From patchwork Wed Mar 27 23:16:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Garcia X-Patchwork-Id: 13607687 Received: from mail-108-mta244.mxroute.com (mail-108-mta244.mxroute.com [136.175.108.244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B2BFF15666F for ; Wed, 27 Mar 2024 23:23:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=136.175.108.244 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711581807; cv=none; b=p7XF87jE/5vySomX84iqSXur+oOqKQuI/U2M77J7HUD6d0ERgI58IKwv7/R+/AKesSSVNZf+wdDYQ+u1RbJisFFAlFsusXb0iTiech7Pnf9hkfj03k8wtfizuOoyA/B2eqnoxQ0AytEhrmaVSUrqxNWMrjRSyN+Cw7LsBpzWnAw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711581807; c=relaxed/simple; bh=l/d1KTSxrdSi8t1Av6GsBX7faXE7YS03/s1Y6XmUM9o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I5nMaWmeQQwRZu1Sha2+MNSmRH3ParhM2aWXon7NC5jyYekyEL9xkL7qaL6JGPvXcEc9tMkEidnGD73dsRr/vS7u5ZS5EzszGLQJelUU8h2lwwHNfUnlUYME2cGkZll9yYPWVST9CkAj0WZxpmMXTjXyaykLNAZauc64By+i6/c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=luigi311.com; spf=pass smtp.mailfrom=luigi311.com; dkim=pass (2048-bit key) header.d=luigi311.com header.i=@luigi311.com header.b=LR/pr/hd; arc=none smtp.client-ip=136.175.108.244 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=luigi311.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=luigi311.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=luigi311.com header.i=@luigi311.com header.b="LR/pr/hd" Received: from filter006.mxroute.com ([136.175.111.2] filter006.mxroute.com) (Authenticated sender: mN4UYu2MZsgR) by mail-108-mta244.mxroute.com (ZoneMTA) with ESMTPSA id 18e8234741b0003bea.010 for (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384); Wed, 27 Mar 2024 23:17:39 +0000 X-Zone-Loop: 37bb64b6bb0d96189236335f22854c43b65502922c3a DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=luigi311.com; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Wfd3IM9yvSlmOOZPNTkn/UcYNYLQj3XQ9wKwbMSeFFA=; b=LR/pr/hdDf/T3GTNGYXS+y6rBl 5y9PzVXxJy1PDIf+IK31ZEVYkEVmOxaT2/N1x6hYlVMCQ3P5Jbx7DzKQ6bTa5zXctSrCR9bzy71wF jdWdIrN/3K14luv/kgu8JjkFpz3d0oX5yLYjJ6zyzCHCHHVC0qVhML3+4UOG9DuPCpGEkYOAj6/sq P0WftRtoeGDcrh5/8Vx8nLHk3S8hZdowl7HJMXR+VXRuGAtwTioxKfwFifrEXzoJYEKGteC9PrPpw VVqk+Y5QnueNqwbVM2E/oe+mMW66fBo+f6GWl3vnorfQRfYKTa7qpcsTTvQQaJW6Q2rM01gnzWOEF 6rYt0BEg==; From: git@luigi311.com To: linux-media@vger.kernel.org Cc: dave.stevenson@raspberrypi.com, jacopo.mondi@ideasonboard.com, mchehab@kernel.org, robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, sakari.ailus@linux.intel.com, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 10/23] media: i2c: imx258: Follow normal V4L2 behaviours for clipping exposure Date: Wed, 27 Mar 2024 17:16:56 -0600 Message-ID: <20240327231710.53188-11-git@luigi311.com> In-Reply-To: <20240327231710.53188-1-git@luigi311.com> References: <20240327231710.53188-1-git@luigi311.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Authenticated-Id: personal@luigi311.com From: Dave Stevenson V4L2 sensor drivers are expected are expected to clip the supported exposure range based on the VBLANK configured. IMX258 wasn't doing that as register 0x350 (FRM_LENGTH_CTL) switches it to a mode where frame length tracks coarse exposure time. Disable this mode and clip the range for V4L2_CID_EXPOSURE appropriately based on V4L2_CID_VBLANK. Signed-off-by: Dave Stevenson Reviewed-by: Jacopo Mondi --- drivers/media/i2c/imx258.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c index c65b9aad3b0a..1f5fb980cfbe 100644 --- a/drivers/media/i2c/imx258.c +++ b/drivers/media/i2c/imx258.c @@ -37,10 +37,11 @@ /* Exposure control */ #define IMX258_REG_EXPOSURE 0x0202 +#define IMX258_EXPOSURE_OFFSET 10 #define IMX258_EXPOSURE_MIN 4 #define IMX258_EXPOSURE_STEP 1 #define IMX258_EXPOSURE_DEFAULT 0x640 -#define IMX258_EXPOSURE_MAX 65535 +#define IMX258_EXPOSURE_MAX (IMX258_VTS_MAX - IMX258_EXPOSURE_OFFSET) /* Analog gain control */ #define IMX258_REG_ANALOG_GAIN 0x0204 @@ -371,7 +372,7 @@ static const struct imx258_reg mode_common_regs[] = { { 0x303A, 0x00 }, { 0x303B, 0x10 }, { 0x300D, 0x00 }, - { 0x0350, 0x01 }, + { 0x0350, 0x00 }, { 0x0204, 0x00 }, { 0x0205, 0x00 }, { 0x020E, 0x01 }, @@ -741,6 +742,19 @@ static int imx258_update_digital_gain(struct imx258 *imx258, u32 len, u32 val) return 0; } +static void imx258_adjust_exposure_range(struct imx258 *imx258) +{ + int exposure_max, exposure_def; + + /* Honour the VBLANK limits when setting exposure. */ + exposure_max = imx258->cur_mode->height + imx258->vblank->val - + IMX258_EXPOSURE_OFFSET; + exposure_def = min(exposure_max, imx258->exposure->val); + __v4l2_ctrl_modify_range(imx258->exposure, imx258->exposure->minimum, + exposure_max, imx258->exposure->step, + exposure_def); +} + static int imx258_set_ctrl(struct v4l2_ctrl *ctrl) { struct imx258 *imx258 = @@ -748,6 +762,13 @@ static int imx258_set_ctrl(struct v4l2_ctrl *ctrl) struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd); int ret = 0; + /* + * The VBLANK control may change the limits of usable exposure, so check + * and adjust if necessary. + */ + if (ctrl->id == V4L2_CID_VBLANK) + imx258_adjust_exposure_range(imx258); + /* * Applying V4L2 control value only happens * when power is up for streaming