[PATCH v3 1/5] media: atomisp: Refactor PMIC detection to a separate function

[PATCH v3 1/5] media: atomisp: Refactor PMIC detection to a separate function

[Andy Shevchenko]

Refactor PMIC detection to a separate function. In the future
we may move this code somewhere else where it's more suitable.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 .../media/atomisp/pci/atomisp_gmin_platform.c | 59 +++++++++++--------
 1 file changed, 36 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index 3856e164e478..7f846a61858d 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -478,7 +478,38 @@ static int atomisp_get_acpi_power(struct device *dev, acpi_handle handle)
 	return clock_num;
 }
 
-static struct i2c_client *power;
+static u8 gmin_get_pmic_id_and_addr(struct device *dev)
+{
+	struct i2c_client *power;
+	static u8 pmic_i2c_addr;
+
+	if (pmic_id)
+		return pmic_i2c_addr;
+
+	if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power))
+		pmic_id = PMIC_TI;
+	else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power))
+		pmic_id = PMIC_AXP;
+	else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power))
+		pmic_id = PMIC_CRYSTALCOVE;
+	else
+		pmic_id = PMIC_REGULATOR;
+
+	pmic_i2c_addr = power ? power->addr : 0;
+	return pmic_i2c_addr;
+}
+
+static int gmin_detect_pmic(struct v4l2_subdev *subdev)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	struct device *dev = &client->dev;
+	u8 pmic_i2c_addr;
+
+	pmic_i2c_addr = gmin_get_pmic_id_and_addr(dev);
+	dev_info(dev, "gmin: power management provided via %s (i2c addr 0x%02x)\n",
+		 pmic_name[pmic_id], pmic_i2c_addr);
+	return pmic_i2c_addr;
+}
 
 static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 {
@@ -593,27 +624,6 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 	 * in order to set clocks and do power management.
 	 */
 
-	if (!pmic_id) {
-		if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power))
-			pmic_id = PMIC_TI;
-		else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power))
-			pmic_id = PMIC_AXP;
-		else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power))
-			pmic_id = PMIC_CRYSTALCOVE;
-		else
-			pmic_id = PMIC_REGULATOR;
-	}
-
-	if (power) {
-		gs->pwm_i2c_addr = power->addr;
-		dev_info(dev,
-			 "gmin: power management provided via %s (i2c addr 0x%02x)\n",
-			 pmic_name[pmic_id], power->addr);
-	} else {
-		dev_info(dev, "gmin: power management provided via %s\n",
-			 pmic_name[pmic_id]);
-	}
-
 	/*
 	 * According with :
 	 *   https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md
@@ -1066,10 +1076,13 @@ struct camera_sensor_platform_data *gmin_camera_platform_data(
     enum atomisp_input_format csi_format,
     enum atomisp_bayer_order csi_bayer)
 {
-	struct gmin_subdev *gs = gmin_subdev_add(subdev);
+	struct gmin_subdev *gs;
+	u8 pmic_i2c_addr = gmin_detect_pmic(subdev);
 
+	gs = gmin_subdev_add(subdev);
 	gs->csi_fmt = csi_format;
 	gs->csi_bayer = csi_bayer;
+	gs->pwm_i2c_addr = pmic_i2c_addr;
 
 	if (gs->pmc_clk)
 		return &pmic_gmin_plat;
-- 
2.27.0

[PATCH v3 2/5] media: atomisp: Use temporary variable for device in gmin_subdev_add()

[Andy Shevchenko]

Use temporary variable for device in gmin_subdev_add().

While here, drop unused temporary variable for device in other places.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 .../media/atomisp/pci/atomisp_gmin_platform.c   | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index 7f846a61858d..aa4424a60e92 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -514,19 +514,14 @@ static int gmin_detect_pmic(struct v4l2_subdev *subdev)
 static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	struct device *dev = &client->dev;
 	struct acpi_device *adev;
 	struct gmin_subdev *gs;
 	acpi_handle handle;
-	struct device *dev;
 	int i, ret, clock_num = -1;
 
-	if (!client)
-		return NULL;
-
-	dev = &client->dev;
-
 	handle = ACPI_HANDLE(dev);
-	adev = ACPI_COMPANION(&client->dev);
+	adev = ACPI_COMPANION(dev);
 
 	dev_info(&client->dev, "%s: ACPI detected it on bus ID=%s, HID=%s\n",
 		__func__, acpi_device_bid(adev), acpi_device_hid(adev));
@@ -842,12 +837,8 @@ static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on)
 {
 	struct gmin_subdev *gs = find_gmin_subdev(subdev);
 	int ret;
-	struct device *dev;
-	struct i2c_client *client = v4l2_get_subdevdata(subdev);
 	int value;
 
