[PATCH v4 0/4] media: ti: cal: Improvements

[PATCH v4 0/4] media: ti: cal: Improvements

[Tomi Valkeinen]

Hi,

This series contains the simpler fixes & improvements from the 
"[PATCH v3 0/5] media: ti: cal: Streams support" series. I have opted to
keep the patch that adds the streams support still in my WIP branch, as
I want to experiment with a few things.

However, the rest of the patches in that series should be fine for
merging. These are unchanged, but I have added Jacopo's RBs.

Here's a link to the v3:

https://lore.kernel.org/all/20230302100755.191164-1-tomi.valkeinen@ideasonboard.com/

 Tomi

Tomi Valkeinen (4):
  media: ti: cal: Clean up mbus formats uses
  media: ti: cal: Fix cal_camerarx_create() error handling
  media: ti: cal: Use subdev state
  media: ti: cal: Implement get_frame_desc for camera-rx

 drivers/media/platform/ti/cal/cal-camerarx.c | 206 +++++++------------
 drivers/media/platform/ti/cal/cal-video.c    |  23 ++-
 drivers/media/platform/ti/cal/cal.c          |  66 ++----
 drivers/media/platform/ti/cal/cal.h          |  10 -
 4 files changed, 115 insertions(+), 190 deletions(-)

-- 
2.34.1

[PATCH v4 1/4] media: ti: cal: Clean up mbus formats uses

[Tomi Valkeinen]

Clean up the CAL drivers uses of mbus formats:

- Switch all YUV formats from 2X8 formats to 1X16, as those are what
  should be used for CSI-2 bus.

- Drop 24 and 32 bit formats, as the driver doesn't support them (see
  cal_ctx_pix_proc_config()).

- Switch RGB565_2X8_LE to RGB565_1X16 (for the same reason as for the
  YUV formats) and drop RGB565_2X8_BE as it cannot be supported with
  CSI-2.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/platform/ti/cal/cal-camerarx.c |  2 +-
 drivers/media/platform/ti/cal/cal-video.c    |  2 +-
 drivers/media/platform/ti/cal/cal.c          | 36 ++++----------------
 3 files changed, 8 insertions(+), 32 deletions(-)

diff --git a/drivers/media/platform/ti/cal/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c
index 16ae52879a79..267089b0fea0 100644
--- a/drivers/media/platform/ti/cal/cal-camerarx.c
+++ b/drivers/media/platform/ti/cal/cal-camerarx.c
@@ -817,7 +817,7 @@ static int cal_camerarx_sd_init_cfg(struct v4l2_subdev *sd,
 		.format = {
 			.width = 640,
 			.height = 480,
-			.code = MEDIA_BUS_FMT_UYVY8_2X8,
+			.code = MEDIA_BUS_FMT_UYVY8_1X16,
 			.field = V4L2_FIELD_NONE,
 			.colorspace = V4L2_COLORSPACE_SRGB,
 			.ycbcr_enc = V4L2_YCBCR_ENC_601,
diff --git a/drivers/media/platform/ti/cal/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c
index ca906a9e4222..ed92e23d4b16 100644
--- a/drivers/media/platform/ti/cal/cal-video.c
+++ b/drivers/media/platform/ti/cal/cal-video.c
@@ -894,7 +894,7 @@ static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx)
 	const struct cal_format_info *fmtinfo;
 	struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix;
 
-	fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_2X8);
+	fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_1X16);
 	if (!fmtinfo)
 		return -EINVAL;
 
