Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 223 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
new file mode 100644
index 000000000..767afd2bf
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -0,0 +1,223 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* exynos_drm_fbdev.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 <linux/console.h>
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/exynos_drm.h>
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_fbdev.h"
+
+#define MAX_CONNECTOR		4
+#define PREFERRED_BPP		32
+
+#define to_exynos_fbdev(x)	container_of(x, struct exynos_drm_fbdev,\
+				drm_fb_helper)
+
+struct exynos_drm_fbdev {
+	struct drm_fb_helper	drm_fb_helper;
+	struct exynos_drm_gem	*exynos_gem;
+};
+
+static int exynos_drm_fb_mmap(struct fb_info *info,
+			struct vm_area_struct *vma)
+{
+	struct drm_fb_helper *helper = info->par;
+	struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
+	struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
+
+	return drm_gem_prime_mmap(&exynos_gem->base, vma);
+}
+
+static const struct fb_ops exynos_drm_fb_ops = {
+	.owner		= THIS_MODULE,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	.fb_mmap        = exynos_drm_fb_mmap,
+	.fb_fillrect	= drm_fb_helper_cfb_fillrect,
+	.fb_copyarea	= drm_fb_helper_cfb_copyarea,
+	.fb_imageblit	= drm_fb_helper_cfb_imageblit,
+};
+
+static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
+				   struct drm_fb_helper_surface_size *sizes,
+				   struct exynos_drm_gem *exynos_gem)
+{
+	struct fb_info *fbi;
+	struct drm_framebuffer *fb = helper->fb;
+	unsigned int size = fb->width * fb->height * fb->format->cpp[0];
+	unsigned long offset;
+
+	fbi = drm_fb_helper_alloc_fbi(helper);
+	if (IS_ERR(fbi)) {
+		DRM_DEV_ERROR(to_dma_dev(helper->dev),
+			      "failed to allocate fb info.\n");
+		return PTR_ERR(fbi);
+	}
+
+	fbi->fbops = &exynos_drm_fb_ops;
+
+	drm_fb_helper_fill_info(fbi, helper, sizes);
+
+	offset = fbi->var.xoffset * fb->format->cpp[0];
+	offset += fbi->var.yoffset * fb->pitches[0];
+
+	fbi->screen_buffer = exynos_gem->kvaddr + offset;
+	fbi->screen_size = size;
+	fbi->fix.smem_len = size;
+
+	return 0;
+}
+
+static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
+				    struct drm_fb_helper_surface_size *sizes)
+{
+	struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
+	struct exynos_drm_gem *exynos_gem;
+	struct drm_device *dev = helper->dev;
+	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+	unsigned long size;
+	int ret;
+
+	DRM_DEV_DEBUG_KMS(dev->dev,
+			  "surface width(%d), height(%d) and bpp(%d\n",
+			  sizes->surface_width, sizes->surface_height,
+			  sizes->surface_bpp);
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+	mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+
+	exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_WC, size, true);
+	if (IS_ERR(exynos_gem))
+		return PTR_ERR(exynos_gem);
+
+	exynos_fbdev->exynos_gem = exynos_gem;
+
+	helper->fb =
+		exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
+	if (IS_ERR(helper->fb)) {
+		DRM_DEV_ERROR(dev->dev, "failed to create drm framebuffer.\n");
+		ret = PTR_ERR(helper->fb);
+		goto err_destroy_gem;
+	}
+
+	ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
+	if (ret < 0)
+		goto err_destroy_framebuffer;
+
+	return ret;
+
+err_destroy_framebuffer:
+	drm_framebuffer_cleanup(helper->fb);
+err_destroy_gem:
+	exynos_drm_gem_destroy(exynos_gem);
+
+	/*
+	 * if failed, all resources allocated above would be released by
+	 * drm_mode_config_cleanup() when drm_load() had been called prior
+	 * to any specific driver such as fimd or hdmi driver.
+	 */
+
+	return ret;
+}
+
+static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
+	.fb_probe =	exynos_drm_fbdev_create,
+};
+
+int exynos_drm_fbdev_init(struct drm_device *dev)
+{
+	struct exynos_drm_fbdev *fbdev;
+	struct exynos_drm_private *private = dev->dev_private;
+	struct drm_fb_helper *helper;
+	int ret;
+
+	if (!dev->mode_config.num_crtc)
+		return 0;
+
+	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
+	if (!fbdev)
+		return -ENOMEM;
+
+	private->fb_helper = helper = &fbdev->drm_fb_helper;
+
+	drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);
+
+	ret = drm_fb_helper_init(dev, helper);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev->dev,
+			      "failed to initialize drm fb helper.\n");
+		goto err_init;
+	}
+
+	ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev->dev,
+			      "failed to set up hw configuration.\n");
+		goto err_setup;
+	}
+
+	return 0;
+
+err_setup:
+	drm_fb_helper_fini(helper);
+
+err_init:
+	private->fb_helper = NULL;
+	kfree(fbdev);
+
+	return ret;
+}
+
+static void exynos_drm_fbdev_destroy(struct drm_device *dev,
+				      struct drm_fb_helper *fb_helper)
+{
+	struct drm_framebuffer *fb;
+
+	/* release drm framebuffer and real buffer */
+	if (fb_helper->fb && fb_helper->fb->funcs) {
+		fb = fb_helper->fb;
+		if (fb)
+			drm_framebuffer_remove(fb);
+	}
+
+	drm_fb_helper_unregister_fbi(fb_helper);
+
+	drm_fb_helper_fini(fb_helper);
+}
+
+void exynos_drm_fbdev_fini(struct drm_device *dev)
+{
+	struct exynos_drm_private *private = dev->dev_private;
+	struct exynos_drm_fbdev *fbdev;
+
+	if (!private || !private->fb_helper)
+		return;
+
+	fbdev = to_exynos_fbdev(private->fb_helper);
+
+	exynos_drm_fbdev_destroy(dev, private->fb_helper);
+	kfree(fbdev);
+	private->fb_helper = NULL;
+}
+