Merge tag 'drm-misc-next-2023-06-01' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v6.5:

UAPI Changes:

Cross-subsystem Changes:

 * fbdev:
   * Add Kconfig options and initializer macros for file I/O, convert
     DRM fbdev emulation

Core Changes:

 * Unify handling of struct file_operations.show_fdinfo

 * Use .probe in all i2c code (interface cleanup)

 * TTM:
   * Remove unused code

Driver Changes:

 * amdgpu:
   * Use shared show_fdinfo code
   * Fix building without procfs

 * bridge:
   * display-conenctor: Add support for external power supply
   * samsung-dsim: Fix enabling; Support variable clocking
   * tc358767: Fixes
   * ti-sn65dsi83: Fix enabling

 * msm:
   * Use shared show_fdinfo code

 * msxfb:
   * Add support for i.MX93 LCDIF

 * panel:
   * Add support for Ampire AM-800480L1TMQW-T00H plus DT bindings
   * panel-edp: Convert .remove to return void

 * stm:
   * dsi: Use devm_ helper
   * ltdc: Fix potential invalid pointer deref

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

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230601112246.GA10882@linux-uq9g

1 files changed, 112 insertions, 0 deletions

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 2cf8efcb9e32..ce6823e157e6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -539,8 +539,30 @@ extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf,
 			   size_t count, loff_t *ppos);
 
 /*
+ * Initializes struct fb_ops for framebuffers in I/O memory.
+ */
+
+#define __FB_DEFAULT_IO_OPS_RDWR \
+	.fb_read	= fb_io_read, \
+	.fb_write	= fb_io_write
+
+#define __FB_DEFAULT_IO_OPS_DRAW \
+	.fb_fillrect	= cfb_fillrect, \
+	.fb_copyarea	= cfb_copyarea, \
+	.fb_imageblit	= cfb_imageblit
+
+#define __FB_DEFAULT_IO_OPS_MMAP \
+	.fb_mmap	= NULL // default implementation
+
+#define FB_DEFAULT_IO_OPS \
+	__FB_DEFAULT_IO_OPS_RDWR, \
+	__FB_DEFAULT_IO_OPS_DRAW, \
+	__FB_DEFAULT_IO_OPS_MMAP
+
+/*
  * Drawing operations where framebuffer is in system RAM
  */
+
 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
@@ -549,6 +571,27 @@ extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 			    size_t count, loff_t *ppos);
 
+/*
+ * Initializes struct fb_ops for framebuffers in system memory.
+ */
+
+#define __FB_DEFAULT_SYS_OPS_RDWR \
+	.fb_read	= fb_sys_read, \
+	.fb_write	= fb_sys_write
+
+#define __FB_DEFAULT_SYS_OPS_DRAW \
+	.fb_fillrect	= sys_fillrect, \
+	.fb_copyarea	= sys_copyarea, \
+	.fb_imageblit	= sys_imageblit
+
+#define __FB_DEFAULT_SYS_OPS_MMAP \
+	.fb_mmap	= NULL // default implementation
+
+#define FB_DEFAULT_SYS_OPS \
+	__FB_DEFAULT_SYS_OPS_RDWR, \
+	__FB_DEFAULT_SYS_OPS_DRAW, \
+	__FB_DEFAULT_SYS_OPS_MMAP
+
 /* drivers/video/fbmem.c */
 extern int register_framebuffer(struct fb_info *fb_info);
 extern void unregister_framebuffer(struct fb_info *fb_info);
@@ -604,6 +647,75 @@ extern void fb_deferred_io_cleanup(struct fb_info *info);
 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
 				loff_t end, int datasync);
 
+/*
+ * Generate callbacks for deferred I/O
+ */
+
+#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \
+	static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \
+					       size_t count, loff_t *ppos) \
+	{ \
+		return fb_ ## __mode ## _read(info, buf, count, ppos); \
+	} \
+	static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \
+						size_t count, loff_t *ppos) \
+	{ \
+		unsigned long offset = *ppos; \
+		ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \
+		if (ret > 0) \
+			__damage_range(info, offset, ret); \
+		return ret; \
+	}
+
+#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \
+	static void __prefix ## _defio_fillrect(struct fb_info *info, \
+						const struct fb_fillrect *rect) \
+	{ \
+		__mode ## _fillrect(info, rect); \
+		__damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \
+	} \
+	static void __prefix ## _defio_copyarea(struct fb_info *info, \
+						const struct fb_copyarea *area) \
+	{ \
+		__mode ## _copyarea(info, area); \
+		__damage_area(info, area->dx, area->dy, area->width, area->height); \
+	} \
+	static void __prefix ## _defio_imageblit(struct fb_info *info, \
+						 const struct fb_image *image) \
+	{ \
+		__mode ## _imageblit(info, image); \
+		__damage_area(info, image->dx, image->dy, image->width, image->height); \
+	}
+
+#define FB_GEN_DEFAULT_DEFERRED_IO_OPS(__prefix, __damage_range, __damage_area) \
+	__FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \
+	__FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb)
+
+#define FB_GEN_DEFAULT_DEFERRED_SYS_OPS(__prefix, __damage_range, __damage_area) \
+	__FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
+	__FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
+
+/*
+ * Initializes struct fb_ops for deferred I/O.
+ */
+
+#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \
+	.fb_read	= __prefix ## _defio_read, \
+	.fb_write	= __prefix ## _defio_write
+
+#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \
+	.fb_fillrect	= __prefix ## _defio_fillrect, \
+	.fb_copyarea	= __prefix ## _defio_copyarea, \
+	.fb_imageblit	= __prefix ## _defio_imageblit
+
+#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \
+	.fb_mmap	= fb_deferred_io_mmap
+
+#define FB_DEFAULT_DEFERRED_OPS(__prefix) \
+	__FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \
+	__FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \
+	__FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix)
+
 static inline bool fb_be_math(struct fb_info *info)
 {
 #ifdef CONFIG_FB_FOREIGN_ENDIAN