Mesa (master): ac/gpu_info: if clock crystal frequency is 0, print an error and set 1

[Marek Olšák]

Module: Mesa
Branch: master
Commit: 3d1a576fa607b5df05cbfe286ef9821ba387344d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3d1a576fa607b5df05cbfe286ef9821ba387344d

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Mon Jul 10 16:01:28 2017 +0200

ac/gpu_info: if clock crystal frequency is 0, print an error and set 1

During bring-up, this is often 0. Prevent automatic disablement of
ARB_timer_query and demotion of the OpenGL version to 3.2 by setting
a non-zero frequency. Print an error message instead.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

---

 src/amd/common/ac_gpu_info.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/amd/common/ac_gpu_info.c b/src/amd/common/ac_gpu_info.c
index 3f39a089ec..ced7183cf6 100644
--- a/src/amd/common/ac_gpu_info.c
+++ b/src/amd/common/ac_gpu_info.c
@@ -260,6 +260,10 @@ bool ac_query_gpu_info(int fd, amdgpu_device_handle dev,
 	info->has_userptr = true;
 	info->num_render_backends = amdinfo->rb_pipes;
 	info->clock_crystal_freq = amdinfo->gpu_counter_freq;
+	if (!info->clock_crystal_freq) {
+		fprintf(stderr, "amdgpu: clock crystal frequency is 0, timestamps will be wrong\n");
+		info->clock_crystal_freq = 1;
+	}
 	info->tcc_cache_line_size = 64; /* TC L2 line size on GCN */
 	if (info->chip_class == GFX9) {
 		info->num_tile_pipes = 1 << G_0098F8_NUM_PIPES(amdinfo->gb_addr_cfg);