| /* |
| * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd |
| * Author:Mark Yao <mark.yao@rock-chips.com> |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <drm/drm.h> |
| #include <drm/drmP.h> |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| |
| #include "rockchip_drm_drv.h" |
| #include "rockchip_drm_gem.h" |
| |
| #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) |
| |
| struct rockchip_drm_fb { |
| struct drm_framebuffer fb; |
| struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER]; |
| }; |
| |
| struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb, |
| unsigned int plane) |
| { |
| struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb); |
| |
| if (plane >= ROCKCHIP_MAX_FB_BUFFER) |
| return NULL; |
| |
| return rk_fb->obj[plane]; |
| } |
| |
| static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) |
| { |
| struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); |
| struct drm_gem_object *obj; |
| int i; |
| |
| for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) { |
| obj = rockchip_fb->obj[i]; |
| if (obj) |
| drm_gem_object_unreference_unlocked(obj); |
| } |
| |
| drm_framebuffer_cleanup(fb); |
| kfree(rockchip_fb); |
| } |
| |
| static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, |
| struct drm_file *file_priv, |
| unsigned int *handle) |
| { |
| struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); |
| |
| return drm_gem_handle_create(file_priv, |
| rockchip_fb->obj[0], handle); |
| } |
| |
| static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { |
| .destroy = rockchip_drm_fb_destroy, |
| .create_handle = rockchip_drm_fb_create_handle, |
| }; |
| |
| static struct rockchip_drm_fb * |
| rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, |
| struct drm_gem_object **obj, unsigned int num_planes) |
| { |
| struct rockchip_drm_fb *rockchip_fb; |
| int ret; |
| int i; |
| |
| rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); |
| if (!rockchip_fb) |
| return ERR_PTR(-ENOMEM); |
| |
| drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); |
| |
| for (i = 0; i < num_planes; i++) |
| rockchip_fb->obj[i] = obj[i]; |
| |
| ret = drm_framebuffer_init(dev, &rockchip_fb->fb, |
| &rockchip_drm_fb_funcs); |
| if (ret) { |
| dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", |
| ret); |
| kfree(rockchip_fb); |
| return ERR_PTR(ret); |
| } |
| |
| return rockchip_fb; |
| } |
| |
| static struct drm_framebuffer * |
| rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, |
| const struct drm_mode_fb_cmd2 *mode_cmd) |
| { |
| struct rockchip_drm_fb *rockchip_fb; |
| struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; |
| struct drm_gem_object *obj; |
| unsigned int hsub; |
| unsigned int vsub; |
| int num_planes; |
| int ret; |
| int i; |
| |
| hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); |
| vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); |
| num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), |
| ROCKCHIP_MAX_FB_BUFFER); |
| |
| for (i = 0; i < num_planes; i++) { |
| unsigned int width = mode_cmd->width / (i ? hsub : 1); |
| unsigned int height = mode_cmd->height / (i ? vsub : 1); |
| unsigned int min_size; |
| |
| obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); |
| if (!obj) { |
| dev_err(dev->dev, "Failed to lookup GEM object\n"); |
| ret = -ENXIO; |
| goto err_gem_object_unreference; |
| } |
| |
| min_size = (height - 1) * mode_cmd->pitches[i] + |
| mode_cmd->offsets[i] + |
| width * drm_format_plane_cpp(mode_cmd->pixel_format, i); |
| |
| if (obj->size < min_size) { |
| drm_gem_object_unreference_unlocked(obj); |
| ret = -EINVAL; |
| goto err_gem_object_unreference; |
| } |
| objs[i] = obj; |
| } |
| |
| rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); |
| if (IS_ERR(rockchip_fb)) { |
| ret = PTR_ERR(rockchip_fb); |
| goto err_gem_object_unreference; |
| } |
| |
| return &rockchip_fb->fb; |
| |
| err_gem_object_unreference: |
| for (i--; i >= 0; i--) |
| drm_gem_object_unreference_unlocked(objs[i]); |
| return ERR_PTR(ret); |
| } |
| |
| static void rockchip_drm_output_poll_changed(struct drm_device *dev) |
| { |
| struct rockchip_drm_private *private = dev->dev_private; |
| struct drm_fb_helper *fb_helper = &private->fbdev_helper; |
| |
| if (fb_helper) |
| drm_fb_helper_hotplug_event(fb_helper); |
| } |
| |
| static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc) |
| { |
| struct rockchip_drm_private *priv = crtc->dev->dev_private; |
| int pipe = drm_crtc_index(crtc); |
| const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe]; |
| |
| if (crtc_funcs && crtc_funcs->wait_for_update) |
| crtc_funcs->wait_for_update(crtc); |
| } |
| |
| /* |
| * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066 |
| * have hardware counters for neither vblanks nor scanlines, which results in |
| * a race where: |
| * | <-- HW vsync irq and reg take effect |
| * plane_commit --> | |
| * get_vblank and wait --> | |
| * | <-- handle_vblank, vblank->count + 1 |
| * cleanup_fb --> | |
| * iommu crash --> | |
| * | <-- HW vsync irq and reg take effect |
| * |
| * This function is equivalent but uses rockchip_crtc_wait_for_update() instead |
| * of waiting for vblank_count to change. |
| */ |
| static void |
| rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state) |
| { |
| struct drm_crtc_state *old_crtc_state; |
| struct drm_crtc *crtc; |
| int i, ret; |
| |
| for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
| /* No one cares about the old state, so abuse it for tracking |
| * and store whether we hold a vblank reference (and should do a |
| * vblank wait) in the ->enable boolean. |
| */ |
| old_crtc_state->enable = false; |
| |
| if (!crtc->state->active) |
| continue; |
| |
| if (!drm_atomic_helper_framebuffer_changed(dev, |
| old_state, crtc)) |
| continue; |
| |
| ret = drm_crtc_vblank_get(crtc); |
| if (ret != 0) |
| continue; |
| |
| old_crtc_state->enable = true; |
| } |
| |
| for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
| if (!old_crtc_state->enable) |
| continue; |
| |
| rockchip_crtc_wait_for_update(crtc); |
| drm_crtc_vblank_put(crtc); |
| } |
| } |
| |
| static void |
| rockchip_atomic_commit_tail(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| |
| drm_atomic_helper_commit_modeset_disables(dev, state); |
| |
| drm_atomic_helper_commit_modeset_enables(dev, state); |
| |
| drm_atomic_helper_commit_planes(dev, state, true); |
| |
| drm_atomic_helper_commit_hw_done(state); |
| |
| rockchip_atomic_wait_for_complete(dev, state); |
| |
| drm_atomic_helper_cleanup_planes(dev, state); |
| } |
| |
| struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { |
| .atomic_commit_tail = rockchip_atomic_commit_tail, |
| }; |
| |
| static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { |
| .fb_create = rockchip_user_fb_create, |
| .output_poll_changed = rockchip_drm_output_poll_changed, |
| .atomic_check = drm_atomic_helper_check, |
| .atomic_commit = drm_atomic_helper_commit, |
| }; |
| |
| struct drm_framebuffer * |
| rockchip_drm_framebuffer_init(struct drm_device *dev, |
| const struct drm_mode_fb_cmd2 *mode_cmd, |
| struct drm_gem_object *obj) |
| { |
| struct rockchip_drm_fb *rockchip_fb; |
| |
| rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); |
| if (IS_ERR(rockchip_fb)) |
| return NULL; |
| |
| return &rockchip_fb->fb; |
| } |
| |
| void rockchip_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 = &rockchip_drm_mode_config_funcs; |
| dev->mode_config.helper_private = &rockchip_mode_config_helpers; |
| } |