Merge tag 'drm-misc-next-2023-05-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 6.5:

UAPI Changes:

Cross-subsystem Changes:
 - arch: Consolidate <asm/fb.h>

Core Changes:
 - aperture: Ignore firmware framebuffers with non-primary devices
 - fbdev: Use fbdev's I/O helpers
 - sysfs: Expose DRM connector ID
 - tests: More tests for drm_rect

Driver Changes:
 - armada: Implement fbdev emulation as a client
 - bridge:
   - fsl-ldb: Support i.MX6SX
   - lt9211: Remove blanking packets
   - lt9611: Remove blanking packets
   - tc358768: Implement input bus formats reporting, fix various
     timings and clocks settings
   - ti-sn65dsi86: Implement wait_hpd_asserted
 - nouveau: Improve NULL pointer checks before dereference
 - panel:
   - nt36523: Support Lenovo J606F
   - st7703: Support Anbernic RG353V-V2
   - new panels: InnoLux G070ACE-L01
 - sun4i: Fix MIPI-DSI dotclock
 - vc4: RGB Range toggle property, BT601 and BT2020 support for HDMI
 - vkms: Convert to drmm helpers, Add reflection and rotation support

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/2pxmxdzsk2ekjy6xvbpj67zrhtwvkkhfspuvdm5pfm5i54hed6@sooct7yq6z4w

1 files changed, 4 insertions, 170 deletions

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 6bb1b8b27d7a..f0e9549b6bd7 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -714,95 +714,6 @@ void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagerefli
 }
 EXPORT_SYMBOL(drm_fb_helper_deferred_io);
 
-typedef ssize_t (*drm_fb_helper_read_screen)(struct fb_info *info, char __user *buf,
-					     size_t count, loff_t pos);
-
-static ssize_t __drm_fb_helper_read(struct fb_info *info, char __user *buf, size_t count,
-				    loff_t *ppos, drm_fb_helper_read_screen read_screen)
-{
-	loff_t pos = *ppos;
-	size_t total_size;
-	ssize_t ret;
-
-	if (info->screen_size)
-		total_size = info->screen_size;
-	else
-		total_size = info->fix.smem_len;
-
-	if (pos >= total_size)
-		return 0;
-	if (count >= total_size)
-		count = total_size;
-	if (total_size - count < pos)
-		count = total_size - pos;
-
-	if (info->fbops->fb_sync)
-		info->fbops->fb_sync(info);
-
-	ret = read_screen(info, buf, count, pos);
-	if (ret > 0)
-		*ppos += ret;
-
-	return ret;
-}
-
-typedef ssize_t (*drm_fb_helper_write_screen)(struct fb_info *info, const char __user *buf,
-					      size_t count, loff_t pos);
-
-static ssize_t __drm_fb_helper_write(struct fb_info *info, const char __user *buf, size_t count,
-				     loff_t *ppos, drm_fb_helper_write_screen write_screen)
-{
-	loff_t pos = *ppos;
-	size_t total_size;
-	ssize_t ret;
-	int err = 0;
-
-	if (info->screen_size)
-		total_size = info->screen_size;
-	else
-		total_size = info->fix.smem_len;
-
-	if (pos > total_size)
-		return -EFBIG;
-	if (count > total_size) {
-		err = -EFBIG;
-		count = total_size;
-	}
-	if (total_size - count < pos) {
-		if (!err)
-			err = -ENOSPC;
-		count = total_size - pos;
-	}
-
-	if (info->fbops->fb_sync)
-		info->fbops->fb_sync(info);
-
-	/*
-	 * Copy to framebuffer even if we already logged an error. Emulates
-	 * the behavior of the original fbdev implementation.
-	 */
-	ret = write_screen(info, buf, count, pos);
-	if (ret < 0)
-		return ret; /* return last error, if any */
-	else if (!ret)
-		return err; /* return previous error, if any */
-
-	*ppos += ret;
-
-	return ret;
-}
-
-static ssize_t drm_fb_helper_read_screen_buffer(struct fb_info *info, char __user *buf,
-						size_t count, loff_t pos)
-{
-	const char *src = info->screen_buffer + pos;
-
-	if (copy_to_user(buf, src, count))
-		return -EFAULT;
-
-	return count;
-}
-
 /**
  * drm_fb_helper_sys_read - Implements struct &fb_ops.fb_read for system memory
  * @info: fb_info struct pointer
@@ -816,21 +727,10 @@ static ssize_t drm_fb_helper_read_screen_buffer(struct fb_info *info, char __use
 ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
 			       size_t count, loff_t *ppos)
 {
-	return __drm_fb_helper_read(info, buf, count, ppos, drm_fb_helper_read_screen_buffer);
+	return fb_sys_read(info, buf, count, ppos);
 }
 EXPORT_SYMBOL(drm_fb_helper_sys_read);
 
