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Sun, 19 Jul 2026 00:57:30 -0700 (PDT) Received: from thinkpad ([5.212.61.200]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-39eb4e5b31esm10490951fa.12.2026.07.19.00.57.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jul 2026 00:57:29 -0700 (PDT) From: Arash Golgol To: linux-media@vger.kernel.org Cc: yong.deng@magewell.com, paulk@sys-base.io, mchehab@kernel.org, wens@kernel.org, jernej.skrabec@gmail.com, samuel@sholland.org, laurent.pinchart@ideasonboard.com, linux-sunxi@lists.linux.dev, Arash Golgol Subject: [PATCH v5 1/2] media: sun6i-csi: bridge: Use V4L2 subdev active state Date: Sun, 19 Jul 2026 14:57:13 +0330 Message-Id: <20260719112714.72802-2-arash.golgol@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260719112714.72802-1-arash.golgol@gmail.com> References: <20260719112714.72802-1-arash.golgol@gmail.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Use the V4L2 subdev active state API to store the active format. This simplifies the driver not only by dropping the bridge mbus_format field, but it also allows dropping the bridge lock, replaced with the state lock. Previously, capture accessed bridge private state directly. After moving to framework-managed state, resolve the format through the subdev pad API. The sun6i-csi-bridge hardware does not perform any format conversion. Enforce identical formats on the sink and source pads in the set_fmt() and init_state() callbacks. Signed-off-by: Arash Golgol Reviewed-by: Paul Kocialkowski Tested-by: Paul Kocialkowski Reviewed-by: Laurent Pinchart --- .../sunxi/sun6i-csi/sun6i_csi_bridge.c | 155 ++++++++---------- .../sunxi/sun6i-csi/sun6i_csi_bridge.h | 9 - .../sunxi/sun6i-csi/sun6i_csi_capture.c | 27 ++- 3 files changed, 86 insertions(+), 105 deletions(-) diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c index d006d9dd0170..43a85bcc2ba2 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c @@ -13,26 +13,6 @@ #include "sun6i_csi_bridge.h" #include "sun6i_csi_reg.h" -/* Helpers */ - -void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev, - unsigned int *width, unsigned int *height) -{ - if (width) - *width = csi_dev->bridge.mbus_format.width; - if (height) - *height = csi_dev->bridge.mbus_format.height; -} - -void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev, - u32 *mbus_code, u32 *field) -{ - if (mbus_code) - *mbus_code = csi_dev->bridge.mbus_format.code; - if (field) - *field = csi_dev->bridge.mbus_format.field; -} - /* Format */ static const struct sun6i_csi_bridge_format sun6i_csi_bridge_formats[] = { @@ -226,7 +206,8 @@ static void sun6i_csi_bridge_disable(struct sun6i_csi_device *csi_dev) } static void -sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev) +sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev, + const struct v4l2_mbus_framefmt *mbus_format) { struct device *dev = csi_dev->dev; struct regmap *regmap = csi_dev->regmap; @@ -234,11 +215,9 @@ sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev) &csi_dev->bridge.source_parallel.endpoint; unsigned char bus_width = endpoint->bus.parallel.bus_width; unsigned int flags = endpoint->bus.parallel.flags; - u32 field; + u32 field = mbus_format->field; u32 value = SUN6I_CSI_IF_CFG_IF_CSI; - sun6i_csi_bridge_format(csi_dev, NULL, &field); - if (field == V4L2_FIELD_INTERLACED || field == V4L2_FIELD_INTERLACED_TB || field == V4L2_FIELD_INTERLACED_BT) @@ -317,13 +296,12 @@ sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev) } static void -sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev) +sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev, + const struct v4l2_mbus_framefmt *mbus_format) { struct regmap *regmap = csi_dev->regmap; u32 value = SUN6I_CSI_IF_CFG_IF_MIPI; - u32 field; - - sun6i_csi_bridge_format(csi_dev, NULL, &field); + u32 field = mbus_format->field; if (field == V4L2_FIELD_INTERLACED || field == V4L2_FIELD_INTERLACED_TB || @@ -335,19 +313,20 @@ sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev) regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value); } -static void sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev) +static void +sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev, + const struct v4l2_mbus_framefmt *mbus_format) { struct regmap *regmap = csi_dev->regmap; bool capture_streaming = csi_dev->capture.state.streaming; const struct sun6i_csi_bridge_format *bridge_format; const struct sun6i_csi_capture_format *capture_format; - u32 mbus_code, field, pixelformat; + u32 pixelformat; + u32 field = mbus_format->field; u8 input_format, input_yuv_seq, output_format; u32 value = 0; - sun6i_csi_bridge_format(csi_dev, &mbus_code, &field); - - bridge_format = sun6i_csi_bridge_format_find(mbus_code); + bridge_format = sun6i_csi_bridge_format_find(mbus_format->code); if (WARN_ON(!bridge_format)) return; @@ -391,16 +370,17 @@ static void sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev) } static void sun6i_csi_bridge_configure(struct sun6i_csi_device *csi_dev, - struct sun6i_csi_bridge_source *source) + struct sun6i_csi_bridge_source *source, + const struct v4l2_mbus_framefmt *mbus_format) { struct sun6i_csi_bridge *bridge = &csi_dev->bridge; if (source == &bridge->source_parallel) - sun6i_csi_bridge_configure_parallel(csi_dev); + sun6i_csi_bridge_configure_parallel(csi_dev, mbus_format); else - sun6i_csi_bridge_configure_mipi_csi2(csi_dev); + sun6i_csi_bridge_configure_mipi_csi2(csi_dev, mbus_format); - sun6i_csi_bridge_configure_format(csi_dev); + sun6i_csi_bridge_configure_format(csi_dev, mbus_format); } /* V4L2 Subdev */ @@ -415,6 +395,8 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) struct sun6i_csi_bridge_source *source; struct v4l2_subdev *source_subdev; struct media_pad *remote_pad; + struct v4l2_subdev_state *state; + const struct v4l2_mbus_framefmt *mbus_format; int ret; /* Source */ @@ -433,6 +415,10 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) else source = &bridge->source_mipi_csi2; + /* Active State */ + + state = v4l2_subdev_lock_and_get_active_state(subdev); + if (!on) { v4l2_subdev_call(source_subdev, video, s_stream, 0); ret = 0; @@ -443,7 +429,7 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) ret = pm_runtime_resume_and_get(dev); if (ret < 0) - return ret; + goto unlock; /* Clear */ @@ -451,7 +437,9 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) /* Configure */ - sun6i_csi_bridge_configure(csi_dev, source); + mbus_format = v4l2_subdev_state_get_format(state, + SUN6I_CSI_BRIDGE_PAD_SINK); + sun6i_csi_bridge_configure(csi_dev, source, mbus_format); if (capture_streaming) sun6i_csi_capture_configure(csi_dev); @@ -472,7 +460,8 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) if (ret && ret != -ENOIOCTLCMD) goto disable; - return 0; + ret = 0; + goto unlock; disable: if (capture_streaming) @@ -482,6 +471,8 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on) pm_runtime_put(dev); +unlock: + v4l2_subdev_unlock_state(state); return ret; } @@ -504,21 +495,23 @@ sun6i_csi_bridge_mbus_format_prepare(struct v4l2_mbus_framefmt *mbus_format) static int sun6i_csi_bridge_init_state(struct v4l2_subdev *subdev, struct v4l2_subdev_state *state) { - struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev); - unsigned int pad = SUN6I_CSI_BRIDGE_PAD_SINK; - struct v4l2_mbus_framefmt *mbus_format = - v4l2_subdev_state_get_format(state, pad); - struct mutex *lock = &csi_dev->bridge.lock; + unsigned int pad; - mutex_lock(lock); + /* + * This subdev does not perform format conversion, + * initialize both pads identically. + */ + for (pad = 0; pad < subdev->entity.num_pads; pad++) { + struct v4l2_mbus_framefmt *mbus_format; - mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code; - mbus_format->width = 1280; - mbus_format->height = 720; + mbus_format = v4l2_subdev_state_get_format(state, pad); - sun6i_csi_bridge_mbus_format_prepare(mbus_format); + mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code; + mbus_format->width = 1280; + mbus_format->height = 720; - mutex_unlock(lock); + sun6i_csi_bridge_mbus_format_prepare(mbus_format); + } return 0; } @@ -536,53 +529,32 @@ sun6i_csi_bridge_enum_mbus_code(struct v4l2_subdev *subdev, return 0; } -static int sun6i_csi_bridge_get_fmt(struct v4l2_subdev *subdev, - struct v4l2_subdev_state *state, - struct v4l2_subdev_format *format) -{ - struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev); - struct v4l2_mbus_framefmt *mbus_format = &format->format; - struct mutex *lock = &csi_dev->bridge.lock; - - mutex_lock(lock); - - if (format->which == V4L2_SUBDEV_FORMAT_TRY) - *mbus_format = *v4l2_subdev_state_get_format(state, - format->pad); - else - *mbus_format = csi_dev->bridge.mbus_format; - - mutex_unlock(lock); - - return 0; -} - static int sun6i_csi_bridge_set_fmt(struct v4l2_subdev *subdev, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { - struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev); - struct v4l2_mbus_framefmt *mbus_format = &format->format; - struct mutex *lock = &csi_dev->bridge.lock; + struct v4l2_mbus_framefmt *fmt; - mutex_lock(lock); + /* The format on the source pad always matches the sink pad. */ + if (format->pad != SUN6I_CSI_BRIDGE_PAD_SINK) + return v4l2_subdev_get_fmt(subdev, state, format); - sun6i_csi_bridge_mbus_format_prepare(mbus_format); + sun6i_csi_bridge_mbus_format_prepare(&format->format); - if (format->which == V4L2_SUBDEV_FORMAT_TRY) - *v4l2_subdev_state_get_format(state, format->pad) = - *mbus_format; - else - csi_dev->bridge.mbus_format = *mbus_format; + /* Set the format on the sink pad. */ + fmt = v4l2_subdev_state_get_format(state, format->pad); + *fmt = format->format; - mutex_unlock(lock); + /* Propagate the format to the source pad. */ + fmt = v4l2_subdev_state_get_format(state, SUN6I_CSI_BRIDGE_PAD_SOURCE); + *fmt = format->format; return 0; } static const struct v4l2_subdev_pad_ops sun6i_csi_bridge_pad_ops = { .enum_mbus_code = sun6i_csi_bridge_enum_mbus_code, - .get_fmt = sun6i_csi_bridge_get_fmt, + .get_fmt = v4l2_subdev_get_fmt, .set_fmt = sun6i_csi_bridge_set_fmt, }; @@ -780,8 +752,6 @@ int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev) }; int ret; - mutex_init(&bridge->lock); - /* V4L2 Subdev */ v4l2_subdev_init(subdev, &sun6i_csi_bridge_subdev_ops); @@ -809,6 +779,12 @@ int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev) if (ret < 0) return ret; + /* V4L2 Subdev finalize */ + + ret = v4l2_subdev_init_finalize(subdev); + if (ret < 0) + goto error_media_entity; + /* V4L2 Subdev */ if (csi_dev->isp_available) @@ -818,7 +794,7 @@ int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev) if (ret) { dev_err(dev, "failed to register v4l2 subdev: %d\n", ret); - goto error_media_entity; + goto error_subdev_finalize; } /* V4L2 Async */ @@ -852,6 +828,9 @@ int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev) else v4l2_device_unregister_subdev(subdev); +error_subdev_finalize: + v4l2_subdev_cleanup(subdev); + error_media_entity: media_entity_cleanup(&subdev->entity); @@ -868,5 +847,7 @@ void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev) v4l2_device_unregister_subdev(subdev); + v4l2_subdev_cleanup(subdev); + media_entity_cleanup(&subdev->entity); } diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.h index 44653b38f722..a5b0a6f064dd 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.h +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.h @@ -42,20 +42,11 @@ struct sun6i_csi_bridge { struct v4l2_subdev subdev; struct v4l2_async_notifier notifier; struct media_pad pads[2]; - struct v4l2_mbus_framefmt mbus_format; - struct mutex lock; /* Mbus format lock. */ struct sun6i_csi_bridge_source source_parallel; struct sun6i_csi_bridge_source source_mipi_csi2; }; -/* Helpers */ - -void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev, - unsigned int *width, unsigned int *height); -void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev, - u32 *mbus_code, u32 *field); - /* Format */ const struct sun6i_csi_bridge_format * diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c index 65879f4802c0..d90abba21309 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c @@ -888,14 +888,19 @@ static int sun6i_csi_capture_link_validate(struct media_link *link) media_entity_to_video_device(link->sink->entity); struct sun6i_csi_device *csi_dev = video_get_drvdata(video_dev); struct v4l2_device *v4l2_dev = csi_dev->v4l2_dev; + struct v4l2_subdev *src_subdev = + media_entity_to_v4l2_subdev(link->source->entity); const struct sun6i_csi_capture_format *capture_format; const struct sun6i_csi_bridge_format *bridge_format; unsigned int capture_width, capture_height; - unsigned int bridge_width, bridge_height; const struct v4l2_format_info *format_info; + struct v4l2_subdev_format src_fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + .pad = link->source->index + }; u32 pixelformat, capture_field; - u32 mbus_code, bridge_field; bool match; + int ret; sun6i_csi_capture_dimensions(csi_dev, &capture_width, &capture_height); @@ -904,19 +909,22 @@ static int sun6i_csi_capture_link_validate(struct media_link *link) if (WARN_ON(!capture_format)) return -EINVAL; - sun6i_csi_bridge_dimensions(csi_dev, &bridge_width, &bridge_height); + /* Resolve csi bridge format. */ + ret = v4l2_subdev_call(src_subdev, pad, get_fmt, NULL, &src_fmt); + if (ret) + return ret; - sun6i_csi_bridge_format(csi_dev, &mbus_code, &bridge_field); - bridge_format = sun6i_csi_bridge_format_find(mbus_code); + bridge_format = sun6i_csi_bridge_format_find(src_fmt.format.code); if (WARN_ON(!bridge_format)) return -EINVAL; /* No cropping/scaling is supported. */ - if (capture_width != bridge_width || capture_height != bridge_height) { + if (capture_width != src_fmt.format.width || + capture_height != src_fmt.format.height) { v4l2_err(v4l2_dev, "invalid input/output dimensions: %ux%u/%ux%u\n", - bridge_width, bridge_height, capture_width, - capture_height); + src_fmt.format.width, src_fmt.format.height, + capture_width, capture_height); return -EINVAL; } @@ -947,7 +955,8 @@ static int sun6i_csi_capture_link_validate(struct media_link *link) /* With raw input mode, we need a 1:1 match between input and output. */ if (bridge_format->input_format == SUN6I_CSI_INPUT_FMT_RAW || capture_format->input_format_raw) { - match = sun6i_csi_capture_format_match(pixelformat, mbus_code); + match = sun6i_csi_capture_format_match(pixelformat, + src_fmt.format.code); if (!match) goto invalid; } -- 2.34.1