media: stm32: dcmipp: reverse SWAPCYCLE behavior on MP13

The STM32MP13 dcmipp does not embed a SWAPYUV bit to exchange the
Y and V component (compared to other dcmipp implementation) hence
in case of parallel input the SWAPCYCLE behavior should also take
care of this point to avoid getting swapped Y and U component when
capturing from the DUMP pipe.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Change-Id: Ia531b67ec2387208bb0381db4e1691242f7bb6a2
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/linux-stm32/+/461924
Reviewed-by: Hugues FRUCHET <hugues.fruchet@st.com>
Tested-by: Alain VOLMAT <alain.volmat@st.com>
Reviewed-by: Alain VOLMAT <alain.volmat@st.com>
Reviewed-by: Philippe CORNU <philippe.cornu@foss.st.com>
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
Domain-Review: Philippe CORNU <philippe.cornu@foss.st.com>

Author: Alain Volmat

drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-input.c

@@ -394,8 +394,22 @@ static int dcmipp_inp_configure_parallel(struct dcmipp_inp_device *inp,
 	val |= vpix->prcr_format << DCMIPP_PRCR_FORMAT_SHIFT;
 
 	/* swap cycles */
-	if (vpix->prcr_swapcycles)
-		val |= DCMIPP_PRCR_SWAPCYCLES;
+	/*
+	 * PPCR SWAPYUV is not available on STM32MP13 so behavior regarding
+	 * to SWAPCYCLES should be reversed compared to other platforms for
+	 * YUV422 format
+	 */
+	if (of_device_is_compatible(inp->dev->of_node, "st,stm32mp13-dcmipp") &&
+	    (src_fmt->code == MEDIA_BUS_FMT_YUYV8_2X8 ||
+	     src_fmt->code == MEDIA_BUS_FMT_YVYU8_2X8 ||
+	     src_fmt->code == MEDIA_BUS_FMT_UYVY8_2X8 ||
+	     src_fmt->code == MEDIA_BUS_FMT_VYUY8_2X8)) {
+		if (!vpix->prcr_swapcycles)
+			val |= DCMIPP_PRCR_SWAPCYCLES;
+	} else {
+		if (vpix->prcr_swapcycles)
+			val |= DCMIPP_PRCR_SWAPCYCLES;
+	}
 
 	reg_write(inp, DCMIPP_PRCR, val);