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media: atomisp: Simplify atomisp_[start|stop]_streaming()

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Now that continuous mode is gone and we only have 1 /dev/video# node,
the videobuf2 core guarantees that atomisp_[start|stop]_streaming() will
only be called one at a time.

So there is no need to check for things like the isp is already streaming
when starting, or other streams still being active while stopping.
Remove checks for these from atomisp_[start|stop]_streaming().

While at it also improve the logging a bit:
1. Remove the dev_err(isp->dev, "atomisp_reset") logged on every
   stream stop (even though everything is fine.
2. Log a message when starting/stopping the sensor stream fails

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Hans de Goede 2023-05-11 16:03:38 +01:00 committed by Mauro Carvalho Chehab
parent 1ae393ea3d
commit 3f3ee94c89
1 changed files with 17 additions and 72 deletions
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89
drivers/staging/media/atomisp/pci/atomisp_ioctl.c
View File

@ -615,12 +615,6 @@ static int atomisp_enum_input(struct file *file, void *fh,
return 0;
}
static unsigned int
atomisp_subdev_streaming_count(struct atomisp_sub_device *asd)
{
return vb2_start_streaming_called(&asd->video_out.vb_queue);
}
unsigned int atomisp_streaming_count(struct atomisp_device *isp)
{
return isp->asd.streaming == ATOMISP_DEVICE_STREAMING_ENABLED;
@ -1162,11 +1156,6 @@ int atomisp_start_streaming(struct vb2_queue *vq, unsigned int count)
/* Input system HW workaround */
atomisp_dma_burst_len_cfg(asd);
if (asd->streaming == ATOMISP_DEVICE_STREAMING_ENABLED) {
atomisp_qbuffers_to_css(asd);
goto start_sensor;
}
css_pipe_id = atomisp_get_css_pipe_id(asd);
/* Invalidate caches. FIXME: should flush only necessary buffers */
@ -1206,7 +1195,6 @@ int atomisp_start_streaming(struct vb2_queue *vq, unsigned int count)
atomisp_qbuffers_to_css(asd);
start_sensor:
if (isp->flash) {
asd->params.num_flash_frames = 0;
asd->params.flash_state = ATOMISP_FLASH_IDLE;
@ -1216,19 +1204,9 @@ int atomisp_start_streaming(struct vb2_queue *vq, unsigned int count)
atomisp_css_irq_enable(isp, IA_CSS_IRQ_INFO_CSS_RECEIVER_SOF,
atomisp_css_valid_sof(isp));
atomisp_csi2_configure(asd);
/*
* set freq to max when streaming count > 1 which indicate
* dual camera would run
*/
if (atomisp_streaming_count(isp) > 1) {
if (atomisp_freq_scaling(isp,
ATOMISP_DFS_MODE_MAX, false) < 0)
dev_dbg(isp->dev, "DFS max mode failed!\n");
} else {
if (atomisp_freq_scaling(isp,
ATOMISP_DFS_MODE_AUTO, false) < 0)
dev_dbg(isp->dev, "DFS auto mode failed!\n");
}
if (atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_AUTO, false) < 0)
dev_dbg(isp->dev, "DFS auto mode failed!\n");
/* Enable the CSI interface on ANN B0/K0 */
if (isp->media_dev.hw_revision >= ((ATOMISP_HW_REVISION_ISP2401 <<
@ -1241,6 +1219,7 @@ int atomisp_start_streaming(struct vb2_queue *vq, unsigned int count)
ret = v4l2_subdev_call(isp->inputs[asd->input_curr].camera,
video, s_stream, 1);
if (ret) {
dev_err(isp->dev, "Starting sensor stream failed: %d\n", ret);
spin_lock_irqsave(&isp->lock, irqflags);
asd->streaming = ATOMISP_DEVICE_STREAMING_DISABLED;
