by Jessica Zhang

[permalink] [raw]

Subject: Re: [PATCH RFC v5 09/10] drm/msm/dpu: Use DRM solid_fill property

On 7/31/2023 5:52 PM, Dmitry Baryshkov wrote:
> On 01/08/2023 03:39, Jessica Zhang wrote:
>>
>>
>> On 7/30/2023 9:15 PM, Dmitry Baryshkov wrote:
>>> On 28/07/2023 20:02, Jessica Zhang wrote:
>>>> Drop DPU_PLANE_COLOR_FILL_FLAG and check the DRM solid_fill property to
>>>> determine if the plane is solid fill. In addition drop the DPU plane
>>>> color_fill field as we can now use drm_plane_state.solid_fill instead,
>>>> and pass in drm_plane_state.alpha to _dpu_plane_color_fill_pipe() to
>>>> allow userspace to configure the alpha value for the solid fill color.
>>>>
>>>> Reviewed-by: Dmitry Baryshkov <[email protected]>
>>>> Signed-off-by: Jessica Zhang <[email protected]>
>>>> ---
>>>> drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 24
>>>> ++++++++++++++++++------
>>>> 1 file changed, 18 insertions(+), 6 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>>>> index 114c803ff99b..95fc0394d13e 100644
>>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>>>> @@ -42,7 +42,6 @@
>>>> #define SHARP_SMOOTH_THR_DEFAULT    8
>>>> #define SHARP_NOISE_THR_DEFAULT    2
>>>> -#define DPU_PLANE_COLOR_FILL_FLAG    BIT(31)
>>>> #define DPU_ZPOS_MAX 255
>>>> /*
>>>> @@ -82,7 +81,6 @@ struct dpu_plane {
>>>>       enum dpu_sspp pipe;
>>>> -    uint32_t color_fill;
>>>>       bool is_error;
>>>>       bool is_rt_pipe;
>>>>       const struct dpu_mdss_cfg *catalog;
>>>> @@ -606,6 +604,20 @@ static void _dpu_plane_color_fill_pipe(struct
>>>> dpu_plane_state *pstate,
>>>>       _dpu_plane_setup_scaler(pipe, fmt, true, &pipe_cfg,
>>>> pstate->rotation);
>>>> }
>>>> +static uint32_t _dpu_plane_get_bgr_fill_color(struct drm_solid_fill
>>>> solid_fill)
>>>
>>> As I commented for v4 (please excuse me for not responding to your
>>> email at thattime), we can return abgr here, taking
>>> plane->state->alpha into account.
>>
>> Hi Dmitry,
>>
>> Since it seems that this comment wasn't resolved, I can drop your R-B
>> tag in the next revision.
>
> It's a minor issue, so no need to drop the tag.
>
>>
>> From my previous response, I pointed out that the color parameter
>> expects an RGB value [1].
>>
>> So is the intention here to refactor _dpu_plane_color_fill() to accept
>> an ABGR8888 color?
>
> That's what I'm suggesting.

Hi Dmitry,

Got it, sounds good to me.

