[linux-2.6-block.git] / drivers / gpu / drm / msm / msm_fbdev.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "msm_drv.h"

#include "drm_crtc.h"
#include "drm_fb_helper.h"
#include "msm_gem.h"

extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
					struct vm_area_struct *vma);
static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma);

/*
 * fbdev funcs, to implement legacy fbdev interface on top of drm driver
 */

#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)

struct msm_fbdev {
	struct drm_fb_helper base;
	struct drm_framebuffer *fb;
	struct drm_gem_object *bo;
};

static struct fb_ops msm_fb_ops = {
	.owner = THIS_MODULE,

	/* Note: to properly handle manual update displays, we wrap the
	 * basic fbdev ops which write to the framebuffer
	 */
	.fb_read = drm_fb_helper_sys_read,
	.fb_write = drm_fb_helper_sys_write,
	.fb_fillrect = drm_fb_helper_sys_fillrect,
	.fb_copyarea = drm_fb_helper_sys_copyarea,
	.fb_imageblit = drm_fb_helper_sys_imageblit,
	.fb_mmap = msm_fbdev_mmap,

	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_pan_display = drm_fb_helper_pan_display,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcmap = drm_fb_helper_setcmap,
};

static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;
	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	struct drm_gem_object *drm_obj = fbdev->bo;
	int ret = 0;

	ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
	if (ret) {
		pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
		return ret;
	}

	return msm_gem_mmap_obj(drm_obj, vma);
}

static int msm_fbdev_create(struct drm_fb_helper *helper,
		struct drm_fb_helper_surface_size *sizes)
{
	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	struct drm_device *dev = helper->dev;
	struct drm_framebuffer *fb = NULL;
	struct fb_info *fbi = NULL;
	struct drm_mode_fb_cmd2 mode_cmd = {0};
	uint32_t paddr;
	int ret, size;

	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
			sizes->surface_height, sizes->surface_bpp,
			sizes->fb_width, sizes->fb_height);

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
			sizes->surface_depth);

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	mode_cmd.pitches[0] = align_pitch(
			mode_cmd.width, sizes->surface_bpp);

	/* allocate backing bo */
	size = mode_cmd.pitches[0] * mode_cmd.height;
	DBG("allocating %d bytes for fb %d", size, dev->primary->index);
	mutex_lock(&dev->struct_mutex);
	fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT |
			MSM_BO_WC | MSM_BO_STOLEN);
	mutex_unlock(&dev->struct_mutex);
	if (IS_ERR(fbdev->bo)) {
		ret = PTR_ERR(fbdev->bo);
		fbdev->bo = NULL;
		dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret);
		goto fail;
	}

	fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
	if (IS_ERR(fb)) {
		dev_err(dev->dev, "failed to allocate fb\n");
		/* note: if fb creation failed, we can't rely on fb destroy
		 * to unref the bo:
		 */
		drm_gem_object_unreference_unlocked(fbdev->bo);
		ret = PTR_ERR(fb);
		goto fail;
	}

	mutex_lock(&dev->struct_mutex);

	/*
	 * NOTE: if we can be guaranteed to be able to map buffer
	 * in panic (ie. lock-safe, etc) we could avoid pinning the
	 * buffer now:
	 */
	ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
	if (ret) {
		dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);
		goto fail_unlock;
	}

	fbi = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(fbi)) {
		dev_err(dev->dev, "failed to allocate fb info\n");
		ret = PTR_ERR(fbi);
		goto fail_unlock;
	}

	DBG("fbi=%p, dev=%p", fbi, dev);

	fbdev->fb = fb;
	helper->fb = fb;

	fbi->par = helper;
	fbi->flags = FBINFO_DEFAULT;
	fbi->fbops = &msm_fb_ops;

	strcpy(fbi->fix.id, "msm");

	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);

	dev->mode_config.fb_base = paddr;

	fbi->screen_base = msm_gem_vaddr_locked(fbdev->bo);
	if (IS_ERR(fbi->screen_base)) {
		ret = PTR_ERR(fbi->screen_base);
		goto fail_unlock;
	}
	fbi->screen_size = fbdev->bo->size;
	fbi->fix.smem_start = paddr;
	fbi->fix.smem_len = fbdev->bo->size;

