[PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[Guoniu Zhou]

This patch series enhances the i.MX ISI driver's with virtual channel
support and adds frame descriptor capabilities to the crossbar subdevice.

Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>
---
Changes in v5:
- Rebase to latest media/next
- Swap patch order
- Return -EPIPE instead of -EINVAL for stream configuration errors
- Clear VC_ID_1 after generic mask to follow generic-then-conditional order
- Pass vc as function parameter instead of storing in pipe structure.
- Drop get_frame_desc fallback as crossbar now implements the operation
- Remove redundant num_entries check in mxc_isi_get_vc().
- Set vc to 0 for M2M as it doesn't support virtual channels.
- Use v4l2_subdev_get_frame_desc_passthrough helper
- Rewrote commit message
- Link to v4: https://lore.kernel.org/r/20260508-isi_vc-v4-0-feee39c63939@oss.nxp.com

Changes in v4:
- Rebase to latest media/next(previous dependency now in mainline)
- Fix VC boundary check: use num_vc (virtual channels count) instead of
  num_channels (ISI pipelines count)
- Set VC to 0 when frame descriptor has no entries
- Move platform-specific comments to block style to fix line length warnings
- Use %d instead of %u for ret variable in error messages
- Fix potential -ENOIOCTLCMD leak by resetting ret to 0 on continue
- See each patch's changelog for details
- Link to v3: https://lore.kernel.org/r/20260328-isi_vc-v3-0-a03b9a6fe117@oss.nxp.com

Changes in v3:
- Rebased on latest media/next
- Add num_vc field to platform data to indicate VC support
- Clear VC_ID_1 bit after reading CHNL_CTRL for proper VC switching
- Set VC_ID_1 only on platforms with num_vc > 4
- Improve mxc_isi_get_vc() error handling
- Add back CHNL_CTRL_BLANK_PXL and document platform-specific register fields
- Add xbar get_frame_desc() implementation (feedback from Laurent Pinchart)
- Link to v2: https://lore.kernel.org/r/20260310-isi_vc-v2-1-acbf77db8e6f@nxp.com

Changes in v2:
- Add Rb tag from Frank Li
- Fix typo in comment(s/support/supports/)
- Update commit log to include more details about ISI virtual channel support
  on different platform
- Include bitfield.h file to fix following build error
  drivers/media/platform/nxp/imx8-isi/imx8-isi-regs.h:23:65: error: implicit declaration of function ‘FIELD_PREP’ [-Wimplicit-function-declaration]
- Link to v1: https://lore.kernel.org/r/20260309-isi_vc-v1-1-fd0b8035d1cd@nxp.com

Changes in v1:
- Depends on https://lore.kernel.org/linux-media/20251105-isi_imx95-v3-2-3987533cca1c@nxp.com/

---
Guoniu Zhou (1):
      media: nxp: imx8-isi: Add virtual channel support

Guoniu.zhou (1):
      media: imx8-isi: crossbar: Add get_frame_desc operation

 .../media/platform/nxp/imx8-isi/imx8-isi-core.c    |  3 ++
 .../media/platform/nxp/imx8-isi/imx8-isi-core.h    |  2 +
 .../platform/nxp/imx8-isi/imx8-isi-crossbar.c      |  1 +
 drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c  | 17 +++++++-
 drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c |  2 +-
 .../media/platform/nxp/imx8-isi/imx8-isi-pipe.c    | 50 +++++++++++++++++++++-
 .../media/platform/nxp/imx8-isi/imx8-isi-regs.h    | 12 ++++--
 7 files changed, 80 insertions(+), 7 deletions(-)
---
base-commit: 2c8fe1f14240d75f2002e16b2b69c5c2d27ed41c
change-id: 20260309-isi_vc-285fd815140e

Best regards,
-- 
Guoniu Zhou <guoniu.zhou@oss.nxp.com>

[PATCH v5 1/2] media: imx8-isi: crossbar: Add get_frame_desc operation

[Guoniu Zhou]

From: "Guoniu.zhou" <guoniu.zhou@nxp.com>

Implement the get_frame_desc pad operation for the crossbar subdev using
the v4l2_subdev_get_frame_desc_passthrough() helper. This allows the
crossbar to properly propagate frame descriptors from its sink pads to
its source pads, which is necessary for proper stream configuration in
multiplexed streams scenarios.

Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>
---
Changes in v5:
- Use v4l2_subdev_get_frame_desc_passthrough helper
- Rewrote commit message

Changes in v4:
- Use %d instead of %u for ret variable in error messages
- Fix potential -ENOIOCTLCMD leak by resetting ret to 0 on continue

Changes in v3:
- New patch added based on feedback from Laurent Pinchart
---
 drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c
index 605a45124103..0b593aed618b 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c
@@ -404,6 +404,7 @@ static const struct v4l2_subdev_pad_ops mxc_isi_crossbar_subdev_pad_ops = {
 	.enum_mbus_code = mxc_isi_crossbar_enum_mbus_code,
 	.get_fmt = v4l2_subdev_get_fmt,
 	.set_fmt = mxc_isi_crossbar_set_fmt,
+	.get_frame_desc = v4l2_subdev_get_frame_desc_passthrough,
 	.set_routing = mxc_isi_crossbar_set_routing,
 	.enable_streams = mxc_isi_crossbar_enable_streams,
 	.disable_streams = mxc_isi_crossbar_disable_streams,

-- 
2.34.1

[PATCH v5 2/2] media: nxp: imx8-isi: Add virtual channel support

[Guoniu Zhou]

From: Guoniu Zhou <guoniu.zhou@nxp.com>

The ISI supports different numbers of virtual channels depending on the
platform. i.MX95 supports 8 virtual channels, and i.MX8QXP/QM support 4
virtual channels. They are used in multiple camera use cases, such as
surround view. Other platforms (such as i.MX8/MN/MP/ULP/91/93) don't
support virtual channels, and the VC_ID bits are marked as read-only.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>
---
Changes in v5:
- Return -EPIPE instead of -EINVAL for stream configuration errors
- Clear VC_ID_1 after generic mask to follow generic-then-conditional order
- Pass vc as function parameter instead of storing in pipe structure.
- Drop get_frame_desc fallback as crossbar now implements the operation
- Remove redundant num_entries check in mxc_isi_get_vc().
- Set vc to 0 for M2M as it doesn't support virtual channels.

Changes in v4:
- Fix VC boundary check: use num_vc (virtual channels count) instead of
  num_channels (ISI pipelines count)
- Set VC to 0 when frame descriptor has no entries
- Move platform-specific comments to block style to fix line length warnings

Changes in v3:
- Add num_vc field to platform data to indicate VC support
- Clear VC_ID_1 bit after reading CHNL_CTRL for proper VC switching
- Set VC_ID_1 only on platforms with num_vc > 4
- Improve mxc_isi_get_vc() error handling
- Add back CHNL_CTRL_BLANK_PXL and document platform-specific register fields
---
 .../media/platform/nxp/imx8-isi/imx8-isi-core.c    |  3 ++
 .../media/platform/nxp/imx8-isi/imx8-isi-core.h    |  2 +
 drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c  | 17 +++++++-
 drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c |  2 +-
 .../media/platform/nxp/imx8-isi/imx8-isi-pipe.c    | 50 +++++++++++++++++++++-
 .../media/platform/nxp/imx8-isi/imx8-isi-regs.h    | 12 ++++--
 6 files changed, 79 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
index 4bf8570e1b9e..837ac7046cf2 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
@@ -318,6 +318,7 @@ static const struct mxc_isi_plat_data mxc_imx95_data = {
 	.model			= MXC_ISI_IMX95,
 	.num_ports		= 4,
 	.num_channels		= 8,
+	.num_vc			= 8,
 	.reg_offset		= 0x10000,
 	.ier_reg		= &mxc_imx8_isi_ier_v2,
 	.set_thd		= &mxc_imx8_isi_thd_v1,
@@ -329,6 +330,7 @@ static const struct mxc_isi_plat_data mxc_imx8qm_data = {
 	.model			= MXC_ISI_IMX8QM,
 	.num_ports		= 5,
 	.num_channels		= 8,
+	.num_vc			= 4,
 	.reg_offset		= 0x10000,
 	.ier_reg		= &mxc_imx8_isi_ier_qm,
 	.set_thd		= &mxc_imx8_isi_thd_v1,
@@ -340,6 +342,7 @@ static const struct mxc_isi_plat_data mxc_imx8qxp_data = {
 	.model			= MXC_ISI_IMX8QXP,
 	.num_ports		= 5,
 	.num_channels		= 6,
+	.num_vc			= 4,
 	.reg_offset		= 0x10000,
 	.ier_reg		= &mxc_imx8_isi_ier_v2,
 	.set_thd		= &mxc_imx8_isi_thd_v1,
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
index 14d63ec36416..2957119c81f2 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
@@ -169,6 +169,7 @@ struct mxc_isi_plat_data {
 	enum model model;
 	unsigned int num_ports;
 	unsigned int num_channels;
+	unsigned int num_vc;		/* Number of VCs, 0 = no VC support */
 	unsigned int reg_offset;
 	const struct mxc_isi_ier_reg  *ier_reg;
 	const struct mxc_isi_set_thd *set_thd;
@@ -377,6 +378,7 @@ void mxc_isi_channel_unchain(struct mxc_isi_pipe *pipe);
 
