mirror of https://gitee.com/openkylin/linux.git
329 lines
7.9 KiB
C
329 lines
7.9 KiB
C
/* exynos_drm_fb.c
|
|
*
|
|
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
|
* Authors:
|
|
* Inki Dae <inki.dae@samsung.com>
|
|
* Joonyoung Shim <jy0922.shim@samsung.com>
|
|
* Seung-Woo Kim <sw0312.kim@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_fb_helper.h>
|
|
#include <uapi/drm/exynos_drm.h>
|
|
|
|
#include "exynos_drm_drv.h"
|
|
#include "exynos_drm_fb.h"
|
|
#include "exynos_drm_gem.h"
|
|
#include "exynos_drm_iommu.h"
|
|
#include "exynos_drm_encoder.h"
|
|
|
|
#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
|
|
|
|
/*
|
|
* exynos specific framebuffer structure.
|
|
*
|
|
* @fb: drm framebuffer obejct.
|
|
* @buf_cnt: a buffer count to drm framebuffer.
|
|
* @exynos_gem_obj: array of exynos specific gem object containing a gem object.
|
|
*/
|
|
struct exynos_drm_fb {
|
|
struct drm_framebuffer fb;
|
|
unsigned int buf_cnt;
|
|
struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
|
|
};
|
|
|
|
static int check_fb_gem_memory_type(struct drm_device *drm_dev,
|
|
struct exynos_drm_gem_obj *exynos_gem_obj)
|
|
{
|
|
unsigned int flags;
|
|
|
|
/*
|
|
* if exynos drm driver supports iommu then framebuffer can use
|
|
* all the buffer types.
|
|
*/
|
|
if (is_drm_iommu_supported(drm_dev))
|
|
return 0;
|
|
|
|
flags = exynos_gem_obj->flags;
|
|
|
|
/*
|
|
* without iommu support, not support physically non-continuous memory
|
|
* for framebuffer.
|
|
*/
|
|
if (IS_NONCONTIG_BUFFER(flags)) {
|
|
DRM_ERROR("cannot use this gem memory type for fb.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
|
|
unsigned int i;
|
|
|
|
/* make sure that overlay data are updated before relesing fb. */
|
|
exynos_drm_encoder_complete_scanout(fb);
|
|
|
|
drm_framebuffer_cleanup(fb);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
|
|
struct drm_gem_object *obj;
|
|
|
|
if (exynos_fb->exynos_gem_obj[i] == NULL)
|
|
continue;
|
|
|
|
obj = &exynos_fb->exynos_gem_obj[i]->base;
|
|
drm_gem_object_unreference_unlocked(obj);
|
|
}
|
|
|
|
kfree(exynos_fb);
|
|
exynos_fb = NULL;
|
|
}
|
|
|
|
static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
|
|
struct drm_file *file_priv,
|
|
unsigned int *handle)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
|
|
|
|
/* This fb should have only one gem object. */
|
|
if (WARN_ON(exynos_fb->buf_cnt != 1))
|
|
return -EINVAL;
|
|
|
|
return drm_gem_handle_create(file_priv,
|
|
&exynos_fb->exynos_gem_obj[0]->base, handle);
|
|
}
|
|
|
|
static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
|
|
struct drm_file *file_priv, unsigned flags,
|
|
unsigned color, struct drm_clip_rect *clips,
|
|
unsigned num_clips)
|
|
{
|
|
/* TODO */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
|
|
.destroy = exynos_drm_fb_destroy,
|
|
.create_handle = exynos_drm_fb_create_handle,
|
|
.dirty = exynos_drm_fb_dirty,
|
|
};
|
|
|
|
void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
|
|
unsigned int cnt)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb;
|
|
|
|
exynos_fb = to_exynos_fb(fb);
|
|
|
|
exynos_fb->buf_cnt = cnt;
|
|
}
|
|
|
|
unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb;
|
|
|
|
exynos_fb = to_exynos_fb(fb);
|
|
|
|
return exynos_fb->buf_cnt;
|
|
}
|
|
|
|
struct drm_framebuffer *
|
|
exynos_drm_framebuffer_init(struct drm_device *dev,
|
|
struct drm_mode_fb_cmd2 *mode_cmd,
|
|
struct drm_gem_object *obj)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb;
|
|
struct exynos_drm_gem_obj *exynos_gem_obj;
|
|
int ret;
|
|
|
|
exynos_gem_obj = to_exynos_gem_obj(obj);
|
|
|
|
ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
|
|
if (ret < 0) {
|
|
DRM_ERROR("cannot use this gem memory type for fb.\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
|
|
if (!exynos_fb) {
|
|
DRM_ERROR("failed to allocate exynos drm framebuffer\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
|
|
exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
|
|
|
|
ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
|
|
if (ret) {
|
|
DRM_ERROR("failed to initialize framebuffer\n");
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
return &exynos_fb->fb;
|
|
}
|
|
|
|
static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd)
|
|
{
|
|
unsigned int cnt = 0;
|
|
|
|
if (mode_cmd->pixel_format != DRM_FORMAT_NV12)
|
|
return drm_format_num_planes(mode_cmd->pixel_format);
|
|
|
|
while (cnt != MAX_FB_BUFFER) {
|
|
if (!mode_cmd->handles[cnt])
|
|
break;
|
|
cnt++;
|
|
}
|
|
|
|
/*
|
|
* check if NV12 or NV12M.