	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);

	mutex_unlock(&dev->struct_mutex);

	return 0;

fail_unlock:
	mutex_unlock(&dev->struct_mutex);
fail:

	if (ret) {
		if (fb) {
			drm_framebuffer_unregister_private(fb);
			drm_framebuffer_remove(fb);
		}
	}

	return ret;
}

static void msm_crtc_fb_gamma_set(struct drm_crtc *crtc,
		u16 red, u16 green, u16 blue, int regno)
{
	DBG("fbdev: set gamma");
}

static void msm_crtc_fb_gamma_get(struct drm_crtc *crtc,
		u16 *red, u16 *green, u16 *blue, int regno)
{
	DBG("fbdev: get gamma");
}

static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
	.gamma_set = msm_crtc_fb_gamma_set,
	.gamma_get = msm_crtc_fb_gamma_get,
	.fb_probe = msm_fbdev_create,
};

/* initialize fbdev helper */
struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_fbdev *fbdev = NULL;
	struct drm_fb_helper *helper;
	int ret;

	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev)
		goto fail;

	helper = &fbdev->base;

	drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);

	ret = drm_fb_helper_init(dev, helper,
			priv->num_crtcs, priv->num_connectors);
	if (ret) {
		dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
		goto fail;
	}

	ret = drm_fb_helper_single_add_all_connectors(helper);
	if (ret)
		goto fini;

	ret = drm_fb_helper_initial_config(helper, 32);
	if (ret)
		goto fini;

	priv->fbdev = helper;

	return helper;

fini:
	drm_fb_helper_fini(helper);
fail:
	kfree(fbdev);
	return NULL;
}

void msm_fbdev_free(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_fb_helper *helper = priv->fbdev;
	struct msm_fbdev *fbdev;

	DBG();

	drm_fb_helper_unregister_fbi(helper);
	drm_fb_helper_release_fbi(helper);

	drm_fb_helper_fini(helper);

	fbdev = to_msm_fbdev(priv->fbdev);

	/* this will free the backing object */
	if (fbdev->fb) {
		drm_framebuffer_unregister_private(fbdev->fb);
		drm_framebuffer_remove(fbdev->fb);
	}

	kfree(fbdev);

