| /* |
| * Copyright 2012 Red Hat Inc. |
| * |
| * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS 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. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| */ |
| /* |
| * Authors: Dave Airlie <airlied@redhat.com> |
| */ |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/mm.h> |
| #include <linux/tty.h> |
| #include <linux/sysrq.h> |
| #include <linux/delay.h> |
| #include <linux/fb.h> |
| #include <linux/init.h> |
| |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| #include "ast_drv.h" |
| |
| static void ast_dirty_update(struct ast_fbdev *afbdev, |
| int x, int y, int width, int height) |
| { |
| int i; |
| struct drm_gem_object *obj; |
| struct ast_bo *bo; |
| int src_offset, dst_offset; |
| int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8; |
| int ret = -EBUSY; |
| bool unmap = false; |
| bool store_for_later = false; |
| int x2, y2; |
| unsigned long flags; |
| |
| obj = afbdev->afb.obj; |
| bo = gem_to_ast_bo(obj); |
| |
| /* |
| * try and reserve the BO, if we fail with busy |
| * then the BO is being moved and we should |
| * store up the damage until later. |
| */ |
| if (drm_can_sleep()) |
| ret = ast_bo_reserve(bo, true); |
| if (ret) { |
| if (ret != -EBUSY) |
| return; |
| |
| store_for_later = true; |
| } |
| |
| x2 = x + width - 1; |
| y2 = y + height - 1; |
| spin_lock_irqsave(&afbdev->dirty_lock, flags); |
| |
| if (afbdev->y1 < y) |
| y = afbdev->y1; |
| if (afbdev->y2 > y2) |
| y2 = afbdev->y2; |
| if (afbdev->x1 < x) |
| x = afbdev->x1; |
| if (afbdev->x2 > x2) |
| x2 = afbdev->x2; |
| |
| if (store_for_later) { |
| afbdev->x1 = x; |
| afbdev->x2 = x2; |
| afbdev->y1 = y; |
| afbdev->y2 = y2; |
| spin_unlock_irqrestore(&afbdev->dirty_lock, flags); |
| return; |
| } |
| |
| afbdev->x1 = afbdev->y1 = INT_MAX; |
| afbdev->x2 = afbdev->y2 = 0; |
| spin_unlock_irqrestore(&afbdev->dirty_lock, flags); |
| |
| if (!bo->kmap.virtual) { |
| ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); |
| if (ret) { |
| DRM_ERROR("failed to kmap fb updates\n"); |
| ast_bo_unreserve(bo); |
| return; |
| } |
| unmap = true; |
| } |
| for (i = y; i <= y2; i++) { |
| /* assume equal stride for now */ |
| src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp); |
| memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp); |
| |
| } |
| if (unmap) |
| ttm_bo_kunmap(&bo->kmap); |
| |
| ast_bo_unreserve(bo); |
| } |
| |
| static void ast_fillrect(struct fb_info *info, |
| const struct fb_fillrect *rect) |
| { |
| struct ast_fbdev *afbdev = info->par; |
| sys_fillrect(info, rect); |
| ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width, |
| rect->height); |
| } |
| |
| static void ast_copyarea(struct fb_info *info, |
| const struct fb_copyarea *area) |
| { |
| struct ast_fbdev *afbdev = info->par; |
| sys_copyarea(info, area); |
| ast_dirty_update(afbdev, area->dx, area->dy, area->width, |
| area->height); |
| } |
| |
| static void ast_imageblit(struct fb_info *info, |
| const struct fb_image *image) |
| { |
| struct ast_fbdev *afbdev = info->par; |
| sys_imageblit(info, image); |
| ast_dirty_update(afbdev, image->dx, image->dy, image->width, |
| image->height); |
| } |
| |
| static struct fb_ops astfb_ops = { |
| .owner = THIS_MODULE, |
| .fb_check_var = drm_fb_helper_check_var, |
| .fb_set_par = drm_fb_helper_set_par, |
| .fb_fillrect = ast_fillrect, |
| .fb_copyarea = ast_copyarea, |
| .fb_imageblit = ast_imageblit, |
| .fb_pan_display = drm_fb_helper_pan_display, |
| .fb_blank = drm_fb_helper_blank, |
| .fb_setcmap = drm_fb_helper_setcmap, |
| .fb_debug_enter = drm_fb_helper_debug_enter, |
| .fb_debug_leave = drm_fb_helper_debug_leave, |
| }; |
| |
| static int astfb_create_object(struct ast_fbdev *afbdev, |
| struct drm_mode_fb_cmd2 *mode_cmd, |
| struct drm_gem_object **gobj_p) |
| { |
| struct drm_device *dev = afbdev->helper.dev; |
| u32 bpp, depth; |
| u32 size; |
| struct drm_gem_object *gobj; |
| |
| int ret = 0; |
| drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); |
| |
| size = mode_cmd->pitches[0] * mode_cmd->height; |
| ret = ast_gem_create(dev, size, true, &gobj); |
| if (ret) |
| return ret; |
| |
| *gobj_p = gobj; |
| return ret; |
| } |
| |
| static int astfb_create(struct drm_fb_helper *helper, |
| struct drm_fb_helper_surface_size *sizes) |
| { |
| struct ast_fbdev *afbdev = |
| container_of(helper, struct ast_fbdev, helper); |
| struct drm_device *dev = afbdev->helper.dev; |
| struct drm_mode_fb_cmd2 mode_cmd; |
| struct drm_framebuffer *fb; |
| struct fb_info *info; |
| int size, ret; |
| struct device *device = &dev->pdev->dev; |
