2014-08-22 18:36:26 +08:00
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/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author:Mark Yao <mark.yao@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <drm/drm.h>
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#include <drm/drmP.h>
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2015-11-30 18:22:42 +08:00
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#include <drm/drm_atomic.h>
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2014-08-22 18:36:26 +08:00
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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 "rockchip_drm_drv.h"
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#include "rockchip_drm_gem.h"
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#define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
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struct rockchip_drm_fb {
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struct drm_framebuffer fb;
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struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER];
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};
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struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb,
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unsigned int plane)
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{
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struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb);
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if (plane >= ROCKCHIP_MAX_FB_BUFFER)
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return NULL;
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return rk_fb->obj[plane];
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}
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static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb)
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{
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struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
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struct drm_gem_object *obj;
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int i;
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for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) {
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obj = rockchip_fb->obj[i];
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if (obj)
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drm_gem_object_unreference_unlocked(obj);
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}
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drm_framebuffer_cleanup(fb);
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kfree(rockchip_fb);
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}
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static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int *handle)
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{
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struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
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return drm_gem_handle_create(file_priv,
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rockchip_fb->obj[0], handle);
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}
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2015-12-15 19:21:12 +08:00
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static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
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2014-08-22 18:36:26 +08:00
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.destroy = rockchip_drm_fb_destroy,
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.create_handle = rockchip_drm_fb_create_handle,
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};
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static struct rockchip_drm_fb *
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2015-11-12 01:11:29 +08:00
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rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
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2014-08-22 18:36:26 +08:00
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struct drm_gem_object **obj, unsigned int num_planes)
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{
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struct rockchip_drm_fb *rockchip_fb;
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int ret;
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int i;
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rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL);
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if (!rockchip_fb)
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return ERR_PTR(-ENOMEM);
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drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd);
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for (i = 0; i < num_planes; i++)
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rockchip_fb->obj[i] = obj[i];
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ret = drm_framebuffer_init(dev, &rockchip_fb->fb,
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&rockchip_drm_fb_funcs);
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if (ret) {
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dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
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ret);
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kfree(rockchip_fb);
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return ERR_PTR(ret);
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}
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return rockchip_fb;
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}
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static struct drm_framebuffer *
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rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
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2015-11-12 01:11:29 +08:00
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const struct drm_mode_fb_cmd2 *mode_cmd)
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2014-08-22 18:36:26 +08:00
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{
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struct rockchip_drm_fb *rockchip_fb;
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struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
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struct drm_gem_object *obj;
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unsigned int hsub;
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unsigned int vsub;
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int num_planes;
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int ret;
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int i;
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hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
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vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
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num_planes = min(drm_format_num_planes(mode_cmd->pixel_format),
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ROCKCHIP_MAX_FB_BUFFER);
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for (i = 0; i < num_planes; i++) {
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unsigned int width = mode_cmd->width / (i ? hsub : 1);
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unsigned int height = mode_cmd->height / (i ? vsub : 1);
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unsigned int min_size;
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obj = drm_gem_object_lookup(dev, file_priv,
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mode_cmd->handles[i]);
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if (!obj) {
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dev_err(dev->dev, "Failed to lookup GEM object\n");
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ret = -ENXIO;
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goto err_gem_object_unreference;
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}
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min_size = (height - 1) * mode_cmd->pitches[i] +
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mode_cmd->offsets[i] +
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width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
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if (obj->size < min_size) {
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drm_gem_object_unreference_unlocked(obj);
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ret = -EINVAL;
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goto err_gem_object_unreference;
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}
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objs[i] = obj;
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}
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rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
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if (IS_ERR(rockchip_fb)) {
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ret = PTR_ERR(rockchip_fb);
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goto err_gem_object_unreference;
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}
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return &rockchip_fb->fb;
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err_gem_object_unreference:
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for (i--; i >= 0; i--)
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drm_gem_object_unreference_unlocked(objs[i]);
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return ERR_PTR(ret);
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}
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static void rockchip_drm_output_poll_changed(struct drm_device *dev)
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{
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struct rockchip_drm_private *private = dev->dev_private;
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struct drm_fb_helper *fb_helper = &private->fbdev_helper;
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2015-06-02 22:41:45 +08:00
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if (fb_helper)
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drm_fb_helper_hotplug_event(fb_helper);
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2014-08-22 18:36:26 +08:00
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}
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2015-11-30 18:22:42 +08:00
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static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc)
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{
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struct rockchip_drm_private *priv = crtc->dev->dev_private;
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int pipe = drm_crtc_index(crtc);
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const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe];
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if (crtc_funcs && crtc_funcs->wait_for_update)
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crtc_funcs->wait_for_update(crtc);
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}
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2016-01-19 18:47:00 +08:00
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/*
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* We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066
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* have hardware counters for neither vblanks nor scanlines, which results in
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* a race where:
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* | <-- HW vsync irq and reg take effect
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* plane_commit --> |
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* get_vblank and wait --> |
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* | <-- handle_vblank, vblank->count + 1
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* cleanup_fb --> |
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* iommu crash --> |
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* | <-- HW vsync irq and reg take effect
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*
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* This function is equivalent but uses rockchip_crtc_wait_for_update() instead
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* of waiting for vblank_count to change.