	priv->fbdev = NULL;
}
Commit	Line	Data
c8afe684 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include "msm_drv.h"
	19
	20	#include "drm_crtc.h"
	21	#include "drm_fb_helper.h"
8f67da33 HL	22	#include "msm_gem.h"
	23
	24	extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
	25	struct vm_area_struct *vma);
	26	static int msm_fbdev_mmap(struct fb_info info, struct vm_area_struct vma);
c8afe684 RC	27
	28	/*
	29	* fbdev funcs, to implement legacy fbdev interface on top of drm driver
	30	*/
	31
	32	#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)
	33
	34	struct msm_fbdev {
	35	struct drm_fb_helper base;
	36	struct drm_framebuffer *fb;
	37	struct drm_gem_object *bo;
	38	};
	39
	40	static struct fb_ops msm_fb_ops = {
	41	.owner = THIS_MODULE,
	42
	43	/* Note: to properly handle manual update displays, we wrap the
	44	* basic fbdev ops which write to the framebuffer
	45	*/
778014f0 AT	46	.fb_read = drm_fb_helper_sys_read,
	47	.fb_write = drm_fb_helper_sys_write,
	48	.fb_fillrect = drm_fb_helper_sys_fillrect,
	49	.fb_copyarea = drm_fb_helper_sys_copyarea,
	50	.fb_imageblit = drm_fb_helper_sys_imageblit,
8f67da33	51	.fb_mmap = msm_fbdev_mmap,
c8afe684 RC	52
	53	.fb_check_var = drm_fb_helper_check_var,
	54	.fb_set_par = drm_fb_helper_set_par,
	55	.fb_pan_display = drm_fb_helper_pan_display,
	56	.fb_blank = drm_fb_helper_blank,
	57	.fb_setcmap = drm_fb_helper_setcmap,
	58	};
	59
8f67da33 HL	60	static int msm_fbdev_mmap(struct fb_info info, struct vm_area_struct vma)
	61	{
	62	struct drm_fb_helper helper = (struct drm_fb_helper )info->par;
	63	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	64	struct drm_gem_object *drm_obj = fbdev->bo;
8f67da33 HL	65	int ret = 0;
8f67da33 HL	66
8f67da33	67	ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
8f67da33 HL	68	if (ret) {
	69	pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
	70	return ret;
	71	}
	72
	73	return msm_gem_mmap_obj(drm_obj, vma);
	74	}
	75
c8afe684 RC	76	static int msm_fbdev_create(struct drm_fb_helper *helper,
	77	struct drm_fb_helper_surface_size *sizes)
	78	{
	79	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	80	struct drm_device *dev = helper->dev;
	81	struct drm_framebuffer *fb = NULL;
	82	struct fb_info *fbi = NULL;
	83	struct drm_mode_fb_cmd2 mode_cmd = {0};
2557e2d7	84	uint32_t paddr;
c8afe684 RC	85	int ret, size;
c8afe684 RC	86
c8afe684 RC	87	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
	88	sizes->surface_height, sizes->surface_bpp,
	89	sizes->fb_width, sizes->fb_height);
	90
	91	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	92	sizes->surface_depth);
	93
	94	mode_cmd.width = sizes->surface_width;
	95	mode_cmd.height = sizes->surface_height;
	96
	97	mode_cmd.pitches[0] = align_pitch(
	98	mode_cmd.width, sizes->surface_bpp);
	99
	100	/* allocate backing bo */
	101	size = mode_cmd.pitches[0] * mode_cmd.height;
	102	DBG("allocating %d bytes for fb %d", size, dev->primary->index);
	103	mutex_lock(&dev->struct_mutex);
072f1f91 RC	104	fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT \|
072f1f91 RC	105	MSM_BO_WC \| MSM_BO_STOLEN);
c8afe684 RC	106	mutex_unlock(&dev->struct_mutex);
	107	if (IS_ERR(fbdev->bo)) {
	108	ret = PTR_ERR(fbdev->bo);
	109	fbdev->bo = NULL;
	110	dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret);
	111	goto fail;
	112	}
	113
	114	fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
	115	if (IS_ERR(fb)) {
	116	dev_err(dev->dev, "failed to allocate fb\n");
	117	/* note: if fb creation failed, we can't rely on fb destroy
	118	* to unref the bo:
	119	*/
dee2eed2	120	drm_gem_object_unreference_unlocked(fbdev->bo);
c8afe684 RC	121	ret = PTR_ERR(fb);
	122	goto fail;
	123	}
	124
	125	mutex_lock(&dev->struct_mutex);
	126
8f67da33 HL	127	/*
	128	* NOTE: if we can be guaranteed to be able to map buffer
	129	* in panic (ie. lock-safe, etc) we could avoid pinning the
