Everytime etnaviv_gpu_update_clock(..) gets call it overwrittes
the the complete VIVS_HI_CLOCK_CONTROL register. Instead read
the register, change scaling value and write the new value.
Signed-off-by: Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
---
drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index cfe6c76d077e..10a6485a2401 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -421,8 +421,9 @@ static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu)
gpu->base_rate_shader >> gpu->freq_scale);
} else {
unsigned int fscale = 1 << (6 - gpu->freq_scale);
- u32 clock = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale);
+ u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
+ clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale);
etnaviv_gpu_load_clock(gpu, clock);
}
}
--
2.13.5
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