While testing kmscube with mesa master, it turns out that kmscube is not
working anymore. After bisecting, commit
5a7688fdecd76c7d9cd87f6f6c93eb32870a2146 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>
.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,