[PATCH] drm/i915/gvt: Handle GEN9_WM_CHICKEN3 with F_CMD_ACCESS for BXT.

[Colin Xu]

Recent patch introduce strict check on scanning cmd:
Commit 8d458ea0ec33 ("drm/i915/gvt: return error on cmd access")

On BXT, i915 applies WaClearHIZ_WM_CHICKEN3 which will program
the reg 0x5588 by LRI, so we should handle GEN9_WM_CHICKEN3 with
F_CMD_ACCESS, also add F_MODE_MASK since it's mode mask reg.

Signed-off-by: Colin Xu <colin.xu at intel.com>
---
 drivers/gpu/drm/i915/gvt/handlers.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index cf2a4020949d..e32a69fabda3 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -3205,6 +3205,8 @@ static int init_bxt_mmio_info(struct intel_gvt *gvt)
 	MMIO_D(GEN8_L3SQCREG1, D_BXT);
 
 	MMIO_DFH(GEN9_CTX_PREEMPT_REG, D_BXT, F_CMD_ACCESS, NULL, NULL);
+	MMIO_DFH(GEN9_WM_CHICKEN3, D_BXT,
+		 F_MODE_MASK | F_CMD_ACCESS, NULL, NULL);
 
 	return 0;
 }
-- 
2.18.0