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At the moment, this is hardcoded to 7 (the fastest rate). The user might want to change this values due to EMC requirements. Add the 'pad-slew-rate' property to the MT9M114 DT-bindings for selecting the desired slew rate. Signed-off-by: Mathis Foerst --- .../devicetree/bindings/media/i2c/onnn,mt9m114.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml b/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml index 72e258d57186..666afe10c538 100644 --- a/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml +++ b/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml @@ -74,6 +74,12 @@ properties: description: Bypass the internal PLL of the sensor to use EXTCLK directly as SYSCLK. type: boolean + onnn,slew-rate: + $ref: /schemas/types.yaml#/definitions/uint8 + description: Slew rate ot the output pads DOUT[7:0], LINE_VALID, FRAME_VALID and PIXCLK + minimum: 0 + maximum: 7 + required: - compatible - reg From patchwork Wed Feb 26 15:39:25 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathis Foerst X-Patchwork-Id: 868781 Received: from EUR05-VI1-obe.outbound.protection.outlook.com (mail-vi1eur05on2089.outbound.protection.outlook.com [40.107.21.89]) (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 BA7A4223330; 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It also has the option to bypass the PLL and use EXTCLK directly as SYSCLK. The current driver implementation uses a hardcoded PLL configuration that requires a specific EXTCLK frequency. Depending on the available clocks, it can be desirable to use a different PLL configuration or to bypass it. Read the property 'bypass-pll' from the DT in mt9m114_parse_dt(). Depending on this value, write the correct PLL register values and calculate the correct pixel clock value. Signed-off-by: Mathis Foerst --- drivers/media/i2c/mt9m114.c | 33 ++++++++++++++++++++++++--------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c index fa64d6d315a1..edbc0447141d 100644 --- a/drivers/media/i2c/mt9m114.c +++ b/drivers/media/i2c/mt9m114.c @@ -261,6 +261,7 @@ #define MT9M114_CAM_PGA_PGA_CONTROL CCI_REG16(0xc95e) #define MT9M114_CAM_SYSCTL_PLL_ENABLE CCI_REG8(0xc97e) #define MT9M114_CAM_SYSCTL_PLL_ENABLE_VALUE BIT(0) +#define MT9M114_CAM_SYSCTL_PLL_DISABLE_VALUE 0x00 #define MT9M114_CAM_SYSCTL_PLL_DIVIDER_M_N CCI_REG16(0xc980) #define MT9M114_CAM_SYSCTL_PLL_DIVIDER_VALUE(m, n) (((n) << 8) | (m)) #define MT9M114_CAM_SYSCTL_PLL_DIVIDER_P CCI_REG16(0xc982) @@ -377,6 +378,7 @@ struct mt9m114 { struct gpio_desc *reset; struct regulator_bulk_data supplies[3]; struct v4l2_fwnode_endpoint bus_cfg; + bool bypass_pll; struct { unsigned int m; @@ -743,14 +745,20 @@ static int mt9m114_initialize(struct mt9m114 *sensor) } /* Configure the PLL. */ - cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_ENABLE, - MT9M114_CAM_SYSCTL_PLL_ENABLE_VALUE, &ret); - cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_DIVIDER_M_N, - MT9M114_CAM_SYSCTL_PLL_DIVIDER_VALUE(sensor->pll.m, - sensor->pll.n), - &ret); - cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_DIVIDER_P, - MT9M114_CAM_SYSCTL_PLL_DIVIDER_P_VALUE(sensor->pll.p), &ret); + if (sensor->bypass_pll) { + cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_ENABLE, + MT9M114_CAM_SYSCTL_PLL_DISABLE_VALUE, &ret); + } else { + cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_ENABLE, + MT9M114_CAM_SYSCTL_PLL_ENABLE_VALUE, &ret); + cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_DIVIDER_M_N, + MT9M114_CAM_SYSCTL_PLL_DIVIDER_VALUE(sensor->pll.m, + sensor->pll.n), + &ret); + cci_write(sensor->regmap, MT9M114_CAM_SYSCTL_PLL_DIVIDER_P, + MT9M114_CAM_SYSCTL_PLL_DIVIDER_P_VALUE(sensor->pll.p), + &ret); + } cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_PIXCLK, sensor->pixrate, &ret); @@ -2268,8 +2276,12 @@ static int mt9m114_clk_init(struct mt9m114 *sensor) * for 16-bit per pixel, transmitted in DDR over a single lane. For * parallel mode, the sensor ouputs one pixel in two PIXCLK cycles. */ - sensor->pixrate = clk_get_rate(sensor->clk) * sensor->pll.m + if (sensor->bypass_pll) { + sensor->pixrate = clk_get_rate(sensor->clk) / 2; + } else { + sensor->pixrate = clk_get_rate(sensor->clk) * sensor->pll.m / ((sensor->pll.n + 1) * (sensor->pll.p + 1)); + } link_freq = sensor->bus_cfg.bus_type == V4L2_MBUS_CSI2_DPHY ? sensor->pixrate * 8 : sensor->pixrate * 2; @@ -2321,6 +2333,7 @@ static int mt9m114_parse_dt(struct mt9m114 *sensor) { struct fwnode_handle *fwnode = dev_fwnode(&sensor->client->dev); struct fwnode_handle *ep; + struct device_node *dev_node = sensor->client->dev.of_node; int ret; ep = fwnode_graph_get_next_endpoint(fwnode, NULL); @@ -2349,6 +2362,8 @@ static int mt9m114_parse_dt(struct mt9m114 *sensor) goto error; } + sensor->bypass_pll = of_property_read_bool(dev_node, "bypass-pll"); + return 0; error: From patchwork Wed Feb 26 15:39:26 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathis Foerst X-Patchwork-Id: 868780 Received: from EUR05-VI1-obe.outbound.protection.outlook.com (mail-vi1eur05on2089.outbound.protection.outlook.com [40.107.21.89]) (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 F01303209; 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This is undesirable if only the config of the pa should be changed without affecting the ifp. Factor out the function mt9m114_configure_pa() that just writes the pa-configuration. Signed-off-by: Mathis Foerst --- drivers/media/i2c/mt9m114.c | 49 +++++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 19 deletions(-) diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c index edbc0447141d..a1976da74c08 100644 --- a/drivers/media/i2c/mt9m114.c +++ b/drivers/media/i2c/mt9m114.c @@ -789,39 +789,22 @@ static int mt9m114_initialize(struct mt9m114 *sensor) return 0; } -static int mt9m114_configure(struct mt9m114 *sensor, - struct v4l2_subdev_state *pa_state, - struct v4l2_subdev_state *ifp_state) +static int mt9m114_configure_pa(struct mt9m114 *sensor, struct v4l2_subdev_state *pa_state) { const struct v4l2_mbus_framefmt *pa_format; const struct v4l2_rect *pa_crop; - const struct mt9m114_format_info *ifp_info; - const struct v4l2_mbus_framefmt *ifp_format; - const struct v4l2_rect *ifp_crop; - const struct v4l2_rect *ifp_compose; - unsigned int hratio, vratio; - u64 output_format; u64 read_mode; + unsigned int hratio, vratio; int ret = 0; pa_format = v4l2_subdev_state_get_format(pa_state, 0); pa_crop = v4l2_subdev_state_get_crop(pa_state, 0); - ifp_format = v4l2_subdev_state_get_format(ifp_state, 1); - ifp_info = mt9m114_format_info(sensor, 1, ifp_format->code); - ifp_crop = v4l2_subdev_state_get_crop(ifp_state, 0); - ifp_compose = v4l2_subdev_state_get_compose(ifp_state, 0); - ret = cci_read(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE, &read_mode, NULL); if (ret < 0) return ret; - ret = cci_read(sensor->regmap, MT9M114_CAM_OUTPUT_FORMAT, - &output_format, NULL); - if (ret < 0) - return ret; - hratio = pa_crop->width / pa_format->width; vratio = pa_crop->height / pa_format->height; @@ -853,6 +836,34 @@ static int mt9m114_configure(struct mt9m114 *sensor, cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE, read_mode, &ret); + return