From patchwork Mon Jan 3 16:24:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 12702633 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AE51C433FE for ; Mon, 3 Jan 2022 16:24:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234451AbiACQYb (ORCPT ); Mon, 3 Jan 2022 11:24:31 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:56406 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234320AbiACQYa (ORCPT ); Mon, 3 Jan 2022 11:24:30 -0500 Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id B7536CC; Mon, 3 Jan 2022 17:24:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1641227069; bh=IWVL94j/oRTqBTrmtmHvUj7uL5FFtisA9dMR1ZaeuM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DjEXrsPcRm3/Eqy4kIeMdAhtQ+xeokm440u1+JBek5otL3zGEIi0EdlBjge7e2/ze AySPjJprFo4Oq0QLzdVXWKKCrrhVmSs+ULIGNWL7+YdGkmVvddQ/mMmDlCQmlMRfIO vWWgjJoqGmquBbxltGWizI7b7Q4yI4xmuLnBWSRQ= From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Sakari Ailus , Hans Verkuil , Kieran Bingham , Jacopo Mondi , =?utf-8?q?Niklas_S=C3=B6derlund?= , Tomi Valkeinen , Janusz Krzysztofik , Mats Randgaard , Robert Foss , Hugues Fruchet , Maxime Ripard , Rui Miguel Silva , Steve Longerbeam , Philipp Zabel , Shawn Guo , Sascha Hauer Subject: [RFC PATCH 4/8] media: v4l2-fwnode: Move bus config structure to v4l2_mediabus.h Date: Mon, 3 Jan 2022 18:24:10 +0200 Message-Id: <20220103162414.27723-5-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220103162414.27723-1-laurent.pinchart+renesas@ideasonboard.com> References: <20220103162414.27723-1-laurent.pinchart+renesas@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org To prepare for usage of the v4l2_fwnode_bus_* data structures to describe bus configuration in the subdev .get_mbus_config() operation, rename the structures with a v4l2_mbus_config_ prefix instead of v4l2_fwnode_bus_, and move them to v4l2_mediabus.h. Signed-off-by: Laurent Pinchart --- drivers/media/i2c/ov5648.c | 4 +- drivers/media/i2c/ov8865.c | 4 +- drivers/media/i2c/tc358743.c | 2 +- drivers/media/platform/qcom/camss/camss.c | 2 +- drivers/media/platform/rcar-vin/rcar-vin.h | 2 +- drivers/media/platform/stm32/stm32-dcmi.c | 2 +- .../platform/sunxi/sun4i-csi/sun4i_csi.h | 2 +- .../platform/sunxi/sun4i-csi/sun4i_dma.c | 2 +- drivers/media/platform/ti-vpe/cal-camerarx.c | 6 +- drivers/media/v4l2-core/v4l2-fwnode.c | 12 ++-- drivers/staging/media/imx/imx7-mipi-csis.c | 2 +- drivers/staging/media/imx/imx8mq-mipi-csi2.c | 2 +- drivers/staging/media/max96712/max96712.c | 2 +- include/media/v4l2-fwnode.h | 61 ++----------------- include/media/v4l2-mediabus.h | 49 +++++++++++++++ 15 files changed, 77 insertions(+), 77 deletions(-) diff --git a/drivers/media/i2c/ov5648.c b/drivers/media/i2c/ov5648.c index 947d437ed0ef..87f9b724cd7f 100644 --- a/drivers/media/i2c/ov5648.c +++ b/drivers/media/i2c/ov5648.c @@ -1112,7 +1112,7 @@ static int ov5648_pad_configure(struct ov5648_sensor *sensor) static int ov5648_mipi_configure(struct ov5648_sensor *sensor) { - struct v4l2_fwnode_bus_mipi_csi2 *bus_mipi_csi2 = + struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 = &sensor->endpoint.bus.mipi_csi2; unsigned int lanes_count = bus_mipi_csi2->num_data_lanes; int ret; @@ -1692,7 +1692,7 @@ static int ov5648_state_mipi_configure(struct ov5648_sensor *sensor, u32 mbus_code) { struct ov5648_ctrls *ctrls = &sensor->ctrls; - struct v4l2_fwnode_bus_mipi_csi2 *bus_mipi_csi2 = + struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 = &sensor->endpoint.bus.mipi_csi2; unsigned long mipi_clk_rate; unsigned int bits_per_sample; diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c index d9d016cfa9ac..2b18d8e54098 100644 --- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -1471,7 +1471,7 @@ static int ov8865_charge_pump_configure(struct ov8865_sensor *sensor) static int ov8865_mipi_configure(struct ov8865_sensor *sensor) { - struct v4l2_fwnode_bus_mipi_csi2 *bus_mipi_csi2 = + struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 = &sensor->endpoint.bus.mipi_csi2; unsigned int lanes_count = bus_mipi_csi2->num_data_lanes; int ret; @@ -2241,7 +2241,7 @@ static int ov8865_state_mipi_configure(struct ov8865_sensor *sensor, u32 mbus_code) { struct ov8865_ctrls *ctrls = &sensor->ctrls; - struct v4l2_fwnode_bus_mipi_csi2 *bus_mipi_csi2 = + struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 = &sensor->endpoint.bus.mipi_csi2; unsigned long mipi_clk_rate; unsigned int bits_per_sample; diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c index 3205cd8298dd..40512004afba 100644 --- a/drivers/media/i2c/tc358743.c +++ b/drivers/media/i2c/tc358743.c @@ -69,7 +69,7 @@ static const struct v4l2_dv_timings_cap tc358743_timings_cap = { struct tc358743_state { struct tc358743_platform_data pdata; - struct v4l2_fwnode_bus_mipi_csi2 bus; + struct v4l2_mbus_config_mipi_csi2 bus; struct v4l2_subdev sd; struct media_pad pad; struct v4l2_ctrl_handler hdl; diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index be091c50a3c0..76bd3d4eabb6 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -832,7 +832,7 @@ static int camss_of_parse_endpoint_node(struct device *dev, struct camss_async_subdev *csd) { struct csiphy_lanes_cfg *lncfg = &csd->interface.csi2.lane_cfg; - struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2; + struct v4l2_mbus_config_mipi_csi2 *mipi_csi2; struct v4l2_fwnode_endpoint vep = { { 0 } }; unsigned int i; diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h index 6c06320174a2..7e86e35ca42b 100644 --- a/drivers/media/platform/rcar-vin/rcar-vin.h +++ b/drivers/media/platform/rcar-vin/rcar-vin.h @@ -118,7 +118,7 @@ struct rvin_parallel_entity { struct v4l2_subdev *subdev; enum v4l2_mbus_type mbus_type; - struct v4l2_fwnode_bus_parallel bus; + struct v4l2_mbus_config_parallel bus; unsigned int source_pad; unsigned int sink_pad; diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c index e1b17c05229c..7694ffef5c00 100644 --- a/drivers/media/platform/stm32/stm32-dcmi.c +++ b/drivers/media/platform/stm32/stm32-dcmi.c @@ -150,7 +150,7 @@ struct stm32_dcmi { struct mutex lock; struct vb2_queue queue; - struct v4l2_fwnode_bus_parallel bus; + struct v4l2_mbus_config_parallel bus; enum v4l2_mbus_type bus_type; struct completion complete; struct clk *mclk; diff --git a/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h b/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h index a5f61ee0ec4d..8eeed87bfb13 100644 --- a/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h +++ b/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h @@ -124,7 +124,7 @@ struct sun4i_csi { dma_addr_t paddr; } scratch; - struct v4l2_fwnode_bus_parallel bus; + struct v4l2_mbus_config_parallel bus; /* Main Device */ struct v4l2_device v4l; diff --git a/drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c b/drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c index 