From: Roman Stratiienko <[email protected]>
According to Allwinner DE2.0 Specification REV 1.0, vi layer supports the
following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
Signed-off-by: Roman Stratiienko <[email protected]>
---
drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index bd0e6a52d1d8..07c27e6a4b77 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -404,17 +404,21 @@ static const struct drm_plane_funcs sun8i_vi_layer_funcs = {
static const u32 sun8i_vi_layer_formats[] = {
DRM_FORMAT_ABGR1555,
DRM_FORMAT_ABGR4444,
+ DRM_FORMAT_ABGR8888,
DRM_FORMAT_ARGB1555,
DRM_FORMAT_ARGB4444,
+ DRM_FORMAT_ARGB8888,
DRM_FORMAT_BGR565,
DRM_FORMAT_BGR888,
DRM_FORMAT_BGRA5551,
DRM_FORMAT_BGRA4444,
+ DRM_FORMAT_BGRA8888,
DRM_FORMAT_BGRX8888,
DRM_FORMAT_RGB565,
DRM_FORMAT_RGB888,
DRM_FORMAT_RGBA4444,
DRM_FORMAT_RGBA5551,
+ DRM_FORMAT_RGBA8888,
DRM_FORMAT_RGBX8888,
DRM_FORMAT_XBGR8888,
DRM_FORMAT_XRGB8888,
--
2.17.1
Hi!
Dne sreda, 18. september 2019 ob 13:05:41 CEST je
[email protected] napisal(a):
> From: Roman Stratiienko <[email protected]>
>
> According to Allwinner DE2.0 Specification REV 1.0, vi layer supports the
> following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
It's true that DE2 VI layers support those formats, but it wouldn't change
anything because alpha blending is not supported by those planes. These
formats were deliberately left out because their counterparts without alpha
exist, for example ABGR8888 <-> XBGR8888. It would also confuse user, which
would expect that alpha blending works if format with alpha channel is
selected.
Admittedly some formats with alpha are still reported as supported due to lack
of their counterparts without alpha, but I'm fine with removing them for
consistency.
Best regards,
Jernej
>
> Signed-off-by: Roman Stratiienko <[email protected]>
> ---
> drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c index bd0e6a52d1d8..07c27e6a4b77
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> @@ -404,17 +404,21 @@ static const struct drm_plane_funcs
> sun8i_vi_layer_funcs = { static const u32 sun8i_vi_layer_formats[] = {
> DRM_FORMAT_ABGR1555,
> DRM_FORMAT_ABGR4444,
> + DRM_FORMAT_ABGR8888,
> DRM_FORMAT_ARGB1555,
> DRM_FORMAT_ARGB4444,
> + DRM_FORMAT_ARGB8888,
> DRM_FORMAT_BGR565,
> DRM_FORMAT_BGR888,
> DRM_FORMAT_BGRA5551,
> DRM_FORMAT_BGRA4444,
> + DRM_FORMAT_BGRA8888,
> DRM_FORMAT_BGRX8888,
> DRM_FORMAT_RGB565,
> DRM_FORMAT_RGB888,
> DRM_FORMAT_RGBA4444,
> DRM_FORMAT_RGBA5551,
> + DRM_FORMAT_RGBA8888,
> DRM_FORMAT_RGBX8888,
> DRM_FORMAT_XBGR8888,
> DRM_FORMAT_XRGB8888,
On Thu, Sep 19, 2019 at 08:53:10PM +0200, Jernej Škrabec wrote:
> Dne sreda, 18. september 2019 ob 13:05:41 CEST je
> [email protected] napisal(a):
> > From: Roman Stratiienko <[email protected]>
> >
> > According to Allwinner DE2.0 Specification REV 1.0, vi layer supports the
> > following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
>
> It's true that DE2 VI layers support those formats, but it wouldn't change
> anything because alpha blending is not supported by those planes. These
> formats were deliberately left out because their counterparts without alpha
> exist, for example ABGR8888 <-> XBGR8888. It would also confuse user, which
> would expect that alpha blending works if format with alpha channel is
> selected.
I'm not too familiar with the DE2 code, but why is alpha not working
if the VI planes support formats with alpha?
Thanks!
Maxime
On Fri, Sep 20, 2019 at 9:20 AM Maxime Ripard <[email protected]> wrote:
>
> On Thu, Sep 19, 2019 at 08:53:10PM +0200, Jernej Škrabec wrote:
> > Dne sreda, 18. september 2019 ob 13:05:41 CEST je
> > [email protected] napisal(a):
> > > From: Roman Stratiienko <[email protected]>
> > >
> > > According to Allwinner DE2.0 Specification REV 1.0, vi layer supports the
> > > following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
> >
> > It's true that DE2 VI layers support those formats, but it wouldn't change
> > anything because alpha blending is not supported by those planes. These
> > formats were deliberately left out because their counterparts without alpha
> > exist, for example ABGR8888 <-> XBGR8888. It would also confuse user, which
> > would expect that alpha blending works if format with alpha channel is
> > selected.
>
> I'm not too familiar with the DE2 code, but why is alpha not working
> if the VI planes support formats with alpha?
Good question. It mentioned in the datasheet
https://linux-sunxi.org/images/7/7b/Allwinner_DE2.0_Spec_V1.0.pdf
on page 95: "All ui layers' alpha is useless"
And my experiments proves it.
My assumption that vi uses post-processing that cuts out alpha values.
>
> Thanks!
> Maxime
--
Best regards,
Roman Stratiienko
Global Logic Inc.