diff --git a/drivers/media/platform/ti/cal/cal.c b/drivers/media/platform/ti/cal/cal.c
index 9c5105223d6b..18d86f6ae809 100644
--- a/drivers/media/platform/ti/cal/cal.c
+++ b/drivers/media/platform/ti/cal/cal.c
@@ -61,48 +61,24 @@ MODULE_PARM_DESC(mc_api, "activates the MC API");
 const struct cal_format_info cal_formats[] = {
 	{
 		.fourcc		= V4L2_PIX_FMT_YUYV,
-		.code		= MEDIA_BUS_FMT_YUYV8_2X8,
+		.code		= MEDIA_BUS_FMT_YUYV8_1X16,
 		.bpp		= 16,
 	}, {
 		.fourcc		= V4L2_PIX_FMT_UYVY,
-		.code		= MEDIA_BUS_FMT_UYVY8_2X8,
+		.code		= MEDIA_BUS_FMT_UYVY8_1X16,
 		.bpp		= 16,
 	}, {
 		.fourcc		= V4L2_PIX_FMT_YVYU,
-		.code		= MEDIA_BUS_FMT_YVYU8_2X8,
+		.code		= MEDIA_BUS_FMT_YVYU8_1X16,
 		.bpp		= 16,
 	}, {
 		.fourcc		= V4L2_PIX_FMT_VYUY,
-		.code		= MEDIA_BUS_FMT_VYUY8_2X8,
+		.code		= MEDIA_BUS_FMT_VYUY8_1X16,
 		.bpp		= 16,
 	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
-		.code		= MEDIA_BUS_FMT_RGB565_2X8_LE,
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+		.code		= MEDIA_BUS_FMT_RGB565_1X16,
 		.bpp		= 16,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
-		.code		= MEDIA_BUS_FMT_RGB565_2X8_BE,
-		.bpp		= 16,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
-		.code		= MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
-		.bpp		= 16,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
-		.code		= MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
-		.bpp		= 16,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB24, /* rgb */
-		.code		= MEDIA_BUS_FMT_RGB888_2X12_LE,
-		.bpp		= 24,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_BGR24, /* bgr */
-		.code		= MEDIA_BUS_FMT_RGB888_2X12_BE,
-		.bpp		= 24,
-	}, {
-		.fourcc		= V4L2_PIX_FMT_RGB32, /* argb */
-		.code		= MEDIA_BUS_FMT_ARGB8888_1X32,
-		.bpp		= 32,
 	}, {
 		.fourcc		= V4L2_PIX_FMT_SBGGR8,
 		.code		= MEDIA_BUS_FMT_SBGGR8_1X8,
-- 
2.34.1

[PATCH v4 2/4] media: ti: cal: Fix cal_camerarx_create() error handling

[Tomi Valkeinen]

We don't do a proper job at freeing resources in cal_camerarx_create's
error paths.

Fix these, and also switch the phy allcation from kzalloc to
devm_kzalloc to simplify the code further.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/platform/ti/cal/cal-camerarx.c | 23 +++++++++++---------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/ti/cal/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c
index 267089b0fea0..97208d542f9e 100644
--- a/drivers/media/platform/ti/cal/cal-camerarx.c
+++ b/drivers/media/platform/ti/cal/cal-camerarx.c
@@ -864,7 +864,7 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	unsigned int i;
 	int ret;
 
-	phy = kzalloc(sizeof(*phy), GFP_KERNEL);
+	phy = devm_kzalloc(cal->dev, sizeof(*phy), GFP_KERNEL);
 	if (!phy)
 		return ERR_PTR(-ENOMEM);
 
@@ -882,7 +882,7 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	if (IS_ERR(phy->base)) {
 		cal_err(cal, "failed to ioremap\n");
 		ret = PTR_ERR(phy->base);
-		goto error;
+		goto err_destroy_mutex;
 	}
 
 	cal_dbg(1, cal, "ioresource %s at %pa - %pa\n",
@@ -890,11 +890,11 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 
 	ret = cal_camerarx_regmap_init(cal, phy);
 	if (ret)
-		goto error;
+		goto err_destroy_mutex;
 
 	ret = cal_camerarx_parse_dt(phy);
 	if (ret)
-		goto error;
+		goto err_destroy_mutex;
 
 	/* Initialize the V4L2 subdev and media entity. */
 	sd = &phy->subdev;
@@ -911,21 +911,25 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	ret = media_entity_pads_init(&sd->entity, ARRAY_SIZE(phy->pads),
 				     phy->pads);
 	if (ret)
-		goto error;
+		goto err_node_put;
 
 	ret = cal_camerarx_sd_init_cfg(sd, NULL);
 	if (ret)
-		goto error;
+		goto err_entity_cleanup;
 
 	ret = v4l2_device_register_subdev(&cal->v4l2_dev, sd);
 	if (ret)
-		goto error;
+		goto err_entity_cleanup;
 
 	return phy;
 
