Implement dedicated fbdev helpers for framebuffer I/O instead
of using DRM's helpers. Fbdev-generic was the only caller of the
DRM helpers, so remove them from the helper module.
Add CONFIG_DRM_FBDEV_GENERIC_EMULATION to select the necessary
Kconfig options automatically. Make fbdev emulation depend on
the new config option.
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
drivers/gpu/drm/Kconfig | 15 ++--
drivers/gpu/drm/Makefile | 5 +-
drivers/gpu/drm/drm_fb_helper.c | 107 ----------------------------
drivers/gpu/drm/drm_fbdev_generic.c | 47 ++++++++++--
include/drm/drm_fb_helper.h | 41 -----------
include/drm/drm_fbdev_generic.h | 2 +-
6 files changed, 55 insertions(+), 162 deletions(-)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index c007cb75715e..c67c97471b3c 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -95,9 +95,19 @@ config DRM_KUNIT_TEST
config DRM_KMS_HELPER
tristate
depends on DRM
+ select DRM_FBDEV_GENERIC_EMULATION if DRM_FBDEV_EMULATION
help
CRTC helpers for KMS drivers.
+config DRM_FBDEV_GENERIC_EMULATION
+ bool
+ depends on DRM_KMS_HELPER
+ select FB_DEFERRED_IO
+ select FB_SYS_COPYAREA
+ select FB_SYS_FILLRECT
+ select FB_SYS_FOPS
+ select FB_SYS_IMAGEBLIT
+
config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
bool "Enable refcount backtrace history in the DP MST helpers"
depends on STACKTRACE_SUPPORT
@@ -135,11 +145,6 @@ config DRM_FBDEV_EMULATION
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
- select FB_DEFERRED_IO
- select FB_SYS_FOPS
- select FB_SYS_FILLRECT
- select FB_SYS_COPYAREA
- select FB_SYS_IMAGEBLIT
select FRAMEBUFFER_CONSOLE if !EXPERT
select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
default y
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index d94821d37c2d..f737f0e476b5 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -121,9 +121,8 @@ drm_kms_helper-y := \
drm_self_refresh_helper.o \
drm_simple_kms_helper.o
drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
-drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += \
- drm_fbdev_generic.o \
- drm_fb_helper.o
+drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
+drm_kms_helper-$(CONFIG_DRM_FBDEV_GENERIC_EMULATION) += drm_fbdev_generic.o
obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
#
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 8724e08c518b..ba0a808f14ee 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -729,113 +729,6 @@ void drm_fb_helper_deferred_io(struct fb_info *info,
struct list_head *pagerefli
}
EXPORT_SYMBOL(drm_fb_helper_deferred_io);
-/**
- * drm_fb_helper_sys_read - Implements struct &fb_ops.fb_read for system memory
- * @info: fb_info struct pointer
- * @buf: userspace buffer to read from framebuffer memory
- * @count: number of bytes to read from framebuffer memory
- * @ppos: read offset within framebuffer memory
- *
- * Returns:
- * The number of bytes read on success, or an error code otherwise.
- */
-ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
- size_t count, loff_t *ppos)
-{
- return fb_sys_read(info, buf, count, ppos);
-}
-EXPORT_SYMBOL(drm_fb_helper_sys_read);
-
-/**
- * drm_fb_helper_sys_write - Implements struct &fb_ops.fb_write for system
memory
- * @info: fb_info struct pointer
- * @buf: userspace buffer to write to framebuffer memory
- * @count: number of bytes to write to framebuffer memory
- * @ppos: write offset within framebuffer memory
- *
- * Returns:
- * The number of bytes written on success, or an error code otherwise.
