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Subject[PATCH 5.4 29/78] drm/i915: Add Wa_1407352427:icl,ehl
Date
From: Matt Roper <matthew.d.roper@intel.com>

commit 25b79ad51bf04a8aa67b5bccd631fc05f963b8e0 upstream.

The workaround database now indicates we need to disable psdunit clock
gating as well.

v3:
- Rebase on top of other workarounds that have landed.
- Restrict cc:stable tag to 5.2+ since that's when ICL was first
officially supported.

Bspec: 32354
Bspec: 33450
Bspec: 33451
Suggested-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: stable@vger.kernel.org # v5.2+
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231190713.1549533-1-matthew.d.roper@intel.com
(cherry picked from commit 1cd21a7c5679015352e8a6f46813aced51d71bb8)
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 | 3 +++
2 files changed, 7 insertions(+)

--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4053,6 +4053,10 @@ enum {
#define HSUNIT_CLKGATE_DIS REG_BIT(8)
#define VSUNIT_CLKGATE_DIS REG_BIT(3)

+#define UNSLICE_UNIT_LEVEL_CLKGATE2 _MMIO(0x94e4)
+#define VSUNIT_CLKGATE_DIS_TGL REG_BIT(19)
+#define PSDUNIT_CLKGATE_DIS REG_BIT(5)
+
#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
@@ -9202,6 +9202,9 @@ static void icl_init_clock_gating(struct
intel_uncore_rmw(&dev_priv->uncore, UNSLICE_UNIT_LEVEL_CLKGATE,
0, VSUNIT_CLKGATE_DIS | HSUNIT_CLKGATE_DIS);

+ /* Wa_1407352427:icl,ehl */
+ intel_uncore_rmw(&dev_priv->uncore, UNSLICE_UNIT_LEVEL_CLKGATE2,
+ 0, PSDUNIT_CLKGATE_DIS);
}

static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)

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