media: atomisp: add -dDEBUG when building this driver

This driver still has lots of issues. Let's enable debug
there inconditionally, as we need more information in order
to address the pending issues.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/Makefile

@@ -5,6 +5,9 @@ obj-$(CONFIG_INTEL_ATOMISP) += i2c/
 obj-$(CONFIG_INTEL_ATOMISP) += platform/
 obj-$(CONFIG_VIDEO_ATOMISP) += atomisp.o
 
+# While on staging, keep debug enabled
+DEFINES += -DDEBUG
+
 atomisp = $(srctree)/drivers/staging/media/atomisp/
 
 # SPDX-License-Identifier: GPL-2.0

drivers/staging/media/atomisp/pci/atomisp_fops.c

@@ -785,6 +785,7 @@ static int atomisp_open(struct file *file)
 	asd->subdev.devnode = vdev;
 	/* Deferred firmware loading case. */
 	if (isp->css_env.isp_css_fw.bytes == 0) {
+		dev_err(isp->dev, "Deferred firmware load.\n");
 		isp->firmware = atomisp_load_firmware(isp);
 		if (!isp->firmware) {
 			dev_err(isp->dev, "Failed to load ISP firmware.\n");