2c39cd7f2862..0912a1b6d525 100644 --- a/drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c +++ b/drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c @@ -226,7 +226,7 @@ static void return_all_buffers(struct sun4i_csi *csi, static int sun4i_csi_start_streaming(struct vb2_queue *vq, unsigned int count) { struct sun4i_csi *csi = vb2_get_drv_priv(vq); - struct v4l2_fwnode_bus_parallel *bus = &csi->bus; + struct v4l2_mbus_config_parallel *bus = &csi->bus; const struct sun4i_csi_format *csi_fmt; unsigned long href_pol, pclk_pol, vref_pol; unsigned long flags; diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c index 4bf7a8c2e711..6b43a1525b45 100644 --- a/drivers/media/platform/ti-vpe/cal-camerarx.c +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c @@ -47,7 +47,7 @@ static inline void camerarx_write(struct cal_camerarx *phy, u32 offset, u32 val) static s64 cal_camerarx_get_ext_link_freq(struct cal_camerarx *phy) { - struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; + struct v4l2_mbus_config_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; u32 num_lanes = mipi_csi2->num_data_lanes; const struct cal_format_info *fmtinfo; u32 bpp; @@ -76,7 +76,7 @@ static void cal_camerarx_lane_config(struct cal_camerarx *phy) u32 val = cal_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance)); u32 lane_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POSITION_MASK; u32 polarity_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POL_MASK; - struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = + struct v4l2_mbus_config_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; int lane; @@ -518,7 +518,7 @@ static int cal_camerarx_regmap_init(struct cal_dev *cal, static int cal_camerarx_parse_dt(struct cal_camerarx *phy) { struct v4l2_fwnode_endpoint *endpoint = &phy->endpoint; - char data_lanes[V4L2_FWNODE_CSI2_MAX_DATA_LANES * 2]; + char data_lanes[V4L2_MBUS_CSI2_MAX_DATA_LANES * 2]; struct device_node *ep_node; unsigned int i; int ret; diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index 00457e1e93f6..9ff3ebb230e7 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -119,11 +119,11 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep, enum v4l2_mbus_type bus_type) { - struct v4l2_fwnode_bus_mipi_csi2 *bus = &vep->bus.mipi_csi2; + struct v4l2_mbus_config_mipi_csi2 *bus = &vep->bus.mipi_csi2; bool have_clk_lane = false, have_data_lanes = false, have_lane_polarities = false; unsigned int flags = 0, lanes_used = 0; - u32 array[1 + V4L2_FWNODE_CSI2_MAX_DATA_LANES]; + u32 array[1 + V4L2_MBUS_CSI2_MAX_DATA_LANES]; u32 clock_lane = 0; unsigned int num_data_lanes = 0; bool use_default_lane_mapping = false; @@ -136,7 +136,7 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode, use_default_lane_mapping = true; num_data_lanes = min_t(u32, bus->num_data_lanes, - V4L2_FWNODE_CSI2_MAX_DATA_LANES); + V4L2_MBUS_CSI2_MAX_DATA_LANES); clock_lane = bus->clock_lane; if (clock_lane) @@ -155,7 +155,7 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode, rval = fwnode_property_count_u32(fwnode, "data-lanes"); if (rval > 0) { num_data_lanes = - min_t(int, V4L2_FWNODE_CSI2_MAX_DATA_LANES, rval); + min_t(int, V4L2_MBUS_CSI2_MAX_DATA_LANES, rval); fwnode_property_read_u32_array(fwnode, "data-lanes", array, num_data_lanes); @@ -263,7 +263,7 @@ v4l2_fwnode_endpoint_parse_parallel_bus(struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep, enum v4l2_mbus_type