[PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

[PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

[Lyude Paul]

Nvidia hardware doesn't actually support using tiling formats with the
cursor plane, only linear is allowed. In the future, we should write a
testcase for this.

Fixes: c586f30bf74c ("drm/nouveau/kms: Add format mod prop to base/ovly/nvdisp")
Cc: James Jones <jajones@nvidia.com>
Cc: Martin Peres <martin.peres@free.fr>
Cc: Jeremy Cline <jcline@redhat.com>
Cc: Simon Ser <contact@emersion.fr>
Cc: <stable@vger.kernel.org> # v5.8+
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/nouveau/dispnv50/wndw.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
index ce451242f79e..271de3a63f21 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
@@ -702,6 +702,11 @@ nv50_wndw_init(struct nv50_wndw *wndw)
 	nvif_notify_get(&wndw->notify);
 }
 
+static const u64 nv50_cursor_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID,
+};
+
 int
 nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
 	       enum drm_plane_type type, const char *name, int index,
@@ -713,6 +718,7 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
 	struct nvif_mmu *mmu = &drm->client.mmu;
 	struct nv50_disp *disp = nv50_disp(dev);
 	struct nv50_wndw *wndw;
+	const u64 *format_modifiers;
 	int nformat;
 	int ret;
 
@@ -728,10 +734,13 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
 
 	for (nformat = 0; format[nformat]; nformat++);
 
-	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
-				       format, nformat,
-				       nouveau_display(dev)->format_modifiers,
-				       type, "%s-%d", name, index);
+	if (type == DRM_PLANE_TYPE_CURSOR)
+		format_modifiers = nv50_cursor_format_modifiers;
+	else
+		format_modifiers = nouveau_display(dev)->format_modifiers;
+
+	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw, format, nformat,
+				       format_modifiers, type, "%s-%d", name, index);
 	if (ret) {
 		kfree(*pwndw);
 		*pwndw = NULL;
-- 
2.29.2

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[PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Lyude Paul]

Cc: Martin Peres <martin.peres@free.fr>
Cc: Jeremy Cline <jcline@redhat.com>
Cc: Simon Ser <contact@emersion.fr>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index c6367035970e..5f4f09a601d4 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
 	else
 		nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
 
+	if (disp->disp->object.oclass >= GK104_DISP) {
+		dev->mode_config.cursor_width = 256;
+		dev->mode_config.cursor_height = 256;
+	} else {
+		dev->mode_config.cursor_width = 64;
+		dev->mode_config.cursor_height = 64;
+	}
+
 	/* create crtc objects to represent the hw heads */
 	if (disp->disp->object.oclass >= GV100_DISP)
 		crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
-- 
2.29.2

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Simon Ser]

On Tuesday, January 19th, 2021 at 2:54 AM, Lyude Paul <lyude@redhat.com> wrote:

> Cc: Martin Peres <martin.peres@free.fr>
> Cc: Jeremy Cline <jcline@redhat.com>
> Cc: Simon Ser <contact@emersion.fr>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index c6367035970e..5f4f09a601d4 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
>  	else
>  		nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
>
> +	if (disp->disp->object.oclass >= GK104_DISP) {

I can confirm this works fine on GK208B. Tested with wlroots. I don't
have older cards to test, though.

Tested-by: Simon Ser <contact@emersion.fr>

> +		dev->mode_config.cursor_width = 256;
> +		dev->mode_config.cursor_height = 256;
> +	} else {
> +		dev->mode_config.cursor_width = 64;
> +		dev->mode_config.cursor_height = 64;
> +	}
> +
>  	/* create crtc objects to represent the hw heads */
>  	if (disp->disp->object.oclass >= GV100_DISP)
>  		crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
> --
> 2.29.2

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Lyude Paul, Tue, Jan 19, 2021 02:54:13 +0100:
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index c6367035970e..5f4f09a601d4 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
>  	else
>  		nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
>  
> +	if (disp->disp->object.oclass >= GK104_DISP) {
> +		dev->mode_config.cursor_width = 256;
> +		dev->mode_config.cursor_height = 256;
> +	} else {
> +		dev->mode_config.cursor_width = 64;
> +		dev->mode_config.cursor_height = 64;
> +	}
> +
>  	/* create crtc objects to represent the hw heads */
>  	if (disp->disp->object.oclass >= GV100_DISP)
>  		crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;

This change broke X cursor in my setup, and reverting the commit restores it.

Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
libdrm 2.4.91-1 (Debian 10.8 stable).
There are no errors or warnings in Xorg logs nor in the kernel log.

Regards,
Alex
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Tue, Feb 23, 2021 at 9:26 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Lyude Paul, Tue, Jan 19, 2021 02:54:13 +0100:
> > diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > index c6367035970e..5f4f09a601d4 100644
> > --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > @@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
> >       else
> >               nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
> >
> > +     if (disp->disp->object.oclass >= GK104_DISP) {
> > +             dev->mode_config.cursor_width = 256;
> > +             dev->mode_config.cursor_height = 256;
> > +     } else {
> > +             dev->mode_config.cursor_width = 64;
> > +             dev->mode_config.cursor_height = 64;
> > +     }
> > +
> >       /* create crtc objects to represent the hw heads */
> >       if (disp->disp->object.oclass >= GV100_DISP)
> >               crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
>
> This change broke X cursor in my setup, and reverting the commit restores it.
>
> Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
> libdrm 2.4.91-1 (Debian 10.8 stable).
> There are no errors or warnings in Xorg logs nor in the kernel log.

