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authorThomas Zimmermann <tzimmermann@suse.de>2020-01-23 16:59:24 +0300
committerThomas Zimmermann <tzimmermann@suse.de>2020-02-13 15:08:13 +0300
commit7fe3f0d15aac6c98a97e6d7086f5a6b7bc4ccae4 (patch)
treeff005fcab13165c3859c8c4cdce19b181f666e26 /include/drm/drm_vblank.h
parentf1e2b6371c12aec5e772e5fdedaa4455c20a787f (diff)
downloadlinux-7fe3f0d15aac6c98a97e6d7086f5a6b7bc4ccae4.tar.xz
drm: Add get_vblank_timestamp() to struct drm_crtc_funcs
The callback get_vblank_timestamp() is currently located in struct drm_driver, but really belongs into struct drm_crtc_funcs. Add an equivalent there. Driver will be converted in separate patches. The default implementation is drm_calc_vbltimestamp_from_scanoutpos(). The patch adds drm_crtc_vblank_helper_get_vblank_timestamp(), which is an implementation for the CRTC callback. v4: * more readable code for setting high_prec (Ville, Jani) v3: * use refactored timestamp calculation to minimize duplicated code * do more checks for crtc != NULL to support legacy drivers v2: * rename helper to drm_crtc_vblank_helper_get_vblank_timestamp() * replace drm_calc_vbltimestamp_from_scanoutpos() with drm_crtc_vblank_helper_get_vblank_timestamp() in docs Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200123135943.24140-4-tzimmermann@suse.de
Diffstat (limited to 'include/drm/drm_vblank.h')
-rw-r--r--include/drm/drm_vblank.h16
1 files changed, 12 insertions, 4 deletions
diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h
index fd28741e64ed..91f8e35d588d 100644
--- a/include/drm/drm_vblank.h
+++ b/include/drm/drm_vblank.h
@@ -174,13 +174,13 @@ struct drm_vblank_crtc {
unsigned int pipe;
/**
* @framedur_ns: Frame/Field duration in ns, used by
- * drm_calc_vbltimestamp_from_scanoutpos() and computed by
+ * drm_crtc_vblank_helper_get_vblank_timestamp() and computed by
* drm_calc_timestamping_constants().
*/
int framedur_ns;
/**
* @linedur_ns: Line duration in ns, used by
- * drm_calc_vbltimestamp_from_scanoutpos() and computed by
+ * drm_crtc_vblank_helper_get_vblank_timestamp() and computed by
* drm_calc_timestamping_constants().
*/
int linedur_ns;
@@ -190,8 +190,8 @@ struct drm_vblank_crtc {
*
* Cache of the current hardware display mode. Only valid when @enabled
* is set. This is used by helpers like
- * drm_calc_vbltimestamp_from_scanoutpos(). We can't just access the
- * hardware mode by e.g. looking at &drm_crtc_state.adjusted_mode,
+ * drm_crtc_vblank_helper_get_vblank_timestamp(). We can't just access
+ * the hardware mode by e.g. looking at &drm_crtc_state.adjusted_mode,
* because that one is really hard to get from interrupt context.
*/
struct drm_display_mode hwmode;
@@ -240,6 +240,10 @@ wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc);
void drm_crtc_set_max_vblank_count(struct drm_crtc *crtc,
u32 max_vblank_count);
+/*
+ * Helpers for struct drm_crtc_funcs
+ */
+
typedef bool (*drm_vblank_get_scanout_position_func)(struct drm_crtc *crtc,
bool in_vblank_irq,
int *vpos, int *hpos,
@@ -263,5 +267,9 @@ drm_crtc_vblank_helper_get_vblank_timestamp_internal(struct drm_crtc *crtc,
bool in_vblank_irq,
drm_vblank_get_scanout_position_func get_scanout_position,
drm_vblank_get_scanout_position_legacy_func get_scanout_position_legacy);
+bool drm_crtc_vblank_helper_get_vblank_timestamp(struct drm_crtc *crtc,
+ int *max_error,
+ ktime_t *vblank_time,
+ bool in_vblank_irq);
#endif