-error:
+err_entity_cleanup:
 	media_entity_cleanup(&phy->subdev.entity);
-	kfree(phy);
+err_node_put:
+	of_node_put(phy->source_ep_node);
+	of_node_put(phy->source_node);
+err_destroy_mutex:
+	mutex_destroy(&phy->mutex);
 	return ERR_PTR(ret);
 }
 
@@ -939,5 +943,4 @@ void cal_camerarx_destroy(struct cal_camerarx *phy)
 	of_node_put(phy->source_ep_node);
 	of_node_put(phy->source_node);
 	mutex_destroy(&phy->mutex);
-	kfree(phy);
 }
-- 
2.34.1

[PATCH v4 3/4] media: ti: cal: Use subdev state

[Tomi Valkeinen]

Change TI CAL driver to use subdev state. No functional changes
(intended).

This allows us to get rid of the 'formats' field, as the formats are
kept in the state, and also the 'mutex' as we already have state locking.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/platform/ti/cal/cal-camerarx.c | 131 +++++--------------
 drivers/media/platform/ti/cal/cal-video.c    |  21 ++-
 drivers/media/platform/ti/cal/cal.h          |   8 --
 3 files changed, 53 insertions(+), 107 deletions(-)

diff --git a/drivers/media/platform/ti/cal/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c
index 97208d542f9e..bc09c3f1446d 100644
--- a/drivers/media/platform/ti/cal/cal-camerarx.c
+++ b/drivers/media/platform/ti/cal/cal-camerarx.c
@@ -50,10 +50,16 @@ static s64 cal_camerarx_get_ext_link_freq(struct cal_camerarx *phy)
 	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;
+	struct v4l2_subdev_state *state;
+	struct v4l2_mbus_framefmt *fmt;
 	u32 bpp;
 	s64 freq;
 
-	fmtinfo = cal_format_by_code(phy->formats[CAL_CAMERARX_PAD_SINK].code);
+	state = v4l2_subdev_get_locked_active_state(&phy->subdev);
+
+	fmt = v4l2_subdev_get_pad_format(&phy->subdev, state, CAL_CAMERARX_PAD_SINK);
+
+	fmtinfo = cal_format_by_code(fmt->code);
 	if (!fmtinfo)
 		return -EINVAL;
 
@@ -620,34 +626,20 @@ static inline struct cal_camerarx *to_cal_camerarx(struct v4l2_subdev *sd)
 	return container_of(sd, struct cal_camerarx, subdev);
 }
 
-static struct v4l2_mbus_framefmt *
-cal_camerarx_get_pad_format(struct cal_camerarx *phy,
-			    struct v4l2_subdev_state *state,
-			    unsigned int pad, u32 which)
-{
-	switch (which) {
-	case V4L2_SUBDEV_FORMAT_TRY:
-		return v4l2_subdev_get_try_format(&phy->subdev, state, pad);
-	case V4L2_SUBDEV_FORMAT_ACTIVE:
-		return &phy->formats[pad];
-	default:
-		return NULL;
-	}
-}
-
 static int cal_camerarx_sd_s_stream(struct v4l2_subdev *sd, int enable)
 {
 	struct cal_camerarx *phy = to_cal_camerarx(sd);
+	struct v4l2_subdev_state *state;
 	int ret = 0;
 
-	mutex_lock(&phy->mutex);
+	state = v4l2_subdev_lock_and_get_active_state(sd);
 
 	if (enable)
 		ret = cal_camerarx_start(phy);
 	else
 		cal_camerarx_stop(phy);
 
-	mutex_unlock(&phy->mutex);
+	v4l2_subdev_unlock_state(state);
 
 	return ret;
 }
@@ -657,62 +649,44 @@ static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd,
 					  struct v4l2_subdev_mbus_code_enum *code)
 {
 	struct cal_camerarx *phy = to_cal_camerarx(sd);
-	int ret = 0;
-
-	mutex_lock(&phy->mutex);
 
 	/* No transcoding, source and sink codes must match. */
 	if (cal_rx_pad_is_source(code->pad)) {
 		struct v4l2_mbus_framefmt *fmt;
 
-		if (code->index > 0) {
-			ret = -EINVAL;
-			goto out;
-		}
+		if (code->index > 0)
+			return -EINVAL;
 