-	dev = &client->dev;
-
 	if (gs->v1p8_gpio >= 0) {
 		pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n",
 			gs->v1p8_gpio);
@@ -900,12 +891,8 @@ static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on)
 {
 	struct gmin_subdev *gs = find_gmin_subdev(subdev);
 	int ret;
-	struct device *dev;
-	struct i2c_client *client = v4l2_get_subdevdata(subdev);
 	int value;
 
-	dev = &client->dev;
-
 	if (gs->v2p8_gpio >= 0) {
 		pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n",
 			gs->v2p8_gpio);
-- 
2.27.0

[PATCH v3 3/5] media: atomisp: Provide Gmin subdev as parameter to gmin_subdev_add()

[Andy Shevchenko]

Provide Gmin subdev as parameter to gmin_subdev_add()
to avoid direct global variable usage.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 .../media/atomisp/pci/atomisp_gmin_platform.c | 47 +++++++++----------
 1 file changed, 22 insertions(+), 25 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index aa4424a60e92..8e66fe6f407e 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -511,14 +511,13 @@ static int gmin_detect_pmic(struct v4l2_subdev *subdev)
 	return pmic_i2c_addr;
 }
 
-static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
+static int gmin_subdev_add(struct gmin_subdev *gs)
 {
-	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(gs->subdev);
 	struct device *dev = &client->dev;
 	struct acpi_device *adev;
-	struct gmin_subdev *gs;
 	acpi_handle handle;
-	int i, ret, clock_num = -1;
+	int ret, clock_num = -1;
 
 	handle = ACPI_HANDLE(dev);
 	adev = ACPI_COMPANION(dev);
@@ -526,14 +525,6 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 	dev_info(&client->dev, "%s: ACPI detected it on bus ID=%s, HID=%s\n",
 		__func__, acpi_device_bid(adev), acpi_device_hid(adev));
 
-	for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
-		;
-	if (i >= MAX_SUBDEVS)
-		return NULL;
-
-	gs = &gmin_subdevs[i];
-	gs->subdev = subdev;
-
 	/*
 	 * FIXME:
 	 * 	WA:CHT requires XTAL clock as PLL is not stable.
@@ -609,8 +600,7 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 	    acpi_device_can_poweroff(adev)) {
 		dev_info(dev,
 			 "gmin: power management provided via device PM\n");
-
-		return gs;
+		return 0;
 	}
 
 	/*
@@ -643,7 +633,7 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 
 	if (clock_num < 0 || clock_num > MAX_CLK_COUNT) {
 		dev_err(dev, "Invalid clock number\n");
-		return NULL;
+		return -EINVAL;
 	}
 
 	snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name),
@@ -652,13 +642,8 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 	gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
 	if (IS_ERR(gs->pmc_clk)) {
 		ret = PTR_ERR(gs->pmc_clk);
-
-		dev_err(dev,
-			"Failed to get clk from %s : %d\n",
-			gmin_pmc_clk_name,
-			ret);
-
-		return NULL;
+		dev_err(dev, "Failed to get clk from %s: %d\n", gmin_pmc_clk_name, ret);
+		return ret;
 	}
 	dev_info(dev, "Will use CLK%d (%s)\n", clock_num, gmin_pmc_clk_name);
 
@@ -718,7 +703,7 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
 		break;
 	}
 
-	return gs;
+	return 0;
 }
 
 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
@@ -731,6 +716,16 @@ static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
 	return NULL;
 }
 
+static struct gmin_subdev *find_free_gmin_subdev_slot(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < MAX_SUBDEVS; i++)
+		if (gmin_subdevs[i].subdev == NULL)
+			return &gmin_subdevs[i];
+	return NULL;
+}
+
 static int axp_regulator_set(struct device *dev, struct gmin_subdev *gs,
 			     int sel_reg, u8 setting,
 			     int ctrl_reg, int shift, bool on)
@@ -1063,14 +1058,16 @@ struct camera_sensor_platform_data *gmin_camera_platform_data(
     enum atomisp_input_format csi_format,
     enum atomisp_bayer_order csi_bayer)
 {
-	struct gmin_subdev *gs;
 	u8 pmic_i2c_addr = gmin_detect_pmic(subdev);
+	struct gmin_subdev *gs;
 
-	gs = gmin_subdev_add(subdev);
+	gs = find_free_gmin_subdev_slot();
+	gs->subdev = subdev;
 	gs->csi_fmt = csi_format;
 	gs->csi_bayer = csi_bayer;
 	gs->pwm_i2c_addr = pmic_i2c_addr;
 
+	gmin_subdev_add(gs);
 	if (gs->pmc_clk)
 		return &pmic_gmin_plat;
 	else
-- 
2.27.0

[PATCH v3 4/5] media: atomisp: Get rid of ACPI specifics in gmin_subdev_add()

[Andy Shevchenko]

First of all ACPI HID is a part of the device name which is printed
as a part of the dev_info(dev, ...); line. Second, since the only BID
is left, it's a part of ACPI path, which can be printed via %pfw.

