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Subject[RFC PATCH] media: vimc: Add optimized mode
Date
From: "Lucas A. M. Magalhaes" <lucmaga@gmail.com>

Adds an optimized mode for vimc to generate the frame on the capture
device with the expected configuration.

It adds new set of processor functions that propagates a struct tpg_data
instead of a frame. This struct is used at the end of the pipeline to
generate the expected frame.

It adds the vimc-opt-mode parameter that is used to activate the change
previously explained.

Signed-off-by: Lucas A. M. Magalhães <lucmaga@gmail.com>
---

Hi, I'm finally sending a patch for an optimized patch for vimc.

Helen and Hans, please note that this is still an RFC. I would like to
know if this is more like what you expect for the optimized mode.

Thanks!

drivers/media/platform/vimc/vimc-capture.c | 57 ++++++++++++++++++++-
drivers/media/platform/vimc/vimc-common.h | 9 +++-
drivers/media/platform/vimc/vimc-core.c | 6 +++
drivers/media/platform/vimc/vimc-debayer.c | 27 ++++++++--
drivers/media/platform/vimc/vimc-scaler.c | 35 +++++++++++--
drivers/media/platform/vimc/vimc-sensor.c | 24 +++++++--
drivers/media/platform/vimc/vimc-streamer.c | 2 +-
7 files changed, 144 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c
index 76c015898cfd..7e127cbbc806 100644
--- a/drivers/media/platform/vimc/vimc-capture.c
+++ b/drivers/media/platform/vimc/vimc-capture.c
@@ -8,6 +8,7 @@
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-vmalloc.h>
+#include <media/tpg/v4l2-tpg.h>

#include "vimc-common.h"
#include "vimc-streamer.h"
@@ -18,6 +19,7 @@ struct vimc_cap_device {
struct v4l2_pix_format format;
struct vb2_queue queue;
struct list_head buf_list;
+ struct v4l2_mbus_framefmt mbus_format;
/*
* NOTE: in a real driver, a spin lock must be used to access the
* queue because the frames are generated from a hardware interruption
@@ -30,6 +32,7 @@ struct vimc_cap_device {
u32 sequence;
struct vimc_stream stream;
struct media_pad pad;
+ u8 *frame;
};

static const struct v4l2_pix_format fmt_default = {
@@ -344,7 +347,7 @@ void vimc_cap_rm(struct vimc_device *vimc, struct vimc_ent_device *ved)
}

static void *vimc_cap_process_frame(struct vimc_ent_device *ved,
- const void *frame)
+ void *frame)
{
struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
ved);
@@ -382,6 +385,45 @@ static void *vimc_cap_process_frame(struct vimc_ent_device *ved,
return NULL;
}

+static void *vimc_cap_process_tpg(struct vimc_ent_device *ved,
+ void *sink_tpg)
+{
+ struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
+ ved);
+ struct vimc_cap_buffer *vimc_buf;
+ void *vbuf;
+
+ spin_lock(&vcap->qlock);
+
+ /* Get the first entry of the list */
+ vimc_buf = list_first_entry_or_null(&vcap->buf_list,
+ typeof(*vimc_buf), list);
+ if (!vimc_buf) {
+ spin_unlock(&vcap->qlock);
+ return ERR_PTR(-EAGAIN);
+ }
+
+ /* Remove this entry from the list */
+ list_del(&vimc_buf->list);
+
+ spin_unlock(&vcap->qlock);
+
+ /* Fill the buffer */
+ vimc_buf->vb2.vb2_buf.timestamp = ktime_get_ns();
+ vimc_buf->vb2.sequence = vcap->sequence++;
+ vimc_buf->vb2.field = vcap->format.field;
+
+ vbuf = vb2_plane_vaddr(&vimc_buf->vb2.vb2_buf, 0);
+
+ tpg_fill_plane_buffer((struct tpg_data *)sink_tpg, 0, 0, vbuf);
+
+ /* Set it as ready */
+ vb2_set_plane_payload(&vimc_buf->vb2.vb2_buf, 0,
+ vcap->format.sizeimage);
+ vb2_buffer_done(&vimc_buf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
+ return NULL;
+}
+
struct vimc_ent_device *vimc_cap_add(struct vimc_device *vimc,
const char *vcfg_name)
{
@@ -441,7 +483,18 @@ struct vimc_ent_device *vimc_cap_add(struct vimc_device *vimc,

