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staging: media: tegra-video: add H/V flip controls 

Tegra20 can do horizontal and vertical image flip, but Tegra210 cannot
(either the hardware, or this driver).

In preparation to adding Tegra20 support, add a flag in struct tegra_vi_soc
so the generic vi.c code knows whether the flip controls should be added or
not.

Also provide a generic implementation that simply sets two flags in the
channel struct. The Tegra20 implementation will enable flipping at stream
start based on those flags.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Luca Ceresoli 2023-04-18 10:00:53 +02:00 committed by Hans Verkuil
parent b4e2572267
commit eeb036ab9c
2 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/staging/media/tegra-video/vi.c
View File

@ -30,7 +30,7 @@
#include "vi.h"
#include "video.h"
#define MAX_CID_CONTROLS 1
#define MAX_CID_CONTROLS 3
/**
* struct tegra_vi_graph_entity - Entity in the video graph
@ -912,6 +912,12 @@ static int vi_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_TEGRA_SYNCPT_TIMEOUT_RETRY:
chan->syncpt_timeout_retry = ctrl->val;
break;
case V4L2_CID_HFLIP:
chan->hflip = ctrl->val;
break;
case V4L2_CID_VFLIP:
chan->vflip = ctrl->val;
break;
default:
return -EINVAL;
}
@ -983,6 +989,12 @@ static int tegra_channel_setup_ctrl_handler(struct tegra_vi_channel *chan)
v4l2_ctrl_handler_free(&chan->ctrl_handler);
return ret;
}
if (chan->vi->soc->has_h_v_flip) {
v4l2_ctrl_new_std(&chan->ctrl_handler, &vi_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&chan->ctrl_handler, &vi_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
}
#endif
/* setup the controls */

8
drivers/staging/media/tegra-video/vi.h
View File

@ -74,6 +74,7 @@ struct tegra_vi_ops {
* @hw_revision: VI hw_revision
* @vi_max_channels: supported max streaming channels
* @vi_max_clk_hz: VI clock max frequency
* @has_h_v_flip: the chip can do H and V flip, and the driver implements it
*/
struct tegra_vi_soc {
const struct tegra_video_format *video_formats;
@ -83,6 +84,7 @@ struct tegra_vi_soc {
u32 hw_revision;
unsigned int vi_max_channels;
unsigned int vi_max_clk_hz;
bool has_h_v_flip:1;
};
/**
@ -172,6 +174,9 @@ struct tegra_vi {
* @tpg_fmts_bitmap: a bitmap for supported TPG formats
* @pg_mode: test pattern generator mode (disabled/direct/patch)
* @notifier: V4L2 asynchronous subdevs notifier
*
* @hflip: Horizontal flip is enabled
* @vflip: Vertical flip is enabled
*/
struct tegra_vi_channel {
struct list_head list;
@ -222,6 +227,9 @@ struct tegra_vi_channel {
enum tegra_vi_pg_mode pg_mode;
struct v4l2_async_notifier notifier;
bool hflip:1;
bool vflip:1;
};
/**