[PATCH v5 06/14] staging: media: starfive: Separate buffer be a common file

Changhuang Liang
2024-07-09T08:40:01Z

Buffer operations is not only applicable to capture device, also
can use for output device. So separating it be a common file.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
drivers/staging/media/starfive/camss/Makefile | 1 +
.../staging/media/starfive/camss/stf-buffer.c | 166 ++++++++++++++++++
.../staging/media/starfive/camss/stf-buffer.h | 52 ++++++
.../staging/media/starfive/camss/stf-camss.h | 1 +
.../media/starfive/camss/stf-capture.c | 158 -----------------
.../media/starfive/camss/stf-capture.h | 22 ---
.../staging/media/starfive/camss/stf-video.h | 10 +-
7 files changed, 222 insertions(+), 188 deletions(-)
create mode 100644 drivers/staging/media/starfive/camss/stf-buffer.c
create mode 100644 drivers/staging/media/starfive/camss/stf-buffer.h

diff --git a/drivers/staging/media/starfive/camss/Makefile b/drivers/staging/media/starfive/camss/Makefile
index 005790202e7b..411b45f3fb52 100644
--- a/drivers/staging/media/starfive/camss/Makefile
+++ b/drivers/staging/media/starfive/camss/Makefile
@@ -4,6 +4,7 @@
#