-static ssize_t drm_fb_helper_write_screen_buffer(struct fb_info *info, const char __user *buf,
-						 size_t count, loff_t pos)
-{
-	char *dst = info->screen_buffer + pos;
-
-	if (copy_from_user(dst, buf, count))
-		return -EFAULT;
-
-	return count;
-}
-
 /**
  * drm_fb_helper_sys_write - Implements struct &fb_ops.fb_write for system memory
  * @info: fb_info struct pointer
@@ -849,7 +749,7 @@ ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
 	ssize_t ret;
 	struct drm_rect damage_area;
 
-	ret = __drm_fb_helper_write(info, buf, count, ppos, drm_fb_helper_write_screen_buffer);
+	ret = fb_sys_write(info, buf, count, ppos);
 	if (ret <= 0)
 		return ret;
 
@@ -921,39 +821,6 @@ void drm_fb_helper_sys_imageblit(struct fb_info *info,
 }
 EXPORT_SYMBOL(drm_fb_helper_sys_imageblit);
 
-static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count,
-				   loff_t pos)
-{
-	const char __iomem *src = info->screen_base + pos;
-	size_t alloc_size = min_t(size_t, count, PAGE_SIZE);
-	ssize_t ret = 0;
-	int err = 0;
-	char *tmp;
-
-	tmp = kmalloc(alloc_size, GFP_KERNEL);
-	if (!tmp)
-		return -ENOMEM;
-
-	while (count) {
-		size_t c = min_t(size_t, count, alloc_size);
-
-		memcpy_fromio(tmp, src, c);
-		if (copy_to_user(buf, tmp, c)) {
-			err = -EFAULT;
-			break;
-		}
-
-		src += c;
-		buf += c;
-		ret += c;
-		count -= c;
-	}
-
-	kfree(tmp);
-
-	return ret ? ret : err;
-}
-
 /**
  * drm_fb_helper_cfb_read - Implements struct &fb_ops.fb_read for I/O memory
  * @info: fb_info struct pointer
@@ -967,43 +834,10 @@ static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_
 ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
 			       size_t count, loff_t *ppos)
 {
-	return __drm_fb_helper_read(info, buf, count, ppos, fb_read_screen_base);
+	return fb_io_read(info, buf, count, ppos);
 }
 EXPORT_SYMBOL(drm_fb_helper_cfb_read);
 
-static ssize_t fb_write_screen_base(struct fb_info *info, const char __user *buf, size_t count,
-				    loff_t pos)
-{
-	char __iomem *dst = info->screen_base + pos;
-	size_t alloc_size = min_t(size_t, count, PAGE_SIZE);
-	ssize_t ret = 0;
-	int err = 0;
-	u8 *tmp;
-
-	tmp = kmalloc(alloc_size, GFP_KERNEL);
-	if (!tmp)
-		return -ENOMEM;
-
-	while (count) {
-		size_t c = min_t(size_t, count, alloc_size);
-
-		if (copy_from_user(tmp, buf, c)) {
-			err = -EFAULT;
-			break;
-		}
-		memcpy_toio(dst, tmp, c);
-
-		dst += c;
-		buf += c;
-		ret += c;
-		count -= c;
-	}
-
-	kfree(tmp);
-
-	return ret ? ret : err;
-}
-
 /**
  * drm_fb_helper_cfb_write - Implements struct &fb_ops.fb_write for I/O memory
  * @info: fb_info struct pointer
@@ -1022,7 +856,7 @@ ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
 	ssize_t ret;
 	struct drm_rect damage_area;
 
-	ret = __drm_fb_helper_write(info, buf, count, ppos, fb_write_screen_base);
+	ret = fb_io_write(info, buf, count, ppos);
 	if (ret <= 0)
 		return ret;