From patchwork Wed Dec 6 22:33:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Apitzsch?= X-Patchwork-Id: 751945 Received: from smtprelay03.ispgateway.de (smtprelay03.ispgateway.de [80.67.31.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BB25D72; Wed, 6 Dec 2023 14:38:53 -0800 (PST) Received: from [92.206.191.209] (helo=note-book.lan) by smtprelay03.ispgateway.de with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96.1) (envelope-from ) id 1rB0TH-0007Ur-1l; Wed, 06 Dec 2023 23:34:23 +0100 From: =?utf-8?q?Andr=C3=A9_Apitzsch?= Date: Wed, 06 Dec 2023 23:33:55 +0100 Subject: [PATCH v4 1/4] media: i2c: imx214: Explain some magic numbers Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231206-imx214-v4-1-7ef604b01dcb@apitzsch.eu> References: <20231206-imx214-v4-0-7ef604b01dcb@apitzsch.eu> In-Reply-To: <20231206-imx214-v4-0-7ef604b01dcb@apitzsch.eu> To: Ricardo Ribalda , Sakari Ailus , Mauro Carvalho Chehab Cc: Kieran Bingham , Jacopo Mondi , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, =?utf-8?q?Andr=C3=A9_Apitzsch?= , Ricardo Ribalda X-Mailer: b4 0.12.4 X-Df-Sender: YW5kcmVAYXBpdHpzY2guZXU= X-Spam-Level: * Code refinement, no functional changes. Reviewed-by: Ricardo Ribalda Reviewed-by: Kieran Bingham Signed-off-by: André Apitzsch --- drivers/media/i2c/imx214.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c index 8bc7b114c57d..7c9a240026c4 100644 --- a/drivers/media/i2c/imx214.c +++ b/drivers/media/i2c/imx214.c @@ -19,12 +19,23 @@ #include #include +#define IMX214_REG_MODE_SELECT 0x0100 +#define IMX214_MODE_STANDBY 0x00 +#define IMX214_MODE_STREAMING 0x01 + #define IMX214_DEFAULT_CLK_FREQ 24000000 #define IMX214_DEFAULT_LINK_FREQ 480000000 #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10) #define IMX214_FPS 30 #define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10 +/* Exposure control */ +#define IMX214_REG_EXPOSURE 0x0202 +#define IMX214_EXPOSURE_MIN 0 +#define IMX214_EXPOSURE_MAX 3184 +#define IMX214_EXPOSURE_STEP 1 +#define IMX214_EXPOSURE_DEFAULT 3184 + static const char * const imx214_supply_name[] = { "vdda", "vddd", @@ -665,7 +676,7 @@ static int imx214_set_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_EXPOSURE: vals[1] = ctrl->val; vals[0] = ctrl->val >> 8; - ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2); + ret = regmap_bulk_write(imx214->regmap, IMX214_REG_EXPOSURE, vals, 2); if (ret < 0) dev_err(imx214->dev, "Error %d\n", ret); ret = 0; @@ -743,7 +754,7 @@ static int imx214_start_streaming(struct imx214 *imx214) dev_err(imx214->dev, "could not sync v4l2 controls\n"); goto error; } - ret = regmap_write(imx214->regmap, 0x100, 1); + ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT, IMX214_MODE_STREAMING); if (ret < 0) { dev_err(imx214->dev, "could not sent start table %d\n", ret); goto error; @@ -761,7 +772,7 @@ static int imx214_stop_streaming(struct imx214 *imx214) { int ret; - ret = regmap_write(imx214->regmap, 0x100, 0); + ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT, IMX214_MODE_STANDBY); if (ret < 0) dev_err(imx214->dev, "could not sent stop table %d\n", ret); @@ -991,9 +1002,12 @@ static int imx214_probe(struct i2c_client *client) * * Yours sincerely, Ricardo. */ - imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops, + imx214->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx214_ctrl_ops, V4L2_CID_EXPOSURE, - 0, 3184, 1, 0x0c70); + IMX214_EXPOSURE_MIN, + IMX214_EXPOSURE_MAX, + IMX214_EXPOSURE_STEP, + IMX214_EXPOSURE_DEFAULT); imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls, NULL,