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| author | Mahesh Kumar <mahesh1.kumar@intel.com> | 2018-07-13 15:59:33 +0200 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2018-08-13 14:00:20 +0200 |
| commit | d5cc15a0c66e207d5a7f1b92f32899cc8f380468 (patch) | |
| tree | 1263869c956b0df19e6c9e75d2cc3da4a365aac1 /drivers/gpu/drm/drm_debugfs_crc.c | |
| parent | drm/virtio: Replace drm_dev_unref with drm_dev_put (diff) | |
| download | linux-d5cc15a0c66e207d5a7f1b92f32899cc8f380468.tar.xz linux-d5cc15a0c66e207d5a7f1b92f32899cc8f380468.zip | |
drm: crc: Introduce verify_crc_source callback
This patch adds a new callback function "verify_crc_source" which will
be used during setting the crc source in control node. This will help
in avoiding setting of wrong string for source.
Changes since V1:
- do not yet verify_crc_source during open.
Changes since V1:
- improve callback description
Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: dri-devel@lists.freedesktop.org
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180713135942.25061-2-mahesh1.kumar@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_debugfs_crc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_debugfs_crc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c index 99961192bf03..72bfd8af3f7a 100644 --- a/drivers/gpu/drm/drm_debugfs_crc.c +++ b/drivers/gpu/drm/drm_debugfs_crc.c @@ -87,6 +87,8 @@ static ssize_t crc_control_write(struct file *file, const char __user *ubuf, struct drm_crtc *crtc = m->private; struct drm_crtc_crc *crc = &crtc->crc; char *source; + size_t values_cnt; + int ret; if (len == 0) return 0; @@ -104,6 +106,12 @@ static ssize_t crc_control_write(struct file *file, const char __user *ubuf, if (source[len] == '\n') source[len] = '\0'; + if (crtc->funcs->verify_crc_source) { + ret = crtc->funcs->verify_crc_source(crtc, source, &values_cnt); + if (ret) + return ret; + } + spin_lock_irq(&crc->lock); if (crc->opened) { |