--- /dev/null
+/* exynos_drm_fb.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Authors:
+ * Inki Dae <inki.dae@samsung.com>
+ * Joonyoung Shim <jy0922.shim@samsung.com>
+ * Seung-Woo Kim <sw0312.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <uapi/drm/exynos_drm.h>
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_fbdev.h"
+#include "exynos_drm_gem.h"
+#include "exynos_drm_iommu.h"
+#include "exynos_drm_crtc.h"
+
+#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
+
+/*
+ * exynos specific framebuffer structure.
+ *
+ * @fb: drm framebuffer obejct.
+ * @buf_cnt: a buffer count to drm framebuffer.
+ * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
+ */
+struct exynos_drm_fb {
+ struct drm_framebuffer fb;
+ unsigned int buf_cnt;
+ struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
+};
+
+static int check_fb_gem_memory_type(struct drm_device *drm_dev,
+ struct exynos_drm_gem_obj *exynos_gem_obj)
+{
+ unsigned int flags;
+
+ /*
+ * if exynos drm driver supports iommu then framebuffer can use
+ * all the buffer types.
+ */
+ if (is_drm_iommu_supported(drm_dev))
+ return 0;
+
+ flags = exynos_gem_obj->flags;
+
+ /*
+ * without iommu support, not support physically non-continuous memory
+ * for framebuffer.
+ */
+ if (IS_NONCONTIG_BUFFER(flags)) {
+ DRM_ERROR("cannot use this gem memory type for fb.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
+{
+ struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
+ unsigned int i;
+
+ /* make sure that overlay data are updated before relesing fb. */
+ exynos_drm_crtc_complete_scanout(fb);
+
+ drm_framebuffer_cleanup(fb);
+
+ for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
+ struct drm_gem_object *obj;
+
+ if (exynos_fb->exynos_gem_obj[i] == NULL)
+ continue;
+
+ obj = &exynos_fb->exynos_gem_obj[i]->base;
+ drm_gem_object_unreference_unlocked(obj);
+ }
+
+ kfree(exynos_fb);
+ exynos_fb = NULL;
+}
+
+static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
+ struct drm_file *file_priv,
+ unsigned int *handle)
+{
+ struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
+
+ /* This fb should have only one gem object. */
+ if (WARN_ON(exynos_fb->buf_cnt != 1))
+ return -EINVAL;
+
+ return drm_gem_handle_create(file_priv,
+ &exynos_fb->exynos_gem_obj[0]->base, handle);
+}
+
+static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
+ struct drm_file *file_priv, unsigned flags,
+ unsigned color, struct drm_clip_rect *clips,
+ unsigned num_clips)
+{
+ /* TODO */
+
+ return 0;
+}
+
+static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
+ .destroy = exynos_drm_fb_destroy,
+ .create_handle = exynos_drm_fb_create_handle,
+ .dirty = exynos_drm_fb_dirty,
+};
+
+void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
+ unsigned int cnt)
+{
+ struct exynos_drm_fb *exynos_fb;
+
+ exynos_fb = to_exynos_fb(fb);
+
+ exynos_fb->buf_cnt = cnt;
+}
+
+unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
+{
+ struct exynos_drm_fb *exynos_fb;
+
+ exynos_fb = to_exynos_fb(fb);
+
+ return exynos_fb->buf_cnt;
+}
+
+struct drm_framebuffer *
+exynos_drm_framebuffer_init(struct drm_device *dev,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object *obj)
+{
+ struct exynos_drm_fb *exynos_fb;
+ struct exynos_drm_gem_obj *exynos_gem_obj;
+ int ret;
+
+ exynos_gem_obj = to_exynos_gem_obj(obj);
+
+ ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
+ if (!exynos_fb)
+ return ERR_PTR(-ENOMEM);
+
+ drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
+ exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
+
+ ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
+ if (ret) {
+ kfree(exynos_fb);
+ DRM_ERROR("failed to initialize framebuffer\n");
+ return ERR_PTR(ret);
+ }
+
+ return &exynos_fb->fb;
+}
+
+static struct drm_framebuffer *
+exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
+ struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ struct drm_gem_object *obj;
+ struct exynos_drm_gem_obj *exynos_gem_obj;
+ struct exynos_drm_fb *exynos_fb;
+ int i, ret;
+
+ exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
+ if (!exynos_fb)
+ return ERR_PTR(-ENOMEM);
+
+ obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
+ if (!obj) {
+ DRM_ERROR("failed to lookup gem object\n");
+ ret = -ENOENT;
+ goto err_free;
+ }
+
+ drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
+ exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
+ exynos_fb->buf_cnt = drm_format_num_planes(mode_cmd->pixel_format);
+
+ DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
+
+ for (i = 1; i < exynos_fb->buf_cnt; i++) {
+ obj = drm_gem_object_lookup(dev, file_priv,
+ mode_cmd->handles[i]);
+ if (!obj) {
+ DRM_ERROR("failed to lookup gem object\n");
+ ret = -ENOENT;
+ exynos_fb->buf_cnt = i;
+ goto err_unreference;
+ }
+
+ exynos_gem_obj = to_exynos_gem_obj(obj);
+ exynos_fb->exynos_gem_obj[i] = exynos_gem_obj;
+
+ ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
+ if (ret < 0)
+ goto err_unreference;
+ }
+
+ ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
+ if (ret) {
+ DRM_ERROR("failed to init framebuffer.\n");
+ goto err_unreference;
+ }
+
+ return &exynos_fb->fb;
+
+err_unreference:
+ for (i = 0; i < exynos_fb->buf_cnt; i++) {
+ struct drm_gem_object *obj;
+
+ obj = &exynos_fb->exynos_gem_obj[i]->base;
+ if (obj)
+ drm_gem_object_unreference_unlocked(obj);
+ }
+err_free:
+ kfree(exynos_fb);
+ return ERR_PTR(ret);
+}
+
+struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
+ int index)
+{
+ struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
+ struct exynos_drm_gem_buf *buffer;
+
+ if (index >= MAX_FB_BUFFER)
+ return NULL;
+
+ buffer = exynos_fb->exynos_gem_obj[index]->buffer;
+ if (!buffer)
+ return NULL;
+
+ DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
+
+ return buffer;
+}
+
+static void exynos_drm_output_poll_changed(struct drm_device *dev)
+{
+ struct exynos_drm_private *private = dev->dev_private;
+ struct drm_fb_helper *fb_helper = private->fb_helper;
+
+ if (fb_helper)
+ drm_fb_helper_hotplug_event(fb_helper);
+ else
+ exynos_drm_fbdev_init(dev);
+}
+
+static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
+ .fb_create = exynos_user_fb_create,
+ .output_poll_changed = exynos_drm_output_poll_changed,
+};
+
+void exynos_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 = &exynos_drm_mode_config_funcs;
+}
Code Review / kvmfornfv.git / blobdiff