openwrt/target/linux/brcm2708/patches-4.14/950-0367-staging-bcm2835-camera-Skip-ISP-pass-to-eliminate-pa.patch

From 7efa934859d354d8c331d2c99a6126020ce0310d Mon Sep 17 00:00:00 2001
From: Dave Stevenson <6by9@users.noreply.github.com>
Date: Thu, 10 May 2018 12:42:07 -0700
Subject: [PATCH 367/454] staging: bcm2835-camera: Skip ISP pass to eliminate
 padding.

commit dd9bb50522733befceac9cbe0b68f5ad4e5106ff upstream.

Interleaved RGB and single plane YUV formats can be delivered by the
GPU without the secondary step of removing padding, as the
bytesperline field can be set appropriately.

Planar YUV needs the GPU to still remove padding, as there is no way
to report that there is padding between the planes (ie on the height).
The multi-planar formats are NOT applicable, as there is no easy way
to make them contiguous in memory (ie one large allocation that gets
broken up). The whole task is passed across to videobuf2 which has no
notion of that requirement.

v2: Changes by anholt from the downstream driver: Flag two more planar
    formats as needing padding removal, and remove broken userspace
    workaround.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 .../bcm2835-camera/bcm2835-camera.c           | 44 ++++++++++++++-----
 .../bcm2835-camera/mmal-common.h              |  3 ++
 2 files changed, 35 insertions(+), 12 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -88,6 +88,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 12,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 1,
+	 .remove_padding = 1,
 	 },
 	{
 	 .name = "4:2:2, packed, YUYV",
@@ -97,6 +98,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 16,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 2,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "RGB24 (LE)",
@@ -106,6 +108,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 24,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 3,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "JPEG",
@@ -115,6 +118,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 8,
 	 .mmal_component = MMAL_COMPONENT_IMAGE_ENCODE,
 	 .ybbp = 0,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "H264",
@@ -124,6 +128,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 8,
 	 .mmal_component = MMAL_COMPONENT_VIDEO_ENCODE,
 	 .ybbp = 0,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "MJPEG",
@@ -133,6 +138,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 8,
 	 .mmal_component = MMAL_COMPONENT_VIDEO_ENCODE,
 	 .ybbp = 0,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "4:2:2, packed, YVYU",
@@ -142,6 +148,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 16,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 2,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "4:2:2, packed, VYUY",
@@ -151,6 +158,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 16,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 2,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "4:2:2, packed, UYVY",
@@ -160,6 +168,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 16,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 2,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "4:2:0, planar, NV12",
@@ -169,6 +178,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 12,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 1,
+	 .remove_padding = 1,
 	 },
 	{
 	 .name = "RGB24 (BE)",
@@ -178,6 +188,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 24,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 3,
+	 .remove_padding = 0,
 	 },
 	{
 	 .name = "4:2:0, planar, YVU",
@@ -187,6 +198,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 12,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 1,
+	 .remove_padding = 1,
 	 },
 	{
 	 .name = "4:2:0, planar, NV21",
@@ -196,6 +208,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 12,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 1,
+	 .remove_padding = 1,
 	 },
 	{
 	 .name = "RGB32 (BE)",
@@ -205,6 +218,7 @@ static struct mmal_fmt formats[] = {
 	 .depth = 32,
 	 .mmal_component = MMAL_COMPONENT_CAMERA,
 	 .ybbp = 4,
+	 .remove_padding = 0,
 	 },
 };
 
@@ -962,9 +976,19 @@ static int vidioc_try_fmt_vid_cap(struct
 			      &f->fmt.pix.height, MIN_HEIGHT, dev->max_height,
 			      1, 0);
 	f->fmt.pix.bytesperline = f->fmt.pix.width * mfmt->ybbp;
+	if (!mfmt->remove_padding) {
+		int align_mask = ((32 * mfmt->depth) >> 3) - 1;
+		/* GPU isn't removing padding, so stride is aligned to 32 */
+		f->fmt.pix.bytesperline =
+			(f->fmt.pix.bytesperline + align_mask) & ~align_mask;
+		v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
+			 "Not removing padding, so bytes/line = %d, "
+			 "(align_mask %d)\n",
+			 f->fmt.pix.bytesperline, align_mask);
+	}
 