Thanks,

Jessica Zhang

>
>>
>> Thanks,
>>
>> Jessica Zhang
>>
>> [1]
>> https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c#L676
>>
>>>
>>>> +{
>>>> +    uint32_t ret = 0;
>>>> +    uint8_t b = solid_fill.b >> 24;
>>>> +    uint8_t g = solid_fill.g >> 24;
>>>> +    uint8_t r = solid_fill.r >> 24;
>>>> +
>>>> +    ret |= b << 16;
>>>> +    ret |= g << 8;
>>>> +    ret |= r;
>>>> +
>>>> +    return ret;
>>>> +}
>>>> +
>>>> /**
>>>>    * _dpu_plane_color_fill - enables color fill on plane
>>>>    * @pdpu:   Pointer to DPU plane object
>>>> @@ -977,9 +989,9 @@ void dpu_plane_flush(struct drm_plane *plane)
>>>>       if (pdpu->is_error)
>>>>           /* force white frame with 100% alpha pipe output on error */
>>>>           _dpu_plane_color_fill(pdpu, 0xFFFFFF, 0xFF);
>>>> -    else if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG)
>>>> -        /* force 100% alpha */
>>>> -        _dpu_plane_color_fill(pdpu, pdpu->color_fill, 0xFF);
>>>> +    else if (drm_plane_solid_fill_enabled(plane->state))
>>>> +        _dpu_plane_color_fill(pdpu,
>>>> _dpu_plane_get_bgr_fill_color(plane->state->solid_fill),
>>>> +                plane->state->alpha);
>>>>       else {
>>>>           dpu_plane_flush_csc(pdpu, &pstate->pipe);
>>>>           dpu_plane_flush_csc(pdpu, &pstate->r_pipe);
>>>> @@ -1024,7 +1036,7 @@ static void dpu_plane_sspp_update_pipe(struct
>>>> drm_plane *plane,
>>>>       }
>>>>       /* override for color fill */
>>>> -    if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG) {
>>>> +    if (drm_plane_solid_fill_enabled(plane->state)) {
>>>>           _dpu_plane_set_qos_ctrl(plane, pipe, false);
>>>>           /* skip remaining processing on color fill */
>>>>
>>>
>>> --
>>> With best wishes
>>> Dmitry
>>>
>
> --
> With best wishes
> Dmitry
>

2023-08-08 19:04:57

by Sebastian Wick

[permalink] [raw]

