Hi Am 18.05.23 um 14:46 schrieb Sui Jingfeng:
Hi, On 2023/5/17 15:07, Thomas Zimmermann wrote:Hi Am 17.05.23 um 03:58 schrieb Sui Jingfeng:Hi, ThomasAfter apply your patch set, the kernel with arch/loongarch/configs/loongson3_defconfigcan not finish compile anymore. gcc complains: AR drivers/gpu/built-in.a AR drivers/built-in.a AR built-in.a AR vmlinux.a LD vmlinux.o OBJCOPY modules.builtin.modinfo GEN modules.builtin GEN .vmlinux.objs MODPOST Module.symversERROR: modpost: "fb_sys_write" [drivers/gpu/drm/drm_kms_helper.ko] undefined! ERROR: modpost: "sys_imageblit" [drivers/gpu/drm/drm_kms_helper.ko] undefined! ERROR: modpost: "sys_fillrect" [drivers/gpu/drm/drm_kms_helper.ko] undefined! ERROR: modpost: "sys_copyarea" [drivers/gpu/drm/drm_kms_helper.ko] undefined! ERROR: modpost: "fb_sys_read" [drivers/gpu/drm/drm_kms_helper.ko] undefined!make[1]: *** [scripts/Makefile.modpost:136: Module.symvers] Error 1 make: *** [Makefile:1978: modpost] Error 2Thanks for reporting this problem. I found that it's caused by a typo in the very first patch 1/7, where these helpers are not selected correctly. Will be fixed in the next round.Yeah, this is just a typo.Should replace 'FB_SYS_HELPER' with 'FB_SYS_HELPERS' on the first patch of this series.But select FB_SYS_HELPERS here is more better, I think. Because it show the nature thatBest regards ThomasOn 2023/5/15 17:40, Thomas Zimmermann wrote: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. v2: * use FB_SYS_HELPERS_DEFERRED option Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/Kconfig | 6 +-drivers/gpu/drm/drm_fb_helper.c | 107 ----------------------------drivers/gpu/drm/drm_fbdev_generic.c | 47 ++++++++++-- include/drm/drm_fb_helper.h | 41 ----------- 4 files changed, 43 insertions(+), 158 deletions(-) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 77fb10ddd8a2..92a782827b7b 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -95,6 +95,7 @@ config DRM_KUNIT_TEST config DRM_KMS_HELPER tristate depends on DRM + select FB_SYS_HELPERS_DEFERRED if DRM_FBDEV_EMULATIONHere, select FB_SYS_HELPERS helps resolve the above issue mentioned.DRM_KMS_HELPER is depend on FB_SYS_HELPERS, I think you may want isolate those dependency with DRM_FBDEV_EMULATION guard.at least, you should guarantee that drm itself could built and run standalone.
Indeed, it would be better to select this from DRM_FBDEV_EMULATION. Thanks for the remark. I'll update this in the next version.
Best regards Thomas
Fbdev emulation is a client of drm, not reverse. By the way, does Denial happy about this, maybe, he want the fbdev emulation 100% made in drm?help CRTC helpers for KMS drivers. @@ -135,11 +136,6 @@ 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 ydiff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.cindex 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 pointerdiff --git a/drivers/gpu/drm/drm_fbdev_generic.c b/drivers/gpu/drm/drm_fbdev_generic.cindex 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) {
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)
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