[Intel-gfx] [PATCH] drm/i915/ehl: Update MOCS table for EHL

[Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>]

From: Matt Roper <matthew.d.roper@intel.com>

These extra EHL entries were not behaving as expected without proper
flushing implemented in kernel.
https://cgit.freedesktop.org/drm-tip/commit/?id=a679f58d051025db6fa86226c4d35650b75e990f
patch introduces proper flushing to make it work as expected.

Hence adding those EHL entries back.

Cc: Francisco Jerez <francisco.jerez.plata@intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Fixes: 046091758b50 ("Revert "drm/i915/ehl: Update MOCS table for EHL"")
Link: https://patchwork.freedesktop.org/patch/msgid/20191112224757.25116-1-matthew.d.roper@intel.com
---
 drivers/gpu/drm/i915/gt/intel_mocs.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
index 17848807f111..7d9ef0210805 100644
--- a/drivers/gpu/drm/i915/gt/intel_mocs.c
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -194,6 +194,14 @@ static const struct drm_i915_mocs_entry broxton_mocs_table[] = {
 	MOCS_ENTRY(15, \
 		   LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \
 		   L3_3_WB), \
+	/* Bypass LLC - Uncached (EHL+) */ \
+	MOCS_ENTRY(16, \
+		   LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \
+		   L3_1_UC), \
+	/* Bypass LLC - L3 (Read-Only) (EHL+) */ \
+	MOCS_ENTRY(17, \
+		   LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \
+		   L3_3_WB), \
 	/* Self-Snoop - L3 + LLC */ \
 	MOCS_ENTRY(18, \
 		   LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SSE(3), \
-- 
2.31.1

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