Hi Alex,

Could you confirm which ddx is driving the nvidia hw? You can find
this out by running "xrandr --listproviders", or also in the xorg log.

Thanks,

  -ilia
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Tue, Feb 23, 2021 15:56:21 +0100:
> On Tue, Feb 23, 2021 at 9:26 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Lyude Paul, Tue, Jan 19, 2021 02:54:13 +0100:
> > > diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > index c6367035970e..5f4f09a601d4 100644
> > > --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > @@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
> > >       else
> > >               nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
> > >
> > > +     if (disp->disp->object.oclass >= GK104_DISP) {
> > > +             dev->mode_config.cursor_width = 256;
> > > +             dev->mode_config.cursor_height = 256;
> > > +     } else {
> > > +             dev->mode_config.cursor_width = 64;
> > > +             dev->mode_config.cursor_height = 64;
> > > +     }
> > > +
> > >       /* create crtc objects to represent the hw heads */
> > >       if (disp->disp->object.oclass >= GV100_DISP)
> > >               crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
> >
> > This change broke X cursor in my setup, and reverting the commit restores it.
> >
> > Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
> > libdrm 2.4.91-1 (Debian 10.8 stable).
> > There are no errors or warnings in Xorg logs nor in the kernel log.
> 
> Could you confirm which ddx is driving the nvidia hw? You can find
> this out by running "xrandr --listproviders", or also in the xorg log.

xrandr(1) does not seem to list much:

$ xrandr --listproviders
Providers: number : 1
Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 5 associated providers: 0 name:modesetting

I failed to find a DDX in Xorg.0.log. Both Xorg.0.log and dmesg can be seen here:

    https://gist.github.com/ar-cetitec/68c27551d9a59b89dc73bffe0456bbef


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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Tue, Feb 23, 2021 at 10:36 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Ilia Mirkin, Tue, Feb 23, 2021 15:56:21 +0100:
> > On Tue, Feb 23, 2021 at 9:26 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > > Lyude Paul, Tue, Jan 19, 2021 02:54:13 +0100:
> > > > diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > > index c6367035970e..5f4f09a601d4 100644
> > > > --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > > +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > > > @@ -2663,6 +2663,14 @@ nv50_display_create(struct drm_device *dev)
> > > >       else
> > > >               nouveau_display(dev)->format_modifiers = disp50xx_modifiers;
> > > >
> > > > +     if (disp->disp->object.oclass >= GK104_DISP) {
> > > > +             dev->mode_config.cursor_width = 256;
> > > > +             dev->mode_config.cursor_height = 256;
> > > > +     } else {
> > > > +             dev->mode_config.cursor_width = 64;
> > > > +             dev->mode_config.cursor_height = 64;
> > > > +     }
> > > > +
> > > >       /* create crtc objects to represent the hw heads */
> > > >       if (disp->disp->object.oclass >= GV100_DISP)
> > > >               crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
> > >
> > > This change broke X cursor in my setup, and reverting the commit restores it.
> > >
> > > Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
> > > libdrm 2.4.91-1 (Debian 10.8 stable).
> > > There are no errors or warnings in Xorg logs nor in the kernel log.
> >
> > Could you confirm which ddx is driving the nvidia hw? You can find
> > this out by running "xrandr --listproviders", or also in the xorg log.
>
> xrandr(1) does not seem to list much:
>
> $ xrandr --listproviders
> Providers: number : 1
> Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 5 associated providers: 0 name:modesetting

Thanks - this is what I was looking for. name:modesetting, i.e. the
modesetting ddx driver.

I checked nouveau source, and it seems like it uses a 64x64 cursor no
matter what. Not sure what the modesetting ddx does.

I'd recommend using xf86-video-nouveau in any case, but some distros
have decided to explicitly force modesetting in preference of nouveau.
Oh well. (And regardless, the regression should be addressed somehow,
but it's also good to understand what the problem is.)

Can you confirm what the problem with the cursor is?

  -ilia
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Tue, Feb 23, 2021 16:46:52 +0100:
> On Tue, Feb 23, 2021 at 10:36 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Ilia Mirkin, Tue, Feb 23, 2021 15:56:21 +0100:
> > > On Tue, Feb 23, 2021 at 9:26 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > > >
> > > > This change broke X cursor in my setup, and reverting the commit restores it.
> > > >
> > > > Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
> > > > libdrm 2.4.91-1 (Debian 10.8 stable).
> > > > There are no errors or warnings in Xorg logs nor in the kernel log.
> > >
> > > Could you confirm which ddx is driving the nvidia hw? You can find
> > > this out by running "xrandr --listproviders", or also in the xorg log.
> >
> > xrandr(1) does not seem to list much:
> >
> > $ xrandr --listproviders
> > Providers: number : 1
> > Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 5 associated providers: 0 name:modesetting
> 
> Thanks - this is what I was looking for. name:modesetting, i.e. the
> modesetting ddx driver.
> 
> I checked nouveau source, and it seems like it uses a 64x64 cursor no
> matter what. Not sure what the modesetting ddx does.
> 
> I'd recommend using xf86-video-nouveau in any case, but some distros

I would like try this out. Do you know how to force the xorg server to
choose this driver instead of modesetting?

> have decided to explicitly force modesetting in preference of nouveau.
> Oh well. (And regardless, the regression should be addressed somehow,
> but it's also good to understand what the problem is.)
>
> Can you confirm what the problem with the cursor is?