-		fmt = cal_camerarx_get_pad_format(phy, state,
-						  CAL_CAMERARX_PAD_SINK,
-						  code->which);
+		fmt = v4l2_subdev_get_pad_format(&phy->subdev, state,
+						 CAL_CAMERARX_PAD_SINK);
 		code->code = fmt->code;
 	} else {
-		if (code->index >= cal_num_formats) {
-			ret = -EINVAL;
-			goto out;
-		}
+		if (code->index >= cal_num_formats)
+			return -EINVAL;
 
 		code->code = cal_formats[code->index].code;
 	}
 
-out:
-	mutex_unlock(&phy->mutex);
-
-	return ret;
+	return 0;
 }
 
 static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd,
 					   struct v4l2_subdev_state *state,
 					   struct v4l2_subdev_frame_size_enum *fse)
 {
-	struct cal_camerarx *phy = to_cal_camerarx(sd);
 	const struct cal_format_info *fmtinfo;
-	int ret = 0;
 
 	if (fse->index > 0)
 		return -EINVAL;
 
-	mutex_lock(&phy->mutex);
-
 	/* No transcoding, source and sink formats must match. */
 	if (cal_rx_pad_is_source(fse->pad)) {
 		struct v4l2_mbus_framefmt *fmt;
 
-		fmt = cal_camerarx_get_pad_format(phy, state,
-						  CAL_CAMERARX_PAD_SINK,
-						  fse->which);
-		if (fse->code != fmt->code) {
-			ret = -EINVAL;
-			goto out;
-		}
+		fmt = v4l2_subdev_get_pad_format(sd, state,
+						 CAL_CAMERARX_PAD_SINK);
+		if (fse->code != fmt->code)
+			return -EINVAL;
 
 		fse->min_width = fmt->width;
 		fse->max_width = fmt->width;
@@ -720,10 +694,8 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd,
 		fse->max_height = fmt->height;
 	} else {
 		fmtinfo = cal_format_by_code(fse->code);
-		if (!fmtinfo) {
-			ret = -EINVAL;
-			goto out;
-		}
+		if (!fmtinfo)
+			return -EINVAL;
 
 		fse->min_width = CAL_MIN_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8);
 		fse->max_width = CAL_MAX_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8);
@@ -731,27 +703,6 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd,
 		fse->max_height = CAL_MAX_HEIGHT_LINES;
 	}
 
-out:
-	mutex_unlock(&phy->mutex);
-
-	return ret;
-}
-
-static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd,
-				   struct v4l2_subdev_state *state,
-				   struct v4l2_subdev_format *format)
-{
-	struct cal_camerarx *phy = to_cal_camerarx(sd);
-	struct v4l2_mbus_framefmt *fmt;
-
-	mutex_lock(&phy->mutex);
-
-	fmt = cal_camerarx_get_pad_format(phy, state, format->pad,
-					  format->which);
-	format->format = *fmt;
-
-	mutex_unlock(&phy->mutex);
-
 	return 0;
 }
 
@@ -759,14 +710,13 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd,
 				   struct v4l2_subdev_state *state,
 				   struct v4l2_subdev_format *format)
 {
-	struct cal_camerarx *phy = to_cal_camerarx(sd);
 	const struct cal_format_info *fmtinfo;
 	struct v4l2_mbus_framefmt *fmt;
 	unsigned int bpp;
 
 	/* No transcoding, source and sink formats must match. */
 	if (cal_rx_pad_is_source(format->pad))
-		return cal_camerarx_sd_get_fmt(sd, state, format);
+		return v4l2_subdev_get_fmt(sd, state, format);
 
 	/*
 	 * Default to the first format if the requested media bus code isn't
@@ -790,20 +740,13 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd,
 
 	/* Store the format and propagate it to the source pad. */
 
-	mutex_lock(&phy->mutex);
-
-	fmt = cal_camerarx_get_pad_format(phy, state,
-					  CAL_CAMERARX_PAD_SINK,
-					  format->which);
+	fmt = v4l2_subdev_get_pad_format(sd, state, CAL_CAMERARX_PAD_SINK);
 	*fmt = format->format;
 
-	fmt = cal_camerarx_get_pad_format(phy, state,
-					  CAL_CAMERARX_PAD_FIRST_SOURCE,
-					  format->which);
+	fmt = v4l2_subdev_get_pad_format(sd, state,
+					 CAL_CAMERARX_PAD_FIRST_SOURCE);
 	*fmt = format->format;
 
