blob: 3b8f652698f828574c19f624264e816ab1299ee9 [file] [log] [blame]
/*
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
* Author:Mark Yao <mark.yao@rock-chips.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <drm/drm.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"
#define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
struct rockchip_drm_fb {
struct drm_framebuffer fb;
struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER];
};
struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb,
unsigned int plane)
{
struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb);
if (plane >= ROCKCHIP_MAX_FB_BUFFER)
return NULL;
return rk_fb->obj[plane];
}
static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb)
{
struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
struct drm_gem_object *obj;
int i;
for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) {
obj = rockchip_fb->obj[i];
if (obj)
drm_gem_object_unreference_unlocked(obj);
}
drm_framebuffer_cleanup(fb);
kfree(rockchip_fb);
}
static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned int *handle)
{
struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
return drm_gem_handle_create(file_priv,
rockchip_fb->obj[0], handle);
}
static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
.destroy = rockchip_drm_fb_destroy,
.create_handle = rockchip_drm_fb_create_handle,
};
static struct rockchip_drm_fb *
rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **obj, unsigned int num_planes)
{
struct rockchip_drm_fb *rockchip_fb;
int ret;
int i;
rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL);
if (!rockchip_fb)
return ERR_PTR(-ENOMEM);
drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd);
for (i = 0; i < num_planes; i++)
rockchip_fb->obj[i] = obj[i];
ret = drm_framebuffer_init(dev, &rockchip_fb->fb,
&rockchip_drm_fb_funcs);
if (ret) {
dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
ret);
kfree(rockchip_fb);
return ERR_PTR(ret);
}
return rockchip_fb;
}
static struct drm_framebuffer *
rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct rockchip_drm_fb *rockchip_fb;
struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
struct drm_gem_object *obj;
unsigned int hsub;
unsigned int vsub;
int num_planes;
int ret;
int i;
hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
num_planes = min(drm_format_num_planes(mode_cmd->pixel_format),
ROCKCHIP_MAX_FB_BUFFER);
for (i = 0; i < num_planes; i++) {
unsigned int width = mode_cmd->width / (i ? hsub : 1);
unsigned int height = mode_cmd->height / (i ? vsub : 1);
unsigned int min_size;
obj = drm_gem_object_lookup(dev, file_priv,
mode_cmd->handles[i]);
if (!obj) {
dev_err(dev->dev, "Failed to lookup GEM object\n");
ret = -ENXIO;
goto err_gem_object_unreference;
}
min_size = (height - 1) * mode_cmd->pitches[i] +
mode_cmd->offsets[i] +
width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
if (obj->size < min_size) {
drm_gem_object_unreference_unlocked(obj);
ret = -EINVAL;
goto err_gem_object_unreference;
}
objs[i] = obj;
}
rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
if (IS_ERR(rockchip_fb)) {
ret = PTR_ERR(rockchip_fb);
goto err_gem_object_unreference;
}
return &rockchip_fb->fb;
err_gem_object_unreference:
for (i--; i >= 0; i--)
drm_gem_object_unreference_unlocked(objs[i]);
return ERR_PTR(ret);
}
static void rockchip_drm_output_poll_changed(struct drm_device *dev)
{
struct rockchip_drm_private *private = dev->dev_private;
struct drm_fb_helper *fb_helper = &private->fbdev_helper;
if (fb_helper)
drm_fb_helper_hotplug_event(fb_helper);
}
static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc)
{
struct rockchip_drm_private *priv = crtc->dev->dev_private;
int pipe = drm_crtc_index(crtc);
const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe];
if (crtc_funcs && crtc_funcs->wait_for_update)
crtc_funcs->wait_for_update(crtc);
}
/*
* We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066
* have hardware counters for neither vblanks nor scanlines, which results in
* a race where:
* | <-- HW vsync irq and reg take effect
* plane_commit --> |
* get_vblank and wait --> |
* | <-- handle_vblank, vblank->count + 1
* cleanup_fb --> |
* iommu crash --> |
* | <-- HW vsync irq and reg take effect
*
* This function is equivalent but uses rockchip_crtc_wait_for_update() instead
* of waiting for vblank_count to change.
*/
static void
rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state)
{
struct drm_crtc_state *old_crtc_state;
struct drm_crtc *crtc;
int i, ret;
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
/* No one cares about the old state, so abuse it for tracking
* and store whether we hold a vblank reference (and should do a
* vblank wait) in the ->enable boolean.
*/
old_crtc_state->enable = false;
if (!crtc->state->active)
continue;
if (!drm_atomic_helper_framebuffer_changed(dev,
old_state, crtc))
continue;
ret = drm_crtc_vblank_get(crtc);
if (ret != 0)
continue;
old_crtc_state->enable = true;
}
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
if (!old_crtc_state->enable)
continue;
rockchip_crtc_wait_for_update(crtc);
drm_crtc_vblank_put(crtc);
}
}
static void
rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit)
{
struct drm_atomic_state *state = commit->state;
struct drm_device *dev = commit->dev;
/*
* TODO: do fence wait here.
*/
/*
* Rockchip crtc support runtime PM, can't update display planes
* when crtc is disabled.
*
* drm_atomic_helper_commit comments detail that:
* For drivers supporting runtime PM the recommended sequence is
*
* drm_atomic_helper_commit_modeset_disables(dev, state);
*
* drm_atomic_helper_commit_modeset_enables(dev, state);
*
* drm_atomic_helper_commit_planes(dev, state, true);
*
* See the kerneldoc entries for these three functions for more details.
*/
drm_atomic_helper_commit_modeset_disables(dev, state);
drm_atomic_helper_commit_modeset_enables(dev, state);
drm_atomic_helper_commit_planes(dev, state, true);
rockchip_atomic_wait_for_complete(dev, state);
drm_atomic_helper_cleanup_planes(dev, state);
drm_atomic_state_free(state);
}
void rockchip_drm_atomic_work(struct work_struct *work)
{
struct rockchip_atomic_commit *commit = container_of(work,
struct rockchip_atomic_commit, work);
rockchip_atomic_commit_complete(commit);
}
int rockchip_drm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool async)
{
struct rockchip_drm_private *private = dev->dev_private;
struct rockchip_atomic_commit *commit = &private->commit;
int ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
/* serialize outstanding asynchronous commits */
mutex_lock(&commit->lock);
flush_work(&commit->work);
drm_atomic_helper_swap_state(dev, state);
commit->dev = dev;
commit->state = state;
if (async)
schedule_work(&commit->work);
else
rockchip_atomic_commit_complete(commit);
mutex_unlock(&commit->lock);
return 0;
}
static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
.fb_create = rockchip_user_fb_create,
.output_poll_changed = rockchip_drm_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = rockchip_drm_atomic_commit,
};
struct drm_framebuffer *
rockchip_drm_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj)
{
struct rockchip_drm_fb *rockchip_fb;
rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
if (IS_ERR(rockchip_fb))
return NULL;
return &rockchip_fb->fb;
}
void rockchip_drm_mode_config_init(struct drm_device *dev)
{
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
/*
* set max width and height as default value(4096x4096).
* this value would be used to check framebuffer size limitation
* at drm_mode_addfb().
*/
dev->mode_config.max_width = 4096;
dev->mode_config.max_height = 4096;
dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
}