ==
DRM_FORMAT_MOD_VS_TYPE_CUSTOM_10BIT)
return vs_lookup_format_info(vs_formats, ARRAY_SIZE(vs_formats),
cmd->pixel_format);
else
return NULL;
}
static int vs_drm_atomic_check(struct drm_device *dev,
struct drm_atomic_state *state)
{
#ifdef CONFIG_ZHIHE_AUXDISP
struct drm_connector *connector;
struct drm_connector_state *old_conn_state, *new_conn_state;
int i;
for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
struct drm_crtc *old_crtc = old_conn_state->crtc;
struct drm_crtc *new_crtc = new_conn_state->crtc;
struct drm_crtc_state *old_crtc_state;
struct drm_connector *conn2;
struct drm_connector_state *conn2_state;
bool has_other_connectors;
int j;
if (!old_crtc || !new_crtc || old_crtc == new_crtc)
continue;
old_crtc_state = drm_atomic_get_crtc_state(state, old_crtc);
if (IS_ERR(old_crtc_state))
return PTR_ERR(old_crtc_state);
has_other_connectors = false;
for_each_new_connector_in_state(state, conn2, conn2_state, j) {
if (conn2 == connector)
continue;
if (conn2_state->crtc == old_crtc) {
has_other_connectors = true;
break;
}
}
if (!has_other_connectors) {
old_crtc_state->enable = false;
old_crtc_state->active = false;
}
}
#endif
return drm_atomic_helper_check(dev, state);
}
static const struct drm_mode_config_funcs vs_mode_config_funcs = {
.fb_create = vs_fb_create,
.get_format_info = vs_get_format_info,
.atomic_check = vs_drm_atomic_check,
.atomic_commit = drm_atomic_helper_commit,
};
static struct drm_mode_config_helper_funcs vs_mode_config_helpers = {
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
void vs_mode_config_init(struct drm_device *dev)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
dev->mode_config.fb_modifiers_not_supported = false;
#else
dev->mode_config.allow_fb_modifiers = true;
#endif
if (dev->mode_config.max_width == 0 ||
dev->mode_config.max_height == 0) {
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
dev->mode_config.max_width = 4096;
dev->mode_config.max_height = 4096;
}
dev->mode_config.funcs = &vs_mode_config_funcs;
dev->mode_config.helper_private = &vs_mode_config_helpers;
}