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openwrt/target/linux/bcm27xx/patches-5.4/950-0810-media-bcm2835-unic...

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From 30351afb528e439a48960443c028b6b9c236c55a Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Tue, 23 Jun 2020 15:14:05 +0100
Subject: [PATCH] media: bcm2835-unicam: Fixup review comments from
Hans.
Updates the driver based on the upstream review comments from
Hans Verkuil at https://patchwork.linuxtv.org/patch/63531/
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/media/platform/bcm2835/Kconfig | 12 ++--
.../media/platform/bcm2835/bcm2835-unicam.c | 70 ++++++++-----------
2 files changed, 39 insertions(+), 43 deletions(-)
--- a/drivers/media/platform/bcm2835/Kconfig
+++ b/drivers/media/platform/bcm2835/Kconfig
@@ -1,15 +1,19 @@
# Broadcom VideoCore4 V4L2 camera support
config VIDEO_BCM2835_UNICAM
- tristate "Broadcom BCM2835 Unicam video capture driver"
+ tristate "Broadcom BCM283x/BCM271x Unicam video capture driver"
depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER
depends on ARCH_BCM2835 || COMPILE_TEST
select VIDEOBUF2_DMA_CONTIG
select V4L2_FWNODE
help
- Say Y here to enable support for the BCM2835 CSI-2 receiver. This is a
- V4L2 driver that controls the CSI-2 receiver directly, independently
- from the VC4 firmware.
+ Say Y here to enable support for the BCM283x/BCM271x CSI-2 receiver.
+ This is a V4L2 driver that controls the CSI-2 receiver directly,
+ independently from the VC4 firmware.
+ This driver is mutually exclusive with the use of bcm2835-camera. The
+ firmware will disable all access to the peripheral from within the
+ firmware if it finds a DT node using it, and bcm2835-camera will
+ therefore fail to probe.
To compile this driver as a module, choose M here. The module will be
called bcm2835-unicam.
--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * BCM2835 Unicam Capture Driver
+ * BCM283x / BCM271x Unicam Capture Driver
*
* Copyright (C) 2017-2020 - Raspberry Pi (Trading) Ltd.
*
@@ -554,9 +554,8 @@ static const struct unicam_fmt *find_for
return NULL;
}
-static inline unsigned int bytes_per_line(u32 width,
- const struct unicam_fmt *fmt,
- u32 v4l2_fourcc)
+static unsigned int bytes_per_line(u32 width, const struct unicam_fmt *fmt,
+ u32 v4l2_fourcc)
{
if (v4l2_fourcc == fmt->repacked_fourcc)
/* Repacking always goes to 16bpp */
@@ -708,7 +707,7 @@ static void unicam_wr_dma_addr(struct un
}
}
-static inline unsigned int unicam_get_lines_done(struct unicam_device *dev)
+static unsigned int unicam_get_lines_done(struct unicam_device *dev)
{
dma_addr_t start_addr, cur_addr;
unsigned int stride = dev->node[IMAGE_PAD].v_fmt.fmt.pix.bytesperline;
@@ -722,7 +721,7 @@ static inline unsigned int unicam_get_li
return (unsigned int)(cur_addr - start_addr) / stride;
}
-static inline void unicam_schedule_next_buffer(struct unicam_node *node)
+static void unicam_schedule_next_buffer(struct unicam_node *node)
{
struct unicam_device *dev = node->dev;
struct unicam_buffer *buf;
@@ -741,7 +740,7 @@ static inline void unicam_schedule_next_
unicam_wr_dma_addr(dev, addr, size, node->pad_id);
}
-static inline void unicam_schedule_dummy_buffer(struct unicam_node *node)
+static void unicam_schedule_dummy_buffer(struct unicam_node *node)
{
struct unicam_device *dev = node->dev;
@@ -753,8 +752,8 @@ static inline void unicam_schedule_dummy
node->next_frm = NULL;
}
-static inline void unicam_process_buffer_complete(struct unicam_node *node,
- unsigned int sequence)
+static void unicam_process_buffer_complete(struct unicam_node *node,
+ unsigned int sequence)
{
node->cur_frm->vb.field = node->m_fmt.field;
node->cur_frm->vb.sequence = sequence;
@@ -762,16 +761,6 @@ static inline void unicam_process_buffer
vb2_buffer_done(&node->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
-static bool unicam_all_nodes_streaming(struct unicam_device *dev)
-{
- bool ret;
-
