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Tue, 10 Mar 2020 06:46:08 -0700 (PDT) From: Robert Foss To: ben.kao@intel.com, mchehab@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, matthias.bgg@gmail.com, davem@davemloft.net, gregkh@linuxfoundation.org, Jonathan.Cameron@huawei.com, andriy.shevchenko@linux.intel.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Dongchun Zhu Subject: [v1 1/3] media: dt-bindings: ov8856: Document YAML bindings Date: Tue, 10 Mar 2020 14:46:01 +0100 Message-Id: <20200310134603.30260-2-robert.foss@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200310134603.30260-1-robert.foss@linaro.org> References: <20200310134603.30260-1-robert.foss@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200310_064610_655262_9B396168 X-CRM114-Status: GOOD ( 12.47 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:344 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Robert Foss , Tomasz Figa Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org From: Dongchun Zhu This patch adds documentation of device tree in YAML schema for the OV8856 CMOS image sensor. Signed-off-by: Dongchun Zhu Signed-off-by: Robert Foss --- - Changes since v3: * robher: Fix syntax error * robher: Removed maxItems * Fixes yaml 'make dt-binding-check' errors - Changes since v2: Fixes comments from from Andy, Tomasz, Sakari, Rob. * Convert text documentation to YAML schema. - Changes since v1: Fixes comments from Sakari, Tomasz * Add clock-frequency and link-frequencies in DT .../devicetree/bindings/media/i2c/ov8856.yaml | 129 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 130 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/ov8856.yaml diff --git a/Documentation/devicetree/bindings/media/i2c/ov8856.yaml b/Documentation/devicetree/bindings/media/i2c/ov8856.yaml new file mode 100644 index 000000000000..c8099ccab1d9 --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/ov8856.yaml @@ -0,0 +1,129 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (c) 2019 MediaTek Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/i2c/ov8856.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Omnivision OV8856 CMOS Sensor Device Tree Bindings + +maintainers: + - Ben Kao + - Dongchun Zhu + +description: |- + The Omnivision OV8856 is a high performance, 1/4-inch, 8 megapixel, CMOS + image sensor that delivers 3264x2448 at 30fps. It provides full-frame, + sub-sampled, and windowed 10-bit MIPI images in various formats via the + Serial Camera Control Bus (SCCB) interface. This chip is programmable + through I2C and two-wire SCCB. The sensor output is available via CSI-2 + serial data output (up to 4-lane). + +properties: + compatible: + const: ovti,ov8856 + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-names: + description: + Input clock for the sensor. + items: + - const: xvclk + + clock-frequency: + description: + Frequency of the xvclk clock in Hertz. + + dovdd-supply: + description: + Definition of the regulator used as interface power supply. + + avdd-supply: + description: + Definition of the regulator used as analog power supply. + + dvdd-supply: + description: + Definition of the regulator used as digital power supply. + + reset-gpios: + description: + The phandle and specifier for the GPIO that controls sensor reset. + + port: + type: object + additionalProperties: false + description: + A node containing input and output port nodes with endpoint definitions + as documented in + Documentation/devicetree/bindings/media/video-interfaces.txt + + properties: + endpoint: + type: object + + properties: + clock-lanes: + maxItems: 1 + + data-lanes: + maxItems: 1 + + remote-endpoint: true + + required: + - clock-lanes + - data-lanes + - remote-endpoint + + required: + - endpoint + +required: + - compatible + - reg + - clocks + - clock-names + - clock-frequency + - dovdd-supply + - avdd-supply + - dvdd-supply + - reset-gpios + - port + +additionalProperties: false + +examples: + - | + #include + + ov8856: camera-sensor@10 { + compatible = "ovti,ov8856"; + reg = <0x10>; + reset-gpios = <&pio 111 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&clk_24m_cam>; + + clocks = <&cru SCLK_TESTCLKOUT1>; + clock-names = "xvclk"; + clock-frequency = <19200000>; + + avdd-supply = <&mt6358_vcama2_reg>; + dvdd-supply = <&mt6358_vcamd_reg>; + dovdd-supply = <&mt6358_vcamio_reg>; + + port { + wcam_out: endpoint { + remote-endpoint = <&mipi_in_wcam>; + data-lanes = <1 2 3 4>; + link-frequencies = /bits/ 64 <360000000 180000000>; + }; + }; + }; + +... \ No newline at end of file diff --git a/MAINTAINERS b/MAINTAINERS index a6fbdf354d34..0f99e863978a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12355,6 +12355,7 @@ L: linux-media@vger.kernel.org T: git git://linuxtv.org/media_tree.git S: Maintained F: drivers/media/i2c/ov8856.c +F: Documentation/devicetree/bindings/media/i2c/ov8856.yaml OMNIVISION OV9650 SENSOR DRIVER M: Sakari Ailus From patchwork Tue Mar 10 13:46:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foss X-Patchwork-Id: 11429481 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EE97B139A for ; 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Tue, 10 Mar 2020 06:46:10 -0700 (PDT) Received: from xps7590.local ([2a02:2450:102f:13b8:e50c:c780:9a1:8b61]) by smtp.gmail.com with ESMTPSA id d63sm4074009wmd.44.2020.03.10.06.46.