From nobody Sun Dec 28 17:31:00 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7678C10DC1 for ; Wed, 6 Dec 2023 22:38:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377554AbjLFWit (ORCPT ); Wed, 6 Dec 2023 17:38:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230435AbjLFWir (ORCPT ); Wed, 6 Dec 2023 17:38:47 -0500 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 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Code refinement, no functional changes. Reviewed-by: Ricardo Ribalda Reviewed-by: Kieran Bingham Signed-off-by: Andr=C3=A9 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 =20 +#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 =20 +/* 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[] =3D { "vdda", "vddd", @@ -665,7 +676,7 @@ static int imx214_set_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_EXPOSURE: vals[1] =3D ctrl->val; vals[0] =3D ctrl->val >> 8; - ret =3D regmap_bulk_write(imx214->regmap, 0x202, vals, 2); + ret =3D regmap_bulk_write(imx214->regmap, IMX214_REG_EXPOSURE, vals, 2); if (ret < 0) dev_err(imx214->dev, "Error %d\n", ret); ret =3D 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 =3D regmap_write(imx214->regmap, 0x100, 1); + ret =3D 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; =20 - ret =3D regmap_write(imx214->regmap, 0x100, 0); + ret =3D 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); =20 @@ -991,9 +1002,12 @@ static int imx214_probe(struct i2c_client *client) * * Yours sincerely, Ricardo. */ - imx214->exposure =3D v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops, + imx214->exposure =3D 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); =20 imx214->unit_size =3D v4l2_ctrl_new_std_compound(&imx214->ctrls, NULL, --=20 2.43.0