From patchwork Sun Apr 14 20:34:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Garcia X-Patchwork-Id: 13629284 Received: from mail-108-mta57.mxroute.com (mail-108-mta57.mxroute.com [136.175.108.57]) (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 00B1D137741 for ; Sun, 14 Apr 2024 20:40:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=136.175.108.57 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713127247; cv=none; b=R0bnO4TyfVtxHf86iFxDNPywUV6zY9rlvFp/bn9hvOnDxwyJiDLzdFaPtGNXp/AzLvKTWaYHecmVSkEeatoY5jZhaB1jSk9wgcMHgi5CoV5C8Q6P8hLNOKIcywAOxA2L8LIm/VAYlZNkMeFz1rfrSob7yeKS0IeGALu4CB1grA0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713127247; c=relaxed/simple; bh=4KQV0NHOt7hQp4p/mm19QOVdO1e0l84pdOZTBhUWfug=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iIhx2oem3Uc8Lr6M8xwHx6oTANx67ohJtkydPJP/DIDRH6u66boTd/QgiOLF5iEcW6E87WIweskdyj+9P+3fyKKFnceeSP46lWOsH/ynYA078+ise/9mg6F1cB/GHIeUhmDc/svjOtLS8xU2pyvWmEXYtOHUI9bPNr5M3k9hNGo= 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=s7HZwJSs; arc=none smtp.client-ip=136.175.108.57 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="s7HZwJSs" Received: from filter006.mxroute.com ([136.175.111.2] filter006.mxroute.com) (Authenticated sender: mN4UYu2MZsgR) by mail-108-mta57.mxroute.com (ZoneMTA) with ESMTPSA id 18ede527fd90003bea.00a for (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384); Sun, 14 Apr 2024 20:35:32 +0000 X-Zone-Loop: 904f6019580748ce8284c461f23880efb6032daa1ec5 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=TqJSDNIcYAg5c5AK2hjAXrI8p2YMYTt9oVpXL5nQoOw=; b=s7HZwJSsIS0Iad2h5B8qEZkFEz NKsC89b3a+eV0yfT5vmndI6FkINsnFCrWjnjbx4CayODdVP+0BGEAzs+qCrHw4WYqk7VlFQ91Pjcr Y89WsOSgB7klnxNJfLiCqVQThw8a2LXPfpMxQmhKFCwcoA2CIsHxQkFzJBcLVuARoZd6yIRZffDo8 kuqI6XjYmAbTqHAsyx1J0aVp4rZuk4iN3c5JThMGlXfqPFX4ufGokjqlMFD/i+ofjPHhYWiu1MG3R 4AP+z7HBeEd/Z8Mh2n9jtYE4XymcfJfTeZifZG6wB5wfGiU21Pa/RliPbu48206GJD37XHwEUNZqr YSQ7qiEg==; 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, pavel@ucw.cz, phone-devel@vger.kernel.org, Luis Garcia Subject: [PATCH v4 10/25] media: i2c: imx258: Follow normal V4L2 behaviours for clipping exposure Date: Sun, 14 Apr 2024 14:34:48 -0600 Message-ID: <20240414203503.18402-11-git@luigi311.com> In-Reply-To: <20240414203503.18402-1-git@luigi311.com> References: <20240414203503.18402-1-git@luigi311.com> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Authenticated-Id: personal@luigi311.com From: Dave Stevenson V4L2 sensor drivers 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 Signed-off-by: Luis Garcia --- 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 8f792f0e0738..ebc404b548b3 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 }, @@ -734,6 +735,19 @@ 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 = @@ -741,6 +755,13 @@ 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