 void mxc_isi_channel_config(struct mxc_isi_pipe *pipe,
 			    enum mxc_isi_input_id input,
+			    unsigned int vc,
 			    const struct v4l2_area *in_size,
 			    const struct v4l2_area *scale,
 			    const struct v4l2_rect *crop,
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c
index 0187d4ab97e8..a98d7bec731d 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c
@@ -301,6 +301,7 @@ static void mxc_isi_channel_set_panic_threshold(struct mxc_isi_pipe *pipe)
 
 static void mxc_isi_channel_set_control(struct mxc_isi_pipe *pipe,
 					enum mxc_isi_input_id input,
+					unsigned int vc,
 					bool bypass)
 {
 	u32 val;
@@ -312,6 +313,10 @@ static void mxc_isi_channel_set_control(struct mxc_isi_pipe *pipe,
 		 CHNL_CTRL_SRC_TYPE_MASK | CHNL_CTRL_MIPI_VC_ID_MASK |
 		 CHNL_CTRL_SRC_INPUT_MASK);
 
+	/* Clear the VC_ID_1 bit on platforms supporting more than 4 VCs. */
+	if (pipe->isi->pdata->num_vc > 4)
+		val &= ~CHNL_CTRL_VC_ID_1_MASK;
+
 	/*
 	 * If no scaling or color space conversion is needed, bypass the
 	 * channel.
@@ -338,7 +343,14 @@ static void mxc_isi_channel_set_control(struct mxc_isi_pipe *pipe,
 	} else {
 		val |= CHNL_CTRL_SRC_TYPE(CHNL_CTRL_SRC_TYPE_DEVICE);
 		val |= CHNL_CTRL_SRC_INPUT(input);
-		val |= CHNL_CTRL_MIPI_VC_ID(0); /* FIXME: For CSI-2 only */
+		val |= CHNL_CTRL_MIPI_VC_ID(vc); /* FIXME: For CSI-2 only */
+
+		/*
+		 * On platforms with more than 4 VCs (i.MX95), the VC ID is
+		 * split across VC_ID_0 (bits 7:6) and VC_ID_1 (bit 16).
+		 */
+		if (pipe->isi->pdata->num_vc > 4)
+			val |= CHNL_CTRL_VC_ID_1(vc >> 2);
 	}
 
 	mxc_isi_write(pipe, CHNL_CTRL, val);
@@ -348,6 +360,7 @@ static void mxc_isi_channel_set_control(struct mxc_isi_pipe *pipe,
 
 void mxc_isi_channel_config(struct mxc_isi_pipe *pipe,
 			    enum mxc_isi_input_id input,
+			    unsigned int vc,
 			    const struct v4l2_area *in_size,
 			    const struct v4l2_area *scale,
 			    const struct v4l2_rect *crop,
@@ -374,7 +387,7 @@ void mxc_isi_channel_config(struct mxc_isi_pipe *pipe,
 	mxc_isi_channel_set_panic_threshold(pipe);
 
 	/* Channel control */
-	mxc_isi_channel_set_control(pipe, input, csc_bypass && scaler_bypass);
+	mxc_isi_channel_set_control(pipe, input, vc, csc_bypass && scaler_bypass);
 }
 
 void mxc_isi_channel_set_input_format(struct mxc_isi_pipe *pipe,
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
index a39ad7a1ab18..291907ef44cb 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
@@ -144,7 +144,7 @@ static void mxc_isi_m2m_device_run(void *priv)
 			.height = ctx->queues.cap.format.height,
 		};
 
-		mxc_isi_channel_config(m2m->pipe, MXC_ISI_INPUT_MEM,
+		mxc_isi_channel_config(m2m->pipe, MXC_ISI_INPUT_MEM, 0,
 				       &in_size, &scale, &crop,
 				       ctx->queues.out.info->encoding,
 				       ctx->queues.cap.info->encoding);
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c
index a41c51dd9ce0..03e0115b5b5a 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c
@@ -232,6 +232,47 @@ static inline struct mxc_isi_pipe *to_isi_pipe(struct v4l2_subdev *sd)
 	return container_of(sd, struct mxc_isi_pipe, sd);
 }
 