Besides that, drop ACPI handle from atomisp_get_acpi_power() parameters.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 .../media/atomisp/pci/atomisp_gmin_platform.c      | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index 8e66fe6f407e..63a812ac2b43 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -423,12 +423,13 @@ static int gmin_i2c_write(struct device *dev, u16 i2c_addr, u8 reg,
 	return ret;
 }
 
-static int atomisp_get_acpi_power(struct device *dev, acpi_handle handle)
+static int atomisp_get_acpi_power(struct device *dev)
 {
 	char name[5];
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 	struct acpi_buffer b_name = { sizeof(name), name };
 	union acpi_object *package, *element;
+	acpi_handle handle = ACPI_HANDLE(dev);
 	acpi_handle rhandle;
 	acpi_status status;
 	int clock_num = -1;
@@ -515,15 +516,10 @@ static int gmin_subdev_add(struct gmin_subdev *gs)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(gs->subdev);
 	struct device *dev = &client->dev;
-	struct acpi_device *adev;
-	acpi_handle handle;
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	int ret, clock_num = -1;
 
-	handle = ACPI_HANDLE(dev);
-	adev = ACPI_COMPANION(dev);
-
-	dev_info(&client->dev, "%s: ACPI detected it on bus ID=%s, HID=%s\n",
-		__func__, acpi_device_bid(adev), acpi_device_hid(adev));
+	dev_info(dev, "%s: ACPI path is %pfw\n", __func__, dev_fwnode(dev));
 
 	/*
 	 * FIXME:
@@ -625,7 +621,7 @@ static int gmin_subdev_add(struct gmin_subdev *gs)
 
 	/* Try first to use ACPI to get the clock resource */
 	if (acpi_device_power_manageable(adev))
-		clock_num = atomisp_get_acpi_power(dev, handle);
+		clock_num = atomisp_get_acpi_power(dev);
 
 	/* Fall-back use EFI and/or DMI match */
 	if (clock_num < 0)
-- 
2.27.0

[PATCH v3 5/5] media: atomisp: Clean up non-existing folders from Makefile

[Andy Shevchenko]

Compiler is not happy about leftovers:
cc1: warning: .../pci/hrt/: No such file or directory [-Wmissing-include-dirs]
cc1: warning: .../pci/hive_isp_css_include/memory_access/: No such file or directory [-Wmissing-include-dirs]
cc1: warning: .../pci/css_2400_system/hrt/: No such file or directory [-Wmissing-include-dirs]

Drop them from Makefile.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/staging/media/atomisp/Makefile | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/staging/media/atomisp/Makefile b/drivers/staging/media/atomisp/Makefile
index 41a5656da85c..9e5a29c6fb71 100644
--- a/drivers/staging/media/atomisp/Makefile
+++ b/drivers/staging/media/atomisp/Makefile
@@ -182,7 +182,6 @@ INCLUDES += \
 	-I$(atomisp)/include/hmm/ \
 	-I$(atomisp)/include/mmu/ \
 	-I$(atomisp)/pci/ \
-	-I$(atomisp)/pci/hrt/ \
 	-I$(atomisp)/pci/base/circbuf/interface/ \
 	-I$(atomisp)/pci/base/refcount/interface/ \
 	-I$(atomisp)/pci/camera/pipe/interface/ \
@@ -192,7 +191,6 @@ INCLUDES += \
 	-I$(atomisp)/pci/hive_isp_css_include/ \
 	-I$(atomisp)/pci/hive_isp_css_include/device_access/ \
 	-I$(atomisp)/pci/hive_isp_css_include/host/ \
-	-I$(atomisp)/pci/hive_isp_css_include/memory_access/ \
 	-I$(atomisp)/pci/hive_isp_css_shared/ \
 	-I$(atomisp)/pci/hive_isp_css_shared/host/ \
 	-I$(atomisp)/pci/isp/kernels/ \
@@ -311,9 +309,7 @@ INCLUDES += \
 	-I$(atomisp)/pci/runtime/tagger/interface/
 
 INCLUDES_byt += \
-	-I$(atomisp)/pci/css_2400_system/ \
 	-I$(atomisp)/pci/css_2400_system/hive/ \
-	-I$(atomisp)/pci/css_2400_system/hrt/ \
 
 INCLUDES_cht += \
 	-I$(atomisp)/pci/css_2401_system/ \
@@ -321,7 +317,6 @@ INCLUDES_cht += \
 	-I$(atomisp)/pci/css_2401_system/hive/ \
 	-I$(atomisp)/pci/css_2401_system/hrt/ \
 
-#	-I$(atomisp)/pci/css_2401_system/hrt/ \
 #	-I$(atomisp)/pci/css_2401_system/hive_isp_css_2401_system_generated/ \
 
 DEFINES := -DHRT_HW -DHRT_ISP_CSS_CUSTOM_HOST -DHRT_USE_VIR_ADDRS -D__HOST__
-- 
2.27.0