/* * Copyright (C) 2013 Red Hat * Author: Rob Clark * * 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 . */ #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}; uint32_t paddr; int ret, size; sizes->surface_bpp = 32; sizes->surface_depth = 24; 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 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 = 0; 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; } 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; }