The cursor looks stretched vertically over a bigger matrix, while missing some
lines and being wrapped over the bottom on top of that matrix.

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Alex Riesen, Tue, Feb 23, 2021 16:51:26 +0100:
> Ilia Mirkin, Tue, Feb 23, 2021 16:46:52 +0100:
> > I'd recommend using xf86-video-nouveau in any case, but some distros
> 
> I would like try this out. Do you know how to force the xorg server to
> choose this driver instead of modesetting?

Found that myself (a Device section with Driver set to "nouveau"):

    $ xrandr  --listproviders
    Providers: number : 1
    Provider 0: id: 0x68 cap: 0x7, Source Output, Sink Output, Source Offload crtcs: 4 outputs: 5 associated providers: 0 name:nouveau

And yes, the cursor looks good in v5.11 even without reverting the commit.

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Tue, Feb 23, 2021 at 11:23 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Alex Riesen, Tue, Feb 23, 2021 16:51:26 +0100:
> > Ilia Mirkin, Tue, Feb 23, 2021 16:46:52 +0100:
> > > I'd recommend using xf86-video-nouveau in any case, but some distros
> >
> > I would like try this out. Do you know how to force the xorg server to
> > choose this driver instead of modesetting?
>
> Found that myself (a Device section with Driver set to "nouveau"):
>
>     $ xrandr  --listproviders
>     Providers: number : 1
>     Provider 0: id: 0x68 cap: 0x7, Source Output, Sink Output, Source Offload crtcs: 4 outputs: 5 associated providers: 0 name:nouveau
>
> And yes, the cursor looks good in v5.11 even without reverting the commit.

FWIW it's not immediately apparent to me what grave error modesetting
is committing in setting the cursor. The logic looks perfectly
reasonable. It's not trying to be fancy with rendering the cursor/etc.

The one thing is that it's using drmModeSetCursor2 which sets the
hotspot at the same time. But internally inside nouveau I think it
should work out to the same thing. Perhaps setting the hotspot, or
something in that path, doesn't quite work for 256x256? [Again, no
clue what that might be.]

It might also be worthwhile just testing if the 256x256 cursor works
quite the way one would want. If you're interested, grab libdrm,
there's a test called 'modetest', which has an option to enable a
moving cursor (-c iirc). It's hard-coded to 64x64, so you'll have to
modify it there too (and probably change the pattern from plain gray
to any one of the other ones).

Cheers,

  -ilia
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Tue, Feb 23, 2021 19:13:59 +0100:
> On Tue, Feb 23, 2021 at 11:23 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> >
> >     $ xrandr  --listproviders
> >     Providers: number : 1
> >     Provider 0: id: 0x68 cap: 0x7, Source Output, Sink Output, Source Offload crtcs: 4 outputs: 5 associated providers: 0 name:nouveau
> >
> > And yes, the cursor looks good in v5.11 even without reverting the commit.
> 
> FWIW it's not immediately apparent to me what grave error modesetting
> is committing in setting the cursor. The logic looks perfectly
> reasonable. It's not trying to be fancy with rendering the cursor/etc.
> 
> The one thing is that it's using drmModeSetCursor2 which sets the
> hotspot at the same time. But internally inside nouveau I think it
> should work out to the same thing. Perhaps setting the hotspot, or
> something in that path, doesn't quite work for 256x256? [Again, no
> clue what that might be.]
> 
> It might also be worthwhile just testing if the 256x256 cursor works
> quite the way one would want. If you're interested, grab libdrm,
> there's a test called 'modetest', which has an option to enable a
> moving cursor (-c iirc). It's hard-coded to 64x64, so you'll have to
> modify it there too (and probably change the pattern from plain gray
> to any one of the other ones).

I am interested, so I did.

If I start the test without X running, the sprite of 256x256 cursor always
contained horizontal lines across it, both with commit reverted and vanilla
v5.11. Similarly, the 64x64 cursor has no lines across it in both kernels.

The test does not seem to work at all if there is an X server running (using
modesetting driver): modetest complained about permission denied to set the
mode, and just sits there, drawing nothing on the displays.
So I could not run the test in the environment of original problem.
Am I starting it correctly? Is the change in modetest.c correct?

    $ ./modetest -c |grep '^[0-9]\|preferred'
    85	86	connected	LVDS-1         	340x190		13	86
      #0 1920x1080 60.01 1920 2010 2070 2226 1080 1086 1095 1142 152540 flags: phsync, nvsync; type: preferred, driver
    87	89	connected	DP-1           	470x300		18	88, 89
      #0 1680x1050 59.88 1680 1728 1760 1840 1050 1053 1059 1080 119000 flags: phsync, nvsync; type: preferred, driver
    90	0	disconnected	DP-2           	0x0		0	91, 92
    93	95	connected	DP-3           	520x320		10	94, 95
      #0 1920x1200 59.95 1920 1968 2000 2080 1200 1203 1209 1235 154000 flags: phsync, nvsync; type: preferred, driver
    96	0	disconnected	VGA-1          	0x0		0	97

    $ ./modetest -s 85:1920x1080 -s 93:1920x1200 -s 87:1680x1050  -C
    trying to open device 'i915'...failed
    trying to open device 'amdgpu'...failed
    trying to open device 'radeon'...failed
    trying to open device 'nouveau'...done
    setting mode 1920x1080-60.01Hz on connectors 85, crtc 50
    starting cursor

    cursor stopped

This is the change on top of 1225171b (master):

diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
index fc75383a..cdba7b4e 100644
--- a/tests/modetest/modetest.c
+++ b/tests/modetest/modetest.c
@@ -1730,14 +1730,14 @@ static void set_cursors(struct device *dev, struct pipe_arg *pipes, unsigned int
 	int ret;
 