|
|
*
|
|
* NV12
|
|
* handles[0] = base1, offsets[0] = 0
|
|
* handles[1] = base1, offsets[1] = Y_size
|
|
*
|
|
* NV12M
|
|
* handles[0] = base1, offsets[0] = 0
|
|
* handles[1] = base2, offsets[1] = 0
|
|
*/
|
|
if (cnt == 2) {
|
|
/*
|
|
* in case of NV12 format, offsets[1] is not 0 and
|
|
* handles[0] is same as handles[1].
|
|
*/
|
|
if (mode_cmd->offsets[1] &&
|
|
mode_cmd->handles[0] == mode_cmd->handles[1])
|
|
cnt = 1;
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
|
|
static struct drm_framebuffer *
|
|
exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
|
|
struct drm_mode_fb_cmd2 *mode_cmd)
|
|
{
|
|
struct drm_gem_object *obj;
|
|
struct exynos_drm_gem_obj *exynos_gem_obj;
|
|
struct exynos_drm_fb *exynos_fb;
|
|
int i, ret;
|
|
|
|
exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
|
|
if (!exynos_fb) {
|
|
DRM_ERROR("failed to allocate exynos drm framebuffer\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
|
|
if (!obj) {
|
|
DRM_ERROR("failed to lookup gem object\n");
|
|
ret = -ENOENT;
|
|
goto err_free;
|
|
}
|
|
|
|
drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
|
|
exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
|
|
exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
|
|
|
|
DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
|
|
|
|
for (i = 1; i < exynos_fb->buf_cnt; i++) {
|
|
obj = drm_gem_object_lookup(dev, file_priv,
|
|
mode_cmd->handles[i]);
|
|
if (!obj) {
|
|
DRM_ERROR("failed to lookup gem object\n");
|
|
ret = -ENOENT;
|
|
exynos_fb->buf_cnt = i;
|
|
goto err_unreference;
|
|
}
|
|
|
|
exynos_gem_obj = to_exynos_gem_obj(obj);
|
|
exynos_fb->exynos_gem_obj[i] = exynos_gem_obj;
|
|
|
|
ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
|
|
if (ret < 0) {
|
|
DRM_ERROR("cannot use this gem memory type for fb.\n");
|
|
goto err_unreference;
|
|
}
|
|
}
|
|
|
|
ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
|
|
if (ret) {
|
|
DRM_ERROR("failed to init framebuffer.\n");
|
|
goto err_unreference;
|
|
}
|
|
|
|
return &exynos_fb->fb;
|
|
|
|
err_unreference:
|
|
for (i = 0; i < exynos_fb->buf_cnt; i++) {
|
|
struct drm_gem_object *obj;
|
|
|
|
obj = &exynos_fb->exynos_gem_obj[i]->base;
|
|
if (obj)
|
|
drm_gem_object_unreference_unlocked(obj);
|
|
}
|
|
err_free:
|
|
kfree(exynos_fb);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
|
|
int index)
|
|
{
|
|
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
|
|
struct exynos_drm_gem_buf *buffer;
|
|
|
|
if (index >= MAX_FB_BUFFER)
|
|
return NULL;
|
|
|
|
buffer = exynos_fb->exynos_gem_obj[index]->buffer;
|
|
if (!buffer)
|
|
return NULL;
|
|
|
|
DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
static void exynos_drm_output_poll_changed(struct drm_device *dev)
|
|
{
|
|
struct exynos_drm_private *private = dev->dev_private;
|
|
struct drm_fb_helper *fb_helper = private->fb_helper;
|
|
|
|
if (fb_helper)
|
|
drm_fb_helper_hotplug_event(fb_helper);
|
|
}
|
|
|
|
static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
|
|
.fb_create = exynos_user_fb_create,
|
|
.output_poll_changed = exynos_drm_output_poll_changed,
|
|
};
|
|
|
|
void exynos_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 = &exynos_drm_mode_config_funcs;
|
|
}
|