starfive-camss-objs += \
+ stf-buffer.o \
stf-camss.o \
stf-capture.o \
stf-isp.o \
diff --git a/drivers/staging/media/starfive/camss/stf-buffer.c b/drivers/staging/media/starfive/camss/stf-buffer.c
new file mode 100644
index 000000000000..7272b5ab9eb5
--- /dev/null
+++ b/drivers/staging/media/starfive/camss/stf-buffer.c
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive Camera Subsystem - buffer common
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#include "stf-camss.h"
+
+void stf_buf_add_pending(struct stf_v_buf *output,
+ struct stfcamss_buffer *buffer)
+{
+ INIT_LIST_HEAD(&buffer->queue);
+ list_add_tail(&buffer->queue, &output->pending_bufs);
+}
+
+struct stfcamss_buffer *stf_buf_get_pending(struct stf_v_buf *output)
+{
+ struct stfcamss_buffer *buffer = NULL;
+
+ if (!list_empty(&output->pending_bufs)) {
+ buffer = list_first_entry(&output->pending_bufs,
+ struct stfcamss_buffer,
+ queue);
+ list_del(&buffer->queue);
+ }
+
+ return buffer;
+}
+
+void stf_buf_add_ready(struct stf_v_buf *output,
+ struct stfcamss_buffer *buffer)
+{
+ INIT_LIST_HEAD(&buffer->queue);
+ list_add_tail(&buffer->queue, &output->ready_bufs);
+}
+
+struct stfcamss_buffer *stf_buf_get_ready(struct stf_v_buf *output)
+{
+ struct stfcamss_buffer *buffer = NULL;
+
+ if (!list_empty(&output->ready_bufs)) {
+ buffer = list_first_entry(&output->ready_bufs,
+ struct stfcamss_buffer,
+ queue);
+ list_del(&buffer->queue);
+ }
+
+ return buffer;
+}
+
+static void stf_buf_update_on_last(struct stf_v_buf *output)
+{
+ switch (output->state) {
+ case STF_OUTPUT_CONTINUOUS:
+ output->state = STF_OUTPUT_SINGLE;
+ output->active_buf = !output->active_buf;
+ break;
+ case STF_OUTPUT_SINGLE:
+ output->state = STF_OUTPUT_STOPPING;
+ break;
+ default:
+ break;
+ }
+}
+
+static void stf_buf_update_on_next(struct stf_v_buf *output)
+{
+ switch (output->state) {
+ case STF_OUTPUT_CONTINUOUS:
+ output->active_buf = !output->active_buf;
+ break;
+ case STF_OUTPUT_SINGLE:
+ default:
+ break;
+ }
+}
+
+void stf_buf_flush(struct stf_v_buf *output, enum vb2_buffer_state state)
+{
+ struct stfcamss_buffer *buf;
+ struct stfcamss_buffer *t;
+
+ list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+ list_for_each_entry_safe(buf, t, &output->ready_bufs, queue) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+}
+
+struct stfcamss_buffer *stf_change_buffer(struct stf_v_buf *output)
+{
+ struct stf_capture *cap = container_of(output, struct stf_capture,
+ buffers);
+ struct stfcamss *stfcamss = cap->video.stfcamss;
+ struct stfcamss_buffer *ready_buf;
+ unsigned long flags;
+ u32 active_index;
+
+ if (output->state == STF_OUTPUT_OFF ||
+ output->state == STF_OUTPUT_STOPPING ||
+ output->state == STF_OUTPUT_RESERVED ||
+ output->state == STF_OUTPUT_IDLE)
+ return NULL;
+
+ spin_lock_irqsave(&output->lock, flags);
+
+ active_index = output->active_buf;
+
+ ready_buf = output->buf[active_index];
+ if (!ready_buf) {
+ dev_dbg(stfcamss->dev, "missing ready buf %d %d.\n",
+ active_index, output->state);
+ active_index = !active_index;
+ ready_buf = output->buf[active_index];
+ if (!ready_buf) {
+ dev_dbg(stfcamss->dev,
+ "missing ready buf2 %d %d.\n",
+ active_index, output->state);
+ goto out_unlock;
+ }
+ }
+
+ /* Get next buffer */
+ output->buf[active_index] = stf_buf_get_pending(output);
+ if (!output->buf[active_index])
+ stf_buf_update_on_last(output);
+ else
+ stf_buf_update_on_next(output);
+
+ if (output->state == STF_OUTPUT_STOPPING)
+ output->last_buffer = ready_buf;
+ else
+ stf_buf_add_ready(output, ready_buf);
+
+out_unlock:
+ spin_unlock_irqrestore(&output->lock, flags);
+
+ return output->buf[active_index];
+}
+
+struct stfcamss_buffer *stf_buf_done(struct stf_v_buf *output)
+{
+ struct stfcamss_buffer *ready_buf;
+ u64 ts = ktime_get_ns();
+ unsigned long flags;
+
+ if (output->state == STF_OUTPUT_OFF ||
+ output->state == STF_OUTPUT_RESERVED)
+ return NULL;
+
+ spin_lock_irqsave(&output->lock, flags);
+
+ ready_buf = stf_buf_get_ready(output);
+ if (ready_buf) {
+ ready_buf->vb.vb2_buf.timestamp = ts;
+ ready_buf->vb.sequence = output->sequence++;
+ }
+
+ spin_unlock_irqrestore(&output->lock, flags);
+
+ return ready_buf;
+}
diff --git a/drivers/staging/media/starfive/camss/stf-buffer.h b/drivers/staging/media/starfive/camss/stf-buffer.h
new file mode 100644
index 000000000000..9d1670fb05ed
--- /dev/null
+++ b/drivers/staging/media/starfive/camss/stf-buffer.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * StarFive Camera Subsystem - buffer common
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#ifndef STF_BUFFER_H
+#define STF_BUFFER_H
+
+#include <linux/list.h>
+#include <media/videobuf2-v4l2.h>
+
+enum stf_v_state {
+ STF_OUTPUT_OFF,
+ STF_OUTPUT_RESERVED,
+ STF_OUTPUT_SINGLE,
+ STF_OUTPUT_CONTINUOUS,
+ STF_OUTPUT_IDLE,
+ STF_OUTPUT_STOPPING
+};
+
+struct stfcamss_buffer {
+ struct vb2_v4l2_buffer vb;
+ dma_addr_t addr[2];
+ struct list_head queue;
+};
+
+struct stf_v_buf {
+ int active_buf;
+ struct stfcamss_buffer *buf[2];
+ struct stfcamss_buffer *last_buffer;
+ struct list_head pending_bufs;
+ struct list_head ready_bufs;
+ enum stf_v_state state;
+ unsigned int sequence;
+ /* protects the above member variables */
+ spinlock_t lock;
+ atomic_t frame_skip;
+};
+
+void stf_buf_add_pending(struct stf_v_buf *output,
+ struct stfcamss_buffer *buffer);
+struct stfcamss_buffer *stf_buf_get_pending(struct stf_v_buf *output);
+void stf_buf_add_ready(struct stf_v_buf *output,
+ struct stfcamss_buffer *buffer);
+struct stfcamss_buffer *stf_buf_get_ready(struct stf_v_buf *output);
+void stf_buf_flush(struct stf_v_buf *output, enum vb2_buffer_state state);
+struct stfcamss_buffer *stf_change_buffer(struct stf_v_buf *output);
+struct stfcamss_buffer *stf_buf_done(struct stf_v_buf *output);
+
+#endif /* STF_BUFFER_H */
diff --git a/drivers/staging/media/starfive/camss/stf-camss.h b/drivers/staging/media/starfive/camss/stf-camss.h
index e2b0cfb437bd..ae49c7031ab7 100644
--- a/drivers/staging/media/starfive/camss/stf-camss.h
+++ b/drivers/staging/media/starfive/camss/stf-camss.h
@@ -18,6 +18,7 @@
#include <media/v4l2-async.h>
#include <media/v4l2-device.h>

+#include "stf-buffer.h"
#include "stf-isp.h"
#include "stf-capture.h"

diff --git a/drivers/staging/media/starfive/camss/stf-capture.c b/drivers/staging/media/starfive/camss/stf-capture.c
index 494e56e731f0..696d79920713 100644
--- a/drivers/staging/media/starfive/camss/stf-capture.c
+++ b/drivers/staging/media/starfive/camss/stf-capture.c
@@ -93,20 +93,6 @@ static void stf_init_addrs(struct stfcamss_video *video)
stf_set_yuv_addr(video->stfcamss, addr0, addr1);
}

-static struct stfcamss_buffer *stf_buf_get_pending(struct stf_v_buf *output)
-{
- struct stfcamss_buffer *buffer = NULL;
-
- if (!list_empty(&output->pending_bufs)) {
- buffer = list_first_entry(&output->pending_bufs,
- struct stfcamss_buffer,
- queue);
- list_del(&buffer->queue);
- }
-
- return buffer;
-}
-
static void stf_cap_s_cfg(struct stfcamss_video *video)
{
struct stf_capture *cap = to_stf_capture(video);
@@ -263,61 +249,6 @@ static void stf_capture_init(struct stfcamss *stfcamss, struct stf_capture *cap)
}
}

-static void stf_buf_add_ready(struct stf_v_buf *output,
- struct stfcamss_buffer *buffer)
-{
- INIT_LIST_HEAD(&buffer->queue);
- list_add_tail(&buffer->queue, &output->ready_bufs);
-}
-
-static struct stfcamss_buffer *stf_buf_get_ready(struct stf_v_buf *output)
-{
- struct stfcamss_buffer *buffer = NULL;
-
- if (!list_empty(&output->ready_bufs)) {
- buffer = list_first_entry(&output->ready_bufs,
- struct stfcamss_buffer,
- queue);
- list_del(&buffer->queue);
- }
-
- return buffer;
-}
-
-static void stf_buf_add_pending(struct stf_v_buf *output,
- struct stfcamss_buffer *buffer)
-{
- INIT_LIST_HEAD(&buffer->queue);
- list_add_tail(&buffer->queue, &output->pending_bufs);
-}
-
-static void stf_buf_update_on_last(struct stf_v_buf *output)
-{
- switch (output->state) {
- case STF_OUTPUT_CONTINUOUS:
- output->state = STF_OUTPUT_SINGLE;
- output->active_buf = !output->active_buf;
- break;
- case STF_OUTPUT_SINGLE:
- output->state = STF_OUTPUT_STOPPING;
- break;
- default:
- break;
- }
-}
-
-static void stf_buf_update_on_next(struct stf_v_buf *output)
-{
- switch (output->state) {
- case STF_OUTPUT_CONTINUOUS:
- output->active_buf = !output->active_buf;
- break;
- case STF_OUTPUT_SINGLE:
- default:
- break;
- }
-}
-
static void stf_buf_update_on_new(struct stfcamss_video *video,
struct stfcamss_buffer *new_buf)
{
@@ -353,95 +284,6 @@ static void stf_buf_update_on_new(struct stfcamss_video *video,
}
}

