Commit 1cd21a7c authored Dec 31, 2019 by Matt Roper

drm/i915: Add Wa_1407352427:icl,ehl



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

parent 32f408ac

drivers/gpu/drm/i915/i915_reg.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -4183,6 +4183,7 @@ enum {

		#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)

drivers/gpu/drm/i915/intel_pm.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -6607,6 +6607,9 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
		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 tgl_init_clock_gating(struct drm_i915_private *dev_priv)

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