| Message ID | 20231115102954.7102-21-tzimmermann@suse.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | fbdev: Modularize helpers for struct fb_ops | expand |
Thomas Zimmermann <tzimmermann@suse.de> writes: > Initialize the instance of struct fb_ops with fbdev initializer > macros for framebuffers in I/O address space. This explictily sets > the read/write, draw and mmap callbacks to the correct default > implementation. > > Fbdev drivers sometimes rely on the callbacks being NULL for a > default implementation to be invoked; hence requireing the I/O > helpers to be built in any case. Setting all callbacks in all > drivers explicitly will allow to make the I/O helpers optional. > This benefits systems that do not use these functions. > > Set the callbacks via macros. No functional changes. > > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > Cc: Andy Walls <awalls@md.metrocast.net> > Cc: Mauro Carvalho Chehab <mchehab@kernel.org> > Cc: linux-media@vger.kernel.org > --- Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Hi Thomas, On 15/11/2023 11:19, Thomas Zimmermann wrote: > Initialize the instance of struct fb_ops with fbdev initializer > macros for framebuffers in I/O address space. This explictily sets > the read/write, draw and mmap callbacks to the correct default > implementation. > > Fbdev drivers sometimes rely on the callbacks being NULL for a > default implementation to be invoked; hence requireing the I/O > helpers to be built in any case. Setting all callbacks in all > drivers explicitly will allow to make the I/O helpers optional. > This benefits systems that do not use these functions. > > Set the callbacks via macros. No functional changes. Makes sense, shall I pick up this patch? If you prefer to take it, then you can add: Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Regards, Hans > > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > Cc: Andy Walls <awalls@md.metrocast.net> > Cc: Mauro Carvalho Chehab <mchehab@kernel.org> > Cc: linux-media@vger.kernel.org > --- > drivers/media/pci/ivtv/Kconfig | 4 +--- > drivers/media/pci/ivtv/ivtvfb.c | 6 +++--- > 2 files changed, 4 insertions(+), 6 deletions(-) > > diff --git a/drivers/media/pci/ivtv/Kconfig b/drivers/media/pci/ivtv/Kconfig > index 9be52101bc4f2..2498f9079b756 100644 > --- a/drivers/media/pci/ivtv/Kconfig > +++ b/drivers/media/pci/ivtv/Kconfig > @@ -48,9 +48,7 @@ config VIDEO_IVTV_ALSA > config VIDEO_FB_IVTV > tristate "Conexant cx23415 framebuffer support" > depends on VIDEO_IVTV && FB > - select FB_CFB_FILLRECT > - select FB_CFB_COPYAREA > - select FB_CFB_IMAGEBLIT > + select FB_IOMEM_HELPERS > help > This is a framebuffer driver for the Conexant cx23415 MPEG > encoder/decoder. > diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c > index 23c8c094e791b..410477e3e6216 100644 > --- a/drivers/media/pci/ivtv/ivtvfb.c > +++ b/drivers/media/pci/ivtv/ivtvfb.c > @@ -927,17 +927,17 @@ static int ivtvfb_blank(int blank_mode, struct fb_info *info) > > static const struct fb_ops ivtvfb_ops = { > .owner = THIS_MODULE, > + .fb_read = fb_io_read, > .fb_write = ivtvfb_write, > .fb_check_var = ivtvfb_check_var, > .fb_set_par = ivtvfb_set_par, > .fb_setcolreg = ivtvfb_setcolreg, > - .fb_fillrect = cfb_fillrect, > - .fb_copyarea = cfb_copyarea, > - .fb_imageblit = cfb_imageblit, > + __FB_DEFAULT_IOMEM_OPS_DRAW, > .fb_cursor = NULL, > .fb_ioctl = ivtvfb_ioctl, > .fb_pan_display = ivtvfb_pan_display, > .fb_blank = ivtvfb_blank, > + __FB_DEFAULT_IOMEM_OPS_MMAP, > }; > > /* Restore hardware after firmware restart */
Hi Am 20.11.23 um 09:52 schrieb Hans Verkuil: > Hi Thomas, > > On 15/11/2023 11:19, Thomas Zimmermann wrote: >> Initialize the instance of struct fb_ops with fbdev initializer >> macros for framebuffers in I/O address space. This explictily sets >> the read/write, draw and mmap callbacks to the correct default >> implementation. >> >> Fbdev drivers sometimes rely on the callbacks being NULL for a >> default implementation to be invoked; hence requireing the I/O >> helpers to be built in any case. Setting all callbacks in all >> drivers explicitly will allow to make the I/O helpers optional. >> This benefits systems that do not use these functions. >> >> Set the