b03b1237c4
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>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-v4l2.h>
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typedef int16_t strength_t;
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struct v4l2_heatmap {
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struct device *parent_dev;
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/* Can be NULL. Used to get the input device name */
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struct input_dev *input_dev;
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struct v4l2_device device;
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struct v4l2_pix_format format;
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struct video_device vdev;
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struct vb2_queue queue;
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struct mutex lock;
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unsigned int input_index;
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size_t width;
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size_t height;
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/* The 'frame' storage is managed by the heatmap module.
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* The data inside frame is written inside read_frame(..)
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* and is read inside heatmap_read(..).
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*/
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strength_t *frame;
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struct v4l2_fract timeperframe;
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/* Used to protect access to the buffer queue */
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spinlock_t heatmap_lock;
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/* guarded by heatmap_lock */
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struct list_head heatmap_buffer_list;
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/*
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* Function read_frame must be provided by the driver.
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* This function should write the video frame into the
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* 'frame' field of struct v4l2_heatmap.
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* It should return 'true' on successful heatmap read
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* and 'false' on failure.
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*/
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bool (*read_frame)(struct v4l2_heatmap *v4l2);
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};
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int heatmap_probe(struct v4l2_heatmap *v4l2);
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void heatmap_remove(struct v4l2_heatmap *v4l2);
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/**
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* Read the heatmap and populate an available buffer with data.
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* The timestamp provided to this function will be used as the frame time.
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* Designed to be called from interrupt context.
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* This function should be called from the driver. Internally, it will call
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* read_frame(..) provided by the driver to read the actual data.
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*/
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void heatmap_read(struct v4l2_heatmap *v4l2, uint64_t timestamp); |