--- /dev/null
+/*
+ * 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 = fb_sys_read,
+ .fb_write = fb_sys_write,
+ .fb_fillrect = sys_fillrect,
+ .fb_copyarea = sys_copyarea,
+ .fb_imageblit = 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;
+ struct drm_device *dev = helper->dev;
+ int ret = 0;
+
+ if (drm_device_is_unplugged(dev))
+ return -ENODEV;
+
+ mutex_lock(&dev->struct_mutex);
+
+ ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
+
+ mutex_unlock(&dev->struct_mutex);
+
+ 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(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 = 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) {
+ 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;
+
+ 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;
+ 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;
+}
Code Review / kvmfornfv.git / blobdiff