 	/* maybe make cursor width/height configurable some day */
-	uint32_t cw = 64;
-	uint32_t ch = 64;
+	uint32_t cw = 256;
+	uint32_t ch = 256;
 
 	/* create cursor bo.. just using PATTERN_PLAIN as it has
 	 * translucent alpha
 	 */
 	bo = bo_create(dev->fd, DRM_FORMAT_ARGB8888, cw, ch, handles, pitches,
-		       offsets, UTIL_PATTERN_PLAIN);
+		       offsets, UTIL_PATTERN_SMPTE);
 	if (bo == NULL)
 		return;

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

[+emersion, -various people and lists who definitely don't care]

On Wed, Feb 24, 2021 at 4:09 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Ilia Mirkin, Tue, Feb 23, 2021 19:13:59 +0100:
> > On Tue, Feb 23, 2021 at 11:23 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > >
> > >     $ xrandr  --listproviders
> > >     Providers: number : 1
> > >     Provider 0: id: 0x68 cap: 0x7, Source Output, Sink Output, Source Offload crtcs: 4 outputs: 5 associated providers: 0 name:nouveau
> > >
> > > And yes, the cursor looks good in v5.11 even without reverting the commit.
> >
> > FWIW it's not immediately apparent to me what grave error modesetting
> > is committing in setting the cursor. The logic looks perfectly
> > reasonable. It's not trying to be fancy with rendering the cursor/etc.
> >
> > The one thing is that it's using drmModeSetCursor2 which sets the
> > hotspot at the same time. But internally inside nouveau I think it
> > should work out to the same thing. Perhaps setting the hotspot, or
> > something in that path, doesn't quite work for 256x256? [Again, no
> > clue what that might be.]
> >
> > It might also be worthwhile just testing if the 256x256 cursor works
> > quite the way one would want. If you're interested, grab libdrm,
> > there's a test called 'modetest', which has an option to enable a
> > moving cursor (-c iirc). It's hard-coded to 64x64, so you'll have to
> > modify it there too (and probably change the pattern from plain gray
> > to any one of the other ones).
>
> I am interested, so I did.
>
> If I start the test without X running, the sprite of 256x256 cursor always
> contained horizontal lines across it, both with commit reverted and vanilla
> v5.11. Similarly, the 64x64 cursor has no lines across it in both kernels.
>
> The test does not seem to work at all if there is an X server running (using
> modesetting driver): modetest complained about permission denied to set the
> mode, and just sits there, drawing nothing on the displays.
> So I could not run the test in the environment of original problem.
> Am I starting it correctly? Is the change in modetest.c correct?

Looks right. Although TBH I'd just start it on a single display (I
forgot you could even do multiple displays). You should be able to
start it with the X server running if you switch to a vt (and run it
as root). If you can't, that means the modesetting driver is
forgetting to do something in the LeaveVT function.

The fact that you're getting lines with modetest means there's
something wrong with 256x256. What if you do 128x128 -- does that work
OK?

Simon, you tested on a GK208, that has a slightly later display
controller than the GK104 -- can you try to reproduce Alex's results?
Perhaps there was a problem with the GK10x's and it starts working OK
with the GK110 disp.

I don't have any GK10x's in my posession (I have nearly every other
iteration of the display controller), but hopefully someone on the
nouveau team will be able to dig one up and reproduce.

Thanks for testing, Alex!

>
>     $ ./modetest -c |grep '^[0-9]\|preferred'
>     85  86      connected       LVDS-1          340x190         13      86
>       #0 1920x1080 60.01 1920 2010 2070 2226 1080 1086 1095 1142 152540 flags: phsync, nvsync; type: preferred, driver
>     87  89      connected       DP-1            470x300         18      88, 89
>       #0 1680x1050 59.88 1680 1728 1760 1840 1050 1053 1059 1080 119000 flags: phsync, nvsync; type: preferred, driver
>     90  0       disconnected    DP-2            0x0             0       91, 92
>     93  95      connected       DP-3            520x320         10      94, 95
>       #0 1920x1200 59.95 1920 1968 2000 2080 1200 1203 1209 1235 154000 flags: phsync, nvsync; type: preferred, driver
>     96  0       disconnected    VGA-1           0x0             0       97
>
>     $ ./modetest -s 85:1920x1080 -s 93:1920x1200 -s 87:1680x1050  -C
>     trying to open device 'i915'...failed
>     trying to open device 'amdgpu'...failed
>     trying to open device 'radeon'...failed
>     trying to open device 'nouveau'...done
>     setting mode 1920x1080-60.01Hz on connectors 85, crtc 50
>     starting cursor
>
>     cursor stopped
>
> This is the change on top of 1225171b (master):
>
> diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
> index fc75383a..cdba7b4e 100644
> --- a/tests/modetest/modetest.c
> +++ b/tests/modetest/modetest.c
> @@ -1730,14 +1730,14 @@ static void set_cursors(struct device *dev, struct pipe_arg *pipes, unsigned int
>         int ret;
>
>         /* maybe make cursor width/height configurable some day */
> -       uint32_t cw = 64;
> -       uint32_t ch = 64;
> +       uint32_t cw = 256;
> +       uint32_t ch = 256;
>
>         /* create cursor bo.. just using PATTERN_PLAIN as it has
>          * translucent alpha
>          */
>         bo = bo_create(dev->fd, DRM_FORMAT_ARGB8888, cw, ch, handles, pitches,
> -                      offsets, UTIL_PATTERN_PLAIN);
> +                      offsets, UTIL_PATTERN_SMPTE);
>         if (bo == NULL)
>                 return;
>
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Wed, Feb 24, 2021 16:10:57 +0100:
> On Wed, Feb 24, 2021 at 4:09 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Ilia Mirkin, Tue, Feb 23, 2021 19:13:59 +0100:
> > > It might also be worthwhile just testing if the 256x256 cursor works
> > > quite the way one would want. If you're interested, grab libdrm,
> > > there's a test called 'modetest', which has an option to enable a
> > > moving cursor (-c iirc). It's hard-coded to 64x64, so you'll have to
> > > modify it there too (and probably change the pattern from plain gray
> > > to any one of the other ones).
> >
> > I am interested, so I did.
> >
> > If I start the test without X running, the sprite of 256x256 cursor always
> > contained horizontal lines across it, both with commit reverted and vanilla
> > v5.11. Similarly, the 64x64 cursor has no lines across it in both kernels.
> >
> > The test does not seem to work at all if there is an X server running (using
> > modesetting driver): modetest complained about permission denied to set the
> > mode, and just sits there, drawing nothing on the displays.
> > So I could not run the test in the environment of original problem.
> > Am I starting it correctly? Is the change in modetest.c correct?
> 
> Looks right. Although TBH I'd just start it on a single display (I
> forgot you could even do multiple displays). You should be able to
> start it with the X server running if you switch to a vt (and run it
> as root). If you can't, that means the modesetting driver is
> forgetting to do something in the LeaveVT function.

