[PATCH] drm/etnaviv: disable pulse eater on cores with 3D pipe and revision > 0x5420

[Lucas Stach]

The downstream driver switched from only disabling internal DFS on those
cores to clearing bit 16 and setting bit 17 in commit "MGS-3448: gpu-viv:
fix 6.2.4 remaning issues". This, as far as is known, completely disables
the pulse eater.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index a1e84deba6c0..a2b3785e49b3 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -747,9 +747,10 @@ static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu)
 	if ((gpu->identity.revision > 0x5420) &&
 	    (gpu->identity.features & chipFeatures_PIPE_3D))
 	{
-		/* Performance fix: disable internal DFS */
+		/* Performance fix: disable internal DFS and pulse-eater */
 		pulse_eater = gpu_read_power(gpu, VIVS_PM_PULSE_EATER);
-		pulse_eater |= BIT(18);
+		pulse_eater &= ~BIT(16);
+		pulse_eater |= BIT(18) | BIT(17);
 	}
 
 	gpu_write_power(gpu, VIVS_PM_PULSE_EATER, pulse_eater);
-- 
2.39.5