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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2017-10-09 13:03:30 +0300 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2017-10-10 13:09:34 +0300 |
| commit | 4046217954d4e79d57d34c56ce42dec4f87e2ce9 (patch) | |
| tree | c20b4b7d0a6579e2f9fcd7a46b0a7b29f44fedf0 /drivers/gpu/drm/etnaviv/etnaviv_gpu.c | |
| parent | 13cde9f4c62accdb35f769501ae951ecd75cccc9 (diff) | |
| download | linux-4046217954d4e79d57d34c56ce42dec4f87e2ce9.tar.xz | |
drm/etnaviv: reduce reset delay
After reset assertion, we only have to wait for the reset signals to
propagate through the GPU before deasserting the reset again. A few
hundred clock cycles should be more than enough. Replace the msleep(1),
which can actually take about 30 ms on i.MX6Q in some configurations,
with an usleep_range of a few microseconds. If the delay was too short,
the FE would not be idle afterwards, and the reset would be retried.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 3e0fcc1fafb5..95ee479c95cb 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -456,7 +456,7 @@ static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); /* wait for reset. */ - msleep(1); + usleep_range(10, 20); /* reset soft reset bit. */ control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET; |