Tried that and yes, modetest works. Even without running it as root.

> The fact that you're getting lines with modetest means there's
> something wrong with 256x256. What if you do 128x128 -- does that work
> OK?

Yes. Unfortunately in both cases.

> Simon, you tested on a GK208, that has a slightly later display
> controller than the GK104 -- can you try to reproduce Alex's results?
> Perhaps there was a problem with the GK10x's and it starts working OK
> with the GK110 disp.
> 
> I don't have any GK10x's in my posession (I have nearly every other
> iteration of the display controller), but hopefully someone on the
> nouveau team will be able to dig one up and reproduce.
> 
> Thanks for testing, Alex!

You're welcome! As I'm stuck with this particular machine for foreseeable
future, you can count on mine GK10x as well.

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Wed, Feb 24, 2021 at 11:35 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
> Ilia Mirkin, Wed, Feb 24, 2021 16:10:57 +0100:
> > The fact that you're getting lines with modetest means there's
> > something wrong with 256x256. What if you do 128x128 -- does that work
> > OK?
>
> Yes. Unfortunately in both cases.

Just to be crystal clear -- are you saying that 128x128 works or does
not work? (You said "yes", which would imply it works OK, but then you
said both cases, which would imply doesn't work since 256x256 doesn't
work?)

Thanks,

  -ilia
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Wed, Feb 24, 2021 17:48:39 +0100:
> On Wed, Feb 24, 2021 at 11:35 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Ilia Mirkin, Wed, Feb 24, 2021 16:10:57 +0100:
> > > The fact that you're getting lines with modetest means there's
> > > something wrong with 256x256. What if you do 128x128 -- does that work
> > > OK?
> >
> > Yes. Unfortunately in both cases.
> 
> Just to be crystal clear -- are you saying that 128x128 works or does
> not work? (You said "yes", which would imply it works OK, but then you
> said both cases, which would imply doesn't work since 256x256 doesn't
> work?)

Modetest with 128x128 cursor works. Without damage to the cursor: modetest
shows normal cursor in vanilla v5.11. Modetest also shows normal cursor in
vanilla v5.11 with the commit reverted.

Which is unfortunate, as the only way to see the damaged cursor is to start
the X environment with modesetting DDX driver.

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Wed, Feb 24, 2021 at 11:53 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Ilia Mirkin, Wed, Feb 24, 2021 17:48:39 +0100:
> > On Wed, Feb 24, 2021 at 11:35 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > > Ilia Mirkin, Wed, Feb 24, 2021 16:10:57 +0100:
> > > > The fact that you're getting lines with modetest means there's
> > > > something wrong with 256x256. What if you do 128x128 -- does that work
> > > > OK?
> > >
> > > Yes. Unfortunately in both cases.
> >
> > Just to be crystal clear -- are you saying that 128x128 works or does
> > not work? (You said "yes", which would imply it works OK, but then you
> > said both cases, which would imply doesn't work since 256x256 doesn't
> > work?)
>
> Modetest with 128x128 cursor works. Without damage to the cursor: modetest
> shows normal cursor in vanilla v5.11. Modetest also shows normal cursor in
> vanilla v5.11 with the commit reverted.

But modetest with 256x256 doesn't work (correctly) right? Or did I
misunderstand?

All the patch does is allow those large cursors to be used, which gets
reported via drm APIs and modesetting picks the largest cursor
available. (And actually I think it's even not required to use the
large cursors, it just controls what's reported in the defaults to
userspace.)

