linux/drivers/gpu/drm/exynos/exynos_drm_fbdev.c

469 lines
12 KiB
C

/* exynos_drm_fbdev.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>
*
* 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_fb_helper.h"
#include "drm_crtc_helper.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_buf.h"
#define MAX_CONNECTOR 4
#define PREFERRED_BPP 32
#define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
drm_fb_helper)
struct exynos_drm_fbdev {
struct drm_fb_helper drm_fb_helper;
struct drm_framebuffer *fb;
};
static int exynos_drm_fbdev_set_par(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
switch (var->bits_per_pixel) {
case 32:
case 24:
case 18:
case 16:
case 12:
info->fix.visual = FB_VISUAL_TRUECOLOR;
break;
case 1:
info->fix.visual = FB_VISUAL_MONO01;
break;
default:
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
break;
}
info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
return drm_fb_helper_set_par(info);
}
static struct fb_ops exynos_drm_fb_ops = {
.owner = THIS_MODULE,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = exynos_drm_fbdev_set_par,
.fb_blank = drm_fb_helper_blank,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_setcmap = drm_fb_helper_setcmap,
};
static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
struct drm_framebuffer *fb)
{
struct fb_info *fbi = helper->fbdev;
struct drm_device *dev = helper->dev;
struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper);
struct exynos_drm_gem_buf *buffer;
unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3);
unsigned long offset;
DRM_DEBUG_KMS("%s\n", __FILE__);
exynos_fb->fb = fb;
drm_fb_helper_fill_fix(fbi, fb->pitch, fb->depth);
drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height);
buffer = exynos_drm_fb_get_buf(fb);
if (!buffer) {
DRM_LOG_KMS("buffer is null.\n");
return -EFAULT;
}
offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3);
offset += fbi->var.yoffset * fb->pitch;
dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr;
fbi->screen_base = buffer->kvaddr + offset;
fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset);
fbi->screen_size = size;
fbi->fix.smem_len = size;
return 0;
}
static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
struct drm_device *dev = helper->dev;
struct fb_info *fbi;
struct drm_mode_fb_cmd mode_cmd = { 0 };
struct platform_device *pdev = dev->platformdev;
int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
sizes->surface_width, sizes->surface_height,
sizes->surface_bpp);
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.bpp = sizes->surface_bpp;
mode_cmd.depth = sizes->surface_depth;
mutex_lock(&dev->struct_mutex);
fbi = framebuffer_alloc(0, &pdev->dev);
if (!fbi) {
DRM_ERROR("failed to allocate fb info.\n");
ret = -ENOMEM;
goto out;
}
exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
if (IS_ERR_OR_NULL(exynos_fbdev->fb)) {
DRM_ERROR("failed to create drm framebuffer.\n");
ret = PTR_ERR(exynos_fbdev->fb);
goto out;
}
helper->fb = exynos_fbdev->fb;
helper->fbdev = fbi;
fbi->par = helper;
fbi->flags = FBINFO_FLAG_DEFAULT;
fbi->fbops = &exynos_drm_fb_ops;
ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
if (ret) {
DRM_ERROR("failed to allocate cmap.\n");
goto out;
}
ret = exynos_drm_fbdev_update(helper, helper->fb);
if (ret < 0)
fb_dealloc_cmap(&fbi->cmap);
/*
* if failed, all resources allocated above would be released by
* drm_mode_config_cleanup() when drm_load() had been called prior
* to any specific driver such as fimd or hdmi driver.
*/
out:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static bool
exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb,
struct drm_fb_helper_surface_size *sizes)
{
if (fb->width != sizes->surface_width)
return false;
if (fb->height != sizes->surface_height)
return false;
if (fb->bits_per_pixel != sizes->surface_bpp)
return false;
if (fb->depth != sizes->surface_depth)
return false;
return true;
}
static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_device *dev = helper->dev;
struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
struct drm_framebuffer *fb = exynos_fbdev->fb;
struct drm_mode_fb_cmd mode_cmd = { 0 };
DRM_DEBUG_KMS("%s\n", __FILE__);
if (helper->fb != fb) {
DRM_ERROR("drm framebuffer is different\n");
return -EINVAL;
}
if (exynos_drm_fbdev_is_samefb(fb, sizes))
return 0;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.bpp = sizes->surface_bpp;
mode_cmd.depth = sizes->surface_depth;
if (fb->funcs->destroy)
fb->funcs->destroy(fb);
exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
if (IS_ERR(exynos_fbdev->fb)) {
DRM_ERROR("failed to allocate fb.\n");
return PTR_ERR(exynos_fbdev->fb);
}
helper->fb = exynos_fbdev->fb;
return exynos_drm_fbdev_update(helper, helper->fb);
}
static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
int ret = 0;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (!helper->fb) {
ret = exynos_drm_fbdev_create(helper, sizes);
if (ret < 0) {
DRM_ERROR("failed to create fbdev.\n");
return ret;
}
/*
* fb_helper expects a value more than 1 if succeed
* because register_framebuffer() should be called.
