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[19/22] drm/i915/icl: WaAllowUMDToModifyHalfSliceChicken2

Message ID 1524256446-28490-20-git-send-email-oscar.mateo@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

oscar.mateo@intel.com April 20, 2018, 8:34 p.m. UTC
Required to dinamically set 'Small PL Lossless Fix Enable'

Do Linux UMDs make use of this? This change has been security
reviewed and the whitelisting approved. Virtualization of other
OSes could certainly use it.

v2: For whatever reason, this ended up in KBL (??!!)
v3: Rebased on top of the WA refactoring
v4: Rebased on top of whitelist reg refactoring (Michel)

Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
---
 drivers/gpu/drm/i915/intel_workarounds.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index be49c12..ba2ba63 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -901,6 +901,9 @@  static void icl_whitelist_build(struct whitelist *w)
 {
 	/* WaSendPushConstantsFromMMIO:icl */
 	whitelist_reg(w, COMMON_SLICE_CHICKEN2);
+
+	/* WaAllowUMDToModifyHalfSliceChicken2:icl */
+	whitelist_reg(w, HALF_SLICE_CHICKEN2);
 }
 
 static struct whitelist *whitelist_build(struct intel_engine_cs *engine,