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Subject[PATCH 5.4 23/78] drm/i915: Add Wa_1408615072 and Wa_1407596294 to icl,ehl
Date
From: Matt Roper <matthew.d.roper@intel.com>

commit a7f3ad37f80d0d5eec9dad156964c0dac800a80e upstream.

Workaround database indicates we should disable clock gating of both the
vsunit and hsunit.

Bspec: 33450
Bspec: 33451
Cc: stable@kernel.vger.org
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224012026.3157766-3-matthew.d.roper@intel.com
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit b9cf9dac3dac4c1d2a47d34f30ec53c0423cecf8)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/i915/i915_reg.h | 4 +++-
drivers/gpu/drm/i915/intel_pm.c | 8 ++++++++
2 files changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4049,7 +4049,9 @@ enum {
#define GWUNIT_CLKGATE_DIS (1 << 16)

#define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434)
-#define VFUNIT_CLKGATE_DIS (1 << 20)
+#define VFUNIT_CLKGATE_DIS REG_BIT(20)
+#define HSUNIT_CLKGATE_DIS REG_BIT(8)
+#define VSUNIT_CLKGATE_DIS REG_BIT(3)

#define INF_UNIT_LEVEL_CLKGATE _MMIO(0x9560)
#define CGPSF_CLKGATE_DIS (1 << 3)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -9194,6 +9194,14 @@ static void icl_init_clock_gating(struct
/* WaEnable32PlaneMode:icl */
I915_WRITE(GEN9_CSFE_CHICKEN1_RCS,
_MASKED_BIT_ENABLE(GEN11_ENABLE_32_PLANE_MODE));
+
+ /*
+ * Wa_1408615072:icl,ehl (vsunit)
+ * Wa_1407596294:icl,ehl (hsunit)
+ */
+ intel_uncore_rmw(&dev_priv->uncore, UNSLICE_UNIT_LEVEL_CLKGATE,
+ 0, VSUNIT_CLKGATE_DIS | HSUNIT_CLKGATE_DIS);
+
}

static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)

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