From patchwork Tue Feb 4 07:04:38 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jai Luthra X-Patchwork-Id: 13958719 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DE71B2046B1; Tue, 4 Feb 2025 07:05:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738652727; cv=none; b=iVbynKB2xwUVVq+noPgGKYEQTuSBDQMZ/Qg3zD6jr9zkH3jWlH6KdETbNTz7QQy9WKNw/Xz4xoSGjpx7vLYnBQeyIDsY+e2klTz4C9RgBKgMSFeQp/aLV08FEK5lTnW96N1lrzBqlKENnniWNI/RpVo/Kn4NcbUAi/aSk1qcwYg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738652727; c=relaxed/simple; bh=vIyFYBeQc9jLvlrN5HnokpDA4PpMC0ptcjbL0vZkDgI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=JGEgG3fftmtXj4eFCT/1BwX4Lwttc+uTktIcVNz5aGj3ctHmRNgaNTJ00UuD7KCZ0hzabzJDeT9mvzbz0HomQYJbZldIIBBHkzdLGFCPFhpALkoXr1cykyVYePnhBxNiCB+20ifxyCLQHI+xGg3WWw46d6HKgYRLHhD1B4VrO9c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=v8VRc3Em; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="v8VRc3Em" Received: from mail.ideasonboard.com (unknown [IPv6:2401:4900:8839:be31:a1f6:6475:ef19:2df7]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 44F28CDB; Tue, 4 Feb 2025 08:04:12 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1738652652; bh=vIyFYBeQc9jLvlrN5HnokpDA4PpMC0ptcjbL0vZkDgI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=v8VRc3Em7GxlPxmuEZQSkfsq0ONMqYjRMMjY6mgNsOvi2Lj1jaZmrCeRL8ikFd+kT 9Nq70Zs1mdQkLw+UfkOTqcCSmN/twQgkm4OKE4dyl0o5R+WhRHdYvW/V93tAslKol1 ZvLz1Dz+74WlraKWmh+i2NW1OTDQcp6E+u6L+jDg= From: Jai Luthra Date: Tue, 04 Feb 2025 12:34:38 +0530 Subject: [PATCH v6 3/5] media: i2c: imx219: make HBLANK r/w to allow longer exposures Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250204-imx219_fixes-v6-3-84ffa5030972@ideasonboard.com> References: <20250204-imx219_fixes-v6-0-84ffa5030972@ideasonboard.com> In-Reply-To: <20250204-imx219_fixes-v6-0-84ffa5030972@ideasonboard.com> To: Dave Stevenson , Sakari Ailus , Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Jacopo Mondi , Laurent Pinchart , Jai Luthra X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=5281; i=jai.luthra@ideasonboard.com; h=from:subject:message-id; bh=TXRnc+Lo+W2/ztJl98NFA7mkkNy355PHmhaY9k2pnUc=; b=owEBbQKS/ZANAwAIAUPekfkkmnFFAcsmYgBnobwdbed8whT5/MAqzSn8LiiyvCPy4NTkccS+b stB/gXdTu6JAjMEAAEIAB0WIQRN4NgY5dV16NRar8VD3pH5JJpxRQUCZ6G8HQAKCRBD3pH5JJpx RefiEADIY+rOqA8ip4TP0K8zDpIFL2tbSeFEhKqumEfYZYg2NiowhyNOGvbvp9OLReHrepySutb xjinMKD4CiI34lGHVYNECUgh+0P9rk2fFM2zk6xSnwzONAQr7h20n9iz0IRLloEW6zGBdRJmgtm /JumhHKpnq0BeP1H8cNBnULMsqQwCK9muXdOoJj7BtoB+b+Rela9a4jA4K21zW5pBHvav+1DUA3 pAL//4E1Hk3zLWuqQwizoo6y2pDB1aKWVJjHXmmGSCrG0oDvMPQT/b7od/lUKRLuqy7cDP4ZMSN Q/Eja/pWb58vx5LM5KTiVxJUKVIzkCJ7zZmvS4vUxz6pzeWVXOGCHbxUF9B3dmEsBw9yFnMvpR3 bTEBUfX1I1qLBfaDIDYGbtMgBTB6i9gDPVM55fPHAYex3s/XLFd2cok1YnWA3Id5Cw0YsCDc3gW 4LY7VREIo/Z90sdCWEI0eJjkGAeAgMtnTNA/Hjh4Hk7PnNPwzAK5RmVFvAKOOsm4CFqv8dIp3dx ZxnNENa9ZzJthR1CxQSduaHTRZLUdqdUjEUt2ugdkDNqPfeHlCmBxZV+xcsmpL/DMUnQTZLkVHL u/CHD3ioREmh5TWMa4HozMm4O3EmO5GdaxtWj7J7JSvxtme3mw9baIrRQgnDZnnsx+W5d8aO+hS m6SLUAHIt4SqIgQ== X-Developer-Key: i=jai.luthra@ideasonboard.com; a=openpgp; fpr=4DE0D818E5D575E8D45AAFC543DE91F9249A7145 From: Dave Stevenson The HBLANK control was read-only, and always configured such that the sensor line length register was 3448. This limited the maximum exposure time that could be achieved to around 1.26 secs. Make HBLANK read/write so that the line time can be extended, and thereby allow longer exposures (and slower frame rates). Retain the overall line length setting when changing modes rather than resetting it to a default. Signed-off-by: Dave Stevenson Reviewed-by: Jacopo Mondi Signed-off-by: Jai Luthra --- drivers/media/i2c/imx219.c | 48 +++++++++++++++++++++++++++------------------- 1 file changed, 28 insertions(+), 20 deletions(-) diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c index 66460a179e8a9fc1f1216f6beffce4bcd35ff6aa..8239e7ea8ec03849b339c1f314485266d4c4d8bd 100644 --- a/drivers/media/i2c/imx219.c +++ b/drivers/media/i2c/imx219.c @@ -73,11 +73,10 @@ #define IMX219_REG_FRM_LENGTH_A CCI_REG16(0x0160) #define IMX219_FLL_MAX 0xffff #define IMX219_VBLANK_MIN 32 - -/* HBLANK control - read only */ -#define IMX219_PPL_DEFAULT 3448 - #define IMX219_REG_LINE_LENGTH_A CCI_REG16(0x0162) +#define IMX219_LLP_MIN 0x0d78 +#define IMX219_LLP_MAX 0x7ff0 + #define IMX219_REG_X_ADD_STA_A CCI_REG16(0x0164) #define IMX219_REG_X_ADD_END_A CCI_REG16(0x0166) #define IMX219_REG_Y_ADD_STA_A CCI_REG16(0x0168) @@ -191,7 +190,6 @@ static const struct cci_reg_sequence imx219_common_regs[] = { { CCI_REG8(0x479b), 0x0e }, /* Frame Bank Register Group "A" */ - { IMX219_REG_LINE_LENGTH_A, 3448 }, { IMX219_REG_X_ODD_INC_A, 1 }, { IMX219_REG_Y_ODD_INC_A, 1 }, @@ -420,6 +418,10 @@ static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) cci_write(imx219->regmap, IMX219_REG_FRM_LENGTH_A, format->height + ctrl->val, &ret); break; + case V4L2_CID_HBLANK: + cci_write(imx219->regmap, IMX219_REG_LINE_LENGTH_A, + format->width + ctrl->val, &ret); + break; case V4L2_CID_TEST_PATTERN_RED: cci_write(imx219->regmap, IMX219_REG_TESTP_RED, ctrl->val, &ret); @@ -465,7 +467,7 @@ static int imx219_init_controls(struct imx219 *imx219) const struct imx219_mode *mode = &supported_modes[0]; struct v4l2_ctrl_handler *ctrl_hdlr; struct v4l2_fwnode_device_properties props; - int exposure_max, exposure_def, hblank; + int exposure_max, exposure_def; int i, ret; ctrl_hdlr = &imx219->ctrl_handler; @@ -489,17 +491,16 @@ static int imx219_init_controls(struct imx219 *imx219) if (imx219->link_freq) imx219->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; - /* Initial vblank/hblank/exposure parameters based on current mode */ + /* Initial blanking and exposure. Limits are updated during set_fmt */ imx219->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_VBLANK, IMX219_VBLANK_MIN, IMX219_FLL_MAX - mode->height, 1, mode->fll_def - mode->height); - hblank = IMX219_PPL_DEFAULT - mode->width; imx219->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, - V4L2_CID_HBLANK, hblank, hblank, - 1, hblank); - if (imx219->hblank) - imx219->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + V4L2_CID_HBLANK, + IMX219_LLP_MIN - mode->width, + IMX219_LLP_MAX - mode->width, 1, + IMX219_LLP_MIN - mode->width); exposure_max = mode->fll_def - 4; exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? exposure_max : IMX219_EXPOSURE_DEFAULT; @@ -815,6 +816,10 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; unsigned int bin_h, bin_v; + u32 prev_line_len; + + format = v4l2_subdev_state_get_format(state, 0); + prev_line_len = format->width + imx219->hblank->val; mode = v4l2_find_nearest_size(supported_modes, ARRAY_SIZE(supported_modes), @@ -822,8 +827,6 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, fmt->format.width, fmt->format.height); imx219_update_pad_format(imx219, mode, &fmt->format, fmt->format.code); - - format = v4l2_subdev_state_get_format(state, 0); *format = fmt->format; /* @@ -859,13 +862,18 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, exposure_max, imx219->exposure->step, exposure_def); /* - * Currently PPL is fixed to IMX219_PPL_DEFAULT, so hblank - * depends on mode->width only, and is not changeble in any - * way other than changing the mode. + * Retain PPL setting from previous mode so that the + * line time does not change on a mode change. + * Limits have to be recomputed as the controls define + * the blanking only, so PPL values need to have the + * mode width subtracted. */ - hblank = IMX219_PPL_DEFAULT - mode->width; - __v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank, 1, - hblank); + hblank = prev_line_len - mode->width; + __v4l2_ctrl_modify_range(imx219->hblank, + IMX219_LLP_MIN - mode->width, + IMX219_LLP_MAX - mode->width, 1, + IMX219_LLP_MIN - mode->width); + __v4l2_ctrl_s_ctrl(imx219->hblank, hblank); } return 0;