spin_unlock_irqrestore(&isp->lock, irqflags);
@ -1260,8 +1239,6 @@ void atomisp_stop_streaming(struct vb2_queue *vq)
struct atomisp_device *isp = asd->isp;
struct pci_dev *pdev = to_pci_dev(isp->dev);
enum ia_css_pipe_id css_pipe_id;
bool recreate_stream = false;
bool first_streamoff = false;
unsigned long flags;
int ret;
@ -1284,19 +1261,10 @@ void atomisp_stop_streaming(struct vb2_queue *vq)
if (ret == 0)
dev_warn(isp->dev, "Warning timeout waiting for CSS to return buffers\n");
if (asd->streaming == ATOMISP_DEVICE_STREAMING_ENABLED)
first_streamoff = true;
spin_lock_irqsave(&isp->lock, flags);
if (atomisp_subdev_streaming_count(asd) == 1)
asd->streaming = ATOMISP_DEVICE_STREAMING_DISABLED;
else
asd->streaming = ATOMISP_DEVICE_STREAMING_STOPPING;
asd->streaming = ATOMISP_DEVICE_STREAMING_DISABLED;
spin_unlock_irqrestore(&isp->lock, flags);
if (!first_streamoff)
goto stopsensor;
atomisp_clear_css_buffer_counters(asd);
atomisp_css_irq_enable(isp, IA_CSS_IRQ_INFO_CSS_RECEIVER_SOF, false);
@ -1306,21 +1274,17 @@ void atomisp_stop_streaming(struct vb2_queue *vq)
atomisp_flush_video_pipe(pipe, VB2_BUF_STATE_ERROR, true);
atomisp_subdev_cleanup_pending_events(asd);
stopsensor:
ret = v4l2_subdev_call(isp->inputs[asd->input_curr].camera,
video, s_stream, 0);
if (ret)
dev_warn(isp->dev, "Stopping sensor stream failed: %d\n", ret);
if (isp->flash) {
asd->params.num_flash_frames = 0;
asd->params.flash_state = ATOMISP_FLASH_IDLE;
}
/* if other streams are running, isp should not be powered off */
if (atomisp_streaming_count(isp)) {
atomisp_css_flush(isp);
goto out_unlock;
}
/* Disable the CSI interface on ANN B0/K0 */
if (isp->media_dev.hw_revision >= ((ATOMISP_HW_REVISION_ISP2401 <<
ATOMISP_HW_REVISION_SHIFT) | ATOMISP_HW_STEPPING_B0)) {
@ -1330,40 +1294,21 @@ void atomisp_stop_streaming(struct vb2_queue *vq)
if (atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_LOW, false))
dev_warn(isp->dev, "DFS failed.\n");
/*
* ISP work around, need to reset isp
* Is it correct time to reset ISP when first node does streamoff?
*
* It is possible that the other asd stream is in the stage
* that v4l2_setfmt is just get called on it, which will
* create css stream on that stream. But at this point, there
* is no way to destroy the css stream created on that stream.
*
* So force stream destroy here.
*/
if (isp->asd.stream_prepared) {
atomisp_destroy_pipes_stream_force(&isp->asd);
recreate_stream = true;
}
/* disable PUNIT/ISP acknowlede/handshake - SRSE=3 */
/*
* ISP work around, need to reset ISP to allow next stream on to work.
* Streams have already been destroyed by atomisp_css_stop().
* Disable PUNIT/ISP acknowlede/handshake - SRSE=3 and then reset.
*/
pci_write_config_dword(pdev, PCI_I_CONTROL,
isp->saved_regs.i_control | MRFLD_PCI_I_CONTROL_SRSE_RESET_MASK);
dev_err(isp->dev, "atomisp_reset");
atomisp_reset(isp);
if (recreate_stream) {
int ret2;
/* Streams were destroyed by atomisp_css_stop(), recreate them. */
ret = atomisp_create_pipes_stream(&isp->asd);
if (ret)
dev_warn(isp->dev, "Recreating streams failed: %d\n", ret);
ret2 = atomisp_create_pipes_stream(&isp->asd);
if (ret2) {
dev_err(isp->dev, "%s error re-creating streams: %d\n", __func__, ret2);
if (!ret)
ret = ret2;
}
}
out_unlock:
mutex_unlock(&isp->mutex);
}