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Wed, 29 Jan 2025 07:03:54 -0800 (PST) From: Dave Stevenson Date: Wed, 29 Jan 2025 15:03:49 +0000 Subject: [PATCH v3 1/3] media: i2c: imx415: Add read/write control of VBLANK Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250129-media-imx415-v3-1-d16d4fa8fc10@raspberrypi.com> References: <20250129-media-imx415-v3-0-d16d4fa8fc10@raspberrypi.com> In-Reply-To: <20250129-media-imx415-v3-0-d16d4fa8fc10@raspberrypi.com> To: Sakari Ailus , Michael Riesch , Mauro Carvalho Chehab Cc: Gerald Loacker , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Dave Stevenson X-Mailer: b4 0.14.1 This also requires that the ranges for the exposure control are updated. Reviewed-by: Michael Riesch Signed-off-by: Dave Stevenson --- drivers/media/i2c/imx415.c | 52 ++++++++++++++++++++++++++++++---------------- 1 file changed, 34 insertions(+), 18 deletions(-) diff --git a/drivers/media/i2c/imx415.c b/drivers/media/i2c/imx415.c index 3f7924aa1bd3..fa7ffb9220e5 100644 --- a/drivers/media/i2c/imx415.c +++ b/drivers/media/i2c/imx415.c @@ -26,6 +26,7 @@ #define IMX415_PIXEL_ARRAY_WIDTH 3864 #define IMX415_PIXEL_ARRAY_HEIGHT 2192 #define IMX415_PIXEL_ARRAY_VBLANK 58 +#define IMX415_EXPOSURE_OFFSET 8 #define IMX415_NUM_CLK_PARAM_REGS 11 @@ -51,6 +52,7 @@ #define IMX415_OUTSEL CCI_REG8(0x30c0) #define IMX415_DRV CCI_REG8(0x30c1) #define IMX415_VMAX CCI_REG24_LE(0x3024) +#define IMX415_VMAX_MAX 0xfffff #define IMX415_HMAX CCI_REG16_LE(0x3028) #define IMX415_SHR0 CCI_REG24_LE(0x3050) #define IMX415_GAIN_PCG_0 CCI_REG16_LE(0x3090) @@ -447,7 +449,6 @@ static const struct imx415_clk_params imx415_clk_params[] = { /* all-pixel 2-lane 720 Mbps 15.74 Hz mode */ static const struct cci_reg_sequence imx415_mode_2_720[] = { - { IMX415_VMAX, 0x08CA }, { IMX415_HMAX, 0x07F0 }, { IMX415_LANEMODE, IMX415_LANEMODE_2 }, { IMX415_TCLKPOST, 0x006F }, @@ -463,7 +464,6 @@ static const struct cci_reg_sequence imx415_mode_2_720[] = { /* all-pixel 2-lane 1440 Mbps 30.01 Hz mode */ static const struct cci_reg_sequence imx415_mode_2_1440[] = { - { IMX415_VMAX, 0x08CA }, { IMX415_HMAX, 0x042A }, { IMX415_LANEMODE, IMX415_LANEMODE_2 }, { IMX415_TCLKPOST, 0x009F }, @@ -479,7 +479,6 @@ static const struct cci_reg_sequence imx415_mode_2_1440[] = { /* all-pixel 4-lane 891 Mbps 30 Hz mode */ static const struct cci_reg_sequence imx415_mode_4_891[] = { - { IMX415_VMAX, 0x08CA }, { IMX415_HMAX, 0x044C }, { IMX415_LANEMODE, IMX415_LANEMODE_4 }, { IMX415_TCLKPOST, 0x007F }, @@ -600,6 +599,7 @@ struct imx415 { struct v4l2_ctrl *vblank; struct v4l2_ctrl *hflip; struct v4l2_ctrl *vflip; + struct v4l2_ctrl *exposure; unsigned int cur_mode; unsigned int num_data_lanes; @@ -730,17 +730,38 @@ static int imx415_s_ctrl(struct v4l2_ctrl *ctrl) ctrls); const struct v4l2_mbus_framefmt *format; struct v4l2_subdev_state *state; + u32 exposure_max; unsigned int vmax; unsigned int flip; int ret; - if (!pm_runtime_get_if_in_use(sensor->dev)) - return 0; - state = v4l2_subdev_get_locked_active_state(&sensor->subdev); format = v4l2_subdev_state_get_format(state, 0); + if (ctrl->id == V4L2_CID_VBLANK) { + exposure_max = format->height + ctrl->val - + IMX415_EXPOSURE_OFFSET; + __v4l2_ctrl_modify_range(sensor->exposure, + sensor->exposure->minimum, + exposure_max, sensor->exposure->step, + sensor->exposure->default_value); + } + + if (!pm_runtime_get_if_in_use(sensor->dev)) + return 0; + switch (ctrl->id) { + case V4L2_CID_VBLANK: + ret = cci_write(sensor->regmap, IMX415_VMAX, + format->height + ctrl->val, NULL); + if (ret) + return ret; + /* + * Exposure is set based on VMAX which has just changed, so + * program exposure register as well + */ + ctrl = sensor->exposure; + fallthrough; case V4L2_CID_EXPOSURE: /* clamp the exposure value to VMAX. */ vmax = format->height + sensor->vblank->cur.val; @@ -787,7 +808,8 @@ static int imx415_ctrls_init(struct imx415 *sensor) u64 pixel_rate = supported_modes[sensor->cur_mode].pixel_rate; u64 lane_rate = supported_modes[sensor->cur_mode].lane_rate; u32 exposure_max = IMX415_PIXEL_ARRAY_HEIGHT + - IMX415_PIXEL_ARRAY_VBLANK - 8; + IMX415_PIXEL_ARRAY_VBLANK - + IMX415_EXPOSURE_OFFSET; u32 hblank; unsigned int i; int ret; @@ -816,8 +838,9 @@ static int imx415_ctrls_init(struct imx415 *sensor) if (ctrl) ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; - v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops, V4L2_CID_EXPOSURE, - 4, exposure_max, 1, exposure_max); + sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops, + V4L2_CID_EXPOSURE, 4, + exposure_max, 1, exposure_max); v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, IMX415_AGAIN_MIN, @@ -834,16 +857,9 @@ static int imx415_ctrls_init(struct imx415 *sensor) sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops, V4L2_CID_VBLANK, IMX415_PIXEL_ARRAY_VBLANK, - IMX415_PIXEL_ARRAY_VBLANK, 1, - IMX415_PIXEL_ARRAY_VBLANK); - if (sensor->vblank) - sensor->vblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + IMX415_VMAX_MAX - IMX415_PIXEL_ARRAY_HEIGHT, + 1, IMX415_PIXEL_ARRAY_VBLANK); - /* - * The pixel rate used here is a virtual value and can be used for - * calculating the frame rate together with hblank. It may not - * necessarily be the physically correct pixel clock. - */ v4l2_ctrl_new_std(&sensor->ctrls, NULL, V4L2_CID_PIXEL_RATE, pixel_rate, pixel_rate, 1, pixel_rate);