-	mutex_unlock(&phy->mutex);
-
 	return 0;
 }
 
@@ -837,7 +780,7 @@ static const struct v4l2_subdev_pad_ops cal_camerarx_pad_ops = {
 	.init_cfg = cal_camerarx_sd_init_cfg,
 	.enum_mbus_code = cal_camerarx_sd_enum_mbus_code,
 	.enum_frame_size = cal_camerarx_sd_enum_frame_size,
-	.get_fmt = cal_camerarx_sd_get_fmt,
+	.get_fmt = v4l2_subdev_get_fmt,
 	.set_fmt = cal_camerarx_sd_set_fmt,
 };
 
@@ -872,7 +815,6 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	phy->instance = instance;
 
 	spin_lock_init(&phy->vc_lock);
-	mutex_init(&phy->mutex);
 
 	phy->res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 						(instance == 0) ?
@@ -881,8 +823,7 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	phy->base = devm_ioremap_resource(cal->dev, phy->res);
 	if (IS_ERR(phy->base)) {
 		cal_err(cal, "failed to ioremap\n");
-		ret = PTR_ERR(phy->base);
-		goto err_destroy_mutex;
+		return ERR_CAST(phy->base);
 	}
 
 	cal_dbg(1, cal, "ioresource %s at %pa - %pa\n",
@@ -890,11 +831,11 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 
 	ret = cal_camerarx_regmap_init(cal, phy);
 	if (ret)
-		goto err_destroy_mutex;
+		return ERR_PTR(ret);
 
 	ret = cal_camerarx_parse_dt(phy);
 	if (ret)
-		goto err_destroy_mutex;
+		return ERR_PTR(ret);
 
 	/* Initialize the V4L2 subdev and media entity. */
 	sd = &phy->subdev;
@@ -913,23 +854,23 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 	if (ret)
 		goto err_node_put;
 
-	ret = cal_camerarx_sd_init_cfg(sd, NULL);
+	ret = v4l2_subdev_init_finalize(sd);
 	if (ret)
 		goto err_entity_cleanup;
 
 	ret = v4l2_device_register_subdev(&cal->v4l2_dev, sd);
 	if (ret)
-		goto err_entity_cleanup;
+		goto err_free_state;
 
 	return phy;
 
+err_free_state:
+	v4l2_subdev_cleanup(sd);
 err_entity_cleanup:
 	media_entity_cleanup(&phy->subdev.entity);
 err_node_put:
 	of_node_put(phy->source_ep_node);
 	of_node_put(phy->source_node);
-err_destroy_mutex:
-	mutex_destroy(&phy->mutex);
 	return ERR_PTR(ret);
 }
 
@@ -939,8 +880,8 @@ void cal_camerarx_destroy(struct cal_camerarx *phy)
 		return;
 
 	v4l2_device_unregister_subdev(&phy->subdev);
+	v4l2_subdev_cleanup(&phy->subdev);
 	media_entity_cleanup(&phy->subdev.entity);
 	of_node_put(phy->source_ep_node);
 	of_node_put(phy->source_node);
-	mutex_destroy(&phy->mutex);
 }
diff --git a/drivers/media/platform/ti/cal/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c
index ed92e23d4b16..a8abcd0fee17 100644
--- a/drivers/media/platform/ti/cal/cal-video.c
+++ b/drivers/media/platform/ti/cal/cal-video.c
@@ -687,21 +687,34 @@ static void cal_release_buffers(struct cal_ctx *ctx,
 static int cal_video_check_format(struct cal_ctx *ctx)
 {
 	const struct v4l2_mbus_framefmt *format;
+	struct v4l2_subdev_state *state;
 	struct media_pad *remote_pad;
+	int ret = 0;
 
 	remote_pad = media_pad_remote_pad_first(&ctx->pad);
 	if (!remote_pad)
 		return -ENODEV;
 