Thanks,

  -ilia
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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Wed, Feb 24, 2021 17:57:41 +0100:
> On Wed, Feb 24, 2021 at 11:53 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Ilia Mirkin, Wed, Feb 24, 2021 17:48:39 +0100:
> > > Just to be crystal clear -- are you saying that 128x128 works or does
> > > not work? (You said "yes", which would imply it works OK, but then you
> > > said both cases, which would imply doesn't work since 256x256 doesn't
> > > work?)
> >
> > Modetest with 128x128 cursor works. Without damage to the cursor: modetest
> > shows normal cursor in vanilla v5.11. Modetest also shows normal cursor in
> > vanilla v5.11 with the commit reverted.
> 
> But modetest with 256x256 doesn't work (correctly) right? Or did I
> misunderstand?

Right. That's why I was asking if I did everything right: it was just corrupted
in both kernels.

> All the patch does is allow those large cursors to be used, which gets
> reported via drm APIs and modesetting picks the largest cursor
> available. (And actually I think it's even not required to use the
> large cursors, it just controls what's reported in the defaults to
> userspace.)

Maybe something in X code is not prepared to handle the kernel reporting
large cursor support? Even though 128x128 is pretty large, and I don't think
I even use that large cursors in X configuration. How can I check?

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Re: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Ilia Mirkin]

On Wed, Feb 24, 2021 at 12:03 PM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
>
> Ilia Mirkin, Wed, Feb 24, 2021 17:57:41 +0100:
> > On Wed, Feb 24, 2021 at 11:53 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > > Ilia Mirkin, Wed, Feb 24, 2021 17:48:39 +0100:
> > > > Just to be crystal clear -- are you saying that 128x128 works or does
> > > > not work? (You said "yes", which would imply it works OK, but then you
> > > > said both cases, which would imply doesn't work since 256x256 doesn't
> > > > work?)
> > >
> > > Modetest with 128x128 cursor works. Without damage to the cursor: modetest
> > > shows normal cursor in vanilla v5.11. Modetest also shows normal cursor in
> > > vanilla v5.11 with the commit reverted.
> >
> > But modetest with 256x256 doesn't work (correctly) right? Or did I
> > misunderstand?
>
> Right. That's why I was asking if I did everything right: it was just corrupted
> in both kernels.

OK. So 128x128 works, 256x256 does not. Interesting.

>
> > All the patch does is allow those large cursors to be used, which gets
> > reported via drm APIs and modesetting picks the largest cursor
> > available. (And actually I think it's even not required to use the
> > large cursors, it just controls what's reported in the defaults to
> > userspace.)
>
> Maybe something in X code is not prepared to handle the kernel reporting
> large cursor support? Even though 128x128 is pretty large, and I don't think
> I even use that large cursors in X configuration. How can I check?

Yes, 64x64 is enough for anyone (or was it 640kb?) But it's unlikely
to be an issue. I believe that AMD also exposes 256x256 cursors
depending on the gen:

display/dc/dce100/dce100_resource.c:    dc->caps.max_cursor_size = 128;
display/dc/dce110/dce110_resource.c:    dc->caps.max_cursor_size = 128;
display/dc/dce112/dce112_resource.c:    dc->caps.max_cursor_size = 128;
display/dc/dce120/dce120_resource.c:    dc->caps.max_cursor_size = 128;
display/dc/dce60/dce60_resource.c:      dc->caps.max_cursor_size = 64;
display/dc/dce60/dce60_resource.c:      dc->caps.max_cursor_size = 64;
display/dc/dce60/dce60_resource.c:      dc->caps.max_cursor_size = 64;
display/dc/dce80/dce80_resource.c:      dc->caps.max_cursor_size = 128;
display/dc/dce80/dce80_resource.c:      dc->caps.max_cursor_size = 128;
display/dc/dce80/dce80_resource.c:      dc->caps.max_cursor_size = 128;
display/dc/dcn10/dcn10_resource.c:      dc->caps.max_cursor_size = 256;
display/dc/dcn20/dcn20_resource.c:      dc->caps.max_cursor_size = 256;
display/dc/dcn21/dcn21_resource.c:      dc->caps.max_cursor_size = 256;
display/dc/dcn30/dcn30_resource.c:      dc->caps.max_cursor_size = 256;

which should have the equivalent effect.

But since you're seeing issues with modetest as well (which uses the
ioctl's pretty directly), presumably Xorg is not to blame.

It's easy enough to adjust the kernel to report a lower size (and
reject the larger cursors), I just want to understand which gens are
affected by this.

Cheers,

  -ilia
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[PATCH 3/3] drm/nouveau/kms/nve4-nv138: Fix > 64x64 cursors

[Lyude Paul]

While we do handle the additional cursor sizes introduced in NVE4, it looks
like we accidentally broke this when converting over to use Nvidia's
display headers. Since we now use NVVAL in dispnv50/head907d.c in order to
format the value for the cursor layout and NVD9 only had one byte reserved
vs. the 2 bytes reserved in later generations, we end up accidentally
stripping the second bit in the cursor layout format parameter - causing us
to set the wrong cursor size.

This fixes that by adding our own curs_set hook for 917d which uses the
NV917D headers.

