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drm/etnaviv: need to disable clock gating when doing profiling 

As done by Vivante kernel driver.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Christian Gmeiner 2017-09-24 15:15:39 +02:00 committed by Lucas Stach
parent 49168ee91d
commit 2c8b0c5a99
1 changed files with 13 additions and 0 deletions
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13
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -1346,6 +1346,13 @@ static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu,
static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu,
struct etnaviv_event *event)
{
u32 val;
/* disable clock gating */
val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val);
sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE);
}
@ -1354,6 +1361,7 @@ static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu,
{
const struct etnaviv_cmdbuf *cmdbuf = event->cmdbuf;
unsigned int i;
u32 val;
sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST);
@ -1362,6 +1370,11 @@ static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu,
*pmr->bo_vma = pmr->sequence;
}
/* enable clock gating */
val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val);
}