| void *sysram; |
| struct drm_gem_object *gobj = NULL; |
| struct ast_bo *bo = NULL; |
| mode_cmd.width = sizes->surface_width; |
| mode_cmd.height = sizes->surface_height; |
| mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8); |
| |
| mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, |
| sizes->surface_depth); |
| |
| size = mode_cmd.pitches[0] * mode_cmd.height; |
| |
| ret = astfb_create_object(afbdev, &mode_cmd, &gobj); |
| if (ret) { |
| DRM_ERROR("failed to create fbcon backing object %d\n", ret); |
| return ret; |
| } |
| bo = gem_to_ast_bo(gobj); |
| |
| sysram = vmalloc(size); |
| if (!sysram) |
| return -ENOMEM; |
| |
| info = framebuffer_alloc(0, device); |
| if (!info) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| info->par = afbdev; |
| |
| ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj); |
| if (ret) |
| goto out; |
| |
| afbdev->sysram = sysram; |
| afbdev->size = size; |
| |
| fb = &afbdev->afb.base; |
| afbdev->helper.fb = fb; |
| afbdev->helper.fbdev = info; |
| |
| strcpy(info->fix.id, "astdrmfb"); |
| |
| info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; |
| info->fbops = &astfb_ops; |
| |
| ret = fb_alloc_cmap(&info->cmap, 256, 0); |
| if (ret) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| info->apertures = alloc_apertures(1); |
| if (!info->apertures) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0); |
| info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0); |
| |
| drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); |
| drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height); |
| |
| info->screen_base = sysram; |
| info->screen_size = size; |
| |
| info->pixmap.flags = FB_PIXMAP_SYSTEM; |
| |
| DRM_DEBUG_KMS("allocated %dx%d\n", |
| fb->width, fb->height); |
| |
| return 0; |
| out: |
| return ret; |
| } |
| |
| static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, |
| u16 blue, int regno) |
| { |
| struct ast_crtc *ast_crtc = to_ast_crtc(crtc); |
| ast_crtc->lut_r[regno] = red >> 8; |
| ast_crtc->lut_g[regno] = green >> 8; |
| ast_crtc->lut_b[regno] = blue >> 8; |
| } |
| |
| static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, |
| u16 *blue, int regno) |
| { |
| struct ast_crtc *ast_crtc = to_ast_crtc(crtc); |
| *red = ast_crtc->lut_r[regno] << 8; |
| *green = ast_crtc->lut_g[regno] << 8; |
| *blue = ast_crtc->lut_b[regno] << 8; |
| } |
| |
| static const struct drm_fb_helper_funcs ast_fb_helper_funcs = { |
| .gamma_set = ast_fb_gamma_set, |
| .gamma_get = ast_fb_gamma_get, |
| .fb_probe = astfb_create, |
| }; |
| |
| static void ast_fbdev_destroy(struct drm_device *dev, |
| struct ast_fbdev *afbdev) |
| { |
| struct fb_info *info; |
| struct ast_framebuffer *afb = &afbdev->afb; |
| if (afbdev->helper.fbdev) { |
| info = afbdev->helper.fbdev; |
| unregister_framebuffer(info); |
| if (info->cmap.len) |
| fb_dealloc_cmap(&info->cmap); |
| framebuffer_release(info); |
| } |
| |
| if (afb->obj) { |
| drm_gem_object_unreference_unlocked(afb->obj); |
| afb->obj = NULL; |
| } |
| drm_fb_helper_fini(&afbdev->helper); |
| |
| vfree(afbdev->sysram); |
| drm_framebuffer_unregister_private(&afb->base); |
| drm_framebuffer_cleanup(&afb->base); |
| } |
| |
| int ast_fbdev_init(struct drm_device *dev) |
| { |
| struct ast_private *ast = dev->dev_private; |
| struct ast_fbdev *afbdev; |
| int ret; |
| |
| afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL); |
| if (!afbdev) |
| return -ENOMEM; |
| |
| ast->fbdev = afbdev; |
| spin_lock_init(&afbdev->dirty_lock); |
| |
| drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs); |
| |
| ret = drm_fb_helper_init(dev, &afbdev->helper, |
| 1, 1); |
| if (ret) |
| goto free; |
| |
| ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper); |
| if (ret) |
| goto fini; |
| |
| /* disable all the possible outputs/crtcs before entering KMS mode */ |
| drm_helper_disable_unused_functions(dev); |
| |
| ret = drm_fb_helper_initial_config(&afbdev->helper, 32); |
| if (ret) |
| goto fini; |
| |
| return 0; |
| |
| fini: |
| drm_fb_helper_fini(&afbdev->helper); |
| free: |
| kfree(afbdev); |
| return ret; |
| } |
| |
| void ast_fbdev_fini(struct drm_device *dev) |
| { |
| struct ast_private *ast = dev->dev_private; |
| |
| if (!ast->fbdev) |
| return; |
| |
| ast_fbdev_destroy(dev, ast->fbdev); |
| kfree(ast->fbdev); |
| ast->fbdev = NULL; |
| } |
| |
| void ast_fbdev_set_suspend(struct drm_device *dev, int state) |
| { |
| struct ast_private *ast = dev->dev_private; |
| |
| if (!ast->fbdev) |
| return; |
| |
| fb_set_suspend(ast->fbdev->helper.fbdev, state); |
| } |