Cc: Martin Peres <martin.peres@free.fr>
Cc: Jeremy Cline <jcline@redhat.com>
Cc: Simon Ser <contact@emersion.fr>
Cc: <stable@vger.kernel.org> # v5.9+
Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: ed0b86a90bf9 ("drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_curs_set()")
---
 drivers/gpu/drm/nouveau/dispnv50/head917d.c   | 28 ++++++++++++++++++-
 .../drm/nouveau/include/nvhw/class/cl917d.h   |  4 +++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/head917d.c b/drivers/gpu/drm/nouveau/dispnv50/head917d.c
index a5d827403660..ea9f8667305e 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/head917d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/head917d.c
@@ -22,6 +22,7 @@
 #include "head.h"
 #include "core.h"
 
+#include "nvif/push.h"
 #include <nvif/push507c.h>
 
 #include <nvhw/class/cl917d.h>
@@ -73,6 +74,31 @@ head917d_base(struct nv50_head *head, struct nv50_head_atom *asyh)
 	return 0;
 }
 
+static int
+head917d_curs_set(struct nv50_head *head, struct nv50_head_atom *asyh)
+{
+	struct nvif_push *push = nv50_disp(head->base.base.dev)->core->chan.push;
+	const int i = head->base.index;
+	int ret;
+
+	ret = PUSH_WAIT(push, 5);
+	if (ret)
+		return ret;
+
+	PUSH_MTHD(push, NV917D, HEAD_SET_CONTROL_CURSOR(i),
+		  NVDEF(NV917D, HEAD_SET_CONTROL_CURSOR, ENABLE, ENABLE) |
+		  NVVAL(NV917D, HEAD_SET_CONTROL_CURSOR, FORMAT, asyh->curs.format) |
+		  NVVAL(NV917D, HEAD_SET_CONTROL_CURSOR, SIZE, asyh->curs.layout) |
+		  NVVAL(NV917D, HEAD_SET_CONTROL_CURSOR, HOT_SPOT_X, 0) |
+		  NVVAL(NV917D, HEAD_SET_CONTROL_CURSOR, HOT_SPOT_Y, 0) |
+		  NVDEF(NV917D, HEAD_SET_CONTROL_CURSOR, COMPOSITION, ALPHA_BLEND),
+
+				HEAD_SET_OFFSET_CURSOR(i), asyh->curs.offset >> 8);
+
+	PUSH_MTHD(push, NV917D, HEAD_SET_CONTEXT_DMA_CURSOR(i), asyh->curs.handle);
+	return 0;
+}
+
 int
 head917d_curs_layout(struct nv50_head *head, struct nv50_wndw_atom *asyw,
 		     struct nv50_head_atom *asyh)
@@ -101,7 +127,7 @@ head917d = {
 	.core_clr = head907d_core_clr,
 	.curs_layout = head917d_curs_layout,
 	.curs_format = head507d_curs_format,
-	.curs_set = head907d_curs_set,
+	.curs_set = head917d_curs_set,
 	.curs_clr = head907d_curs_clr,
 	.base = head917d_base,
 	.ovly = head907d_ovly,
diff --git a/drivers/gpu/drm/nouveau/include/nvhw/class/cl917d.h b/drivers/gpu/drm/nouveau/include/nvhw/class/cl917d.h
index 2a2612d6e1e0..fb223723a38a 100644
--- a/drivers/gpu/drm/nouveau/include/nvhw/class/cl917d.h
+++ b/drivers/gpu/drm/nouveau/include/nvhw/class/cl917d.h
@@ -66,6 +66,10 @@
 #define NV917D_HEAD_SET_CONTROL_CURSOR_COMPOSITION_ALPHA_BLEND                  (0x00000000)
 #define NV917D_HEAD_SET_CONTROL_CURSOR_COMPOSITION_PREMULT_ALPHA_BLEND          (0x00000001)
 #define NV917D_HEAD_SET_CONTROL_CURSOR_COMPOSITION_XOR                          (0x00000002)
+#define NV917D_HEAD_SET_OFFSET_CURSOR(a)                                        (0x00000484 + (a)*0x00000300)
+#define NV917D_HEAD_SET_OFFSET_CURSOR_ORIGIN                                    31:0
+#define NV917D_HEAD_SET_CONTEXT_DMA_CURSOR(a)                                   (0x0000048C + (a)*0x00000300)
+#define NV917D_HEAD_SET_CONTEXT_DMA_CURSOR_HANDLE                               31:0
 #define NV917D_HEAD_SET_DITHER_CONTROL(a)                                       (0x000004A0 + (a)*0x00000300)
 #define NV917D_HEAD_SET_DITHER_CONTROL_ENABLE                                   0:0
 #define NV917D_HEAD_SET_DITHER_CONTROL_ENABLE_DISABLE                           (0x00000000)
-- 
2.29.2

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Re: [PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

[Simon Ser]

On Tuesday, January 19th, 2021 at 2:54 AM, Lyude Paul <lyude@redhat.com> wrote:

> Nvidia hardware doesn't actually support using tiling formats with the
> cursor plane, only linear is allowed. In the future, we should write a
> testcase for this.
>
> Fixes: c586f30bf74c ("drm/nouveau/kms: Add format mod prop to base/ovly/nvdisp")
> Cc: James Jones <jajones@nvidia.com>
> Cc: Martin Peres <martin.peres@free.fr>
> Cc: Jeremy Cline <jcline@redhat.com>
> Cc: Simon Ser <contact@emersion.fr>
> Cc: <stable@vger.kernel.org> # v5.8+
> Signed-off-by: Lyude Paul <lyude@redhat.com>

Together with [1], this patch allows me to run unpatched modifier-aware
user-space successfully, without a cursor visual glitch. drm_info
correctly reports the new modifier list, and wlroots logs confirm that
a flavor of NVIDIA_BLOCK_LINEAR_2D is used for the primary buffers and
LINEAR is used for cursor buffers.