ret; +} + +static int mt9m114_configure(struct mt9m114 *sensor, + struct v4l2_subdev_state *pa_state, + struct v4l2_subdev_state *ifp_state) +{ + const struct mt9m114_format_info *ifp_info; + const struct v4l2_mbus_framefmt *ifp_format; + const struct v4l2_rect *ifp_crop; + const struct v4l2_rect *ifp_compose; + u64 output_format; + int ret = 0; + + ifp_format = v4l2_subdev_state_get_format(ifp_state, 1); + ifp_info = mt9m114_format_info(sensor, 1, ifp_format->code); + ifp_crop = v4l2_subdev_state_get_crop(ifp_state, 0); + ifp_compose = v4l2_subdev_state_get_compose(ifp_state, 0); + + ret = cci_read(sensor->regmap, MT9M114_CAM_OUTPUT_FORMAT, + &output_format, NULL); + if (ret < 0) + return ret; + + ret = mt9m114_configure_pa(sensor, pa_state); + if (ret < 0) + return ret; + /* * Color pipeline (IFP) cropping and scaling. 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The user has to stop and restart the stream for the changes to be applied. The same holds for changes to the V4L2 controls HFLIP & VFLIP. This can be undesirable e.g. in a calibration usecase where the user wants to see the impact of his changes in a live video stream. Call mt9m114_configure_pa() in mt9m114_pa_set_selection() if the sensor is in streaming state and issue a CONFIG_CHANGE to apply the changes immediately. Issue a CONFIG_CHANGE when the V4L2 controls HFLIP or VFLIP are set if the sensor is in streaming state to apply the change immediately. Signed-off-by: Mathis Foerst --- drivers/media/i2c/mt9m114.c | 32 +++++++++++++++++++++++++++++--- 1 file changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c index a1976da74c08..5c0a8a940fd2 100644 --- a/drivers/media/i2c/mt9m114.c +++ b/drivers/media/i2c/mt9m114.c @@ -1098,6 +1098,13 @@ static int mt9m114_pa_s_ctrl(struct v4l2_ctrl *ctrl) ret = cci_update_bits(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE, mask, ctrl->val ? mask : 0, NULL); + if (ret) + return ret; + if (sensor->streaming) { + // Changing the flip config while streaming requires a CONFIG_CHANGE + ret = mt9m114_set_state(sensor, + MT9M114_SYS_STATE_ENTER_CONFIG_CHANGE); + } break; case V4L2_CID_VFLIP: @@ -1105,6 +1112,13 @@ static int mt9m114_pa_s_ctrl(struct v4l2_ctrl *ctrl) ret = cci_update_bits(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE, mask, ctrl->val ? mask : 0, NULL); + if (ret) + return ret; + if (sensor->streaming) { + // Changing the flip config while streaming requires a CONFIG_CHANGE + ret = mt9m114_set_state(sensor, + MT9M114_SYS_STATE_ENTER_CONFIG_CHANGE); + } break; default: @@ -1286,6 +1300,7 @@ static int mt9m114_pa_set_selection(struct v4l2_subdev *sd, struct mt9m114 *sensor = pa_to_mt9m114(sd); struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; + int ret = 0; if (sel->target != V4L2_SEL_TGT_CROP) return -EINVAL; @@ -1316,10 +1331,21 @@ static int mt9m114_pa_set_selection(struct v4l2_subdev *sd, format->width = crop->width; format->height = crop->height; - if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) - mt9m114_pa_ctrl_update_blanking(sensor, format); + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) + return ret; - return 0; + mt9m114_pa_ctrl_update_blanking(sensor, format); + + /* Apply values immediately if streaming */ + if (sensor->streaming) { + ret = mt9m114_configure_pa(sensor, state); + if (ret) + return ret; + // Changing the cropping config requires a CONFIG_CHANGE + ret = mt9m114_set_state(sensor, MT9M114_SYS_STATE_ENTER_CONFIG_CHANGE); + } + + return ret; } static const struct v4l2_subdev_pad_ops mt9m114_pa_pad_ops = {