- */
-ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct drm_fb_helper *helper = info->par;
- loff_t pos = *ppos;
- ssize_t ret;
- struct drm_rect damage_area;
-
- ret = fb_sys_write(info, buf, count, ppos);
- if (ret <= 0)
- return ret;
-
- if (helper->funcs->fb_dirty) {
- drm_fb_helper_memory_range_to_clip(info, pos, ret,
&damage_area);
- drm_fb_helper_damage(helper, damage_area.x1, damage_area.y1,
- drm_rect_width(&damage_area),
- drm_rect_height(&damage_area));
- }
-
- return ret;
-}
-EXPORT_SYMBOL(drm_fb_helper_sys_write);
-
-/**
- * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect
- * @info: fbdev registered by the helper
- * @rect: info about rectangle to fill
- *
- * A wrapper around sys_fillrect implemented by fbdev core
- */
-void drm_fb_helper_sys_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
- struct drm_fb_helper *helper = info->par;
-
- sys_fillrect(info, rect);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, rect->dx, rect->dy, rect->width,
rect->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_sys_fillrect);
-
-/**
- * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea
- * @info: fbdev registered by the helper
- * @area: info about area to copy
- *
- * A wrapper around sys_copyarea implemented by fbdev core
- */
-void drm_fb_helper_sys_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
- struct drm_fb_helper *helper = info->par;
-
- sys_copyarea(info, area);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, area->dx, area->dy, area->width,
area->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_sys_copyarea);
-
-/**
- * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit
- * @info: fbdev registered by the helper
- * @image: info about image to blit
- *
- * A wrapper around sys_imageblit implemented by fbdev core
- */
-void drm_fb_helper_sys_imageblit(struct fb_info *info,
- const struct fb_image *image)
-{
- struct drm_fb_helper *helper = info->par;
-
- sys_imageblit(info, image);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, image->dx, image->dy,
image->width, image->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_sys_imageblit);
-
/**
* drm_fb_helper_cfb_read - Implements struct &fb_ops.fb_read for I/O memory
* @info: fb_info struct pointer
diff --git a/drivers/gpu/drm/drm_fbdev_generic.c
b/drivers/gpu/drm/drm_fbdev_generic.c
index 8e5148bf40bb..f53fc49e34a4 100644
--- a/drivers/gpu/drm/drm_fbdev_generic.c
+++ b/drivers/gpu/drm/drm_fbdev_generic.c
@@ -34,6 +34,43 @@ static int drm_fbdev_generic_fb_release(struct fb_info
*info, int user)
return 0;
}
+static ssize_t drm_fbdev_generic_fb_write(struct fb_info *info, const char
__user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct drm_fb_helper *helper = info->par;
+ loff_t pos = *ppos;
+ ssize_t ret;
+
+ ret = fb_sys_write(info, buf, count, ppos);
+ if (ret > 0)
+ drm_fb_helper_damage_range(helper, pos, ret);
+ return ret;
+}
+
+static void drm_fbdev_generic_fb_fillrect(struct fb_info *info, const struct
fb_fillrect *rect)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ sys_fillrect(info, rect);
+ drm_fb_helper_damage(helper, rect->dx, rect->dy, rect->width,
rect->height);
+}
+
+static void drm_fbdev_generic_fb_copyarea(struct fb_info *info, const struct
fb_copyarea *area)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ sys_copyarea(info, area);
+ drm_fb_helper_damage(helper, area->dx, area->dy, area->width,
area->height);
+}
+
+static void drm_fbdev_generic_fb_imageblit(struct fb_info *info, const struct
fb_image *image)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ sys_imageblit(info, image);
+ drm_fb_helper_damage(helper, image->dx, image->dy, image->width,
image->height);
+}
+
static void drm_fbdev_generic_fb_destroy(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
@@ -56,12 +93,12 @@ static const struct fb_ops drm_fbdev_generic_fb_ops = {
.owner = THIS_MODULE,
.fb_open = drm_fbdev_generic_fb_open,
.fb_release = drm_fbdev_generic_fb_release,
- .fb_read = drm_fb_helper_sys_read,
- .fb_write = drm_fb_helper_sys_write,
+ .fb_read = fb_sys_read,
+ .fb_write = drm_fbdev_generic_fb_write,
DRM_FB_HELPER_DEFAULT_OPS,
- .fb_fillrect = drm_fb_helper_sys_fillrect,
- .fb_copyarea = drm_fb_helper_sys_copyarea,
- .fb_imageblit = drm_fb_helper_sys_imageblit,
+ .fb_fillrect = drm_fbdev_generic_fb_fillrect,
+ .fb_copyarea = drm_fbdev_generic_fb_copyarea,
+ .fb_imageblit = drm_fbdev_generic_fb_imageblit,
.fb_mmap = fb_deferred_io_mmap,
.fb_destroy = drm_fbdev_generic_fb_destroy,
};
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 80c402f4e379..e3240d749a43 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -259,18 +259,6 @@ void drm_fb_helper_damage_range(struct drm_fb_helper
*helper, off_t off, size_t
void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head
*pagereflist);
-ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
- size_t count, loff_t *ppos);
-ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
- size_t count, loff_t *ppos);
-
-void drm_fb_helper_sys_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect);
-void drm_fb_helper_sys_copyarea(struct fb_info *info,
- const struct fb_copyarea *area);
-void drm_fb_helper_sys_imageblit(struct fb_info *info,
- const struct fb_image *image);
-
ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
size_t count, loff_t *ppos);
ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
@@ -398,35 +386,6 @@ static inline int drm_fb_helper_defio_init(struct
drm_fb_helper *fb_helper)
return -ENODEV;
}
-static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
- char __user *buf, size_t count,
- loff_t *ppos)
-{
- return -ENODEV;
-}
-
-static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
- const char __user *buf,
- size_t count, loff_t *ppos)
-{
- return -ENODEV;
-}
-
-static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
-}
-
-static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
-}
-
-static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
- const struct fb_image *image)
-{
-}
-
static inline ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user
*buf,
size_t count, loff_t *ppos)
{
diff --git a/include/drm/drm_fbdev_generic.h b/include/drm/drm_fbdev_generic.h
index 75799342098d..2db4faffda20 100644
--- a/include/drm/drm_fbdev_generic.h
+++ b/include/drm/drm_fbdev_generic.h
@@ -5,7 +5,7 @@
struct drm_device;
-#ifdef CONFIG_DRM_FBDEV_EMULATION
+#if defined(CONFIG_DRM_FBDEV_GENERIC_EMULATION)
void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int
preferred_bpp);
#else
static inline void drm_fbdev_generic_setup(struct drm_device *dev, unsigned
int preferred_bpp)
--
2.40.1
