On Mon, Sep 12, 2016 at 9:01 AM, Marek Olšák <mar...@gmail.com> wrote:
> On Thu, Sep 8, 2016 at 10:30 PM, Rob Clark <robdcl...@gmail.com> wrote:
>> Support multi-planar YUV for external EGLImage's (currently just in the
>> dma-buf import path) by lowering to multiple texture fetch's for each
>> plane and CSC in shader.
>>
>> Signed-off-by: Rob Clark <robdcl...@gmail.com>
>> ---
>> src/gallium/auxiliary/util/u_inlines.h | 4 +-
>> src/gallium/include/pipe/p_state.h | 9 +++
>> src/gallium/include/state_tracker/st_api.h | 3 +
>> src/gallium/state_trackers/dri/dri2.c | 119
>> +++++++++++++++++++++++-----
>> src/gallium/state_trackers/dri/dri_screen.c | 11 +++
>> src/mesa/main/mtypes.h | 16 ++++
>> src/mesa/program/ir_to_mesa.cpp | 1 +
>> src/mesa/state_tracker/st_atom_sampler.c | 41 +++++++++-
>> src/mesa/state_tracker/st_atom_shader.c | 3 +
>> src/mesa/state_tracker/st_atom_texture.c | 58 ++++++++++++++
>> src/mesa/state_tracker/st_cb_eglimage.c | 18 +++++
>> src/mesa/state_tracker/st_context.c | 7 +-
>> src/mesa/state_tracker/st_glsl_to_nir.cpp | 1 +
>> src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 4 +
>> src/mesa/state_tracker/st_manager.c | 1 +
>> src/mesa/state_tracker/st_program.c | 35 ++++++++
>> src/mesa/state_tracker/st_program.h | 37 +++++++++
>> src/mesa/state_tracker/st_texture.h | 21 +++++
>> 18 files changed, 362 insertions(+), 27 deletions(-)
>>
>> diff --git a/src/gallium/auxiliary/util/u_inlines.h
>> b/src/gallium/auxiliary/util/u_inlines.h
>> index c2a0b08..b7b8313 100644
>> --- a/src/gallium/auxiliary/util/u_inlines.h
>> +++ b/src/gallium/auxiliary/util/u_inlines.h
>> @@ -136,8 +136,10 @@ pipe_resource_reference(struct pipe_resource **ptr,
>> struct pipe_resource *tex)
>> struct pipe_resource *old_tex = *ptr;
>>
>> if (pipe_reference_described(&(*ptr)->reference, &tex->reference,
>> -
>> (debug_reference_descriptor)debug_describe_resource))
>> +
>> (debug_reference_descriptor)debug_describe_resource)) {
>> + pipe_resource_reference(&old_tex->next, NULL);
>> old_tex->screen->resource_destroy(old_tex->screen, old_tex);
>> + }
>> *ptr = tex;
>> }
>>
>> diff --git a/src/gallium/include/pipe/p_state.h
>> b/src/gallium/include/pipe/p_state.h
>> index ebd0337..4a88da6 100644
>> --- a/src/gallium/include/pipe/p_state.h
>> +++ b/src/gallium/include/pipe/p_state.h
>> @@ -498,6 +498,15 @@ struct pipe_resource
>>
>> unsigned bind; /**< bitmask of PIPE_BIND_x */
>> unsigned flags; /**< bitmask of PIPE_RESOURCE_FLAG_x */
>> +
>> + /**
>> + * For planar images, ie. YUV EGLImage external, etc, pointer to the
>> + * next plane.
>> + *
>> + * TODO might be useful for dealing w/ z32s8 too, since at least a
>> + * couple drivers split these out into separate buffers internally.
>> + */
>
> Please remove this TODO. Radeon can't do separate depth & stencil.
> Yes, radeon allocates them separately, but they share the tiling mode
> and HyperZ metadata, which is interleaved.
>
>> + struct pipe_resource *next;
>
> How about this:
> - pipe_resource::next will be removed.
> - all planes will be backed by the same pipe_resource
> - resource_from_handle will receive information about all planes.
> (whatever you need)
> - PIPE_FORMAT_XX_XX_XX_PLANAR will be added; replace XX with formats
> of planes (define as many formats as you need)
> - pipe_sampler_view::u::tex::first_layer will be used to select the plane.
> - the driver will look at first_layer and the format and will set up
> texture sampling from that plane
>
> What do you think?
Hmm, this approach does end up needing some per-driver work, which I
was hoping to avoid.. and I guess in the end support for most of the
drivers will be needed: virtio/vc4/freedreno (linaro/aosp) and
amdgpu/radeon/nouveau (android-x86). It does sound like maybe less
churn in mesa/st, but otoh more churn in all the drivers. Plus having
to re-work 'struct winsys_handle' to take an array of
handle/stride/offset (and eventually modifier for tiled yuv, similar
to how addfb2 works)..
So it probably ends up being more churn than just making
st_texture_object::pt an array (which I was going to try, time
permitting, this week).
On the plus side, maybe it would be easier for video state-trackers,
although I think pipe_resource::next approach has the same advantage.
BR,
-R
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