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*
* 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>
*
* 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 (including the next
* paragraph) 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
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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.
*/
#include "drmP.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "drm_fb_helper.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_buf.h"
#include "exynos_drm_gem.h"
#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
/*
* exynos specific framebuffer structure.
*
* @fb: drm framebuffer obejct.
* @exynos_gem_obj: exynos specific gem object containing a gem object.
* @buffer: pointer to exynos_drm_gem_buffer object.
* - contain the memory information to memory region allocated
* at default framebuffer creation.
*/
struct exynos_drm_fb {
struct drm_framebuffer fb;
struct exynos_drm_gem_obj *exynos_gem_obj;
struct exynos_drm_gem_buf *buffer;
};
static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
{
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
DRM_DEBUG_KMS("%s\n", __FILE__);
drm_framebuffer_cleanup(fb);
/*
* default framebuffer has no gem object so
* a buffer of the default framebuffer should be released at here.
*/
if (!exynos_fb->exynos_gem_obj && exynos_fb->buffer)
exynos_drm_buf_destroy(fb->dev, exynos_fb->buffer);
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);
DRM_DEBUG_KMS("%s\n", __FILE__);
return drm_gem_handle_create(file_priv,
&exynos_fb->exynos_gem_obj->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)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
/* 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,
};
static struct drm_framebuffer *
exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev,
struct drm_mode_fb_cmd *mode_cmd)
{
struct exynos_drm_fb *exynos_fb;
struct drm_framebuffer *fb;
struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
struct drm_gem_object *obj;
unsigned int size;
int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
mode_cmd->pitch = max(mode_cmd->pitch,
mode_cmd->width * (mode_cmd->bpp >> 3));
DRM_LOG_KMS("drm fb create(%dx%d)\n",
mode_cmd->width, mode_cmd->height);
exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
if (!exynos_fb) {
DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
return ERR_PTR(-ENOMEM);
}
fb = &exynos_fb->fb;
ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
if (ret) {
DRM_ERROR("failed to initialize framebuffer.\n");
goto err_init;
}
DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);
size = mode_cmd->pitch * mode_cmd->height;
/*
* mode_cmd->handle could be NULL at booting time or
* with user request. if NULL, a new buffer or a gem object
* would be allocated.
*/
if (!mode_cmd->handle) {
if (!file_priv) {
struct exynos_drm_gem_buf *buffer;
/*
* in case that file_priv is NULL, it allocates
* only buffer and this buffer would be used
* for default framebuffer.
*/
buffer = exynos_drm_buf_create(dev, size);
if (IS_ERR(buffer)) {
ret = PTR_ERR(buffer);
goto err_buffer;
}
exynos_fb->buffer = buffer;
DRM_LOG_KMS("default: dma_addr = 0x%lx, size = 0x%x\n",
(unsigned long)buffer->dma_addr, size);
goto out;
} else {
exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
&mode_cmd->handle,
size);
if (IS_ERR(exynos_gem_obj)) {
ret = PTR_ERR(exynos_gem_obj);
goto err_buffer;
}
}
} else {
obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object.\n");
goto err_buffer;
}
exynos_gem_obj = to_exynos_gem_obj(obj);
drm_gem_object_unreference_unlocked(obj);
}
/*
* if got a exynos_gem_obj from either a handle or
* a new creation then exynos_fb->exynos_gem_obj is NULL
* so that default framebuffer has no its own gem object,
* only its own buffer object.
*/
exynos_fb->buffer = exynos_gem_obj->buffer;
DRM_LOG_KMS("dma_addr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
(unsigned long)exynos_fb->buffer->dma_addr, size,
(unsigned int)&exynos_gem_obj->base);
out:
exynos_fb->exynos_gem_obj = exynos_gem_obj;
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
return fb;
err_buffer:
drm_framebuffer_cleanup(fb);
err_init:
kfree(exynos_fb);
return ERR_PTR(ret);
}
struct drm_framebuffer *exynos_drm_fb_create(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_mode_fb_cmd *mode_cmd)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
return exynos_drm_fb_init(file_priv, dev, mode_cmd);
}
struct exynos_drm_gem_buf *exynos_drm_fb_get_buf(struct drm_framebuffer *fb)
{
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
struct exynos_drm_gem_buf *buffer;
DRM_DEBUG_KMS("%s\n", __FILE__);
buffer = exynos_fb->buffer;
if (!buffer)
return NULL;
DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
(unsigned long)buffer->kvaddr,
(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 struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
.fb_create = exynos_drm_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;
}
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
MODULE_LICENSE("GPL");
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