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ac: enable both RBs on Kaveri 

This can result in 2x increase in performance on non-harvested Kaveris.

v2: don't do it on radeon

Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2018-05-01 12:48:05 -04:00
parent 597b9e8810
commit ce954ac6f3
1 changed files with 13 additions and 2 deletions
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15
src/amd/common/ac_gpu_info.c
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@ -316,7 +316,12 @@ bool ac_query_gpu_info(int fd, amdgpu_device_handle dev,
/* TODO: Enable this once the kernel handles it efficiently. */
info->has_local_buffers = info->drm_minor >= 20 &&
!info->has_dedicated_vram;
info->num_render_backends = amdinfo->rb_pipes;
/* The value returned by the kernel driver was wrong. */
if (info->family == CHIP_KAVERI)
info->num_render_backends = 2;
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");
@ -627,8 +632,7 @@ ac_get_raster_config(struct radeon_info *info,
raster_config_1 = 0x00000000;
break;
case CHIP_KAVERI:
/* KV should be 0x00000002, but that causes problems with radeon */
raster_config = 0x00000000; /* 0x00000002 */
raster_config = 0x00000002;
raster_config_1 = 0x00000000;
break;
case CHIP_KABINI:
@ -644,6 +648,13 @@ ac_get_raster_config(struct radeon_info *info,
raster_config_1 = 0x00000000;
break;
}
/* drm/radeon on Kaveri is buggy, so disable 1 RB to work around it.
* This decreases performance by up to 50% when the RB is the bottleneck.
*/
if (info->family == CHIP_KAVERI && info->drm_major == 2)
raster_config = 0x00000000;
*raster_config_p = raster_config;
*raster_config_1_p = raster_config_1;
}