On Thu, Sep 19, 2019 at 9:53 PM Jernej Škrabec <[email protected]> wrote:
>
> Hi!
>
> Dne sreda, 18. september 2019 ob 13:05:41 CEST je
> [email protected] napisal(a):
> > From: Roman Stratiienko <[email protected]>
> >
> > According to Allwinner DE2.0 Specification REV 1.0, vi layer supports the
> > following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
>
> It's true that DE2 VI layers support those formats, but it wouldn't change
> anything because alpha blending is not supported by those planes. These
> formats were deliberately left out because their counterparts without alpha
> exist, for example ABGR8888 <-> XBGR8888. It would also confuse user, which
> would expect that alpha blending works if format with alpha channel is
> selected.
>
> Admittedly some formats with alpha are still reported as supported due to lack
> of their counterparts without alpha, but I'm fine with removing them for
> consistency.
Why not to replace 'A' with 'X' on all relevant formats and map them
to corresponding index marked with 'A' (that behaves as true 'X' for
vi)
>
> Best regards,
> Jernej
>
> >
> > Signed-off-by: Roman Stratiienko <[email protected]>
> > ---
> > drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c index bd0e6a52d1d8..07c27e6a4b77
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > @@ -404,17 +404,21 @@ static const struct drm_plane_funcs
> > sun8i_vi_layer_funcs = { static const u32 sun8i_vi_layer_formats[] = {
> > DRM_FORMAT_ABGR1555,
> > DRM_FORMAT_ABGR4444,
> > + DRM_FORMAT_ABGR8888,
> > DRM_FORMAT_ARGB1555,
> > DRM_FORMAT_ARGB4444,
> > + DRM_FORMAT_ARGB8888,
> > DRM_FORMAT_BGR565,
> > DRM_FORMAT_BGR888,
> > DRM_FORMAT_BGRA5551,
> > DRM_FORMAT_BGRA4444,
> > + DRM_FORMAT_BGRA8888,
> > DRM_FORMAT_BGRX8888,
> > DRM_FORMAT_RGB565,
> > DRM_FORMAT_RGB888,
> > DRM_FORMAT_RGBA4444,
> > DRM_FORMAT_RGBA5551,
> > + DRM_FORMAT_RGBA8888,
> > DRM_FORMAT_RGBX8888,
> > DRM_FORMAT_XBGR8888,
> > DRM_FORMAT_XRGB8888,
>
>
>
>
--
Best regards,
Roman Stratiienko
Global Logic Inc.
Dne petek, 20. september 2019 ob 22:22:44 CEST je Roman Stratiienko
napisal(a):
> On Thu, Sep 19, 2019 at 9:53 PM Jernej Škrabec <[email protected]>
wrote:
> > Hi!
> >
> > Dne sreda, 18. september 2019 ob 13:05:41 CEST je
> >
> > [email protected] napisal(a):
> > > From: Roman Stratiienko <[email protected]>
> > >
> > > According to Allwinner DE2.0 Specification REV 1.0, vi layer supports
> > > the
> > > following pixel formats: ABGR_8888, ARGB_8888, BGRA_8888, RGBA_8888
> >
> > It's true that DE2 VI layers support those formats, but it wouldn't change
> > anything because alpha blending is not supported by those planes. These
> > formats were deliberately left out because their counterparts without
> > alpha
> > exist, for example ABGR8888 <-> XBGR8888. It would also confuse user,
> > which
> > would expect that alpha blending works if format with alpha channel is
> > selected.
> >
> > Admittedly some formats with alpha are still reported as supported due to
> > lack of their counterparts without alpha, but I'm fine with removing them
> > for consistency.
I checked again and appropriate formats (with "X" instead of "A") already
exist.
>
> Why not to replace 'A' with 'X' on all relevant formats and map them
> to corresponding index marked with 'A' (that behaves as true 'X' for
> vi)
Yes, that's would be best.
Best regards,
Jernej
>
> > Best regards,
> > Jernej
> >
> > > Signed-off-by: Roman Stratiienko <[email protected]>
> > > ---
> > >
> > > drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 4 ++++
> > > 1 file changed, 4 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > > b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c index
> > > bd0e6a52d1d8..07c27e6a4b77
> > > 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> > > @@ -404,17 +404,21 @@ static const struct drm_plane_funcs
> > > sun8i_vi_layer_funcs = { static const u32 sun8i_vi_layer_formats[] = {
> > >
> > > DRM_FORMAT_ABGR1555,
> > > DRM_FORMAT_ABGR4444,
> > >
> > > + DRM_FORMAT_ABGR8888,
> > >
> > > DRM_FORMAT_ARGB1555,
> > > DRM_FORMAT_ARGB4444,
> > >
> > > + DRM_FORMAT_ARGB8888,
> > >
> > > DRM_FORMAT_BGR565,
> > > DRM_FORMAT_BGR888,
> > > DRM_FORMAT_BGRA5551,
> > > DRM_FORMAT_BGRA4444,
> > >
> > > + DRM_FORMAT_BGRA8888,
> > >
> > > DRM_FORMAT_BGRX8888,
> > > DRM_FORMAT_RGB565,
> > > DRM_FORMAT_RGB888,
> > > DRM_FORMAT_RGBA4444,
> > > DRM_FORMAT_RGBA5551,
> > >
> > > + DRM_FORMAT_RGBA8888,
> > >
> > > DRM_FORMAT_RGBX8888,
> > > DRM_FORMAT_XBGR8888,
> > > DRM_FORMAT_XRGB8888,