[sw][matcha] Update a register to take frame width

Change-Id: I1935452e0f016447be88e392c0dde5a2c7a9ec7d
diff --git a/sw/device/lib/dif/dif_isp_wrapper.c b/sw/device/lib/dif/dif_isp_wrapper.c
index 3363d33..280b0a7 100644
--- a/sw/device/lib/dif/dif_isp_wrapper.c
+++ b/sw/device/lib/dif/dif_isp_wrapper.c
@@ -332,7 +332,7 @@
                       cb_base_ad_init2_addr);
   mmio_region_write32(isp_wrapper->base_addr, MI_MP_CR_BASE_AD_INIT2,
                       cr_base_ad_init2_addr);
-  mmio_region_write32(isp_wrapper->base_addr, MI_MP_Y_LLENGTH, 0x00000140);
+  mmio_region_write32(isp_wrapper->base_addr, MI_MP_Y_LLENGTH, frame_width);
   mmio_region_write32(isp_wrapper->base_addr, MI_OUTPUT_ALIGN_FORMAT,
                       0x00000401);
   mmio_region_write32(isp_wrapper->base_addr, MI_MP_OUTPUT_FIFO_SIZE, 0x00000000);