/* Fill the vimc_ent_device struct */
vcap->ved.ent = &vcap->vdev.entity;
- vcap->ved.process_frame = vimc_cap_process_frame;
+
+ switch(vimc_op_mode) {
+ case VIMC_OP_MODE_FRAME:
+ vcap->ved.process_data = vimc_cap_process_frame;
+ break;
+ case VIMC_OP_MODE_OPTMIZED:
+ vcap->ved.process_data = vimc_cap_process_tpg;
+ break;
+ default:
+ vcap->ved.process_data = vimc_cap_process_frame;
+ break;
+ }
vcap->ved.vdev_get_format = vimc_cap_get_format;
vcap->ved.dev = &vimc->pdev.dev;

diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 87eb8259c2a8..9b48b2f34f34 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -15,6 +15,11 @@

#define VIMC_PDEV_NAME "vimc"

+#define VIMC_OP_MODE_FRAME 1
+#define VIMC_OP_MODE_OPTMIZED 2
+
+extern unsigned int vimc_op_mode;
+
/* VIMC-specific controls */
#define VIMC_CID_VIMC_BASE (0x00f00000 | 0xf000)
#define VIMC_CID_VIMC_CLASS (0x00f00000 | 1)
@@ -97,8 +102,8 @@ struct vimc_pix_map {
struct vimc_ent_device {
struct device *dev;
struct media_entity *ent;
- void * (*process_frame)(struct vimc_ent_device *ved,
- const void *frame);
+ void * (*process_data)(struct vimc_ent_device *ved,
+ void *data);
void (*vdev_get_format)(struct vimc_ent_device *ved,
struct v4l2_pix_format *fmt);
};
diff --git a/drivers/media/platform/vimc/vimc-core.c b/drivers/media/platform/vimc/vimc-core.c
index 97a272f3350a..9acf006c7b26 100644
--- a/drivers/media/platform/vimc/vimc-core.c
+++ b/drivers/media/platform/vimc/vimc-core.c
@@ -23,6 +23,10 @@
.flags = link_flags, \
}

+unsigned int vimc_op_mode = VIMC_OP_MODE_FRAME;
+module_param(vimc_op_mode, uint, 0000);
+MODULE_PARM_DESC(vimc_op_mode, " the operation mode");
+
/* Structure which describes links between entities */
struct vimc_ent_link {
unsigned int src_ent;
@@ -275,6 +279,8 @@ static int vimc_probe(struct platform_device *pdev)
media_device_init(&vimc->mdev);

ret = vimc_register_devices(vimc);
+ dev_err(&pdev->dev, "OP MODE %d", vimc_op_mode);
+
if (ret) {
media_device_cleanup(&vimc->mdev);
return ret;
diff --git a/drivers/media/platform/vimc/vimc-debayer.c b/drivers/media/platform/vimc/vimc-debayer.c
index 5d1b67d684bb..793953dd499b 100644
--- a/drivers/media/platform/vimc/vimc-debayer.c
+++ b/drivers/media/platform/vimc/vimc-debayer.c
@@ -12,6 +12,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-subdev.h>
+#include <media/tpg/v4l2-tpg.h>

#include "vimc-common.h"

@@ -455,7 +456,7 @@ static void vimc_deb_calc_rgb_sink(struct vimc_deb_device *vdeb,
}

static void *vimc_deb_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+ void *sink_frame)
{
struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
ved);
@@ -494,6 +495,14 @@ static const struct v4l2_ctrl_ops vimc_deb_ctrl_ops = {
.s_ctrl = vimc_deb_s_ctrl,
};

+static void *vimc_deb_process_tpg(struct vimc_ent_device *ved,
+ void *sink_tpg)
+{
+ //TODO: I dont know what to do here actually
+ ((struct tpg_data *)sink_tpg)->color_enc = TGP_COLOR_ENC_RGB;
+ return sink_tpg;
+}
+
static void vimc_deb_release(struct v4l2_subdev *sd)
{
struct vimc_deb_device *vdeb =
@@ -568,9 +577,19 @@ struct vimc_ent_device *vimc_deb_add(struct vimc_device *vimc,
if (ret)
goto err_free_hdl;

- vdeb->ved.process_frame = vimc_deb_process_frame;
- vdeb->ved.dev = &vimc->pdev.dev;
- vdeb->mean_win_size = vimc_deb_ctrl_mean_win_size.def;
+ vdeb->ved.process_data = vimc_deb_process_frame;
+ switch(vimc_op_mode) {
+ case VIMC_OP_MODE_FRAME:
+ vdeb->ved.process_data = vimc_deb_process_frame;
+ break;
+ case VIMC_OP_MODE_OPTMIZED:
+ vdeb->ved.process_data = vimc_deb_process_tpg;
+ break;
+ default:
+ vdeb->ved.process_data = vimc_deb_process_frame;
+ break;
+ }
+ vdeb->dev = &vimc->pdev.dev;