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*/
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2015-11-30 18:22:42 +08:00
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static void
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2016-01-19 18:46:59 +08:00
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rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state)
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2015-11-30 18:22:42 +08:00
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{
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struct drm_crtc_state *old_crtc_state;
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struct drm_crtc *crtc;
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int i, ret;
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for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
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/* No one cares about the old state, so abuse it for tracking
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* and store whether we hold a vblank reference (and should do a
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* vblank wait) in the ->enable boolean.
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*/
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old_crtc_state->enable = false;
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if (!crtc->state->active)
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continue;
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2016-01-19 18:46:59 +08:00
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if (!drm_atomic_helper_framebuffer_changed(dev,
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old_state, crtc))
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continue;
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2015-11-30 18:22:42 +08:00
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ret = drm_crtc_vblank_get(crtc);
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if (ret != 0)
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continue;
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old_crtc_state->enable = true;
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}
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for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
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if (!old_crtc_state->enable)
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continue;
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rockchip_crtc_wait_for_update(crtc);
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drm_crtc_vblank_put(crtc);
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}
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}
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2015-12-16 18:09:38 +08:00
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static void
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rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit)
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2015-11-30 18:22:42 +08:00
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{
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2015-12-16 18:09:38 +08:00
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struct drm_atomic_state *state = commit->state;
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struct drm_device *dev = commit->dev;
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2015-11-30 18:22:42 +08:00
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/*
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* TODO: do fence wait here.
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*/
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/*
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* Rockchip crtc support runtime PM, can't update display planes
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* when crtc is disabled.
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*
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* drm_atomic_helper_commit comments detail that:
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* For drivers supporting runtime PM the recommended sequence is
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*
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* drm_atomic_helper_commit_modeset_disables(dev, state);
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*
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* drm_atomic_helper_commit_modeset_enables(dev, state);
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*
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* drm_atomic_helper_commit_planes(dev, state, true);
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*
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* See the kerneldoc entries for these three functions for more details.
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*/
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drm_atomic_helper_commit_modeset_disables(dev, state);
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drm_atomic_helper_commit_modeset_enables(dev, state);
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drm_atomic_helper_commit_planes(dev, state, true);
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2016-01-19 18:46:59 +08:00
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rockchip_atomic_wait_for_complete(dev, state);
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2015-11-30 18:22:42 +08:00
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drm_atomic_helper_cleanup_planes(dev, state);
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drm_atomic_state_free(state);
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2015-12-16 18:09:38 +08:00
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}
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void rockchip_drm_atomic_work(struct work_struct *work)
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{
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struct rockchip_atomic_commit *commit = container_of(work,
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struct rockchip_atomic_commit, work);
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rockchip_atomic_commit_complete(commit);
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}
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int rockchip_drm_atomic_commit(struct drm_device *dev,
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struct drm_atomic_state *state,
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bool async)
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{
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struct rockchip_drm_private *private = dev->dev_private;
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struct rockchip_atomic_commit *commit = &private->commit;
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int ret;
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ret = drm_atomic_helper_prepare_planes(dev, state);
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if (ret)
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return ret;
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/* serialize outstanding asynchronous commits */
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mutex_lock(&commit->lock);
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flush_work(&commit->work);
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drm_atomic_helper_swap_state(dev, state);
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commit->dev = dev;
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commit->state = state;
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if (async)
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schedule_work(&commit->work);
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else
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rockchip_atomic_commit_complete(commit);
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mutex_unlock(&commit->lock);
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2015-11-30 18:22:42 +08:00
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return 0;
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}
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2014-08-22 18:36:26 +08:00
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static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
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.fb_create = rockchip_user_fb_create,
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.output_poll_changed = rockchip_drm_output_poll_changed,
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2015-11-30 18:22:42 +08:00
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = rockchip_drm_atomic_commit,
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2014-08-22 18:36:26 +08:00
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};
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struct drm_framebuffer *
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rockchip_drm_framebuffer_init(struct drm_device *dev,
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2015-11-12 01:11:29 +08:00
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const struct drm_mode_fb_cmd2 *mode_cmd,
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2014-08-22 18:36:26 +08:00
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struct drm_gem_object *obj)
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{
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struct rockchip_drm_fb *rockchip_fb;
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rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
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if (IS_ERR(rockchip_fb))
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return NULL;
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return &rockchip_fb->fb;
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}
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void rockchip_drm_mode_config_init(struct drm_device *dev)
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{
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dev->mode_config.min_width = 0;
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dev->mode_config.min_height = 0;
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/*
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* set max width and height as default value(4096x4096).
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* this value would be used to check framebuffer size limitation
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* at drm_mode_addfb().
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*/
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dev->mode_config.max_width = 4096;
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dev->mode_config.max_height = 4096;
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dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
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}
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