mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
9edbf1fa60
Adds files and directories to debugfs for controlling and reading frame
CRCs, per CRTC:
dri/0/crtc-0/crc
dri/0/crtc-0/crc/control
dri/0/crtc-0/crc/data
Drivers can implement the set_crc_source callback() in drm_crtc_funcs to
start and stop generating frame CRCs and can add entries to the output
by calling drm_crtc_add_crc_entry.
v2:
- Lots of good fixes suggested by Thierry.
- Added documentation.
- Changed the debugfs layout.
- Moved to allocate the entries circular queue once when frame
generation gets enabled for the first time.
v3:
- Use the control file just to select the source, and start and stop
capture when the data file is opened and closed, respectively.
- Make variable the number of CRC values per entry, per source.
- Allocate entries queue each time we start capturing as now there
isn't a fixed number of CRC values per entry.
- Store the frame counter in the data file as a 8-digit hex number.
- For sources that cannot provide useful frame numbers, place
XXXXXXXX in the frame field.
v4:
- Build only if CONFIG_DEBUG_FS is enabled.
- Use memdup_user_nul.
- Consolidate calculation of the size of an entry in a helper.
- Add 0x prefix to hex numbers in the data file.
- Remove unnecessary snprintf and strlen usage in read callback.
v5:
- Made the crcs array in drm_crtc_crc_entry fixed-size
- Lots of other smaller improvements suggested by Emil Velikov
v7:
- Move definition of drm_debugfs_crtc_crc_add to drm_internal.h
v8:
- Call debugfs_remove_recursive when we fail to create the minor
device
v9:
- Register the debugfs directory for a crtc from
drm_crtc_register_all()
v10:
- Don't let debugfs failures interrupt CRTC registration (Emil
Velikov)
v11:
- Remove extra brace that broke compilation. Sorry!
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1475767268-14379-3-git-send-email-tomeu.vizoso@collabora.com
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/*
|
|
* Copyright © 2016 Collabora Ltd.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#ifndef __DRM_DEBUGFS_CRC_H__
|
|
#define __DRM_DEBUGFS_CRC_H__
|
|
|
|
#define DRM_MAX_CRC_NR 10
|
|
|
|
/**
|
|
* struct drm_crtc_crc_entry - entry describing a frame's content
|
|
* @has_frame_counter: whether the source was able to provide a frame number
|
|
* @frame: number of the frame this CRC is about, if @has_frame_counter is true
|
|
* @crc: array of values that characterize the frame
|
|
*/
|
|
struct drm_crtc_crc_entry {
|
|
bool has_frame_counter;
|
|
uint32_t frame;
|
|
uint32_t crcs[DRM_MAX_CRC_NR];
|
|
};
|
|
|
|
#define DRM_CRC_ENTRIES_NR 128
|
|
|
|
/**
|
|
* struct drm_crtc_crc - data supporting CRC capture on a given CRTC
|
|
* @lock: protects the fields in this struct
|
|
* @source: name of the currently configured source of CRCs
|
|
* @opened: whether userspace has opened the data file for reading
|
|
* @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR
|
|
* @head: head of circular queue
|
|
* @tail: tail of circular queue
|
|
* @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR
|
|
* @wq: workqueue used to synchronize reading and writing
|
|
*/
|
|
struct drm_crtc_crc {
|
|
spinlock_t lock;
|
|
const char *source;
|
|
bool opened;
|
|
struct drm_crtc_crc_entry *entries;
|
|
int head, tail;
|
|
size_t values_cnt;
|
|
wait_queue_head_t wq;
|
|
};
|
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
|
|
uint32_t frame, uint32_t *crcs);
|
|
#else
|
|
static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
|
|
uint32_t frame, uint32_t *crcs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif /* defined(CONFIG_DEBUG_FS) */
|
|
|
|
#endif /* __DRM_DEBUGFS_CRC_H__ */
|