media: staging: media: ipu3-imgu: Request specific firmware binary

Primarily request a specific revision of the IPU3 firmware that the driver
is known to work with,
irci_irci_ecr-master_20161208_0213_20170112_1500.bin. Some distros only
ship this while others provide a symlink called ipu3-fw.bin, which the
driver only requested previously.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/ipu3/ipu3-css-fw.c

@@ -117,7 +117,9 @@ int imgu_css_fw_init(struct imgu_css *css)
 	unsigned int i, j, binary_nr;
 	int r;
 
-	r = request_firmware(&css->fw, IMGU_FW_NAME, css->dev);
+	r = request_firmware(&css->fw, IMGU_FW_NAME_20161208, css->dev);
+	if (r == -ENOENT)
+		r = request_firmware(&css->fw, IMGU_FW_NAME, css->dev);
 	if (r)
 		return r;
 

drivers/staging/media/ipu3/ipu3-css-fw.h

@@ -6,7 +6,9 @@
 
 /******************* Firmware file definitions *******************/
 
-#define IMGU_FW_NAME			"intel/ipu3-fw.bin"
+#define IMGU_FW_NAME		"intel/ipu3-fw.bin"
+#define IMGU_FW_NAME_20161208	\
+	"intel/irci_irci_ecr-master_20161208_0213_20170112_1500.bin"
 
 typedef u32 imgu_fw_ptr;