-	format = &ctx->phy->formats[remote_pad->index];
+	state = v4l2_subdev_lock_and_get_active_state(&ctx->phy->subdev);
+
+	format = v4l2_subdev_get_pad_format(&ctx->phy->subdev, state, remote_pad->index);
+	if (!format) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	if (ctx->fmtinfo->code != format->code ||
 	    ctx->v_fmt.fmt.pix.height != format->height ||
 	    ctx->v_fmt.fmt.pix.width != format->width ||
-	    ctx->v_fmt.fmt.pix.field != format->field)
-		return -EPIPE;
+	    ctx->v_fmt.fmt.pix.field != format->field) {
+		ret = -EPIPE;
+		goto out;
+	}
 
-	return 0;
+out:
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
 }
 
 static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
diff --git a/drivers/media/platform/ti/cal/cal.h b/drivers/media/platform/ti/cal/cal.h
index de73d6d21b6f..55d4736fed18 100644
--- a/drivers/media/platform/ti/cal/cal.h
+++ b/drivers/media/platform/ti/cal/cal.h
@@ -177,7 +177,6 @@ struct cal_camerarx {
 
 	struct v4l2_subdev	subdev;
 	struct media_pad	pads[CAL_CAMERARX_NUM_PADS];
-	struct v4l2_mbus_framefmt	formats[CAL_CAMERARX_NUM_PADS];
 
 	/* protects the vc_* fields below */
 	spinlock_t		vc_lock;
@@ -185,13 +184,6 @@ struct cal_camerarx {
 	u16			vc_frame_number[4];
 	u32			vc_sequence[4];
 
-	/*
-	 * Lock for camerarx ops. Protects:
-	 * - formats
-	 * - enable_count
-	 */
-	struct mutex		mutex;
-
 	unsigned int		enable_count;
 };
 
-- 
2.34.1

[PATCH v4 4/4] media: ti: cal: Implement get_frame_desc for camera-rx

[Tomi Valkeinen]

CAL uses get_frame_desc to get the VC and DT for the incoming CSI-2
stream, but does it in a bit hacky way. Clean this up by implementing
.get_frame_desc to camera-rx, and calling that from cal.c.

No functional change intended.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/platform/ti/cal/cal-camerarx.c | 62 +++++++++++---------
 drivers/media/platform/ti/cal/cal.c          | 30 ++++------
 drivers/media/platform/ti/cal/cal.h          |  2 -
 3 files changed, 47 insertions(+), 47 deletions(-)

diff --git a/drivers/media/platform/ti/cal/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c
index bc09c3f1446d..1a4273bbe752 100644
--- a/drivers/media/platform/ti/cal/cal-camerarx.c
+++ b/drivers/media/platform/ti/cal/cal-camerarx.c
@@ -589,33 +589,6 @@ static int cal_camerarx_parse_dt(struct cal_camerarx *phy)
 	return ret;
 }
 
-int cal_camerarx_get_remote_frame_desc(struct cal_camerarx *phy,
-				       struct v4l2_mbus_frame_desc *desc)
-{
-	struct media_pad *pad;
-	int ret;
-
-	if (!phy->source)
-		return -EPIPE;
-
-	pad = media_pad_remote_pad_first(&phy->pads[CAL_CAMERARX_PAD_SINK]);
-	if (!pad)
-		return -EPIPE;
-
-	ret = v4l2_subdev_call(phy->source, pad, get_frame_desc, pad->index,
-			       desc);
-	if (ret)
-		return ret;
-
-	if (desc->type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
-		dev_err(phy->cal->dev,
-			"Frame descriptor does not describe CSI-2 link");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 /* ------------------------------------------------------------------
  *	V4L2 Subdev Operations
  * ------------------------------------------------------------------
@@ -772,6 +745,40 @@ static int cal_camerarx_sd_init_cfg(struct v4l2_subdev *sd,
 	return cal_camerarx_sd_set_fmt(sd, state, &format);
 }
 
