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[86.13.91.161]) by smtp.gmail.com with ESMTPSA id r205sm6378507wma.3.2021.10.21.14.44.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Oct 2021 14:44:06 -0700 (PDT) From: Daniel Scally To: linux-media@vger.kernel.org, paul.kocialkowski@bootlin.com Cc: Yong Zhi , Sakari Ailus , Bingbu Cao , Dan Scally , Tianshu Qiu , Andy Shevchenko , hdegoede@redhat.com, laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com Subject: [PATCH v3 12/16] media: i2c: Switch exposure control unit to lines Date: Thu, 21 Oct 2021 22:43:27 +0100 Message-Id: <20211021214331.1188787-13-djrscally@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211021214331.1188787-1-djrscally@gmail.com> References: <20211021214331.1188787-1-djrscally@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The ov8865 driver currently has the unit of the V4L2_CID_EXPOSURE control as 1/16th of a line. This is what the sensor expects, but isn't very intuitive. Switch the control to be in units of a line and simply do the 16x multiplication before passing the value to the sensor. The datasheet for this sensor gives minimum exposure as 2 lines, so take the opportunity to correct the lower bounds of the control. Signed-off-by: Daniel Scally --- Changes in v3: - None drivers/media/i2c/ov8865.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c index 5fec1e35eea5..0bf3f72892f7 100644 --- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -2125,6 +2125,9 @@ static int ov8865_exposure_configure(struct ov8865_sensor *sensor, u32 exposure) { int ret; + /* The sensor stores exposure in units of 1/16th of a line */ + exposure *= 16; + ret = ov8865_write(sensor, OV8865_EXPOSURE_CTRL_HH_REG, OV8865_EXPOSURE_CTRL_HH(exposure)); if (ret) @@ -2525,8 +2528,8 @@ static int ov8865_ctrls_init(struct ov8865_sensor *sensor) /* Exposure */ - ctrls->exposure = v4l2_ctrl_new_std(handler, ops, V4L2_CID_EXPOSURE, 16, - 1048575, 16, 512); + ctrls->exposure = v4l2_ctrl_new_std(handler, ops, V4L2_CID_EXPOSURE, 2, + 65535, 1, 32); /* Gain */