drm/xe: Label RING_CONTEXT_CONTROL as masked

RING_CONTEXT_CONTROL is a masked register.

v2: Also clean up setting register value (Lucas)
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404161256.3852502-1-ashutosh.dixit@intel.com
(cherry picked from commit dc30c6e7)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/regs/xe_engine_regs.h

@@ -125,7 +125,7 @@
 #define RING_EXECLIST_STATUS_LO(base)		XE_REG((base) + 0x234)
 #define RING_EXECLIST_STATUS_HI(base)		XE_REG((base) + 0x234 + 4)
 
-#define RING_CONTEXT_CONTROL(base)		XE_REG((base) + 0x244)
+#define RING_CONTEXT_CONTROL(base)		XE_REG((base) + 0x244, XE_REG_OPTION_MASKED)
 #define	  CTX_CTRL_INHIBIT_SYN_CTX_SWITCH	REG_BIT(3)
 #define	  CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT	REG_BIT(0)
 

drivers/gpu/drm/xe/xe_lrc.c

@@ -525,9 +525,8 @@ static const u8 *reg_offsets(struct xe_device *xe, enum xe_engine_class class)
 
 static void set_context_control(u32 *regs, struct xe_hw_engine *hwe)
 {
-	regs[CTX_CONTEXT_CONTROL] = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH) |
-				    _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT) |
-				    CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT;
+	regs[CTX_CONTEXT_CONTROL] = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
+						       CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
 
 	/* TODO: Timestamp */
 }