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panfrost: Fix T6XX Support

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While testing kmscube with mesa master, it turns out that kmscube is not
working anymore. After bisecting, commit
5a7688fdec is the culprit. A short trial
and error session allowed to find the removed bit of code making kmscube
working again.

This patch adds it back.

Fixes: 5a7688fde ("panfrost: Use 64-bit descriptors globally")

v2: Add comment pointing out this is magic. [Alyssa, trivial]

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Arnaud Patard 2019-07-23 06:42:00 -07:00 • committed by Alyssa Rosenzweig
parent 83a1d5544a
commit 397f9ba69f
1 changed files with 9 additions and 1 deletions
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10
src/gallium/drivers/panfrost/pan_context.c
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@ -453,7 +453,15 @@ panfrost_default_shader_backend(struct panfrost_context *ctx)
.unknown2_4 = MALI_NO_MSAA | 0x4e0,
};
/* unknown2_4 has 0x10 bit set on 32-bit T6XX */
/* unknown2_4 has 0x10 bit set on T6XX. We don't know why this is
* required (independent of 32-bit/64-bit descriptors), or why it's not
* used on later GPU revisions. Otherwise, all shader jobs fault on
* these earlier chips (perhaps this is a chicken bit of some kind).
* More investigation is needed. */
if (ctx->is_t6xx) {
shader.unknown2_4 |= 0x10;
}
struct pipe_stencil_state default_stencil = {
.enabled = 0,