*/
ret = 1;
} else {
ret = exynos_drm_fbdev_recreate(helper, sizes);
if (ret < 0) {
DRM_ERROR("failed to reconfigure fbdev\n");
return ret;
}
}
return ret;
}
static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
.fb_probe = exynos_drm_fbdev_probe,
};
int exynos_drm_fbdev_init(struct drm_device *dev)
{
struct exynos_drm_fbdev *fbdev;
struct exynos_drm_private *private = dev->dev_private;
struct drm_fb_helper *helper;
unsigned int num_crtc;
int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
return 0;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev) {
DRM_ERROR("failed to allocate drm fbdev.\n");
return -ENOMEM;
}
private->fb_helper = helper = &fbdev->drm_fb_helper;
helper->funcs = &exynos_drm_fb_helper_funcs;
num_crtc = dev->mode_config.num_crtc;
ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR);
if (ret < 0) {
DRM_ERROR("failed to initialize drm fb helper.\n");
goto err_init;
}
ret = drm_fb_helper_single_add_all_connectors(helper);
if (ret < 0) {
DRM_ERROR("failed to register drm_fb_helper_connector.\n");
goto err_setup;
}
ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
if (ret < 0) {
DRM_ERROR("failed to set up hw configuration.\n");
goto err_setup;
}
return 0;
err_setup:
drm_fb_helper_fini(helper);
err_init:
private->fb_helper = NULL;
kfree(fbdev);
return ret;
}
static void exynos_drm_fbdev_destroy(struct drm_device *dev,
struct drm_fb_helper *fb_helper)
{
struct drm_framebuffer *fb;
/* release drm framebuffer and real buffer */
if (fb_helper->fb && fb_helper->fb->funcs) {
fb = fb_helper->fb;
if (fb && fb->funcs->destroy)
fb->funcs->destroy(fb);
}
/* release linux framebuffer */
if (fb_helper->fbdev) {
struct fb_info *info;
int ret;
info = fb_helper->fbdev;
ret = unregister_framebuffer(info);
if (ret < 0)
DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
drm_fb_helper_fini(fb_helper);
}
void exynos_drm_fbdev_fini(struct drm_device *dev)
{
struct exynos_drm_private *private = dev->dev_private;
struct exynos_drm_fbdev *fbdev;
if (!private || !private->fb_helper)
return;
fbdev = to_exynos_fbdev(private->fb_helper);
exynos_drm_fbdev_destroy(dev, private->fb_helper);
kfree(fbdev);
private->fb_helper = NULL;
}
void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
{
struct exynos_drm_private *private = dev->dev_private;
if (!private || !private->fb_helper)
return;
drm_fb_helper_restore_fbdev_mode(private->fb_helper);
}
int exynos_drm_fbdev_reinit(struct drm_device *dev)
{
struct exynos_drm_private *private = dev->dev_private;
struct drm_fb_helper *fb_helper;
int ret;
if (!private)
return -EINVAL;
/*
* if all sub drivers were unloaded then num_connector is 0
* so at this time, the framebuffers also should be destroyed.
*/
if (!dev->mode_config.num_connector) {
exynos_drm_fbdev_fini(dev);
return 0;
}
fb_helper = private->fb_helper;
if (fb_helper) {
struct list_head temp_list;
INIT_LIST_HEAD(&temp_list);
/*
* fb_helper is reintialized but kernel fb is reused
* so kernel_fb_list need to be backuped and restored
*/
if (!list_empty(&fb_helper->kernel_fb_list))
list_replace_init(&fb_helper->kernel_fb_list,
&temp_list);
drm_fb_helper_fini(fb_helper);
ret = drm_fb_helper_init(dev, fb_helper,
dev->mode_config.num_crtc, MAX_CONNECTOR);
if (ret < 0) {
DRM_ERROR("failed to initialize drm fb helper\n");
return ret;
}
if (!list_empty(&temp_list))
list_replace(&temp_list, &fb_helper->kernel_fb_list);
ret = drm_fb_helper_single_add_all_connectors(fb_helper);
if (ret < 0) {
DRM_ERROR("failed to add fb helper to connectors\n");
goto err;
}
ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP);
if (ret < 0) {
DRM_ERROR("failed to set up hw configuration.\n");
goto err;
}
} else {
/*
* if drm_load() failed whem drm load() was called prior
* to specific drivers, fb_helper must be NULL and so
* this fuction should be called again to re-initialize and
* re-configure the fb helper. it means that this function
* has been called by the specific drivers.
*/
ret = exynos_drm_fbdev_init(dev);
}
return ret;
err:
/*
* if drm_load() failed when drm load() was called prior
* to specific drivers, the fb_helper must be NULL and so check it.
*/
if (fb_helper)
drm_fb_helper_fini(fb_helper);
return ret;
}
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 FBDEV Driver");
MODULE_LICENSE("GPL");