+static int cal_camerarx_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+				       struct v4l2_mbus_frame_desc *fd)
+{
+	struct cal_camerarx *phy = to_cal_camerarx(sd);
+	struct v4l2_mbus_frame_desc remote_desc;
+	const struct media_pad *remote_pad;
+	int ret;
+
+	remote_pad = media_pad_remote_pad_first(&phy->pads[CAL_CAMERARX_PAD_SINK]);
+	if (!remote_pad)
+		return -EPIPE;
+
+	ret = v4l2_subdev_call(phy->source, pad, get_frame_desc,
+			       remote_pad->index, &remote_desc);
+	if (ret)
+		return ret;
+
+	if (remote_desc.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
+		cal_err(phy->cal,
+			"Frame descriptor does not describe CSI-2 link");
+		return -EINVAL;
+	}
+
+	if (remote_desc.num_entries > 1)
+		cal_err(phy->cal,
+			"Multiple streams not supported in remote frame descriptor, using the first one\n");
+
+	fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+	fd->num_entries = 1;
+	fd->entry[0] = remote_desc.entry[0];
+
+	return 0;
+}
+
 static const struct v4l2_subdev_video_ops cal_camerarx_video_ops = {
 	.s_stream = cal_camerarx_sd_s_stream,
 };
@@ -782,6 +789,7 @@ static const struct v4l2_subdev_pad_ops cal_camerarx_pad_ops = {
 	.enum_frame_size = cal_camerarx_sd_enum_frame_size,
 	.get_fmt = v4l2_subdev_get_fmt,
 	.set_fmt = cal_camerarx_sd_set_fmt,
+	.get_frame_desc = cal_camerarx_get_frame_desc,
 };
 
 static const struct v4l2_subdev_ops cal_camerarx_subdev_ops = {
diff --git a/drivers/media/platform/ti/cal/cal.c b/drivers/media/platform/ti/cal/cal.c
index 18d86f6ae809..3c74e461fc50 100644
--- a/drivers/media/platform/ti/cal/cal.c
+++ b/drivers/media/platform/ti/cal/cal.c
@@ -446,30 +446,24 @@ static bool cal_ctx_wr_dma_stopped(struct cal_ctx *ctx)
 }
 
 static int
-cal_get_remote_frame_desc_entry(struct cal_camerarx *phy,
+cal_get_remote_frame_desc_entry(struct cal_ctx *ctx,
 				struct v4l2_mbus_frame_desc_entry *entry)
 {
 	struct v4l2_mbus_frame_desc fd;
+	struct media_pad *phy_source_pad;
 	int ret;
 
-	ret = cal_camerarx_get_remote_frame_desc(phy, &fd);
-	if (ret) {
-		if (ret != -ENOIOCTLCMD)
-			dev_err(phy->cal->dev,
-				"Failed to get remote frame desc: %d\n", ret);
-		return ret;
-	}
-
-	if (fd.num_entries == 0) {
-		dev_err(phy->cal->dev,
-			"No streams found in the remote frame descriptor\n");
-
+	phy_source_pad = media_pad_remote_pad_first(&ctx->pad);
+	if (!phy_source_pad)
 		return -ENODEV;
-	}
 
-	if (fd.num_entries > 1)
-		dev_dbg(phy->cal->dev,
-			"Multiple streams not supported in remote frame descriptor, using the first one\n");
+	ret = v4l2_subdev_call(&ctx->phy->subdev, pad, get_frame_desc,
+			       phy_source_pad->index, &fd);
+	if (ret)
+		return ret;
+
+	if (fd.num_entries != 1)
+		return -EINVAL;
 
 	*entry = fd.entry[0];
 
@@ -481,7 +475,7 @@ int cal_ctx_prepare(struct cal_ctx *ctx)
 	struct v4l2_mbus_frame_desc_entry entry;
 	int ret;
 
-	ret = cal_get_remote_frame_desc_entry(ctx->phy, &entry);
+	ret = cal_get_remote_frame_desc_entry(ctx, &entry);
 
 	if (ret == -ENOIOCTLCMD) {
 		ctx->vc = 0;
diff --git a/drivers/media/platform/ti/cal/cal.h b/drivers/media/platform/ti/cal/cal.h
index 55d4736fed18..0856297adc0b 100644
--- a/drivers/media/platform/ti/cal/cal.h
+++ b/drivers/media/platform/ti/cal/cal.h
@@ -319,8 +319,6 @@ const struct cal_format_info *cal_format_by_code(u32 code);
 
 void cal_quickdump_regs(struct cal_dev *cal);
 
-int cal_camerarx_get_remote_frame_desc(struct cal_camerarx *phy,
-				       struct v4l2_mbus_frame_desc *desc);
 void cal_camerarx_disable(struct cal_camerarx *phy);
 void cal_camerarx_i913_errata(struct cal_camerarx *phy);
 struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
-- 
2.34.1