315 lines
7.2 KiB
C
315 lines
7.2 KiB
C
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/*
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* Copyright 2010 Matt Turner.
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* Copyright 2012 Red Hat
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License version 2. See the file COPYING in the main
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* directory of this archive for more details.
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*
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* Authors: Matthew Garrett
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* Matt Turner
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* Dave Airlie
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*/
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#include <linux/module.h>
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#include <drm/drmP.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include "mgag200_drv.h"
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static void mga_dirty_update(struct mga_fbdev *mfbdev,
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int x, int y, int width, int height)
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{
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int i;
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struct drm_gem_object *obj;
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struct mgag200_bo *bo;
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int src_offset, dst_offset;
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int bpp = mfbdev->mfb.base.format->cpp[0];
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int ret = -EBUSY;
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bool unmap = false;
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bool store_for_later = false;
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int x2, y2;
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unsigned long flags;
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obj = mfbdev->mfb.obj;
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bo = gem_to_mga_bo(obj);
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/*
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* try and reserve the BO, if we fail with busy
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* then the BO is being moved and we should
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* store up the damage until later.
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*/
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if (drm_can_sleep())
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ret = mgag200_bo_reserve(bo, true);
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if (ret) {
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if (ret != -EBUSY)
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return;
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store_for_later = true;
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}
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x2 = x + width - 1;
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y2 = y + height - 1;
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spin_lock_irqsave(&mfbdev->dirty_lock, flags);
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if (mfbdev->y1 < y)
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y = mfbdev->y1;
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if (mfbdev->y2 > y2)
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y2 = mfbdev->y2;
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if (mfbdev->x1 < x)
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x = mfbdev->x1;
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if (mfbdev->x2 > x2)
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x2 = mfbdev->x2;
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if (store_for_later) {
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mfbdev->x1 = x;
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mfbdev->x2 = x2;
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mfbdev->y1 = y;
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mfbdev->y2 = y2;
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spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
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return;
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}
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mfbdev->x1 = mfbdev->y1 = INT_MAX;
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mfbdev->x2 = mfbdev->y2 = 0;
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spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
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if (!bo->kmap.virtual) {
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ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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if (ret) {
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DRM_ERROR("failed to kmap fb updates\n");
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mgag200_bo_unreserve(bo);
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return;
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}
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unmap = true;
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}
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for (i = y; i <= y2; i++) {
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/* assume equal stride for now */
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src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
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memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
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}
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if (unmap)
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ttm_bo_kunmap(&bo->kmap);
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mgag200_bo_unreserve(bo);
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}
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static void mga_fillrect(struct fb_info *info,
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const struct fb_fillrect *rect)
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{
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struct mga_fbdev *mfbdev = info->par;
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drm_fb_helper_sys_fillrect(info, rect);
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mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
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rect->height);
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}
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static void mga_copyarea(struct fb_info *info,
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const struct fb_copyarea *area)
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{
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struct mga_fbdev *mfbdev = info->par;
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drm_fb_helper_sys_copyarea(info, area);
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mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
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area->height);
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}
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static void mga_imageblit(struct fb_info *info,
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const struct fb_image *image)
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{
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struct mga_fbdev *mfbdev = info->par;
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drm_fb_helper_sys_imageblit(info, image);
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mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
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image->height);
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}
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static struct fb_ops mgag200fb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = drm_fb_helper_check_var,
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.fb_set_par = drm_fb_helper_set_par,
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.fb_fillrect = mga_fillrect,
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.fb_copyarea = mga_copyarea,
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.fb_imageblit = mga_imageblit,
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.fb_pan_display = drm_fb_helper_pan_display,
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.fb_blank = drm_fb_helper_blank,
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.fb_setcmap = drm_fb_helper_setcmap,
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};
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static int mgag200fb_create_object(struct mga_fbdev *afbdev,
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const struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object **gobj_p)
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{
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struct drm_device *dev = afbdev->helper.dev;
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u32 size;
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struct drm_gem_object *gobj;
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int ret = 0;