callbacks via macros. No functional changes. > > Makes sense, shall I pick up this patch? > > If you prefer to take it, then you can add: > > Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Thanks. The series' final patches depend on this one. I'd preferably merge it at once through drm-misc. Best regards Thomas > > Regards, > > Hans > >> >> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> >> Cc: Andy Walls <awalls@md.metrocast.net> >> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> >> Cc: linux-media@vger.kernel.org >> --- >> drivers/media/pci/ivtv/Kconfig | 4 +--- >> drivers/media/pci/ivtv/ivtvfb.c | 6 +++--- >> 2 files changed, 4 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/media/pci/ivtv/Kconfig b/drivers/media/pci/ivtv/Kconfig >> index 9be52101bc4f2..2498f9079b756 100644 >> --- a/drivers/media/pci/ivtv/Kconfig >> +++ b/drivers/media/pci/ivtv/Kconfig >> @@ -48,9 +48,7 @@ config VIDEO_IVTV_ALSA >> config VIDEO_FB_IVTV >> tristate "Conexant cx23415 framebuffer support" >> depends on VIDEO_IVTV && FB >> - select FB_CFB_FILLRECT >> - select FB_CFB_COPYAREA >> - select FB_CFB_IMAGEBLIT >> + select FB_IOMEM_HELPERS >> help >> This is a framebuffer driver for the Conexant cx23415 MPEG >> encoder/decoder. >> diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c >> index 23c8c094e791b..410477e3e6216 100644 >> --- a/drivers/media/pci/ivtv/ivtvfb.c >> +++ b/drivers/media/pci/ivtv/ivtvfb.c >> @@ -927,17 +927,17 @@ static int ivtvfb_blank(int blank_mode, struct fb_info *info) >> >> static const struct fb_ops ivtvfb_ops = { >> .owner = THIS_MODULE, >> + .fb_read = fb_io_read, >> .fb_write = ivtvfb_write, >> .fb_check_var = ivtvfb_check_var, >> .fb_set_par = ivtvfb_set_par, >> .fb_setcolreg = ivtvfb_setcolreg, >> - .fb_fillrect = cfb_fillrect, >> - .fb_copyarea = cfb_copyarea, >> - .fb_imageblit = cfb_imageblit, >> + __FB_DEFAULT_IOMEM_OPS_DRAW, >> .fb_cursor = NULL, >> .fb_ioctl = ivtvfb_ioctl, >> .fb_pan_display = ivtvfb_pan_display, >> .fb_blank = ivtvfb_blank, >> + __FB_DEFAULT_IOMEM_OPS_MMAP, >> }; >> >> /* Restore hardware after firmware restart */ >
diff --git a/drivers/media/pci/ivtv/Kconfig b/drivers/media/pci/ivtv/Kconfig index 9be52101bc4f2..2498f9079b756 100644 --- a/drivers/media/pci/ivtv/Kconfig +++ b/drivers/media/pci/ivtv/Kconfig @@ -48,9 +48,7 @@ config VIDEO_IVTV_ALSA config VIDEO_FB_IVTV tristate "Conexant cx23415 framebuffer support" depends on VIDEO_IVTV && FB - select FB_CFB_FILLRECT - select FB_CFB_COPYAREA - select FB_CFB_IMAGEBLIT + select FB_IOMEM_HELPERS help This is a framebuffer driver for the Conexant cx23415 MPEG encoder/decoder. diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c index 23c8c094e791b..410477e3e6216 100644 --- a/drivers/media/pci/ivtv/ivtvfb.c +++ b/drivers/media/pci/ivtv/ivtvfb.c @@ -927,17 +927,17 @@ static int ivtvfb_blank(int blank_mode, struct fb_info *info) static const struct fb_ops ivtvfb_ops = { .owner = THIS_MODULE, + .fb_read = fb_io_read, .fb_write = ivtvfb_write, .fb_check_var = ivtvfb_check_var, .fb_set_par = ivtvfb_set_par, .fb_setcolreg = ivtvfb_setcolreg, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, + __FB_DEFAULT_IOMEM_OPS_DRAW, .fb_cursor = NULL, .fb_ioctl = ivtvfb_ioctl, .fb_pan_display = ivtvfb_pan_display, .fb_blank = ivtvfb_blank, + __FB_DEFAULT_IOMEM_OPS_MMAP, }; /* Restore hardware after firmware restart */
Initialize the instance of struct fb_ops with fbdev initializer macros for framebuffers in I/O address space. This explictily sets the read/write, draw and mmap callbacks to the correct default implementation. Fbdev drivers sometimes rely on the callbacks being NULL for a default implementation to be invoked; hence requireing the I/O helpers to be built in any case. Setting all callbacks in all drivers explicitly will allow to make the I/O helpers optional. This benefits systems that do not use these functions. Set the callbacks via macros. No functional changes. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Andy Walls <awalls@md.metrocast.net> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-media@vger.kernel.org --- drivers/media/pci/ivtv/Kconfig | 4 +--- drivers/media/pci/ivtv/ivtvfb.c | 6 +++--- 2 files changed, 4 insertions(+), 6 deletions(-)