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authorRussell King <rmk+kernel@arm.linux.org.uk>2016-01-21 18:20:45 +0300
committerLucas Stach <l.stach@pengutronix.de>2016-07-05 17:26:36 +0300
commit7d0c6e711549cb623dc98a68bf89e66208263636 (patch)
tree6aa1f6e0c234458d903386cd8d1615b5793cc35f /drivers/gpu/drm/etnaviv
parent33688abb2802ff3a230bd2441f765477b94cc89e (diff)
downloadlinux-7d0c6e711549cb623dc98a68bf89e66208263636.tar.xz
drm/etnaviv: enable GPU module level clock gating support
Enable GPU module level hardware clock gating, using the conditions found in the galcore v5 driver. v2 lst: Split out clock gating enable into separate function, as there might be more conditions needed for new hardware. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm/etnaviv')
-rw-r--r--drivers/gpu/drm/etnaviv/etnaviv_gpu.c44
-rw-r--r--drivers/gpu/drm/etnaviv/state_hi.xml.h7
2 files changed, 51 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index ff6aa5dfb2d7..9b72b6a9c29c 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -487,6 +487,47 @@ static int etnaviv_hw_reset(struct etnaviv_gpu *gpu)
return 0;
}
+static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
+{
+ u32 pmc, ppc;
+
+ /* enable clock gating */
+ ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
+ ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
+
+ /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */
+ if (gpu->identity.revision == 0x4301 ||
+ gpu->identity.revision == 0x4302)
+ ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING;
+
+ gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc);
+
+ pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS);
+
+ /* Disable PA clock gating for GC400+ except for GC420 */
+ if (gpu->identity.model >= chipModel_GC400 &&
+ gpu->identity.model != chipModel_GC420)
+ pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA;
+
+ /*
+ * Disable PE clock gating on revs < 5.0.0.0 when HZ is
+ * present without a bug fix.
+ */
+ if (gpu->identity.revision < 0x5000 &&
+ gpu->identity.minor_features0 & chipMinorFeatures0_HZ &&
+ !(gpu->identity.minor_features1 &
+ chipMinorFeatures1_DISABLE_PE_GATING))
+ pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE;
+
+ if (gpu->identity.revision < 0x5422)
+ pmc |= BIT(15); /* Unknown bit */
+
+ pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
+ pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;
+
+ gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc);
+}
+
static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
{
u16 prefetch;
@@ -506,6 +547,9 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug);
}
+ /* enable module-level clock gating */
+ etnaviv_gpu_enable_mlcg(gpu);
+
/*
* Update GPU AXI cache atttribute to "cacheable, no allocate".
* This is necessary to prevent the iMX6 SoC locking up.
diff --git a/drivers/gpu/drm/etnaviv/state_hi.xml.h b/drivers/gpu/drm/etnaviv/state_hi.xml.h
index 6a7de5f1454a..807a3d9e0dd5 100644
--- a/drivers/gpu/drm/etnaviv/state_hi.xml.h
+++ b/drivers/gpu/drm/etnaviv/state_hi.xml.h
@@ -218,6 +218,13 @@ Copyright (C) 2015
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_FE 0x00000001
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_DE 0x00000002
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE 0x00000004
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SH 0x00000008
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA 0x00000010
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SE 0x00000020
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA 0x00000040
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX 0x00000080
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ 0x00010000
+#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ 0x00020000
#define VIVS_PM_MODULE_STATUS 0x00000108
#define VIVS_PM_MODULE_STATUS_MODULE_CLOCK_GATED_FE 0x00000001