bus_type) { - struct v4l2_fwnode_bus_parallel *bus = &vep->bus.parallel; + struct v4l2_mbus_config_parallel *bus = &vep->bus.parallel; unsigned int flags = 0; u32 v; @@ -369,7 +369,7 @@ v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep, enum v4l2_mbus_type bus_type) { - struct v4l2_fwnode_bus_mipi_csi1 *bus = &vep->bus.mipi_csi1; + struct v4l2_mbus_config_mipi_csi1 *bus = &vep->bus.mipi_csi1; u32 v; if (!fwnode_property_read_u32(fwnode, "clock-inv", &v)) { diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index 2b73fa55c938..b7afa5351634 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -318,7 +318,7 @@ struct csi_state { struct v4l2_async_notifier notifier; struct v4l2_subdev *src_sd; - struct v4l2_fwnode_bus_mipi_csi2 bus; + struct v4l2_mbus_config_mipi_csi2 bus; u32 clk_frequency; u32 hs_settle; u32 clk_settle; diff --git a/drivers/staging/media/imx/imx8mq-mipi-csi2.c b/drivers/staging/media/imx/imx8mq-mipi-csi2.c index 7adbdd14daa9..5facf1b140a3 100644 --- a/drivers/staging/media/imx/imx8mq-mipi-csi2.c +++ b/drivers/staging/media/imx/imx8mq-mipi-csi2.c @@ -117,7 +117,7 @@ struct csi_state { struct v4l2_async_notifier notifier; struct v4l2_subdev *src_sd; - struct v4l2_fwnode_bus_mipi_csi2 bus; + struct v4l2_mbus_config_mipi_csi2 bus; struct mutex lock; /* Protect csi2_fmt, format_mbus, state, hs_settle */ const struct csi2_pix_format *csi2_fmt; diff --git a/drivers/staging/media/max96712/max96712.c b/drivers/staging/media/max96712/max96712.c index 9bc72d9a858b..6b5abd958bff 100644 --- a/drivers/staging/media/max96712/max96712.c +++ b/drivers/staging/media/max96712/max96712.c @@ -30,7 +30,7 @@ struct max96712_priv { struct regmap *regmap; struct gpio_desc *gpiod_pwdn; - struct v4l2_fwnode_bus_mipi_csi2 mipi; + struct v4l2_mbus_config_mipi_csi2 mipi; struct v4l2_subdev sd; struct v4l2_ctrl_handler ctrl_handler; diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index 9c97f1dbd1c6..feb132df45a3 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -25,68 +25,19 @@ struct fwnode_handle; struct v4l2_async_notifier; struct v4l2_async_subdev; -#define V4L2_FWNODE_CSI2_MAX_DATA_LANES 8 - -/** - * struct v4l2_fwnode_bus_mipi_csi2 - MIPI CSI-2 bus data structure - * @flags: media bus (V4L2_MBUS_*) flags - * @data_lanes: an array of physical data lane indexes - * @clock_lane: physical lane index of the clock lane - * @num_data_lanes: number of data lanes - * @lane_polarities: polarity of the lanes. The order is the same of - * the physical lanes. - */ -struct v4l2_fwnode_bus_mipi_csi2 { - unsigned int flags; - unsigned char data_lanes[V4L2_FWNODE_CSI2_MAX_DATA_LANES]; - unsigned char clock_lane; - unsigned char num_data_lanes; - bool lane_polarities[1 + V4L2_FWNODE_CSI2_MAX_DATA_LANES]; -}; - -/** - * struct v4l2_fwnode_bus_parallel - parallel data bus data structure - * @flags: media bus (V4L2_MBUS_*) flags - * @bus_width: bus width in bits - * @data_shift: data shift in bits - */ -struct v4l2_fwnode_bus_parallel { - unsigned int flags; - unsigned char bus_width; - unsigned char data_shift; -}; - -/** - * struct v4l2_fwnode_bus_mipi_csi1 - CSI-1/CCP2 data bus structure - * @clock_inv: polarity of clock/strobe signal - * false - not inverted, true - inverted - * @strobe: false - data/clock, true - data/strobe - * @lane_polarity: the polarities of the clock (index 0) and data lanes - * index (1) - * @data_lane: the number of the data lane - * @clock_lane: the number