From: Philipp Zabel Date: Mon, 9 Oct 2017 12:03:31 +0200 Subject: drm/etnaviv: remove unnecessary clock stabilization delay Git-commit: 8272170f7da34e2554bed10ab76582094ea6816d Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 There is no reason to wait for clock stabilization here, as the clock framework guarantees that PLL clock sources are stable before clk_enable returns. Signed-off-by: Philipp Zabel Signed-off-by: Lucas Stach Acked-by: Petr Tesarik --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 3 --- 1 file changed, 3 deletions(-) --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -444,9 +444,6 @@ static int etnaviv_hw_reset(struct etnav control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); etnaviv_gpu_load_clock(gpu, control); - /* Wait for stable clock. Vivante's code waited for 1ms */ - usleep_range(1000, 10000); - /* isolate the GPU. */ control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);