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 06:46:09 -0700 (PDT) From: Robert Foss To: ben.kao@intel.com, mchehab@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, matthias.bgg@gmail.com, davem@davemloft.net, gregkh@linuxfoundation.org, Jonathan.Cameron@huawei.com, andriy.shevchenko@linux.intel.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Dongchun Zhu Subject: [v1 2/3] media: ov8856: Add devicetree support Date: Tue, 10 Mar 2020 14:46:02 +0100 Message-Id: <20200310134603.30260-3-robert.foss@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200310134603.30260-1-robert.foss@linaro.org> References: <20200310134603.30260-1-robert.foss@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200310_064611_836648_3C4BF899 X-CRM114-Status: GOOD ( 15.91 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:342 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Robert Foss , Tomasz Figa Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Add devicetree match table, and enable ov8856_probe() to initialize power, clocks and reset pins. Signed-off-by: Robert Foss --- drivers/media/i2c/ov8856.c | 105 ++++++++++++++++++++++++++++++++++++- 1 file changed, 103 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 8655842af275..1769acdfaa44 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -3,10 +3,13 @@ #include #include +#include #include +#include #include #include #include +#include #include #include #include @@ -19,6 +22,8 @@ #define OV8856_LINK_FREQ_180MHZ 180000000ULL #define OV8856_SCLK 144000000ULL #define OV8856_MCLK 19200000 +#define OV8856_XVCLK_19_2 19200000 +#define OV8856_XVCLK_24 24000000 #define OV8856_DATA_LANES 4 #define OV8856_RGB_DEPTH 10 @@ -64,6 +69,14 @@ #define to_ov8856(_sd) container_of(_sd, struct ov8856, sd) +static const char * const ov8856_supply_names[] = { + "dovdd", /* Digital I/O power */ + "avdd", /* Analog power */ + "dvdd", /* Digital core power */ +}; + +#define OV8856_NUM_SUPPLIES ARRAY_SIZE(ov8856_supply_names) + enum { OV8856_LINK_FREQ_720MBPS, OV8856_LINK_FREQ_360MBPS, @@ -566,6 +579,10 @@ struct ov8856 { struct media_pad pad; struct v4l2_ctrl_handler ctrl_handler; + struct clk *xvclk; + struct gpio_desc *n_shutdn_gpio; + struct regulator_bulk_data supplies[OV8856_NUM_SUPPLIES]; + /* V4L2 Controls */ struct v4l2_ctrl *link_freq; struct v4l2_ctrl *pixel_rate; @@ -908,6 +925,45 @@ static int ov8856_set_stream(struct v4l2_subdev *sd, int enable) return ret; } +static int __ov8856_power_on(struct ov8856 *ov8856) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + int ret; + + ret = clk_prepare_enable(ov8856->xvclk); + if (ret < 0) { + dev_err(&client->dev, "failed to enable xvclk\n"); + return ret; + } + + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_LOW); + + ret = regulator_bulk_enable(OV8856_NUM_SUPPLIES, ov8856->supplies); + if (ret < 0) { + dev_err(&client->dev, "failed to enable regulators\n"); + goto disable_clk; + } + + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_HIGH); + + usleep_range(1500, 1800); + + return 0; + +disable_clk: + clk_disable_unprepare(ov8856->xvclk); + + return ret; +} + +static void __ov8856_power_off(struct ov8856 *ov8856) +{ + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_LOW); + regulator_bulk_disable(OV8856_NUM_SUPPLIES, ov8856->supplies); + clk_disable_unprepare(ov8856->xvclk); +} + + static int __maybe_unused ov8856_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -1175,7 +1231,7 @@ static int ov8856_remove(struct i2c_client *client) static int ov8856_probe(struct i2c_client *client) { struct ov8856 *ov8856; - int ret; + int i, ret; ret = ov8856_check_hwcfg(&client->dev); if (ret) { @@ -1189,10 +1245,45 @@ static int ov8856_probe(struct i2c_client *client) return -ENOMEM; v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops); + ov8856->xvclk = devm_clk_get(&client->dev, "xvclk"); + if (IS_ERR(ov8856->xvclk)) { + dev_err(&client->dev, "failed to get xvclk\n"); + return -EINVAL; + } + + ret = clk_set_rate(ov8856->xvclk, OV8856_XVCLK_24); + if (ret < 0) { + dev_err(&client->dev, "failed to set xvclk rate (24MHz)\n"); + return ret; + } + + ov8856->n_shutdn_gpio = devm_gpiod_get(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ov8856->n_shutdn_gpio)) { + dev_err(&client->dev, "failed