- ret = dev->node[IMAGE_PAD].open && dev->node[IMAGE_PAD].streaming;
- ret &= !dev->node[METADATA_PAD].open ||
- dev->node[METADATA_PAD].streaming;
- return ret;
-}
-
static void unicam_queue_event_sof(struct unicam_device *unicam)
{
struct v4l2_event event = {
@@ -894,8 +883,8 @@ static int unicam_querycap(struct file *
struct unicam_node *node = video_drvdata(file);
struct unicam_device *dev = node->dev;
- strlcpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
- strlcpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
+ strscpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
+ strscpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info),
"platform:%s", dev_name(&dev->pdev->dev));
@@ -988,8 +977,8 @@ static int unicam_g_fmt_vid_cap(struct f
return 0;
}
-static
-const struct unicam_fmt *get_first_supported_format(struct unicam_device *dev)
+static const struct unicam_fmt *
+get_first_supported_format(struct unicam_device *dev)
{
struct v4l2_subdev_mbus_code_enum mbus_code;
const struct unicam_fmt *fmt = NULL;
@@ -1579,7 +1568,8 @@ static void unicam_disable(struct unicam
clk_write(dev, 0);
}
-static void unicam_return_buffers(struct unicam_node *node)
+static void unicam_return_buffers(struct unicam_node *node,
+ enum vb2_buffer_state state)
{
struct unicam_buffer *buf, *tmp;
unsigned long flags;
@@ -1587,15 +1577,15 @@ static void unicam_return_buffers(struct
spin_lock_irqsave(&node->dma_queue_lock, flags);
list_for_each_entry_safe(buf, tmp, &node->dma_queue, list) {
list_del(&buf->list);
- vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
}
if (node->cur_frm)
vb2_buffer_done(&node->cur_frm->vb.vb2_buf,
- VB2_BUF_STATE_ERROR);
+ state);
if (node->next_frm && node->cur_frm != node->next_frm)
vb2_buffer_done(&node->next_frm->vb.vb2_buf,
- VB2_BUF_STATE_ERROR);
+ state);
node->cur_frm = NULL;
node->next_frm = NULL;
@@ -1612,7 +1602,13 @@ static int unicam_start_streaming(struct
int ret;
node->streaming = true;
- if (!unicam_all_nodes_streaming(dev)) {
+ if (!(dev->node[IMAGE_PAD].open && dev->node[IMAGE_PAD].streaming &&
+ (!dev->node[METADATA_PAD].open ||
+ dev->node[METADATA_PAD].streaming))) {
+ /*
+ * Metadata pad must be enabled before image pad if it is
+ * wanted.
+ */
unicam_dbg(3, dev, "Not all nodes are streaming yet.");
return 0;
}
@@ -1699,7 +1695,7 @@ err_disable_unicam:
err_pm_put:
unicam_runtime_put(dev);
err_streaming:
- unicam_return_buffers(node);
+ unicam_return_buffers(node, VB2_BUF_STATE_QUEUED);
node->streaming = false;
return ret;
@@ -1736,7 +1732,7 @@ static void unicam_stop_streaming(struct
}
/* Clear all queued buffers for the node */
- unicam_return_buffers(node);
+ unicam_return_buffers(node, VB2_BUF_STATE_ERROR);
}
static int unicam_enum_input(struct file *file, void *priv,
@@ -1754,14 +1750,13 @@ static int unicam_enum_input(struct file
inp->std = 0;
} else if (v4l2_subdev_has_op(dev->sensor, video, s_std)) {
inp->capabilities = V4L2_IN_CAP_STD;
- if (v4l2_subdev_call(dev->sensor, video, g_tvnorms, &inp->std)
- < 0)
+ if (v4l2_subdev_call(dev->sensor, video, g_tvnorms, &inp->std) < 0)
inp->std = V4L2_STD_ALL;
} else {
inp->capabilities = 0;
inp->std = 0;
}
- sprintf(inp->name, "Camera 0");
+ snprintf(inp->name, sizeof(inp->name), "Camera 0");
return 0;
}
@@ -1984,6 +1979,9 @@ static int unicam_s_dv_timings(struct fi
ret = v4l2_subdev_call(dev->sensor, video, g_dv_timings,
&current_timings);
+ if (ret < 0)
+ return ret;
+
if (v4l2_match_dv_timings(timings, &current_timings, 0, false))
return 0;
@@ -2414,12 +2412,6 @@ static int register_node(struct unicam_d
unicam_err(unicam, "Unable to allocate dummy buffer.\n");
return -ENOMEM;
}
-
- if (pad_id == METADATA_PAD) {
- v4l2_disable_ioctl(vdev, VIDIOC_DQEVENT);
- v4l2_disable_ioctl(vdev, VIDIOC_SUBSCRIBE_EVENT);
- v4l2_disable_ioctl(vdev, VIDIOC_UNSUBSCRIBE_EVENT);
- }
if (pad_id == METADATA_PAD ||
!v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_STD);
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