	130	* buffer now:
	131	*/
	132	ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
	133	if (ret) {
	134	dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);
0d9509d2	135	goto fail_unlock;
8f67da33	136	}
c8afe684	137
778014f0 AT	138	fbi = drm_fb_helper_alloc_fbi(helper);
778014f0 AT	139	if (IS_ERR(fbi)) {
c8afe684	140	dev_err(dev->dev, "failed to allocate fb info\n");
778014f0	141	ret = PTR_ERR(fbi);
c8afe684 RC	142	goto fail_unlock;
	143	}
	144
	145	DBG("fbi=%p, dev=%p", fbi, dev);
	146
	147	fbdev->fb = fb;
	148	helper->fb = fb;
c8afe684 RC	149
	150	fbi->par = helper;
	151	fbi->flags = FBINFO_DEFAULT;
	152	fbi->fbops = &msm_fb_ops;
	153
	154	strcpy(fbi->fix.id, "msm");
	155
c8afe684 RC	156	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
	157	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
	158
	159	dev->mode_config.fb_base = paddr;
	160
	161	fbi->screen_base = msm_gem_vaddr_locked(fbdev->bo);
69a834c2 RC	162	if (IS_ERR(fbi->screen_base)) {
	163	ret = PTR_ERR(fbi->screen_base);
	164	goto fail_unlock;
	165	}
c8afe684 RC	166	fbi->screen_size = fbdev->bo->size;
	167	fbi->fix.smem_start = paddr;
	168	fbi->fix.smem_len = fbdev->bo->size;
	169
	170	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	171	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);
	172
	173	mutex_unlock(&dev->struct_mutex);
	174
	175	return 0;
	176
	177	fail_unlock:
	178	mutex_unlock(&dev->struct_mutex);
	179	fail:
	180
	181	if (ret) {
c8afe684 RC	182	if (fb) {
	183	drm_framebuffer_unregister_private(fb);
	184	drm_framebuffer_remove(fb);
	185	}
	186	}
	187
	188	return ret;
	189	}
	190
	191	static void msm_crtc_fb_gamma_set(struct drm_crtc *crtc,
	192	u16 red, u16 green, u16 blue, int regno)
	193	{
	194	DBG("fbdev: set gamma");
	195	}
	196
	197	static void msm_crtc_fb_gamma_get(struct drm_crtc *crtc,
	198	u16 red, u16 green, u16 *blue, int regno)
	199	{
	200	DBG("fbdev: get gamma");
	201	}
	202
3a493879	203	static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
c8afe684 RC	204	.gamma_set = msm_crtc_fb_gamma_set,
	205	.gamma_get = msm_crtc_fb_gamma_get,
	206	.fb_probe = msm_fbdev_create,
	207	};
	208
	209	/* initialize fbdev helper */
	210	struct drm_fb_helper msm_fbdev_init(struct drm_device dev)
	211	{
	212	struct msm_drm_private *priv = dev->dev_private;
	213	struct msm_fbdev *fbdev = NULL;
	214	struct drm_fb_helper *helper;
8f67da33	215	int ret;
c8afe684 RC	216
	217	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	218	if (!fbdev)
	219	goto fail;
	220
	221	helper = &fbdev->base;
	222
10a23102	223	drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);
c8afe684 RC	224
	225	ret = drm_fb_helper_init(dev, helper,
	226	priv->num_crtcs, priv->num_connectors);
	227	if (ret) {
	228	dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
	229	goto fail;
	230	}
	231
01934c2a TR	232	ret = drm_fb_helper_single_add_all_connectors(helper);
	233	if (ret)
	234	goto fini;
c8afe684	235
01934c2a TR	236	ret = drm_fb_helper_initial_config(helper, 32);
	237	if (ret)
	238	goto fini;
c8afe684 RC	239
	240	priv->fbdev = helper;
	241
	242	return helper;
	243
01934c2a TR	244	fini:
01934c2a TR	245	drm_fb_helper_fini(helper);
c8afe684 RC	246	fail:
	247	kfree(fbdev);
	248	return NULL;
	249	}
	250
	251	void msm_fbdev_free(struct drm_device *dev)
	252	{
	253	struct msm_drm_private *priv = dev->dev_private;
	254	struct drm_fb_helper *helper = priv->fbdev;
	255	struct msm_fbdev *fbdev;
c8afe684 RC	256
	257	DBG();
	258
778014f0 AT	259	drm_fb_helper_unregister_fbi(helper);
778014f0 AT	260	drm_fb_helper_release_fbi(helper);
c8afe684 RC	261
	262	drm_fb_helper_fini(helper);
	263
	264	fbdev = to_msm_fbdev(priv->fbdev);
	265
	266	/* this will free the backing object */
	267	if (fbdev->fb) {
	268	drm_framebuffer_unregister_private(fbdev->fb);
	269	drm_framebuffer_remove(fbdev->fb);
	270	}
	271
	272	kfree(fbdev);
	273
	274	priv->fbdev = NULL;
	275	}