/* * 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" /* * 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 = fb_sys_read,	.fb_write = fb_sys_write,	.fb_fillrect = sys_fillrect,	.fb_copyarea = sys_copyarea,	.fb_imageblit = sys_imageblit, 	.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_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};	dma_addr_t paddr;	int ret, size; 	/* only doing ARGB32 since this is what is needed to alpha-blend	 * with video overlays:	 */	sizes->surface_bpp = 32;	sizes->surface_depth = 32; 	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);	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(fbdev->bo);		ret = PTR_ERR(fb);		goto fail;	} 	mutex_lock(&dev->struct_mutex); 	/* TODO implement our own fb_mmap so we don't need this: */	msm_gem_get_iova_locked(fbdev->bo, 0, &paddr); 	fbi = framebuffer_alloc(0, dev->dev);	if (!fbi) {		dev_err(dev->dev, "failed to allocate fb info\n");		ret = -ENOMEM;		goto fail_unlock;	} 	DBG("fbi=%p, dev=%p", fbi, dev); 	fbdev->fb = fb;	helper->fb = fb;	helper->fbdev = fbi; 	fbi->par = helper;	fbi->flags = FBINFO_DEFAULT;	fbi->fbops = &msm_fb_ops; 	strcpy(fbi->fix.id, "msm"); 	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);	if (ret) {		ret = -ENOMEM;		goto fail_unlock;	} 	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);	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 (fbi)			framebuffer_release(fbi);		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 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 = 0; 	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);	if (!fbdev)		goto fail; 	helper = &fbdev->base; 	helper->funcs = &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;	} 	drm_fb_helper_single_add_all_connectors(helper); 	/* disable all the possible outputs/crtcs before entering KMS mode */	drm_helper_disable_unused_functions(dev); 	drm_fb_helper_initial_config(helper, 32); 	priv->fbdev = helper; 	return 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;	struct fb_info *fbi; 	DBG(); 	fbi = helper->fbdev; 	/* only cleanup framebuffer if it is present */	if (fbi) {		unregister_framebuffer(fbi);		framebuffer_release(fbi);	} 	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;}