of the clock lane - */ -struct v4l2_fwnode_bus_mipi_csi1 { - unsigned char clock_inv:1; - unsigned char strobe:1; - bool lane_polarity[2]; - unsigned char data_lane; - unsigned char clock_lane; -}; - /** * struct v4l2_fwnode_endpoint - the endpoint data structure * @base: fwnode endpoint of the v4l2_fwnode * @bus_type: bus type * @bus: bus configuration data structure - * @bus.parallel: embedded &struct v4l2_fwnode_bus_parallel. + * @bus.parallel: embedded &struct v4l2_mbus_config_parallel. * Used if the bus is parallel. - * @bus.mipi_csi1: embedded &struct v4l2_fwnode_bus_mipi_csi1. + * @bus.mipi_csi1: embedded &struct v4l2_mbus_config_mipi_csi1. * Used if the bus is MIPI Alliance's Camera Serial * Interface version 1 (MIPI CSI1) or Standard * Mobile Imaging Architecture's Compact Camera Port 2 * (SMIA CCP2). - * @bus.mipi_csi2: embedded &struct v4l2_fwnode_bus_mipi_csi2. + * @bus.mipi_csi2: embedded &struct v4l2_mbus_config_mipi_csi2. * Used if the bus is MIPI Alliance's Camera Serial * Interface version 2 (MIPI CSI2). * @link_frequencies: array of supported link frequencies @@ -100,9 +51,9 @@ struct v4l2_fwnode_endpoint { */ enum v4l2_mbus_type bus_type; struct { - struct v4l2_fwnode_bus_parallel parallel; - struct v4l2_fwnode_bus_mipi_csi1 mipi_csi1; - struct v4l2_fwnode_bus_mipi_csi2 mipi_csi2; + struct v4l2_mbus_config_parallel parallel; + struct v4l2_mbus_config_mipi_csi1 mipi_csi1; + struct v4l2_mbus_config_mipi_csi2 mipi_csi2; } bus; u64 *link_frequencies; unsigned int nr_of_link_frequencies; diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h index 96af9cedacde..9c4970fbd8ea 100644 --- a/include/media/v4l2-mediabus.h +++ b/include/media/v4l2-mediabus.h @@ -92,6 +92,55 @@ V4L2_MBUS_CSI2_CHANNEL_2 | \ V4L2_MBUS_CSI2_CHANNEL_3) +#define V4L2_MBUS_CSI2_MAX_DATA_LANES 8 + +/** + * struct v4l2_mbus_config_mipi_csi2 - MIPI CSI-2 data bus configuration + * @flags: media bus (V4L2_MBUS_*) flags + * @data_lanes: an array of physical data lane indexes + * @clock_lane: physical lane index of the clock lane + * @num_data_lanes: number of data lanes + * @lane_polarities: polarity of the lanes. The order is the same of + * the physical lanes. + */ +struct v4l2_mbus_config_mipi_csi2 { + unsigned int flags; + unsigned char data_lanes[V4L2_MBUS_CSI2_MAX_DATA_LANES]; + unsigned char clock_lane; + unsigned char num_data_lanes; + bool lane_polarities[1 + V4L2_MBUS_CSI2_MAX_DATA_LANES]; +}; + +/** + * struct v4l2_mbus_config_parallel - parallel data bus configuration + * @flags: media bus (V4L2_MBUS_*) flags + * @bus_width: bus width in bits + * @data_shift: data shift in bits + */ +struct v4l2_mbus_config_parallel { + unsigned int flags; + unsigned char bus_width; + unsigned char data_shift; +}; + +/** + * struct v4l2_mbus_config_mipi_csi1 - CSI-1/CCP2 data bus configuration + * @clock_inv: polarity of clock/strobe signal + * false - not inverted, true - inverted + * @strobe: false - data/clock, true - data/strobe + * @lane_polarity: the polarities of the clock (index 0) and data lanes + * index (1) + * @data_lane: the number of the data lane + * @clock_lane: the number of the clock lane + */ +struct v4l2_mbus_config_mipi_csi1 { + unsigned char clock_inv:1; + unsigned char strobe:1; + bool lane_polarity[2]; + unsigned char data_lane; + unsigned char clock_lane; +}; + /** * enum v4l2_mbus_type - media bus type * @V4L2_MBUS_UNKNOWN: unknown bus type, no V4L2 mediabus configuration