mirror of https://gitee.com/openkylin/linux.git
469 lines
12 KiB
C
469 lines
12 KiB
C
/* exynos_drm_fbdev.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#include "drm_crtc.h"
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#include "drm_fb_helper.h"
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#include "drm_crtc_helper.h"
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#include "exynos_drm_drv.h"
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#include "exynos_drm_fb.h"
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#include "exynos_drm_gem.h"
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#include "exynos_drm_buf.h"
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#define MAX_CONNECTOR 4
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#define PREFERRED_BPP 32
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#define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
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drm_fb_helper)
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struct exynos_drm_fbdev {
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struct drm_fb_helper drm_fb_helper;
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struct drm_framebuffer *fb;
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};
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static int exynos_drm_fbdev_set_par(struct fb_info *info)
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{
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struct fb_var_screeninfo *var = &info->var;
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switch (var->bits_per_pixel) {
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case 32:
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case 24:
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case 18:
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case 16:
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case 12:
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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break;
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case 1:
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info->fix.visual = FB_VISUAL_MONO01;
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break;
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default:
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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break;
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}
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info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
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return drm_fb_helper_set_par(info);
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}
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static struct fb_ops exynos_drm_fb_ops = {
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.owner = THIS_MODULE,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_check_var = drm_fb_helper_check_var,
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.fb_set_par = exynos_drm_fbdev_set_par,
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.fb_blank = drm_fb_helper_blank,
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.fb_pan_display = drm_fb_helper_pan_display,
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.fb_setcmap = drm_fb_helper_setcmap,
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};
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static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
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struct drm_framebuffer *fb)
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{
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struct fb_info *fbi = helper->fbdev;
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struct drm_device *dev = helper->dev;
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struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper);
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struct exynos_drm_gem_buf *buffer;
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unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3);
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unsigned long offset;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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exynos_fb->fb = fb;
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drm_fb_helper_fill_fix(fbi, fb->pitch, fb->depth);
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drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height);
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buffer = exynos_drm_fb_get_buf(fb);
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if (!buffer) {
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DRM_LOG_KMS("buffer is null.\n");
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return -EFAULT;
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}
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offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3);
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offset += fbi->var.yoffset * fb->pitch;
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dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr;
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fbi->screen_base = buffer->kvaddr + offset;
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fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset);
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fbi->screen_size = size;
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fbi->fix.smem_len = size;
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return 0;
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}
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static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
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struct drm_device *dev = helper->dev;
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struct fb_info *fbi;
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struct drm_mode_fb_cmd mode_cmd = { 0 };
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struct platform_device *pdev = dev->platformdev;
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int ret;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
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sizes->surface_width, sizes->surface_height,
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sizes->surface_bpp);
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.bpp = sizes->surface_bpp;
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mode_cmd.depth = sizes->surface_depth;
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mutex_lock(&dev->struct_mutex);
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fbi = framebuffer_alloc(0, &pdev->dev);
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if (!fbi) {
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DRM_ERROR("failed to allocate fb info.\n");
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ret = -ENOMEM;
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goto out;
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}
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exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
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if (IS_ERR_OR_NULL(exynos_fbdev->fb)) {
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DRM_ERROR("failed to create drm framebuffer.\n");
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ret = PTR_ERR(exynos_fbdev->fb);
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goto out;
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}
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helper->fb = exynos_fbdev->fb;
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helper->fbdev = fbi;
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fbi->par = helper;
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fbi->flags = FBINFO_FLAG_DEFAULT;
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fbi->fbops = &exynos_drm_fb_ops;
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ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
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if (ret) {
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DRM_ERROR("failed to allocate cmap.\n");
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goto out;
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}
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ret = exynos_drm_fbdev_update(helper, helper->fb);
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if (ret < 0)
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fb_dealloc_cmap(&fbi->cmap);
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/*
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* if failed, all resources allocated above would be released by
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* drm_mode_config_cleanup() when drm_load() had been called prior
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* to any specific driver such as fimd or hdmi driver.
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*/
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out:
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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static bool
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exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb,
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struct drm_fb_helper_surface_size *sizes)
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{
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if (fb->width != sizes->surface_width)
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return false;
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if (fb->height != sizes->surface_height)
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return false;
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if (fb->bits_per_pixel != sizes->surface_bpp)
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return false;
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if (fb->depth != sizes->surface_depth)
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return false;
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return true;
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}
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static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct drm_device *dev = helper->dev;
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struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
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struct drm_framebuffer *fb = exynos_fbdev->fb;
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struct drm_mode_fb_cmd mode_cmd = { 0 };
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (helper->fb != fb) {
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DRM_ERROR("drm framebuffer is different\n");
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return -EINVAL;
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}
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if (exynos_drm_fbdev_is_samefb(fb, sizes))
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return 0;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.bpp = sizes->surface_bpp;
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mode_cmd.depth = sizes->surface_depth;
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if (fb->funcs->destroy)
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fb->funcs->destroy(fb);
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exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
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if (IS_ERR(exynos_fbdev->fb)) {
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DRM_ERROR("failed to allocate fb.\n");
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return PTR_ERR(exynos_fbdev->fb);
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}
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helper->fb = exynos_fbdev->fb;
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return exynos_drm_fbdev_update(helper, helper->fb);
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}
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static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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int ret = 0;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (!helper->fb) {
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ret = exynos_drm_fbdev_create(helper, sizes);
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if (ret < 0) {
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DRM_ERROR("failed to create fbdev.\n");
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return ret;
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}
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/*
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* fb_helper expects a value more than 1 if succeed
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* because register_framebuffer() should be called.
