diff --git a/arch/arm/src/stm32/stm32_sdio.c b/arch/arm/src/stm32/stm32_sdio.c
index 66a8d10773..db95c008e9 100644
--- a/arch/arm/src/stm32/stm32_sdio.c
+++ b/arch/arm/src/stm32/stm32_sdio.c
@@ -2721,7 +2721,17 @@ static int stm32_dmarecvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer,
 
   /* Then set up the SDIO data path */
 
-  dblocksize = stm32_log2(buflen) << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+#ifdef CONFIG_SDIO_BLOCKSETUP
+  if (priv->block_size != STM32_SDIO_USE_DEFAULT_BLOCKSIZE)
+    {
+      dblocksize = priv->block_size << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+    }
+  else
+#endif
+    {
+      dblocksize = stm32_log2(buflen) << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+    }
+
   stm32_dataconfig(SDIO_DTIMER_DATATIMEOUT, buflen, dblocksize | SDIO_DCTRL_DTDIR);
 
   /* Configure the RX DMA */
@@ -2790,7 +2800,17 @@ static int stm32_dmasendsetup(FAR struct sdio_dev_s *dev,
 
   /* Then set up the SDIO data path */
 
-  dblocksize = stm32_log2(buflen) << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+#ifdef CONFIG_SDIO_BLOCKSETUP
+  if (priv->block_size != STM32_SDIO_USE_DEFAULT_BLOCKSIZE)
+    {
+      dblocksize = priv->block_size << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+    }
+  else
+#endif
+    {
+      dblocksize = stm32_log2(buflen) << SDIO_DCTRL_DBLOCKSIZE_SHIFT;
+    }
+
   stm32_dataconfig(SDIO_DTIMER_DATATIMEOUT, buflen, dblocksize);
 
   /* Configure the TX DMA */
diff --git a/configs/photon/include/board.h b/configs/photon/include/board.h
index 96115ca57f..119c90a322 100644
--- a/configs/photon/include/board.h
+++ b/configs/photon/include/board.h
@@ -237,6 +237,17 @@
 #  define SDIO_SDXFR_CLKDIV     (2 << SDIO_CLKCR_CLKDIV_SHIFT)
 #endif
 
+/* DMA Channl/Stream Selections *****************************************************/
+/* Stream selections are arbitrary for now but might become important in the future
+ * if we set aside more DMA channels/streams.
+ *
+ * SDIO DMA
+ *   DMAMAP_SDIO_1 = Channel 4, Stream 3
+ *   DMAMAP_SDIO_2 = Channel 4, Stream 6
+ */
+
+#define DMAMAP_SDIO DMAMAP_SDIO_1
+
 /************************************************************************************
  * Public Data
  ************************************************************************************/
diff --git a/configs/photon/wlan/defconfig b/configs/photon/wlan/defconfig
index 25480a5acb..d1cae5539d 100644
--- a/configs/photon/wlan/defconfig
+++ b/configs/photon/wlan/defconfig
@@ -16,7 +16,7 @@ CONFIG_HOST_LINUX=y
 #
 # Build Configuration
 #
-# CONFIG_APPS_DIR="../apps"
+CONFIG_APPS_DIR="../apps"
 CONFIG_BUILD_FLAT=y
 # CONFIG_BUILD_2PASS is not set
 
@@ -75,6 +75,7 @@ CONFIG_DEBUG_WIRELESS_INFO=y
 #
 # OS Function Debug Options
 #
+# CONFIG_DEBUG_DMA is not set
 # CONFIG_DEBUG_IRQ is not set
 
 #
@@ -449,7 +450,7 @@ CONFIG_STM32_HAVE_SPI3=y
 # CONFIG_STM32_CAN2 is not set
 # CONFIG_STM32_CRC is not set
 # CONFIG_STM32_DMA1 is not set
-# CONFIG_STM32_DMA2 is not set
+CONFIG_STM32_DMA2=y
 # CONFIG_STM32_DAC1 is not set
 # CONFIG_STM32_DAC2 is not set
 # CONFIG_STM32_I2C1 is not set
@@ -499,6 +500,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=y
 # CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG is not set
 # CONFIG_STM32_FORCEPOWER is not set
 # CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG is not set
+# CONFIG_STM32_DMACAPABLE is not set
 
