| Message ID | 20230706124905.15134-5-tzimmermann@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Improve fbdev emulation for DMA-able framebuffers | expand |
On Thu, Jul 06, 2023 at 02:46:42PM +0200, Thomas Zimmermann wrote: > Mark the framebuffer with FBINFO_VIRTFB. The framebuffer range is > in DMA-able memory and should be accessed with the CPU's regular > memory ops. > > v2: > * drop FBINFO_DEFAULT > > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> > Acked-by: Maxime Ripard <mripard@kernel.org> > Cc: Thierry Reding <thierry.reding@gmail.com> > Cc: Mikko Perttunen <mperttunen@nvidia.com> > --- > drivers/gpu/drm/tegra/fbdev.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c > index 82577b7c88da..d8460c5dc91e 100644 > --- a/drivers/gpu/drm/tegra/fbdev.c > +++ b/drivers/gpu/drm/tegra/fbdev.c > @@ -132,6 +132,7 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper, > } > } > > + info->flags |= FBINFO_VIRTFB; > info->screen_base = (void __iomem *)bo->vaddr + offset; As part of this, do we also need to set info->screen_buffer instead of info->screen_base? The drm_fbdev_dma_helper functions do that. Thierry > info->screen_size = size; > info->fix.smem_start = (unsigned long)(bo->iova + offset); > -- > 2.41.0 >
Hi Am 06.07.23 um 16:31 schrieb Thierry Reding: > On Thu, Jul 06, 2023 at 02:46:42PM +0200, Thomas Zimmermann wrote: >> Mark the framebuffer with FBINFO_VIRTFB. The framebuffer range is >> in DMA-able memory and should be accessed with the CPU's regular >> memory ops. >> >> v2: >> * drop FBINFO_DEFAULT >> >> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> >> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> >> Acked-by: Maxime Ripard <mripard@kernel.org> >> Cc: Thierry Reding <thierry.reding@gmail.com> >> Cc: Mikko Perttunen <mperttunen@nvidia.com> >> --- >> drivers/gpu/drm/tegra/fbdev.c | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c >> index 82577b7c88da..d8460c5dc91e 100644 >> --- a/drivers/gpu/drm/tegra/fbdev.c >> +++ b/drivers/gpu/drm/tegra/fbdev.c >> @@ -132,6 +132,7 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper, >> } >> } >> >> + info->flags |= FBINFO_VIRTFB; >> info->screen_base = (void __iomem *)bo->vaddr + offset; > > As part of this, do we also need to set info->screen_buffer instead of > info->screen_base? The drm_fbdev_dma_helper functions do that. Indeed, good point. I'll update this in the next iteration. Best regards Thomas > > Thierry > >> info->screen_size = size; >> info->fix.smem_start = (unsigned long)(bo->iova + offset); >> -- >> 2.41.0 >>
diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c index 82577b7c88da..d8460c5dc91e 100644 --- a/drivers/gpu/drm/tegra/fbdev.c +++ b/drivers/gpu/drm/tegra/fbdev.c @@ -132,6 +132,7 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper, } } + info->flags |= FBINFO_VIRTFB; info->screen_base = (void __iomem *)bo->vaddr + offset; info->screen_size = size; info->fix.smem_start = (unsigned long)(bo->iova + offset);