ec5b56897b
drivers/input/touchscreen/heatmap.c:79:24: error: variable length array used [-Werror,-Wvla] strength_t temp_buffer[total_bytes]; Bug: 139783401 Test: Use v4l-heatmap-viewer.apk(provided in bug) to check touch heatmap is workable. Change-Id: I640a711a4065f2909e4aa0738eae2b1e36c817d5 Signed-off-by: davidycchen <davidycchen@google.com> (cherry picked from commit 752bb006b9865a0268b5dd3c677d03c0873f8e84)
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include <media/videobuf2-v4l2.h>
|
|
|
|
typedef int16_t strength_t;
|
|
|
|
struct v4l2_heatmap {
|
|
struct device *parent_dev;
|
|
/* Can be NULL. Used to get the input device name */
|
|
struct input_dev *input_dev;
|
|
struct v4l2_device device;
|
|
struct v4l2_pix_format format;
|
|
struct video_device vdev;
|
|
struct vb2_queue queue;
|
|
struct mutex lock;
|
|
unsigned int input_index;
|
|
|
|
size_t width;
|
|
size_t height;
|
|
|
|
/* The 'frame' storage is managed by the heatmap module.
|
|
* The data inside frame is written inside read_frame(..)
|
|
* and is read inside heatmap_read(..).
|
|
*/
|
|
strength_t *frame;
|
|
|
|
struct v4l2_fract timeperframe;
|
|
|
|
/* Used to protect access to the buffer queue */
|
|
spinlock_t heatmap_lock;
|
|
/* guarded by heatmap_lock */
|
|
struct list_head heatmap_buffer_list;
|
|
|
|
/*
|
|
* Function read_frame must be provided by the driver.
|
|
* This function should write the video frame into the
|
|
* 'frame' field of struct v4l2_heatmap.
|
|
* It should return 'true' on successful heatmap read
|
|
* and 'false' on failure.
|
|
*/
|
|
bool (*read_frame)(struct v4l2_heatmap *v4l2);
|
|
};
|
|
|
|
int heatmap_probe(struct v4l2_heatmap *v4l2);
|
|
void heatmap_remove(struct v4l2_heatmap *v4l2);
|
|
/**
|
|
* Read the heatmap and populate an available buffer with data.
|
|
* The timestamp provided to this function will be used as the frame time.
|
|
* Designed to be called from interrupt context.
|
|
* This function should be called from the driver. Internally, it will call
|
|
* read_frame(..) provided by the driver to read the actual data.
|
|
*/
|
|
void heatmap_read(struct v4l2_heatmap *v4l2, uint64_t timestamp); |