On Mon, Jul 13, 2015 at 12:07:59PM +0530, Archit Taneja wrote:
Some drm drivers populate their fb_ops with fb_sys_read/write fb sysfs ops.
Create a drm_fb_helper function that wraps around these calls.
This is part of an effort to prevent drm drivers from calling fbdev functions directly, in order to make fbdev emulation a top level drm option.
Signed-off-by: Archit Taneja architt@codeaurora.org
drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/drm_fb_helper.c | 20 ++++++++++++++++++++ include/drm/drm_fb_helper.h | 5 +++++ 3 files changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index a66ac44..b284cdc 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -37,6 +37,7 @@ config DRM_KMS_FB_HELPER select FB select FRAMEBUFFER_CONSOLE if !EXPERT select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
- select FB_SYS_FOPS help FBDEV helpers for KMS drivers.
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 742377d..795547e 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -744,6 +744,26 @@ void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) } EXPORT_SYMBOL(drm_fb_helper_unlink_fbi);
+ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
size_t count, loff_t *ppos)
Another one: Checkpatch complains about alignment here. I agree. -Danel
+{
- if (info)
return fb_sys_read(info, buf, count, ppos);- return -ENODEV;
+} +EXPORT_SYMBOL(drm_fb_helper_sys_read);
+ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos)+{
- if (info)
return fb_sys_write(info, buf, count, ppos);- return -ENODEV;
+} +EXPORT_SYMBOL(drm_fb_helper_sys_write);
static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, u16 blue, u16 regno, struct fb_info *info) { diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 4c90837..f74e59e 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -147,6 +147,11 @@ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
+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);int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation