Release 4.7 drivers/gpu/drm/rockchip/rockchip_drm_fb.c

/*
 * 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];
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
43
100.00%
1
100.00%
Total
43
100.00%
1
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
72
100.00%
1
100.00%
Total
72
100.00%
1
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
46
100.00%
1
100.00%
Total
46
100.00%
1
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
145
99.32%
1
50.00%
ville syrjala
ville syrjala
1
0.68%
1
50.00%
Total
146
100.00%
2
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
308
99.68%
1
50.00%
ville syrjala
ville syrjala
1
0.32%
1
50.00%
Total
309
100.00%
2
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
35
89.74%
1
50.00%
heiko stuebner
heiko stuebner
4
10.26%
1
50.00%
Total
39
100.00%
2
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
58
100.00%
1
100.00%
Total
58
100.00%
1
100.00%

/*
 * 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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
105
85.37%
1
50.00%
john keeping
john keeping
18
14.63%
1
50.00%
Total
123
100.00%
2
100.00%


static void

rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit)
{
	struct drm_atomic_state *state = commit->state;
	struct drm_device *dev = commit->dev;

	/*
         * TODO: do fence wait here.
         */

	/*
         * Rockchip crtc support runtime PM, can't update display planes
         * when crtc is disabled.
         *
         * drm_atomic_helper_commit comments detail that:
         *     For drivers supporting runtime PM the recommended sequence is
         *
         *     drm_atomic_helper_commit_modeset_disables(dev, state);
         *
         *     drm_atomic_helper_commit_modeset_enables(dev, state);
         *
         *     drm_atomic_helper_commit_planes(dev, state, true);
         *
         * See the kerneldoc entries for these three functions for more details.
         */
	drm_atomic_helper_commit_modeset_disables(dev, state);

	drm_atomic_helper_commit_modeset_enables(dev, state);

	drm_atomic_helper_commit_planes(dev, state, true);

	rockchip_atomic_wait_for_complete(dev, state);

	drm_atomic_helper_cleanup_planes(dev, state);

	drm_atomic_state_free(state);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
71
97.26%
1
50.00%
john keeping
john keeping
2
2.74%
1
50.00%
Total
73
100.00%
2
100.00%



void rockchip_drm_atomic_work(struct work_struct *work)
{
	struct rockchip_atomic_commit *commit = container_of(work,
					struct rockchip_atomic_commit, work);

	rockchip_atomic_commit_complete(commit);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
30
100.00%
1
100.00%
Total
30
100.00%
1
100.00%



int rockchip_drm_atomic_commit(struct drm_device *dev,
			       struct drm_atomic_state *state,
			       bool nonblock)
{
	struct rockchip_drm_private *private = dev->dev_private;
	struct rockchip_atomic_commit *commit = &private->commit;
	int ret;

	ret = drm_atomic_helper_prepare_planes(dev, state);
	if (ret)
		return ret;

	/* serialize outstanding nonblocking commits */
	mutex_lock(&commit->lock);
	flush_work(&commit->work);

	drm_atomic_helper_swap_state(dev, state);

	commit->dev = dev;
	commit->state = state;

	if (nonblock)
		schedule_work(&commit->work);
	else
		rockchip_atomic_commit_complete(commit);

	mutex_unlock(&commit->lock);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
118
97.52%
2
66.67%
maarten lankhorst
maarten lankhorst
3
2.48%
1
33.33%
Total
121
100.00%
3
100.00%


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 = rockchip_drm_atomic_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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
57
98.28%
1
50.00%
ville syrjala
ville syrjala
1
1.72%
1
50.00%
Total
58
100.00%
2
100.00%



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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
52
100.00%
1
100.00%
Total
52
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
mark yao
mark yao
1234
97.47%
3
33.33%
john keeping
john keeping
21
1.66%
2
22.22%
heiko stuebner
heiko stuebner
4
0.32%
1
11.11%
ville syrjala
ville syrjala
4
0.32%
2
22.22%
maarten lankhorst
maarten lankhorst
3
0.24%
1
11.11%
Total
1266
100.00%
9
100.00%
  
Directory: drivers/gpu/drm/rockchip

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.