+static int mxc_isi_get_vc(struct mxc_isi_pipe *pipe)
+{
+	struct mxc_isi_crossbar *xbar = &pipe->isi->crossbar;
+	struct device *dev = pipe->isi->dev;
+	struct v4l2_mbus_frame_desc fd = { };
+	unsigned int source_pad = xbar->num_sinks + pipe->id;
+	unsigned int max_vc;
+	unsigned int i;
+	int ret;
+
+	ret = v4l2_subdev_call(&xbar->sd, pad, get_frame_desc,
+			       source_pad, &fd);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get source frame desc from pad %u\n",
+			source_pad);
+		return ret;
+	}
+
+	/* Find stream 0 in the frame descriptor */
+	for (i = 0; i < fd.num_entries; i++) {
+		if (fd.entry[i].stream == 0)
+			break;
+	}
+
+	if (i == fd.num_entries) {
+		dev_err(dev, "Failed to find stream from source frame desc\n");
+		return -EPIPE;
+	}
+
+	max_vc = pipe->isi->pdata->num_vc ? : 1;
+
+	/* Check virtual channel range */
+	if (fd.entry[i].bus.csi2.vc >= max_vc) {
+		dev_err(dev, "Virtual channel %u exceeds maximum %u\n",
+			fd.entry[i].bus.csi2.vc, max_vc - 1);
+		return -EPIPE;
+	}
+
+	return fd.entry[i].bus.csi2.vc;
+}
+
 int mxc_isi_pipe_enable(struct mxc_isi_pipe *pipe)
 {
 	struct mxc_isi_crossbar *xbar = &pipe->isi->crossbar;
@@ -244,6 +285,7 @@ int mxc_isi_pipe_enable(struct mxc_isi_pipe *pipe)
 	struct v4l2_subdev *sd = &pipe->sd;
 	struct v4l2_area in_size, scale;
 	struct v4l2_rect crop;
+	unsigned int vc;
 	u32 input;
 	int ret;
 
@@ -280,8 +322,14 @@ int mxc_isi_pipe_enable(struct mxc_isi_pipe *pipe)
 
 	v4l2_subdev_unlock_state(state);
 
+	ret = mxc_isi_get_vc(pipe);
+	if (ret < 0)
+		return ret;
+
+	vc = ret;
+
 	/* Configure the ISI channel. */
-	mxc_isi_channel_config(pipe, input, &in_size, &scale, &crop,
+	mxc_isi_channel_config(pipe, input, vc, &in_size, &scale, &crop,
 			       sink_info->encoding, src_info->encoding);
 
 	mxc_isi_channel_enable(pipe);
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-regs.h b/drivers/media/platform/nxp/imx8-isi/imx8-isi-regs.h
index 1b65eccdf0da..e795f4daf3ff 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-regs.h
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-regs.h
@@ -6,6 +6,7 @@
 #ifndef __IMX8_ISI_REGS_H__
 #define __IMX8_ISI_REGS_H__
 
+#include <linux/bitfield.h>
 #include <linux/bits.h>
 
 /* ISI Registers Define  */
@@ -19,9 +20,14 @@
 #define CHNL_CTRL_CHAIN_BUF_NO_CHAIN				0
 #define CHNL_CTRL_CHAIN_BUF_2_CHAIN				1
 #define CHNL_CTRL_SW_RST					BIT(24)
-#define CHNL_CTRL_BLANK_PXL(n)					((n) << 16)
-#define CHNL_CTRL_BLANK_PXL_MASK				GENMASK(23, 16)
-#define CHNL_CTRL_MIPI_VC_ID(n)					((n) << 6)
+/*
+ * CHNL_CTRL_BLANK_PXL: i.MX8{QM,QXP} only
+ * CHNL_CTRL_VC_ID_1, CHNL_CTRL_VC_ID_1_MASK: i.MX95 only
+ */
+#define CHNL_CTRL_BLANK_PXL(n)					FIELD_PREP(GENMASK(23, 16), (n))
+#define CHNL_CTRL_VC_ID_1(n)					FIELD_PREP(BIT(16), (n))
+#define CHNL_CTRL_VC_ID_1_MASK					BIT(16)
+#define CHNL_CTRL_MIPI_VC_ID(n)					FIELD_PREP(GENMASK(7, 6), (n))
 #define CHNL_CTRL_MIPI_VC_ID_MASK				GENMASK(7, 6)
 #define CHNL_CTRL_SRC_TYPE(n)					((n) << 4)
 #define CHNL_CTRL_SRC_TYPE_MASK					BIT(4)

-- 
2.34.1

Re: (subset) [PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[Frank.Li]

From: Frank Li <Frank.Li@nxp.com>


On Thu, 21 May 2026 17:10:03 +0800, Guoniu Zhou wrote:
> This patch series enhances the i.MX ISI driver's with virtual channel
> support and adds frame descriptor capabilities to the crossbar subdevice.