Subject: Re: [PATCH RFC v5 01/10] drm: Introduce pixel_source DRM plane property

On Mon, Aug 7, 2023 at 7:52 PM Jessica Zhang <[email protected]> wrote:
>
>
>
> On 8/4/2023 6:15 AM, Sebastian Wick wrote:
> > On Fri, Jul 28, 2023 at 7:03 PM Jessica Zhang <[email protected]> wrote:
> >>
> >> Add support for pixel_source property to drm_plane and related
> >> documentation. In addition, force pixel_source to
> >> DRM_PLANE_PIXEL_SOURCE_FB in DRM_IOCTL_MODE_SETPLANE as to not break
> >> legacy userspace.
> >>
> >> This enum property will allow user to specify a pixel source for the
> >> plane. Possible pixel sources will be defined in the
> >> drm_plane_pixel_source enum.
> >>
> >> The current possible pixel sources are DRM_PLANE_PIXEL_SOURCE_NONE and
> >> DRM_PLANE_PIXEL_SOURCE_FB with *_PIXEL_SOURCE_FB being the default value.
> >>
> >> Signed-off-by: Jessica Zhang <[email protected]>
> >> ---
> >> drivers/gpu/drm/drm_atomic_state_helper.c | 1 +
> >> drivers/gpu/drm/drm_atomic_uapi.c | 4 ++
> >> drivers/gpu/drm/drm_blend.c | 85 +++++++++++++++++++++++++++++++
> >> drivers/gpu/drm/drm_plane.c | 3 ++
> >> include/drm/drm_blend.h | 2 +
> >> include/drm/drm_plane.h | 21 ++++++++
> >> 6 files changed, 116 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> >> index 784e63d70a42..01638c51ce0a 100644
> >> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> >> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> >> @@ -252,6 +252,7 @@ void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
> >>
> >> plane_state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> >> plane_state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
> >> + plane_state->pixel_source = DRM_PLANE_PIXEL_SOURCE_FB;
> >>
> >> if (plane->color_encoding_property) {
> >> if (!drm_object_property_get_default_value(&plane->base,
> >> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> >> index d867e7f9f2cd..454f980e16c9 100644
> >> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> >> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> >> @@ -544,6 +544,8 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
> >> state->src_w = val;
> >> } else if (property == config->prop_src_h) {
> >> state->src_h = val;
> >> + } else if (property == plane->pixel_source_property) {
> >> + state->pixel_source = val;
> >> } else if (property == plane->alpha_property) {
> >> state->alpha = val;
> >> } else if (property == plane->blend_mode_property) {
> >> @@ -616,6 +618,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
> >> *val = state->src_w;
> >> } else if (property == config->prop_src_h) {
> >> *val = state->src_h;
> >> + } else if (property == plane->pixel_source_property) {
> >> + *val = state->pixel_source;
> >> } else if (property == plane->alpha_property) {
> >> *val = state->alpha;
> >> } else if (property == plane->blend_mode_property) {
> >> diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c
> >> index 6e74de833466..c500310a3d09 100644
> >> --- a/drivers/gpu/drm/drm_blend.c
> >> +++ b/drivers/gpu/drm/drm_blend.c
> >> @@ -185,6 +185,21 @@
> >> * plane does not expose the "alpha" property, then this is
> >> * assumed to be 1.0
> >> *
> >> + * pixel_source:
> >> + * pixel_source is set up with drm_plane_create_pixel_source_property().
> >> + * It is used to toggle the active source of pixel data for the plane.
> >> + * The plane will only display data from the set pixel_source -- any
> >> + * data from other sources will be ignored.
> >> + *
> >> + * Possible values:
> >> + *
> >> + * "NONE":
> >> + * No active pixel source.
> >> + * Committing with a NONE pixel source will disable the plane.
> >> + *
> >> + * "FB":
> >> + * Framebuffer source set by the "FB_ID" property.
> >> + *
> >> * Note that all the property extensions described here apply either to the
> >> * plane or the CRTC (e.g. for the background color, which currently is not
> >> * exposed and assumed to be black).
> >> @@ -615,3 +630,73 @@ int drm_plane_create_blend_mode_property(struct drm_plane *plane,
> >> return 0;
> >> }
> >> EXPORT_SYMBOL(drm_plane_create_blend_mode_property);
> >> +
> >> +/**
> >> + * drm_plane_create_pixel_source_property - create a new pixel source property
> >> + * @plane: DRM plane
> >> + * @extra_sources: Bitmask of additional supported pixel_sources for the driver.
> >> + * DRM_PLANE_PIXEL_SOURCE_FB always be enabled as a supported
> >> + * source.
> >> + *
> >> + * This creates a new property describing the current source of pixel data for the
> >> + * plane. The pixel_source will be initialized as DRM_PLANE_PIXEL_SOURCE_FB by default.
> >> + *
> >> + * Drivers can set a custom default source by overriding the pixel_source value in
> >> + * drm_plane_funcs.reset()
> >> + *
> >> + * The property is exposed to userspace as an enumeration property called
> >> + * "pixel_source" and has the following enumeration values:
> >> + *
> >> + * "NONE":
> >> + * No active pixel source
> >> + *
> >> + * "FB":
> >> + * Framebuffer pixel source
> >> + *
> >> + * Returns:
> >> + * Zero on success, negative errno on failure.
> >> + */
> >> +int drm_plane_create_pixel_source_property(struct drm_plane *plane,
> >> + unsigned long extra_sources)
> >> +{
> >> + struct drm_device *dev = plane->dev;
> >> + struct drm_property *prop;
> >> + static const struct drm_prop_enum_list enum_list[] = {
> >> + { DRM_PLANE_PIXEL_SOURCE_NONE, "NONE" },
> >> + { DRM_PLANE_PIXEL_SOURCE_FB, "FB" },
> >> + };
> >> + static const unsigned int valid_source_mask = BIT(DRM_PLANE_PIXEL_SOURCE_FB);
> >> + int i;
> >> +
> >> + /* FB is supported by default */
> >> + unsigned long supported_sources = extra_sources | BIT(DRM_PLANE_PIXEL_SOURCE_FB);
> >
> > The DRM_PLANE_PIXEL_SOURCE_NONE property should also be enabled by
> > default and in the valid_source_mask.
>
> Hi Sebastian,
>
> Acked.
>
>
> > In a later patch you implement
> > the DRM_PLANE_PIXEL_SOURCE_NONE logic in drm core so everyone gets the
> > enum value for free. Might want to pull that logic into its own patch
> > and move it before this one.
>
> Can you elaborate on this? Are you referring to the "Loosen FB atomic
> checks" patch?
>
> Not sure why it would make sense to loosen the checks before non-FB
> pixel sources are introduced.

Mh, yeah, but just adding the enum value which is not hooked up is not
good either. Both should probably happen in the same patch.

