msm: driver: configure video context bank for best fit

With best fit configuration, the probability of getting
a mapping for video buffer increases even when the system
is fragmented.

Change-Id: I8689447ce1341fd1189b543eb9fb6a2e03edcc94
Signed-off-by: Vikash Garodia <[email protected]>

driver/vidc/src/msm_vidc_dt.c

@@ -4,6 +4,7 @@
  */
 
 #include <linux/iommu.h>
+#include <linux/dma-iommu.h>
 #include <linux/of.h>
 #include <linux/sort.h>
 
@@ -799,6 +800,12 @@ static int msm_vidc_setup_context_bank(struct msm_vidc_core *core,
 
 	cb->domain = iommu_get_domain_for_dev(cb->dev);
 
+	/*
+	 * When memory is fragmented, below configuration increases the
+	 * possibility to get a mapping for buffer in the configured CB.
+	 */
+	iommu_dma_enable_best_fit_algo(cb->dev);
+
 	/*
 	 * configure device segment size and segment boundary to ensure
 	 * iommu mapping returns one mapping (which is required for partial