Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 182 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
new file mode 100644
index 000000000..97f2dee2d
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* 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>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/exynos_drm.h>
+
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_fbdev.h"
+
+static int check_fb_gem_memory_type(struct drm_device *drm_dev,
+				    struct exynos_drm_gem *exynos_gem)
+{
+	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->flags;
+
+	/*
+	 * Physically non-contiguous memory type for framebuffer is not
+	 * supported without IOMMU.
+	 */
+	if (IS_NONCONTIG_BUFFER(flags)) {
+		DRM_DEV_ERROR(drm_dev->dev,
+			      "Non-contiguous GEM memory is not supported.\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
+	.destroy	= drm_gem_fb_destroy,
+	.create_handle	= drm_gem_fb_create_handle,
+};
+
+struct drm_framebuffer *
+exynos_drm_framebuffer_init(struct drm_device *dev,
+			    const struct drm_mode_fb_cmd2 *mode_cmd,
+			    struct exynos_drm_gem **exynos_gem,
+			    int count)
+{
+	struct drm_framebuffer *fb;
+	int i;
+	int ret;
+
+	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+	if (!fb)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < count; i++) {
+		ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
+		if (ret < 0)
+			goto err;
+
+		fb->obj[i] = &exynos_gem[i]->base;
+	}
+
+	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
+
+	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev->dev,
+			      "failed to initialize framebuffer\n");
+		goto err;
+	}
+
+	return fb;
+
+err:
+	kfree(fb);
+	return ERR_PTR(ret);
+}
+
+static struct drm_framebuffer *
+exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
+		      const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
+	struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
+	struct drm_framebuffer *fb;
+	int i;
+	int ret;
+
+	for (i = 0; i < info->num_planes; i++) {
+		unsigned int height = (i == 0) ? mode_cmd->height :
+				     DIV_ROUND_UP(mode_cmd->height, info->vsub);
+		unsigned long size = height * mode_cmd->pitches[i] +
+				     mode_cmd->offsets[i];
+
+		exynos_gem[i] = exynos_drm_gem_get(file_priv,
+						   mode_cmd->handles[i]);
+		if (!exynos_gem[i]) {
+			DRM_DEV_ERROR(dev->dev,
+				      "failed to lookup gem object\n");
+			ret = -ENOENT;
+			goto err;
+		}
+
+		if (size > exynos_gem[i]->size) {
+			i++;
+			ret = -EINVAL;
+			goto err;
+		}
+	}
+
+	fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
+	if (IS_ERR(fb)) {
+		ret = PTR_ERR(fb);
+		goto err;
+	}
+
+	return fb;
+
+err:
+	while (i--)
+		exynos_drm_gem_put(exynos_gem[i]);
+
+	return ERR_PTR(ret);
+}
+
+dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
+{
+	struct exynos_drm_gem *exynos_gem;
+
+	if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
+		return 0;
+
+	exynos_gem = to_exynos_gem(fb->obj[index]);
+	return exynos_gem->dma_addr + fb->offsets[index];
+}
+
+static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
+	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
+	.fb_create = exynos_user_fb_create,
+	.output_poll_changed = drm_fb_helper_output_poll_changed,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+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;
+	dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
+
+	dev->mode_config.normalize_zpos = true;
+}