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size = mode_cmd->pitches[0] * mode_cmd->height;
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ret = mgag200_gem_create(dev, size, true, &gobj);
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if (ret)
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return ret;
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*gobj_p = gobj;
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return ret;
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}
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static int mgag200fb_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 mga_fbdev *mfbdev =
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container_of(helper, struct mga_fbdev, helper);
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struct drm_device *dev = mfbdev->helper.dev;
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struct drm_mode_fb_cmd2 mode_cmd;
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struct mga_device *mdev = dev->dev_private;
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struct fb_info *info;
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struct drm_framebuffer *fb;
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struct drm_gem_object *gobj = NULL;
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int ret;
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void *sysram;
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int size;
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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.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
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if (ret) {
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DRM_ERROR("failed to create fbcon backing object %d\n", ret);
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return ret;
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}
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sysram = vmalloc(size);
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if (!sysram) {
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ret = -ENOMEM;
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goto err_sysram;
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}
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info = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(info)) {
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ret = PTR_ERR(info);
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goto err_alloc_fbi;
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}
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info->par = mfbdev;
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ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
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if (ret)
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goto err_alloc_fbi;
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mfbdev->sysram = sysram;
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mfbdev->size = size;
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fb = &mfbdev->mfb.base;
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/* setup helper */
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mfbdev->helper.fb = fb;
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strcpy(info->fix.id, "mgadrmfb");
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info->fbops = &mgag200fb_ops;
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/* setup aperture base/size for vesafb takeover */
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info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
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info->apertures->ranges[0].size = mdev->mc.vram_size;
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drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
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drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
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sizes->fb_height);
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info->screen_base = sysram;
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info->screen_size = size;
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info->pixmap.flags = FB_PIXMAP_SYSTEM;
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DRM_DEBUG_KMS("allocated %dx%d\n",
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fb->width, fb->height);
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return 0;
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err_alloc_fbi:
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vfree(sysram);
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err_sysram:
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drm_gem_object_put_unlocked(gobj);
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return ret;
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}
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static int mga_fbdev_destroy(struct drm_device *dev,
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struct mga_fbdev *mfbdev)
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{
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struct mga_framebuffer *mfb = &mfbdev->mfb;
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drm_fb_helper_unregister_fbi(&mfbdev->helper);
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if (mfb->obj) {
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drm_gem_object_put_unlocked(mfb->obj);
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mfb->obj = NULL;
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}
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drm_fb_helper_fini(&mfbdev->helper);
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vfree(mfbdev->sysram);
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drm_framebuffer_unregister_private(&mfb->base);
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drm_framebuffer_cleanup(&mfb->base);
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return 0;
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}
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static const struct drm_fb_helper_funcs mga_fb_helper_funcs = {
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.fb_probe = mgag200fb_create,
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};
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int mgag200_fbdev_init(struct mga_device *mdev)
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{
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struct mga_fbdev *mfbdev;
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int ret;
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int bpp_sel = 32;
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/* prefer 16bpp on low end gpus with limited VRAM */
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if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
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bpp_sel = 16;
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mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
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if (!mfbdev)
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return -ENOMEM;
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mdev->mfbdev = mfbdev;
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spin_lock_init(&mfbdev->dirty_lock);
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drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs);
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ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
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MGAG200FB_CONN_LIMIT);
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if (ret)
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goto err_fb_helper;
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ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
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if (ret)
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goto err_fb_setup;
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/* disable all the possible outputs/crtcs before entering KMS mode */
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drm_helper_disable_unused_functions(mdev->dev);
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ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
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if (ret)
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goto err_fb_setup;
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return 0;
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err_fb_setup:
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drm_fb_helper_fini(&mfbdev->helper);
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err_fb_helper:
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mdev->mfbdev = NULL;
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return ret;
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}
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void mgag200_fbdev_fini(struct mga_device *mdev)
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{
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if (!mdev->mfbdev)
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return;
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mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
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}
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