media: atomisp: add a way for the driver to know the chipset version

The atomisp supports two different chipsets: ISP2400 and ISP2401.
Right now, this is controlled by ugly #defines inside the driver.

Add a global bolean to identify the type of hardware. While this
is hacky, it would be a quick way to start removing the ugly
ifdefs.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/include/linux/atomisp.h

@@ -69,6 +69,9 @@
 #define V4L2_MBUS_FMT_CUSTOM_M10MO_RAW	0x800b
 #endif
 
+/* FIXME: for now, let's use a boolean to identify the type of atomisp chipset */
+extern bool atomisp_hw_is_isp2401;
+
 /* Configuration used by Bayer noise reduction and YCC noise reduction */
 struct atomisp_nr_config {
 	/* [gain] Strength of noise reduction for Bayer NR (Used by Bayer NR) */

drivers/staging/media/atomisp/pci/atomisp2/atomisp_v4l2.c

@@ -105,6 +105,21 @@ int pad_h = 16;
 module_param(pad_h, int, 0644);
 MODULE_PARM_DESC(pad_h, "extra data for ISP processing");
 
+/*
+ * FIXME: this is a hack to make easier to support ISP2401 variant.
+ * As a given system will either be ISP2401 or not, we can just use
+ * a boolean, in order to replace existing #ifdef ISP2401 everywhere.
+ *
+ * Once this driver gets into a better shape, however, the best would
+ * be to replace this to something stored inside atomisp allocated
+ * structures.
+ */
+bool atomisp_hw_is_isp2401;
+
+/* Types of atomisp hardware */
+#define HW_IS_ISP2400 0
+#define HW_IS_ISP2401 1
+
 struct device *atomisp_dev;
 
 void __iomem *atomisp_io_base;
@@ -1169,6 +1184,11 @@ static int atomisp_pci_probe(struct pci_dev *dev,
 	/* Pointer to struct device. */
 	atomisp_dev = &dev->dev;
 
+	if (id->driver_data == HW_IS_ISP2401)
+		atomisp_hw_is_isp2401 = true;
+	else
+		atomisp_hw_is_isp2401 = false;
+
 	pdata = atomisp_get_platform_data();
 	if (!pdata)
 		dev_warn(&dev->dev, "no platform data available\n");
@@ -1514,18 +1534,22 @@ static void atomisp_pci_remove(struct pci_dev *dev)
 }
 
 static const struct pci_device_id atomisp_pci_tbl[] = {
+/*
+ * FIXME:
+ * remove the ifs once we get rid of the ifs on other parts of the driver
+ */
 #if defined(ISP2400) || defined(ISP2400B0)
 	/* Merrifield */
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1178)},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1179)},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x117a)},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1178), .driver_data = HW_IS_ISP2400},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1179), .driver_data = HW_IS_ISP2400},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x117a), .driver_data = HW_IS_ISP2400},
 	/* Baytrail */
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38)},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38), .driver_data = HW_IS_ISP2400},
 #elif defined(ISP2401)
 	/* Anniedale (Merrifield+ / Moorefield) */
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1478)},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1478), .driver_data = HW_IS_ISP2401},
 	/* Cherrytrail */
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8)},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8), .driver_data = HW_IS_ISP2401},
 #endif
 	{0,}
 };