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*/
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ret = 1;
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} else {
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ret = exynos_drm_fbdev_recreate(helper, sizes);
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if (ret < 0) {
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DRM_ERROR("failed to reconfigure fbdev\n");
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return ret;
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}
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}
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return ret;
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}
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static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
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.fb_probe = exynos_drm_fbdev_probe,
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};
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int exynos_drm_fbdev_init(struct drm_device *dev)
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{
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struct exynos_drm_fbdev *fbdev;
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struct exynos_drm_private *private = dev->dev_private;
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struct drm_fb_helper *helper;
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unsigned int num_crtc;
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int ret;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
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return 0;
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fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
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if (!fbdev) {
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DRM_ERROR("failed to allocate drm fbdev.\n");
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return -ENOMEM;
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}
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private->fb_helper = helper = &fbdev->drm_fb_helper;
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helper->funcs = &exynos_drm_fb_helper_funcs;
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num_crtc = dev->mode_config.num_crtc;
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ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR);
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if (ret < 0) {
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DRM_ERROR("failed to initialize drm fb helper.\n");
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goto err_init;
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}
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ret = drm_fb_helper_single_add_all_connectors(helper);
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if (ret < 0) {
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DRM_ERROR("failed to register drm_fb_helper_connector.\n");
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goto err_setup;
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}
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ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
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if (ret < 0) {
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DRM_ERROR("failed to set up hw configuration.\n");
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goto err_setup;
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}
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return 0;
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err_setup:
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drm_fb_helper_fini(helper);
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err_init:
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private->fb_helper = NULL;
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kfree(fbdev);
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return ret;
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}
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static void exynos_drm_fbdev_destroy(struct drm_device *dev,
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struct drm_fb_helper *fb_helper)
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{
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struct drm_framebuffer *fb;
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/* release drm framebuffer and real buffer */
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if (fb_helper->fb && fb_helper->fb->funcs) {
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fb = fb_helper->fb;
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if (fb && fb->funcs->destroy)
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fb->funcs->destroy(fb);
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}
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/* release linux framebuffer */
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if (fb_helper->fbdev) {
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struct fb_info *info;
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int ret;
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info = fb_helper->fbdev;
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ret = unregister_framebuffer(info);
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if (ret < 0)
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DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
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if (info->cmap.len)
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fb_dealloc_cmap(&info->cmap);
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framebuffer_release(info);
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}
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drm_fb_helper_fini(fb_helper);
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}
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void exynos_drm_fbdev_fini(struct drm_device *dev)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct exynos_drm_fbdev *fbdev;
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if (!private || !private->fb_helper)
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return;
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fbdev = to_exynos_fbdev(private->fb_helper);
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exynos_drm_fbdev_destroy(dev, private->fb_helper);
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kfree(fbdev);
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private->fb_helper = NULL;
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}
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void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
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{
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struct exynos_drm_private *private = dev->dev_private;
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if (!private || !private->fb_helper)
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return;
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drm_fb_helper_restore_fbdev_mode(private->fb_helper);
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}
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int exynos_drm_fbdev_reinit(struct drm_device *dev)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct drm_fb_helper *fb_helper;
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int ret;
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if (!private)
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return -EINVAL;
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/*
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* if all sub drivers were unloaded then num_connector is 0
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* so at this time, the framebuffers also should be destroyed.
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*/
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if (!dev->mode_config.num_connector) {
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exynos_drm_fbdev_fini(dev);
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return 0;
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}
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fb_helper = private->fb_helper;
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if (fb_helper) {
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struct list_head temp_list;
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INIT_LIST_HEAD(&temp_list);
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/*
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* fb_helper is reintialized but kernel fb is reused
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* so kernel_fb_list need to be backuped and restored
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*/
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if (!list_empty(&fb_helper->kernel_fb_list))
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list_replace_init(&fb_helper->kernel_fb_list,
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&temp_list);
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drm_fb_helper_fini(fb_helper);
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ret = drm_fb_helper_init(dev, fb_helper,
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dev->mode_config.num_crtc, MAX_CONNECTOR);
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if (ret < 0) {
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DRM_ERROR("failed to initialize drm fb helper\n");
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return ret;
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}
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if (!list_empty(&temp_list))
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list_replace(&temp_list, &fb_helper->kernel_fb_list);
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ret = drm_fb_helper_single_add_all_connectors(fb_helper);
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if (ret < 0) {
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DRM_ERROR("failed to add fb helper to connectors\n");
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goto err;
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}
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ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP);
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if (ret < 0) {
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DRM_ERROR("failed to set up hw configuration.\n");
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goto err;
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}
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} else {
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/*
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* if drm_load() failed whem drm load() was called prior
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* to specific drivers, fb_helper must be NULL and so
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* this fuction should be called again to re-initialize and
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* re-configure the fb helper. it means that this function
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* has been called by the specific drivers.
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*/
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ret = exynos_drm_fbdev_init(dev);
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}
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return ret;
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err:
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/*
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* if drm_load() failed when drm load() was called prior
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* to specific drivers, the fb_helper must be NULL and so check it.
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*/
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if (fb_helper)
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drm_fb_helper_fini(fb_helper);
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return ret;
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}
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MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
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MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
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MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
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MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver");
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MODULE_LICENSE("GPL");
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