[PATCH 4/4] media: imx355: Use v4l2_link_frequencies_to_bitmap helper

[Sakari Ailus <sakari.ailus@linux.intel.com>]

Use the v4l2_link_frequencies_to_bitmap() helper to figure out which
driver-supported link frequencies can be used on a given system.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/i2c/imx355.c | 53 ++++++++++----------------------------
 1 file changed, 14 insertions(+), 39 deletions(-)

diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c
index 8c995c58743a..51e3f3ae53da 100644
--- a/drivers/media/i2c/imx355.c
+++ b/drivers/media/i2c/imx355.c
@@ -56,7 +56,7 @@
 #define IMX355_REG_ORIENTATION		0x0101
 
 /* default link frequency and external clock */
-#define IMX355_LINK_FREQ_DEFAULT	360000000
+#define IMX355_LINK_FREQ_DEFAULT	360000000LL
 #define IMX355_EXT_CLK			19200000
 #define IMX355_LINK_FREQ_INDEX		0
 
@@ -93,8 +93,7 @@ struct imx355_mode {
 
 struct imx355_hwcfg {
 	u32 ext_clk;			/* sensor external clk */
-	s64 *link_freqs;		/* CSI-2 link frequencies */
-	unsigned int nr_of_link_freqs;
+	unsigned long link_freq_bitmap;
 };
 
 struct imx355 {
@@ -115,7 +114,6 @@ struct imx355 {
 	const struct imx355_mode *cur_mode;
 
 	struct imx355_hwcfg *hwcfg;
-	s64 link_def_freq;	/* CSI-2 link default frequency */
 
 	/*
 	 * Mutex for serialized access:
@@ -879,7 +877,10 @@ static const char * const imx355_test_pattern_menu[] = {
 	"Pseudorandom Sequence (PN9)",
 };
 
-/* supported link frequencies */
+/*
+ * When adding more than the one below, make sure the disallowed ones will
+ * actually be disabled in the LINK_FREQ control.
+ */
 static const s64 link_freq_menu_items[] = {
 	IMX355_LINK_FREQ_DEFAULT,
 };
@@ -1356,7 +1357,7 @@ imx355_set_pad_format(struct v4l2_subdev *sd,
 		*framefmt = fmt->format;
 	} else {
 		imx355->cur_mode = mode;
-		pixel_rate = imx355->link_def_freq * 2 * 4;
+		pixel_rate = IMX355_LINK_FREQ_DEFAULT * 2 * 4;
 		do_div(pixel_rate, 10);
 		__v4l2_ctrl_s_ctrl_int64(imx355->pixel_rate, pixel_rate);
 		/* Update limits and set FPS to default */
@@ -1543,7 +1544,7 @@ static int imx355_init_controls(struct imx355 *imx355)
 		imx355->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 
 	/* pixel_rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
-	pixel_rate = imx355->link_def_freq * 2 * 4;
+	pixel_rate = IMX355_LINK_FREQ_DEFAULT * 2 * 4;
 	do_div(pixel_rate, 10);
 	/* By default, PIXEL_RATE is read only */
 	imx355->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
@@ -1620,7 +1621,6 @@ static struct imx355_hwcfg *imx355_get_hwcfg(struct device *dev)
 	};
 	struct fwnode_handle *ep;
 	struct fwnode_handle *fwnode = dev_fwnode(dev);
-	unsigned int i;
 	int ret;
 
 	if (!fwnode)
@@ -1652,24 +1652,14 @@ static struct imx355_hwcfg *imx355_get_hwcfg(struct device *dev)
 		goto out_err;
 	}
 
-	dev_dbg(dev, "num of link freqs: %d", bus_cfg.nr_of_link_frequencies);
-	if (!bus_cfg.nr_of_link_frequencies) {
-		dev_warn(dev, "no link frequencies defined");
-		goto out_err;
-	}
-
-	cfg->nr_of_link_freqs = bus_cfg.nr_of_link_frequencies;
-	cfg->link_freqs = devm_kcalloc(dev,
-				       bus_cfg.nr_of_link_frequencies + 1,
-				       sizeof(*cfg->link_freqs), GFP_KERNEL);
-	if (!cfg->link_freqs)
+	ret = v4l2_link_frequencies_to_bitmap(dev, bus_cfg.link_frequencies,
+					      bus_cfg.nr_of_link_frequencies,
+					      link_freq_menu_items,
+					      ARRAY_SIZE(link_freq_menu_items),
+					      &cfg->link_freq_bitmap);
+	if (ret)
 		goto out_err;
 
-	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
-		cfg->link_freqs[i] = bus_cfg.link_frequencies[i];
-		dev_dbg(dev, "link_freq[%d] = %lld", i, cfg->link_freqs[i]);
-	}
-
 	v4l2_fwnode_endpoint_free(&bus_cfg);
 	fwnode_handle_put(ep);
 	return cfg;
@@ -1684,7 +1674,6 @@ static int imx355_probe(struct i2c_client *client)
 {
 	struct imx355 *imx355;
 	int ret;
-	u32 i;
 
 	imx355 = devm_kzalloc(&client->dev, sizeof(*imx355), GFP_KERNEL);
 	if (!imx355)
@@ -1709,20 +1698,6 @@ static int imx355_probe(struct i2c_client *client)
 		goto error_probe;
 	}
 
-	imx355->link_def_freq = link_freq_menu_items[IMX355_LINK_FREQ_INDEX];
-	for (i = 0; i < imx355->hwcfg->nr_of_link_freqs; i++) {
-		if (imx355->hwcfg->link_freqs[i] == imx355->link_def_freq) {
-			dev_dbg(&client->dev, "link freq index %d matched", i);
-			break;
-		}
-	}
-
-	if (i == imx355->hwcfg->nr_of_link_freqs) {
-		dev_err(&client->dev, "no link frequency supported");
-		ret = -EINVAL;
-		goto error_probe;
-	}
-
 	/* Set default mode to max resolution */
 	imx355->cur_mode = &supported_modes[0];
 
-- 
2.39.2