 #
 # Timer Configuration
@@ -529,6 +531,7 @@ CONFIG_STM32_SERIALDRIVER=y
 CONFIG_STM32_USART1_SERIALDRIVER=y
 # CONFIG_STM32_USART1_1WIREDRIVER is not set
 # CONFIG_USART1_RS485 is not set
+# CONFIG_USART1_RXDMA is not set
 
 #
 # Serial Driver Configuration
@@ -541,6 +544,7 @@ CONFIG_STM32_USART1_SERIALDRIVER=y
 #
 # SDIO Configuration
 #
+CONFIG_STM32_SDIO_DMA=y
 CONFIG_STM32_SDIO_DMAPRIO=0x00010000
 # CONFIG_STM32_SDIO_WIDTH_D1_ONLY is not set
 # CONFIG_STM32_HAVE_RTC_COUNTER is not set
@@ -567,7 +571,7 @@ CONFIG_STM32_SDIO_DMAPRIO=0x00010000
 #
 # CONFIG_ARCH_NOINTC is not set
 # CONFIG_ARCH_VECNOTIRQ is not set
-# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_DMA=y
 CONFIG_ARCH_HAVE_IRQPRIO=y
 # CONFIG_ARCH_L2CACHE is not set
 # CONFIG_ARCH_HAVE_COHERENT_DCACHE is not set
@@ -853,7 +857,7 @@ CONFIG_MMCSD_NSLOTS=1
 # CONFIG_MMCSD_MMCSUPPORT is not set
 # CONFIG_MMCSD_HAVECARDDETECT is not set
 CONFIG_ARCH_HAVE_SDIO=y
-# CONFIG_SDIO_DMA is not set
+CONFIG_SDIO_DMA=y
 CONFIG_ARCH_HAVE_SDIOWAIT_WRCOMPLETE=y
 CONFIG_MMCSD_SDIO=y
 CONFIG_SDIO_PREFLIGHT=y
@@ -1280,6 +1284,10 @@ CONFIG_HAVE_CXXINITIALIZE=y
 # Application Configuration
 #
 
+#
+# NxWidgets/NxWM
+#
+
 #
 # Built-In Applications
 #
@@ -1514,10 +1522,6 @@ CONFIG_NSH_MAX_ROUNDTRIP=20
 # CONFIG_NSH_LOGIN is not set
 # CONFIG_NSH_CONSOLE_LOGIN is not set
 
-#
-# NxWidgets/NxWM
-#
-
 #
 # Platform-specific Support
 #
diff --git a/drivers/wireless/ieee80211/mmc_sdio.c b/drivers/wireless/ieee80211/mmc_sdio.c
index 39c4139160..1848c3f72f 100644
--- a/drivers/wireless/ieee80211/mmc_sdio.c
+++ b/drivers/wireless/ieee80211/mmc_sdio.c
@@ -78,6 +78,8 @@ int sdio_io_rw_direct(FAR struct sdio_dev_s *dev, bool write,
 
     /* Setup CMD52 argument */
 
+    arg.value = 0;
+
     if (write)
       {
         arg.cmd52.write_data       = inb;
@@ -135,6 +137,7 @@ int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
 
     /* Setup CMD53 argument */
 
+    arg.value = 0;
     arg.cmd53.register_address = address & 0x1ffff;
     arg.cmd53.op_code          = inc_addr;
     arg.cmd53.function_number  = function & 7;
@@ -169,13 +172,13 @@ int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
         sdio_sendcmdpoll(dev, SDIO_ACMD53, (uint32_t)arg.value);
         ret = SDIO_RECVR5(dev, SDIO_ACMD53, (uint32_t*)&resp);
 
-        SDIO_SENDSETUP(dev, buf, blocklen * nblocks);
+        SDIO_DMASENDSETUP(dev, buf, blocklen * nblocks);
         wkupevent = SDIO_EVENTWAIT(dev, SDIO_CMD53_TIMEOUT_MS);
       }
     else
       {
         // wlinfo("prep read %d\n", blocklen * nblocks);
-        SDIO_RECVSETUP(dev, buf, blocklen * nblocks);
+        SDIO_DMARECVSETUP(dev, buf, blocklen * nblocks);
         SDIO_SENDCMD(dev, SDIO_ACMD53, (uint32_t)arg.value);
 
         wkupevent = SDIO_EVENTWAIT(dev, SDIO_CMD53_TIMEOUT_MS);