Code looks good to me as well.

Reviewed-by: Simon Ser <contact@emersion.fr>

[1]: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3724
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Re: [PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

[Ville Syrjälä]

On Mon, Jan 18, 2021 at 08:54:12PM -0500, Lyude Paul wrote:
> Nvidia hardware doesn't actually support using tiling formats with the
> cursor plane, only linear is allowed. In the future, we should write a
> testcase for this.

There are a couple of old modifier/format sanity tests here:
https://patchwork.freedesktop.org/series/46876/

Couple of things missing that now came to my mind:
- test setplane/etc. rejects unsupported formats/modifiers even if
  addfb allowed them, exactly for the case where only a subset of
  planes support something
- validate the IN_FORMATS blob harder, eg. make sure each modifier
  listed there supports at least one format. IIRC this was busted on
  a few drivers last year, dunno if they got fixed or not. Hmm,
  actually since this is now using the pre-parsed stuff I guess we
  should just stick an assert into igt_fill_plane_format_mod() where
  the blob gets parsed

> 
> Fixes: c586f30bf74c ("drm/nouveau/kms: Add format mod prop to base/ovly/nvdisp")
> Cc: James Jones <jajones@nvidia.com>
> Cc: Martin Peres <martin.peres@free.fr>
> Cc: Jeremy Cline <jcline@redhat.com>
> Cc: Simon Ser <contact@emersion.fr>
> Cc: <stable@vger.kernel.org> # v5.8+
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/wndw.c | 17 +++++++++++++----
>  1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> index ce451242f79e..271de3a63f21 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> @@ -702,6 +702,11 @@ nv50_wndw_init(struct nv50_wndw *wndw)
>  	nvif_notify_get(&wndw->notify);
>  }
>  
> +static const u64 nv50_cursor_format_modifiers[] = {
> +	DRM_FORMAT_MOD_LINEAR,
> +	DRM_FORMAT_MOD_INVALID,
> +};
> +
>  int
>  nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>  	       enum drm_plane_type type, const char *name, int index,
> @@ -713,6 +718,7 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>  	struct nvif_mmu *mmu = &drm->client.mmu;
>  	struct nv50_disp *disp = nv50_disp(dev);
>  	struct nv50_wndw *wndw;
> +	const u64 *format_modifiers;
>  	int nformat;
>  	int ret;
>  
> @@ -728,10 +734,13 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>  
>  	for (nformat = 0; format[nformat]; nformat++);
>  
> -	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
> -				       format, nformat,
> -				       nouveau_display(dev)->format_modifiers,
> -				       type, "%s-%d", name, index);
> +	if (type == DRM_PLANE_TYPE_CURSOR)
> +		format_modifiers = nv50_cursor_format_modifiers;
> +	else
> +		format_modifiers = nouveau_display(dev)->format_modifiers;
> +
> +	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw, format, nformat,
> +				       format_modifiers, type, "%s-%d", name, index);
>  	if (ret) {
>  		kfree(*pwndw);
>  		*pwndw = NULL;
> -- 
> 2.29.2
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Ville Syrjälä
Intel
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Re: [PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

[James Jones]

Gah, yes, good catch.

Reviewed-by: James Jones <jajones@nvidia.com>

On 1/18/21 5:54 PM, Lyude Paul wrote:
> Nvidia hardware doesn't actually support using tiling formats with the
> cursor plane, only linear is allowed. In the future, we should write a
> testcase for this.
> 
> Fixes: c586f30bf74c ("drm/nouveau/kms: Add format mod prop to base/ovly/nvdisp")
> Cc: James Jones <jajones@nvidia.com>
> Cc: Martin Peres <martin.peres@free.fr>
> Cc: Jeremy Cline <jcline@redhat.com>
> Cc: Simon Ser <contact@emersion.fr>
> Cc: <stable@vger.kernel.org> # v5.8+
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
>   drivers/gpu/drm/nouveau/dispnv50/wndw.c | 17 +++++++++++++----
>   1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> index ce451242f79e..271de3a63f21 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> @@ -702,6 +702,11 @@ nv50_wndw_init(struct nv50_wndw *wndw)
>   	nvif_notify_get(&wndw->notify);
>   }
>   
> +static const u64 nv50_cursor_format_modifiers[] = {
> +	DRM_FORMAT_MOD_LINEAR,
> +	DRM_FORMAT_MOD_INVALID,
> +};
> +
>   int
>   nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>   	       enum drm_plane_type type, const char *name, int index,
> @@ -713,6 +718,7 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>   	struct nvif_mmu *mmu = &drm->client.mmu;
>   	struct nv50_disp *disp = nv50_disp(dev);
>   	struct nv50_wndw *wndw;
> +	const u64 *format_modifiers;
>   	int nformat;
>   	int ret;
>   
> @@ -728,10 +734,13 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
>   
>   	for (nformat = 0; format[nformat]; nformat++);
>   
> -	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
> -				       format, nformat,
> -				       nouveau_display(dev)->format_modifiers,
> -				       type, "%s-%d", name, index);
> +	if (type == DRM_PLANE_TYPE_CURSOR)
> +		format_modifiers = nv50_cursor_format_modifiers;
> +	else
> +		format_modifiers = nouveau_display(dev)->format_modifiers;
> +
> +	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw, format, nformat,
> +				       format_modifiers, type, "%s-%d", name, index);
>   	if (ret) {
>   		kfree(*pwndw);
>   		*pwndw = NULL;
> 
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