 	/* Image buffer has to be padded to allow for alignment, even though
-	 * we then remove that padding before delivering the buffer.
+	 * we sometimes then remove that padding before delivering the buffer.
 	 */
 	f->fmt.pix.sizeimage = ((f->fmt.pix.height + 15) & ~15) *
 			(((f->fmt.pix.width + 31) & ~31) * mfmt->depth) >> 3;
@@ -997,6 +1021,7 @@ static int mmal_setup_components(struct
 	struct vchiq_mmal_port *port = NULL, *camera_port = NULL;
 	struct vchiq_mmal_component *encode_component = NULL;
 	struct mmal_fmt *mfmt = get_format(f);
+	u32 remove_padding;
 
 	BUG_ON(!mfmt);
 
@@ -1065,6 +1090,12 @@ static int mmal_setup_components(struct
 			camera_port->format.encoding = MMAL_ENCODING_RGB24;
 	}
 
+	remove_padding = mfmt->remove_padding;
+	vchiq_mmal_port_parameter_set(dev->instance,
+				      camera_port,
+				      MMAL_PARAMETER_NO_IMAGE_PADDING,
+				      &remove_padding, sizeof(remove_padding));
+
 	camera_port->format.encoding_variant = 0;
 	camera_port->es.video.width = f->fmt.pix.width;
 	camera_port->es.video.height = f->fmt.pix.height;
@@ -1542,7 +1573,6 @@ static int __init mmal_init(struct bm283
 {
 	int ret;
 	struct mmal_es_format_local *format;
-	u32 bool_true = 1;
 	u32 supported_encodings[MAX_SUPPORTED_ENCODINGS];
 	int param_size;
 	struct vchiq_mmal_component  *camera;
@@ -1626,11 +1656,6 @@ static int __init mmal_init(struct bm283
 	format->es->video.frame_rate.num = 0; /* Rely on fps_range */
 	format->es->video.frame_rate.den = 1;
 
-	vchiq_mmal_port_parameter_set(dev->instance,
-				      &camera->output[MMAL_CAMERA_PORT_VIDEO],
-				      MMAL_PARAMETER_NO_IMAGE_PADDING,
-				      &bool_true, sizeof(bool_true));
-
 	format = &camera->output[MMAL_CAMERA_PORT_CAPTURE].format;
 
 	format->encoding = MMAL_ENCODING_OPAQUE;
@@ -1652,11 +1677,6 @@ static int __init mmal_init(struct bm283
 	dev->capture.enc_profile = V4L2_MPEG_VIDEO_H264_PROFILE_HIGH;
 	dev->capture.enc_level = V4L2_MPEG_VIDEO_H264_LEVEL_4_0;
 
-	vchiq_mmal_port_parameter_set(dev->instance,
-				      &camera->output[MMAL_CAMERA_PORT_CAPTURE],
-				      MMAL_PARAMETER_NO_IMAGE_PADDING,
-				      &bool_true, sizeof(bool_true));
-
 	/* get the preview component ready */
 	ret = vchiq_mmal_component_init(
 			dev->instance, "ril.video_render",
--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-common.h
+++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-common.h
@@ -31,6 +31,9 @@ struct mmal_fmt {
 	int   depth;
 	u32   mmal_component;  /* MMAL component index to be used to encode */
 	u32   ybbp;            /* depth of first Y plane for planar formats */
+	bool  remove_padding;  /* Does the GPU have to remove padding,
+				* or can we do hide padding via bytesperline.
+				*/
 };
 
 /* buffer for one video frame */