msm: kgsl: Leave the MMU clocks on with the rest of the GPU

It is no longer power efficient to independently enable and disable
the MMU clocks. We can safely enable and disable them with the rest
of the GPU clocks and take back the infrastructure needed to handle
the clocks.

CRs-Fixed: 1009124
Change-Id: Ic0dedbadc48095eada9c5fce6004475a2cb0f0a9
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/msm/kgsl_pwrctrl.c b/drivers/gpu/msm/kgsl_pwrctrl.c
index da8c8585d31e..2b9eef8b6351 100644
--- a/drivers/gpu/msm/kgsl_pwrctrl.c
+++ b/drivers/gpu/msm/kgsl_pwrctrl.c
@@ -1381,6 +1381,9 @@ static void kgsl_pwrctrl_clk(struct kgsl_device *device, int state,
 				_isense_clk_set_rate(pwr,
 					pwr->num_pwrlevels - 1);
 			}
+
+			/* Turn off the IOMMU clocks */
+			kgsl_mmu_disable_clk(&device->mmu);
 		} else if (requested_state == KGSL_STATE_SLEEP) {
 			/* High latency clock maintenance. */
 			for (i = KGSL_MAX_CLKS - 1; i > 0; i--)
@@ -1428,7 +1431,11 @@ static void kgsl_pwrctrl_clk(struct kgsl_device *device, int state,
 					pwr->gpu_bimc_interface_enabled = 1;
 				}
 			}
+
+			/* Turn on the IOMMU clocks */
+			kgsl_mmu_enable_clk(&device->mmu);
 		}
+
 	}
 }