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freedreno/a6xx: Implement reg stomper support

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Useful to track down issues related to uninitialized regs.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30304>
This commit is contained in:
Rob Clark 2024-07-22 07:22:18 -07:00 • committed by Marge Bot
parent 1242f3ed3a
commit 1a3f041cd8
3 changed files with 19 additions and 0 deletions
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17
src/gallium/drivers/freedreno/a6xx/fd6_emit.cc
View file

@ -37,6 +37,7 @@
#include "freedreno_query_hw.h"
#include "freedreno_resource.h"
#include "freedreno_state.h"
#include "freedreno_stompable_regs.h"
#include "freedreno_tracepoints.h"
#include "fd6_blend.h"
@ -802,6 +803,17 @@ fd6_emit_ccu_cntl(struct fd_ringbuffer *ring, struct fd_screen *screen, bool gme
template void fd6_emit_cs_state<A6XX>(struct fd_context *ctx, struct fd_ringbuffer *ring, struct fd6_compute_state *cs);
template void fd6_emit_cs_state<A7XX>(struct fd_context *ctx, struct fd_ringbuffer *ring, struct fd6_compute_state *cs);
template <chip CHIP>
static void
fd6_emit_stomp(struct fd_ringbuffer *ring, const uint16_t *regs, size_t count)
{
for (size_t i = 0; i < count; i++) {
if (fd_reg_stomp_allowed(CHIP, regs[i])) {
WRITE(regs[i], 0xffffffff);
}
}
}
/* emit setup at begin of new cmdstream buffer (don't rely on previous
* state, there could have been a context switch between ioctls):
*/
@ -815,6 +827,11 @@ fd6_emit_restore(struct fd_batch *batch, struct fd_ringbuffer *ring)
trace_start_state_restore(&batch->trace, ring);
}
if (FD_DBG(STOMP)) {
fd6_emit_stomp<CHIP>(ring, &RP_BLIT_REGS<CHIP>[0], ARRAY_SIZE(RP_BLIT_REGS<CHIP>));
fd6_emit_stomp<CHIP>(ring, &CMD_REGS<CHIP>[0], ARRAY_SIZE(CMD_REGS<CHIP>));
}
OUT_PKT7(ring, CP_SET_MODE, 1);
OUT_RING(ring, 0);

1
src/gallium/drivers/freedreno/freedreno_screen.c
View file

@ -98,6 +98,7 @@ static const struct debug_named_value fd_debug_options[] = {
{"nofp16", FD_DBG_NOFP16, "Disable mediump precision lowering"},
{"nohw", FD_DBG_NOHW, "Disable submitting commands to the HW"},
{"nosbin", FD_DBG_NOSBIN, "Execute GMEM bins in raster order instead of 'S' pattern"},
{"stomp", FD_DBG_STOMP, "Enable register stomper"},
DEBUG_NAMED_VALUE_END
};
/* clang-format on */

1
src/gallium/drivers/freedreno/freedreno_util.h
View file

@ -102,6 +102,7 @@ enum fd_debug_flag {
FD_DBG_NOFP16 = BITFIELD_BIT(27),
FD_DBG_NOHW = BITFIELD_BIT(28),
FD_DBG_NOSBIN = BITFIELD_BIT(29),
FD_DBG_STOMP = BITFIELD_BIT(30),
};
/* clang-format on */