-static void stf_buf_flush(struct stf_v_buf *output, enum vb2_buffer_state state)
-{
- struct stfcamss_buffer *buf;
- struct stfcamss_buffer *t;
-
- list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
- vb2_buffer_done(&buf->vb.vb2_buf, state);
- list_del(&buf->queue);
- }
- list_for_each_entry_safe(buf, t, &output->ready_bufs, queue) {
- vb2_buffer_done(&buf->vb.vb2_buf, state);
- list_del(&buf->queue);
- }
-}
-
-static struct stfcamss_buffer *stf_buf_done(struct stf_v_buf *output)
-{
- struct stfcamss_buffer *ready_buf;
- u64 ts = ktime_get_ns();
- unsigned long flags;
-
- if (output->state == STF_OUTPUT_OFF ||
- output->state == STF_OUTPUT_RESERVED)
- return NULL;
-
- spin_lock_irqsave(&output->lock, flags);
-
- ready_buf = stf_buf_get_ready(output);
- if (ready_buf) {
- ready_buf->vb.vb2_buf.timestamp = ts;
- ready_buf->vb.sequence = output->sequence++;
- }
-
- spin_unlock_irqrestore(&output->lock, flags);
-
- return ready_buf;
-}
-
-static struct stfcamss_buffer *stf_change_buffer(struct stf_v_buf *output)
-{
- struct stf_capture *cap = container_of(output, struct stf_capture,
- buffers);
- struct stfcamss *stfcamss = cap->video.stfcamss;
- struct stfcamss_buffer *ready_buf;
- unsigned long flags;
- u32 active_index;
-
- if (output->state == STF_OUTPUT_OFF ||
- output->state == STF_OUTPUT_STOPPING ||
- output->state == STF_OUTPUT_RESERVED ||
- output->state == STF_OUTPUT_IDLE)
- return NULL;
-
- spin_lock_irqsave(&output->lock, flags);
-
- active_index = output->active_buf;
-
- ready_buf = output->buf[active_index];
- if (!ready_buf) {
- dev_dbg(stfcamss->dev, "missing ready buf %d %d.\n",
- active_index, output->state);
- active_index = !active_index;
- ready_buf = output->buf[active_index];
- if (!ready_buf) {
- dev_dbg(stfcamss->dev,
- "missing ready buf2 %d %d.\n",
- active_index, output->state);
- goto out_unlock;
- }
- }
-
- /* Get next buffer */
- output->buf[active_index] = stf_buf_get_pending(output);
- if (!output->buf[active_index])
- stf_buf_update_on_last(output);
- else
- stf_buf_update_on_next(output);
-
- if (output->state == STF_OUTPUT_STOPPING)
- output->last_buffer = ready_buf;
- else
- stf_buf_add_ready(output, ready_buf);
-
-out_unlock:
- spin_unlock_irqrestore(&output->lock, flags);
-
- return output->buf[active_index];
-}
-
irqreturn_t stf_wr_irq_handler(int irq, void *priv)
{
struct stfcamss *stfcamss = priv;
diff --git a/drivers/staging/media/starfive/camss/stf-capture.h b/drivers/staging/media/starfive/camss/stf-capture.h
index 2f9740b7e500..fe2489d55090 100644
--- a/drivers/staging/media/starfive/camss/stf-capture.h
+++ b/drivers/staging/media/starfive/camss/stf-capture.h
@@ -48,28 +48,6 @@
#define U0_VIN_P_I_MIPI_HAEDER_EN0_MASK BIT(12)
#define U0_VIN_PIX_NUM_MASK GENMASK(16, 13)

-enum stf_v_state {
- STF_OUTPUT_OFF,
- STF_OUTPUT_RESERVED,
- STF_OUTPUT_SINGLE,
- STF_OUTPUT_CONTINUOUS,
- STF_OUTPUT_IDLE,
- STF_OUTPUT_STOPPING
-};
-
-struct stf_v_buf {
- int active_buf;
- struct stfcamss_buffer *buf[2];
- struct stfcamss_buffer *last_buffer;
- struct list_head pending_bufs;
- struct list_head ready_bufs;
- enum stf_v_state state;
- unsigned int sequence;
- /* protects the above member variables */
- spinlock_t lock;
- atomic_t frame_skip;
-};
-
struct stf_capture {
struct stfcamss_video video;
struct stf_v_buf buffers;
diff --git a/drivers/staging/media/starfive/camss/stf-video.h b/drivers/staging/media/starfive/camss/stf-video.h
index 8052b77e3ad8..59799b65cbe5 100644
--- a/drivers/staging/media/starfive/camss/stf-video.h
+++ b/drivers/staging/media/starfive/camss/stf-video.h
@@ -10,13 +10,13 @@
#ifndef STF_VIDEO_H
#define STF_VIDEO_H

-#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
-#include <media/videobuf2-v4l2.h>
+
+#include "stf-buffer.h"

#define STFCAMSS_FRAME_MIN_WIDTH 64
#define STFCAMSS_FRAME_MAX_WIDTH 1920
@@ -40,12 +40,6 @@ enum stf_capture_type {
STF_CAPTURE_NUM,
};

-struct stfcamss_buffer {
- struct vb2_v4l2_buffer vb;
- dma_addr_t addr[2];
- struct list_head queue;
-};
-
struct fract {
u8 numerator;
u8 denominator;
--
2.25.1