> Thanks,
>
> Jessica Zhang
>
> >
> >> +
> >> + if (WARN_ON(supported_sources & ~valid_source_mask))
> >> + return -EINVAL;
> >> +
> >> + prop = drm_property_create(dev, DRM_MODE_PROP_ENUM | DRM_MODE_PROP_ATOMIC, "pixel_source",
> >> + hweight32(supported_sources));
> >> +
> >> + if (!prop)
> >> + return -ENOMEM;
> >> +
> >> + for (i = 0; i < ARRAY_SIZE(enum_list); i++) {
> >> + int ret;
> >> +
> >> + if (!test_bit(enum_list[i].type, &supported_sources))
> >> + continue;
> >> +
> >> + ret = drm_property_add_enum(prop, enum_list[i].type, enum_list[i].name);
> >> + if (ret) {
> >> + drm_property_destroy(dev, prop);
> >> +
> >> + return ret;
> >> + }
> >> + }
> >> +
> >> + drm_object_attach_property(&plane->base, prop, DRM_PLANE_PIXEL_SOURCE_FB);
> >> + plane->pixel_source_property = prop;
> >> +
> >> + return 0;
> >> +}
> >> +EXPORT_SYMBOL(drm_plane_create_pixel_source_property);
> >> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> >> index 24e7998d1731..f342cf15412b 100644
> >> --- a/drivers/gpu/drm/drm_plane.c
> >> +++ b/drivers/gpu/drm/drm_plane.c
> >> @@ -987,6 +987,9 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
> >> return -ENOENT;
> >> }
> >>
> >> + if (plane->state && plane->state->pixel_source != DRM_PLANE_PIXEL_SOURCE_FB)
> >> + plane->state->pixel_source = DRM_PLANE_PIXEL_SOURCE_FB;
> >> +
> >> if (plane_req->fb_id) {
> >> fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
> >> if (!fb) {
> >> diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h
> >> index 88bdfec3bd88..122bbfbaae33 100644
> >> --- a/include/drm/drm_blend.h
> >> +++ b/include/drm/drm_blend.h
> >> @@ -58,4 +58,6 @@ int drm_atomic_normalize_zpos(struct drm_device *dev,
> >> struct drm_atomic_state *state);
> >> int drm_plane_create_blend_mode_property(struct drm_plane *plane,
> >> unsigned int supported_modes);
> >> +int drm_plane_create_pixel_source_property(struct drm_plane *plane,
> >> + unsigned long extra_sources);
> >> #endif
> >> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> >> index 51291983ea44..89508b4dea4a 100644
> >> --- a/include/drm/drm_plane.h
> >> +++ b/include/drm/drm_plane.h
> >> @@ -40,6 +40,12 @@ enum drm_scaling_filter {
> >> DRM_SCALING_FILTER_NEAREST_NEIGHBOR,
> >> };
> >>
> >> +enum drm_plane_pixel_source {
> >> + DRM_PLANE_PIXEL_SOURCE_NONE,
> >> + DRM_PLANE_PIXEL_SOURCE_FB,
> >> + DRM_PLANE_PIXEL_SOURCE_MAX
> >> +};
> >> +
> >> /**
> >> * struct drm_plane_state - mutable plane state
> >> *
> >> @@ -116,6 +122,14 @@ struct drm_plane_state {
> >> /** @src_h: height of visible portion of plane (in 16.16) */
> >> uint32_t src_h, src_w;
> >>
> >> + /**
> >> + * @pixel_source:
> >> + *
> >> + * Source of pixel information for the plane. See
> >> + * drm_plane_create_pixel_source_property() for more details.
> >> + */
> >> + enum drm_plane_pixel_source pixel_source;
> >> +
> >> /**
> >> * @alpha:
> >> * Opacity of the plane with 0 as completely transparent and 0xffff as
> >> @@ -699,6 +713,13 @@ struct drm_plane {
> >> */
> >> struct drm_plane_state *state;
> >>
> >> + /*
> >> + * @pixel_source_property:
> >> + * Optional pixel_source property for this plane. See
> >> + * drm_plane_create_pixel_source_property().
> >> + */
> >> + struct drm_property *pixel_source_property;
> >> +
> >> /**
> >> * @alpha_property:
> >> * Optional alpha property for this plane. See
> >>
> >> --
> >> 2.41.0
> >>
> >
>