media: Revert "media: vimc: propagate pixel format in the stream"

This reverts commit b6c61a6c37317efd7327199bfe24770af3d7e799.

The requested pixelformat is being propagated from the capture to the
tpg in the sensor.

This was a bad design choice, as we start having the following issues:

* We set a pixelformat in the capture;
* We set matching media bus formats in the subdevices pads;
* Link validate looks fine (sizes matches, media bus formats matches);
* Issue: if some of the subdevice doesn't know how to generate the
requested pixelformat in the capture, then stream_on fails. This is bad
because capture says it supports that pixelformat, everything looks
fine, but it is not, and there is no way to find it out through the
links.

This patch was implemented so we could request any pixelformat from the
pipeline regardeless of the media bus format configured between pads.
Not all pixelformat can be mapped into a media bus code (e.g.
multiplanar formats), so with this patch we could request those
pixelformats from the tpg.

Solution: map pixelformats to media bus codes as before, and implement
conversions to other pixelformats in the capture to support multiplanar.

So first step to this solution is to revert this patch.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Lucas A. M. Magalhaes <lucmaga@gmail.com>
Tested-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 38 insertions, 20 deletions

diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 7b4d988b208b..9c2e0e216c6b 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -12,8 +12,6 @@
 #include <media/media-device.h>
 #include <media/v4l2-device.h>
 
-#include "vimc-streamer.h"
-
 #define VIMC_PDEV_NAME "vimc"
 
 /* VIMC-specific controls */
@@ -70,6 +68,23 @@ struct vimc_platform_data {
 };
 
 /**
+ * struct vimc_pix_map - maps media bus code with v4l2 pixel format
+ *
+ * @code:		media bus format code defined by MEDIA_BUS_FMT_* macros
+ * @bbp:		number of bytes each pixel occupies
+ * @pixelformat:	pixel format devined by V4L2_PIX_FMT_* macros
+ *
+ * Struct which matches the MEDIA_BUS_FMT_* codes with the corresponding
+ * V4L2_PIX_FMT_* fourcc pixelformat and its bytes per pixel (bpp)
+ */
+struct vimc_pix_map {
+	unsigned int code;
+	unsigned int bpp;
+	u32 pixelformat;
+	bool bayer;
+};
+
+/**
  * struct vimc_ent_device - core struct that represents a node in the topology
  *
  * @ent:		the pointer to struct media_entity for the node
@@ -90,7 +105,6 @@ struct vimc_platform_data {
 struct vimc_ent_device {
 	struct media_entity *ent;
 	struct media_pad *pads;
-	struct vimc_stream *stream;
 	void * (*process_frame)(struct vimc_ent_device *ved,
 				const void *frame);
 	void (*vdev_get_format)(struct vimc_ent_device *ved,
@@ -98,23 +112,6 @@ struct vimc_ent_device {
 };
 
 /**
- * vimc_mbus_code_supported - helper to check supported mbus codes
- *
- * Helper function to check if mbus code is enumerated by vimc_enum_mbus_code()
- */
-bool vimc_mbus_code_supported(__u32 code);
-
-/**
- * vimc_enum_mbus_code - enumerate mbus codes
- *
- * Helper function to be pluged in .enum_mbus_code from
- * struct v4l2_subdev_pad_ops.
- */
-int vimc_enum_mbus_code(struct v4l2_subdev *sd,
-			struct v4l2_subdev_pad_config *cfg,
-			struct v4l2_subdev_mbus_code_enum *code);
-
-/**
  * vimc_pads_init - initialize pads
  *
  * @num_pads:	number of pads to initialize
@@ -149,6 +146,27 @@ static inline void vimc_pads_cleanup(struct media_pad *pads)
 int vimc_pipeline_s_stream(struct media_entity *ent, int enable);
 
 /**
+ * vimc_pix_map_by_index - get vimc_pix_map struct by its index
+ *
+ * @i:			index of the vimc_pix_map struct in vimc_pix_map_list
+ */
+const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i);
+
+/**
+ * vimc_pix_map_by_code - get vimc_pix_map struct by media bus code
+ *
+ * @code:		media bus format code defined by MEDIA_BUS_FMT_* macros
+ */
+const struct vimc_pix_map *vimc_pix_map_by_code(u32 code);
+
+/**
+ * vimc_pix_map_by_pixelformat - get vimc_pix_map struct by v4l2 pixel format
+ *
+ * @pixelformat:	pixel format devined by V4L2_PIX_FMT_* macros
+ */
+const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat);
+
+/**
  * vimc_ent_sd_register - initialize and register a subdev node
  *
  * @ved:	the vimc_ent_device struct to be initialize