to get reset-gpios\n"); + return -EINVAL; + } + + for (i = 0; i < OV8856_NUM_SUPPLIES; i++) + ov8856->supplies[i].supply = ov8856_supply_names[i]; + + ret = devm_regulator_bulk_get(&client->dev, OV8856_NUM_SUPPLIES, + ov8856->supplies); + if (ret) { + dev_warn(&client->dev, "failed to get regulators\n"); + return ret; + } + + ret = __ov8856_power_on(ov8856); + if (ret) { + dev_warn(&client->dev, "failed to power on\n"); + return ret; + } + ret = ov8856_identify_module(ov8856); if (ret) { dev_err(&client->dev, "failed to find sensor: %d", ret); - return ret; + goto probe_power_off; } mutex_init(&ov8856->mutex); @@ -1238,6 +1329,9 @@ static int ov8856_probe(struct i2c_client *client) v4l2_ctrl_handler_free(ov8856->sd.ctrl_handler); mutex_destroy(&ov8856->mutex); +probe_power_off: + __ov8856_power_off(ov8856); + return ret; } @@ -1254,11 +1348,18 @@ static const struct acpi_device_id ov8856_acpi_ids[] = { MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids); #endif +static const struct of_device_id ov8856_of_match[] = { + { .compatible = "ovti,ov8856" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ov8856_of_match); + static struct i2c_driver ov8856_i2c_driver = { .driver = { .name = "ov8856", .pm = &ov8856_pm_ops, .acpi_match_table = ACPI_PTR(ov8856_acpi_ids), + .of_match_table = ov8856_of_match, }, .probe_new = ov8856_probe, .remove = ov8856_remove, From patchwork Tue Mar 10 13:46:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foss X-Patchwork-Id: 11429489 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 64D3D139A for ; Tue, 10 Mar 2020 13:47:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3F44220637 for ; 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Tue, 10 Mar 2020 06:46:11 -0700 (PDT) Received: from xps7590.local ([2a02:2450:102f:13b8:e50c:c780:9a1:8b61]) by smtp.gmail.com with ESMTPSA id d63sm4074009wmd.44.2020.03.10.06.46.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 06:46:11 -0700 (PDT) From: Robert Foss To: ben.kao@intel.com, mchehab@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, matthias.bgg@gmail.com, davem@davemloft.net, gregkh@linuxfoundation.org, Jonathan.Cameron@huawei.com, andriy.shevchenko@linux.intel.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Dongchun Zhu Subject: [v1 3/3] media: ov8856: Implement sensor module revision identification Date: Tue, 10 Mar 2020 14:46:03 +0100 Message-Id: <20200310134603.30260-4-robert.foss@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200310134603.30260-1-robert.foss@linaro.org> References: <20200310134603.30260-1-robert.foss@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200310_064612_838028_D9F316C8 X-CRM114-Status: GOOD ( 11.05 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:343 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Robert Foss , Tomasz Figa Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Query the sensor for its module revision, and compare it to known revisions. Currently only the '1B' revision has been added. Signed-off-by: Robert Foss --- drivers/media/i2c/ov8856.c | 48 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 1769acdfaa44..48e8f4b997d6 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -34,6 +34,18 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* define 1B module revision */ +#define OV8856_1B_MODULE 0x02 + +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset + * of the byte in the OTP that means the module revision + */ +#define OV8856_MODULE_REVISION 0x700f +#define OV8856_OTP_MODE_CTRL 0x3d84 +#define OV8856_OTP_LOAD_CTRL 0x3d81 +#define OV8856_OTP_MODE_AUTO 0x00 +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) + /* vertical-timings from sensor */ #define OV8856_REG_VTS 0x380e #define OV8856_VTS_MAX 0x7fff @@ -713,6 +725,25 @@ static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern) OV8856_REG_VALUE_08BIT, pattern); } +static int ov8856_check_revision(struct ov8856 *ov8856) +{ + int ret; + + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); + if (ret) + return ret; + + return ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, + OV8856_REG_VALUE_08BIT, + OV8856_OTP_LOAD_CTRL_ENABLE); +} + static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl) { struct ov8856 *ov8856 = container_of(ctrl->handler, @@ -1145,6 +1176,23 @@ static int ov8856_identify_module(struct ov8856 *ov8856) return -ENXIO; } + /* check sensor hardware revision */ + ret = ov8856_check_revision(ov8856); + if (ret) { + dev_err(&client->dev, "failed to check sensor revision"); + return ret; + } + + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, + OV8856_REG_VALUE_08BIT, &val); + if (ret) + return ret; + + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", + val, + val == OV8856_1B_MODULE ? "1B" : "unknown revision", + client->addr); + return 0; }