Applied, thanks!

[1/2] media: imx8-isi: crossbar: Add get_frame_desc operation
      commit: 3e15a3510908c990ee352aa206d5f9c23d4b216e

Best regards,
-- 
Frank Li <Frank.Li@nxp.com>

Re: (subset) [PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[Laurent Pinchart]

On Mon, Jun 29, 2026 at 03:42:31PM -0400, Frank.Li@oss.nxp.com wrote:
> From: Frank Li <Frank.Li@nxp.com>
> 
> 
> On Thu, 21 May 2026 17:10:03 +0800, Guoniu Zhou wrote:
> > This patch series enhances the i.MX ISI driver's with virtual channel
> > support and adds frame descriptor capabilities to the crossbar subdevice.
> 
> Applied, thanks!
> 
> [1/2] media: imx8-isi: crossbar: Add get_frame_desc operation
>       commit: 3e15a3510908c990ee352aa206d5f9c23d4b216e

Is this a mistake ? Patch 1/2 has no R-b tag, and you're not listed as
maintainer for this driver.

-- 
Regards,

Laurent Pinchart

Re: (subset) [PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[Frank Li]

On Mon, Jun 29, 2026 at 11:23:02PM +0300, Laurent Pinchart wrote:
> On Mon, Jun 29, 2026 at 03:42:31PM -0400, Frank.Li@oss.nxp.com wrote:
> > From: Frank Li <Frank.Li@nxp.com>
> >
> >
> > On Thu, 21 May 2026 17:10:03 +0800, Guoniu Zhou wrote:
> > > This patch series enhances the i.MX ISI driver's with virtual channel
> > > support and adds frame descriptor capabilities to the crossbar subdevice.
> >
> > Applied, thanks!
> >
> > [1/2] media: imx8-isi: crossbar: Add get_frame_desc operation
> >       commit: 3e15a3510908c990ee352aa206d5f9c23d4b216e
>
> Is this a mistake ? Patch 1/2 has no R-b tag, and you're not listed as
> maintainer for this driver.

Sorry, I missed checking Maintainer files, in media summit, agree on I pick
imx's media drivers, but forget finalize the file\dir list. Can you help
summery which files\dir I should take care?

If you have concern about this patch, I can drop it.

Frank


>
> --
> Regards,
>
> Laurent Pinchart

Re: (subset) [PATCH v5 0/2] media: nxp: imx8-isi: Add virtual channel and frame descriptor support

[Bryan O'Donoghue]

On 30/06/2026 17:20, Frank Li wrote:
> On Mon, Jun 29, 2026 at 11:23:02PM +0300, Laurent Pinchart wrote:
>> On Mon, Jun 29, 2026 at 03:42:31PM -0400, Frank.Li@oss.nxp.com wrote:
>>> From: Frank Li <Frank.Li@nxp.com>
>>>
>>>
>>> On Thu, 21 May 2026 17:10:03 +0800, Guoniu Zhou wrote:
>>>> This patch series enhances the i.MX ISI driver's with virtual channel
>>>> support and adds frame descriptor capabilities to the crossbar subdevice.
>>>
>>> Applied, thanks!
>>>
>>> [1/2] media: imx8-isi: crossbar: Add get_frame_desc operation
>>>        commit: 3e15a3510908c990ee352aa206d5f9c23d4b216e
>>
>> Is this a mistake ? Patch 1/2 has no R-b tag, and you're not listed as
>> maintainer for this driver.
> 
> Sorry, I missed checking Maintainer files, in media summit, agree on I pick
> imx's media drivers, but forget finalize the file\dir list. Can you help
> summery which files\dir I should take care?
> 
> If you have concern about this patch, I can drop it.
> 
> Frank
You should set yourself up here: 
https://patchwork.linuxtv.org/project/linux-media/list/

That way you can coordinate with other maintainers on which files get 
reviewed by whom, see what the RB and ci status is.

Its pretty essential.

---
bod