/* Initialize the frame format */
vdeb->sink_fmt = sink_fmt_default;
diff --git a/drivers/media/platform/vimc/vimc-scaler.c b/drivers/media/platform/vimc/vimc-scaler.c
index 2f88a7d9d67b..eed35400090d 100644
--- a/drivers/media/platform/vimc/vimc-scaler.c
+++ b/drivers/media/platform/vimc/vimc-scaler.c
@@ -9,6 +9,7 @@
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
#include <media/v4l2-subdev.h>
+#include <media/tpg/v4l2-tpg.h>

#include "vimc-common.h"

@@ -317,7 +318,7 @@ static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
}

static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+ void *sink_frame)
{
struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
ved);
@@ -331,10 +332,26 @@ static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
return vsca->src_frame;
};

+static void *vimc_sca_process_tpg(struct vimc_ent_device *ved,
+ void *sink_tpg)
+{
+ struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
+ ved);
+ const struct vimc_pix_map *vpix =
+ vimc_pix_map_by_code(vsca->sink_fmt.code);
+ struct tpg_data *tpg = (struct tpg_data *)sink_tpg;
+ tpg_reset_source(tpg, vsca->sink_fmt.width*sca_mult,
+ vsca->sink_fmt.height*sca_mult, vsca->sink_fmt.field);
+ tpg_s_bytesperline(tpg, 0, vsca->sink_fmt.width * vpix->bpp * sca_mult);
+ tpg_s_buf_height(tpg, tpg->src_height * sca_mult);
+ tpg_s_fourcc(tpg, vpix->pixelformat);
+ return sink_tpg;
+}
+
static void vimc_sca_release(struct v4l2_subdev *sd)
{
struct vimc_sca_device *vsca =
- container_of(sd, struct vimc_sca_device, sd);
+ container_of(sd, struct vimc_sca_device, sd);

media_entity_cleanup(vsca->ved.ent);
kfree(vsca);
@@ -378,8 +395,18 @@ struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
return NULL;
}

- vsca->ved.process_frame = vimc_sca_process_frame;
- vsca->ved.dev = &vimc->pdev.dev;
+ switch(vimc_op_mode) {
+ case VIMC_OP_MODE_FRAME:
+ vsca->ved.process_data = vimc_sca_process_frame;
+ break;
+ case VIMC_OP_MODE_OPTMIZED:
+ vsca->ved.process_data = vimc_sca_process_tpg;
+ break;
+ default:
+ vsca->ved.process_data = vimc_sca_process_frame;
+ break;
+ }
+ vsca->dev = &vimc->pdev.dev;

/* Initialize the frame format */
vsca->sink_fmt = sink_fmt_default;
diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
index 32380f504591..0305e2c693c6 100644
--- a/drivers/media/platform/vimc/vimc-sensor.c
+++ b/drivers/media/platform/vimc/vimc-sensor.c
@@ -183,7 +183,7 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
};

static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+ void *sink_frame)
{
struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
ved);
@@ -192,6 +192,14 @@ static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
return vsen->frame;
}

+static void *vimc_sen_process_tpg(struct vimc_ent_device *ved,
+ void *sink_tpg)
+{
+ struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
+ ved);
+ return &vsen->tpg;
+}
+
static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
{
struct vimc_sen_device *vsen =
@@ -369,8 +377,18 @@ struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
if (ret)
goto err_free_tpg;

- vsen->ved.process_frame = vimc_sen_process_frame;
- vsen->ved.dev = &vimc->pdev.dev;
+ switch(vimc_op_mode) {
+ case VIMC_OP_MODE_FRAME:
+ vsen->ved.process_data = vimc_sen_process_frame;
+ break;
+ case VIMC_OP_MODE_OPTMIZED:
+ vsen->ved.process_data = vimc_sen_process_tpg;
+ break;
+ default:
+ vsen->ved.process_data = vimc_sen_process_frame;
+ break;
+ }
+ vsen->dev = &vimc->pdev.dev;

/* Initialize the frame format */
vsen->mbus_format = fmt_default;
diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c
index cd6b55433c9e..5fcf77391434 100644
--- a/drivers/media/platform/vimc/vimc-streamer.c
+++ b/drivers/media/platform/vimc/vimc-streamer.c
@@ -159,7 +159,7 @@ static int vimc_streamer_thread(void *data)
break;

for (i = stream->pipe_size - 1; i >= 0; i--) {
- frame = stream->ved_pipeline[i]->process_frame(
+ frame = stream->ved_pipeline[i]->process_data(
stream->ved_pipeline[i], frame);
if (!frame || IS_ERR(frame))
break;
--
2.24.0
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