linux-kernel - [PATCH v9 4/4] media: i2c: imx334: update pixel and link frequency

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Date:   Fri, 13 Jan 2023 06:31:35 +0530
From:   shravan kumar <shravan.chippa@...rochip.com>
To:     <paul.j.murphy@...el.com>, <daniele.alessandrelli@...el.com>,
        <mchehab@...nel.org>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "shravan kumar" <shravan.chippa@...rochip.com>,
        Sakari Ailus <sakari.ailus@....fi>
Subject: [PATCH v9 4/4] media: i2c: imx334: update pixel and link frequency

From: Shravan Chippa <shravan.chippa@...rochip.com>

Update pixel_rate and link frequency for 1920x1080@30
while changing mode.

Add dummy ctrl cases for pixel_rate and link frequency
to avoid error while changing the modes dynamically

Suggested-by: Sakari Ailus <sakari.ailus@....fi>
Signed-off-by: Shravan Chippa <shravan.chippa@...rochip.com>
---
 drivers/media/i2c/imx334.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/imx334.c b/drivers/media/i2c/imx334.c
index 4ab1b9eb9a64..373022fbd6b2 100644
--- a/drivers/media/i2c/imx334.c
+++ b/drivers/media/i2c/imx334.c
@@ -49,7 +49,8 @@
 #define IMX334_INCLK_RATE	24000000
 
 /* CSI2 HW configuration */
-#define IMX334_LINK_FREQ	891000000
+#define IMX334_LINK_FREQ_891M	891000000
+#define IMX334_LINK_FREQ_445M	445500000
 #define IMX334_NUM_DATA_LANES	4
 
 #define IMX334_REG_MIN		0x00
@@ -144,7 +145,8 @@ struct imx334 {
 };
 
 static const s64 link_freq[] = {
-	IMX334_LINK_FREQ,
+	IMX334_LINK_FREQ_891M,
+	IMX334_LINK_FREQ_445M,
 };
 
 /* Sensor mode registers */
@@ -468,7 +470,7 @@ static const struct imx334_mode supported_modes[] = {
 		.vblank_min = 45,
 		.vblank_max = 132840,
 		.pclk = 297000000,
-		.link_freq_idx = 0,
+		.link_freq_idx = 1,
 		.reg_list = {
 			.num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
 			.regs = mode_1920x1080_regs,
@@ -598,6 +600,11 @@ static int imx334_update_controls(struct imx334 *imx334,
 	if (ret)
 		return ret;
 
+	ret = __v4l2_ctrl_modify_range(imx334->pclk_ctrl, mode->pclk,
+				       mode->pclk, 1, mode->pclk);
+	if (ret)
+		return ret;
+
 	ret = __v4l2_ctrl_modify_range(imx334->hblank_ctrl, mode->hblank,
 				       mode->hblank, 1, mode->hblank);
 	if (ret)
@@ -698,6 +705,8 @@ static int imx334_set_ctrl(struct v4l2_ctrl *ctrl)
 		pm_runtime_put(imx334->dev);
 
 		break;
+	case V4L2_CID_PIXEL_RATE:
+	case V4L2_CID_LINK_FREQ:
 	case V4L2_CID_HBLANK:
 		ret = 0;
 		break;
@@ -1102,7 +1111,7 @@ static int imx334_parse_hw_config(struct imx334 *imx334)
 	}
 
 	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
-		if (bus_cfg.link_frequencies[i] == IMX334_LINK_FREQ)
+		if (bus_cfg.link_frequencies[i] == IMX334_LINK_FREQ_891M)
 			goto done_endpoint_free;
 
 	ret = -EINVAL;
-- 
2.34.1