Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 226 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..a379c8ca4
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -0,0 +1,226 @@
+// 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/fb.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_prime.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
+
+static int exynos_drm_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct drm_fb_helper *helper = info->par;
+	struct drm_gem_object *obj = drm_gem_fb_get_obj(helper->fb, 0);
+
+	return drm_gem_prime_mmap(obj, vma);
+}
+
+static void exynos_drm_fb_destroy(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
+
+	drm_fb_helper_fini(fb_helper);
+
+	drm_framebuffer_remove(fb);
+
+	drm_client_release(&fb_helper->client);
+	drm_fb_helper_unprepare(fb_helper);
+	kfree(fb_helper);
+}
+
+static const struct fb_ops exynos_drm_fb_ops = {
+	.owner		= THIS_MODULE,
+	__FB_DEFAULT_DMAMEM_OPS_RDWR,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	__FB_DEFAULT_DMAMEM_OPS_DRAW,
+	.fb_mmap        = exynos_drm_fb_mmap,
+	.fb_destroy	= exynos_drm_fb_destroy,
+};
+
+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_info(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->flags |= FBINFO_VIRTFB;
+	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_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);
+
+	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 0;
+
+err_destroy_framebuffer:
+	drm_framebuffer_cleanup(helper->fb);
+	helper->fb = NULL;
+err_destroy_gem:
+	exynos_drm_gem_destroy(exynos_gem);
+	return ret;
+}
+
+static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
+	.fb_probe =	exynos_drm_fbdev_create,
+};
+
+/*
+ * struct drm_client
+ */
+
+static void exynos_drm_fbdev_client_unregister(struct drm_client_dev *client)
+{
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+
+	if (fb_helper->info) {
+		drm_fb_helper_unregister_info(fb_helper);
+	} else {
+		drm_client_release(&fb_helper->client);
+		drm_fb_helper_unprepare(fb_helper);
+		kfree(fb_helper);
+	}
+}
+
+static int exynos_drm_fbdev_client_restore(struct drm_client_dev *client)
+{
+	drm_fb_helper_lastclose(client->dev);
+
+	return 0;
+}
+
+static int exynos_drm_fbdev_client_hotplug(struct drm_client_dev *client)
+{
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+	struct drm_device *dev = client->dev;
+	int ret;
+
+	if (dev->fb_helper)
+		return drm_fb_helper_hotplug_event(dev->fb_helper);
+
+	ret = drm_fb_helper_init(dev, fb_helper);
+	if (ret)
+		goto err_drm_err;
+
+	if (!drm_drv_uses_atomic_modeset(dev))
+		drm_helper_disable_unused_functions(dev);
+
+	ret = drm_fb_helper_initial_config(fb_helper);
+	if (ret)
+		goto err_drm_fb_helper_fini;
+
+	return 0;
+
+err_drm_fb_helper_fini:
+	drm_fb_helper_fini(fb_helper);
+err_drm_err:
+	drm_err(dev, "Failed to setup fbdev emulation (ret=%d)\n", ret);
+	return ret;
+}
+
+static const struct drm_client_funcs exynos_drm_fbdev_client_funcs = {
+	.owner		= THIS_MODULE,
+	.unregister	= exynos_drm_fbdev_client_unregister,
+	.restore	= exynos_drm_fbdev_client_restore,
+	.hotplug	= exynos_drm_fbdev_client_hotplug,
+};
+
+void exynos_drm_fbdev_setup(struct drm_device *dev)
+{
+	struct drm_fb_helper *fb_helper;
+	int ret;
+
+	drm_WARN(dev, !dev->registered, "Device has not been registered.\n");
+	drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n");
+
+	fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
+	if (!fb_helper)
+		return;
+	drm_fb_helper_prepare(dev, fb_helper, PREFERRED_BPP, &exynos_drm_fb_helper_funcs);
+
+	ret = drm_client_init(dev, &fb_helper->client, "fbdev", &exynos_drm_fbdev_client_funcs);
+	if (ret)
+		goto err_drm_client_init;
+
+	drm_client_register(&fb_helper->client);
+
+	return;
+
+err_drm_client_init:
+	drm_fb_helper_unprepare(fb_helper);
+	kfree(fb_helper);
+}