Mesa (master): radv: Skip 0-sized index buffers only when necessary

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Module: Mesa
Branch: master
Commit: 2fb71504f002f39247c0c8157fc14102b9eee1b0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2fb71504f002f39247c0c8157fc14102b9eee1b0

Author: Tony Wasserka <tony.wasserka at gmx.de>
Date:   Thu Mar  4 12:10:58 2021 +0100

radv: Skip 0-sized index buffers only when necessary

This workaround is only needed on Navi10 and Navi14.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9429>

---

 src/amd/vulkan/radv_cmd_buffer.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index debb89c0f91..5122c0642fc 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -5426,10 +5426,9 @@ radv_emit_draw_packets(struct radv_cmd_buffer *cmd_buffer,
  			uint32_t remaining_indexes = cmd_buffer->state.max_index_count;
  			remaining_indexes = MAX2(remaining_indexes, info->first_index) - info->first_index;
 
-			/* Skip draw calls with 0-sized index buffers. They
-			 * cause a hang on some chips, like Navi10-14.
-			 */
-			if (!remaining_indexes)
+			/* Skip draw calls with 0-sized index buffers if the GPU can't handle them */
+			if (!remaining_indexes &&
+			    cmd_buffer->device->physical_device->rad_info.has_zero_index_buffer_bug)
 				return;
 
 			index_va = state->index_va;