Hi Am 01.08.23 um 13:22 schrieb Hans Verkuil:
On 01/08/2023 12:13, Thomas Zimmermann wrote:Set struct fb_ops and with FB_DEFAULT_IO_OPS, fbdev's initializer for I/O memory. Sets the callbacks to the cfb_ and fb_io_ functions. Select the correct modules with Kconfig's FB_IO_HELPERS token. The macro and token set the currently selected values, so there is no functional change. v2: * updated to use _IOMEM_ tokens Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx> Acked-by: Helge Deller <deller@xxxxxx> Cc: Hans Verkuil <hverkuil@xxxxxxxxx> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> --- drivers/media/test-drivers/vivid/Kconfig | 4 +--- drivers/media/test-drivers/vivid/vivid-osd.c | 4 +--- 2 files changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/media/test-drivers/vivid/Kconfig b/drivers/media/test-drivers/vivid/Kconfig index 318799d317ba..5b08a5ad291e 100644 --- a/drivers/media/test-drivers/vivid/Kconfig +++ b/drivers/media/test-drivers/vivid/Kconfig @@ -3,11 +3,9 @@ config VIDEO_VIVID tristate "Virtual Video Test Driver" depends on VIDEO_DEV && !SPARC32 && !SPARC64 && FB depends on HAS_DMA + select FB_IOMEM_HELPERS select FONT_SUPPORT select FONT_8x16 - select FB_CFB_FILLRECT - select FB_CFB_COPYAREA - select FB_CFB_IMAGEBLIT select VIDEOBUF2_VMALLOC select VIDEOBUF2_DMA_CONTIG select VIDEO_V4L2_TPG diff --git a/drivers/media/test-drivers/vivid/vivid-osd.c b/drivers/media/test-drivers/vivid/vivid-osd.c index 051f1805a16d..5c931b94a7b5 100644 --- a/drivers/media/test-drivers/vivid/vivid-osd.c +++ b/drivers/media/test-drivers/vivid/vivid-osd.c @@ -246,12 +246,10 @@ static int vivid_fb_blank(int blank_mode, struct fb_info *info)static const struct fb_ops vivid_fb_ops = {.owner = THIS_MODULE, + FB_DEFAULT_IOMEM_OPS,This macro also sets fb_read and fb_write ops here, in addition to the cfb_* ops, based on this patch: https://lore.kernel.org/all/20230729193157.15446-2-tzimmermann@xxxxxxx/#Z2e.:20230729193157.15446-2-tzimmermann::40suse.de:1include:linux:fb.h But those two ops were never set in this driver before. It's been ages since I last worked with this, so I can't tell whether that's good or bad, all I know is that it makes what appears to be a functional change. Can you explain a bit more? Am I missing something?
That change is intentional and welcome. If no fb_read/fb_write pointers are given fbdev uses them as their default. See
https://elixir.bootlin.com/linux/v6.5-rc1/source/drivers/video/fbdev/core/fbmem.c#L773and below. Once all drivers set these pointers explicitly, we can drop the default and make the helpers optional and modular. For the drivers in this patchset there's no functional change.
Best regards Thomas
Regards, Hans.fb_check_var = vivid_fb_check_var, .fb_set_par = vivid_fb_set_par, .fb_setcolreg = vivid_fb_setcolreg, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, .fb_cursor = NULL, .fb_ioctl = vivid_fb_ioctl, .fb_pan_display = vivid_fb_pan_display,
-- 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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