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drm/mgag200: Implement struct drm_crtc_funcs.get_vblank_timestamp

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Implement struct drm_crtc_funcs.get_vblank_timestamp with the DRM
helper drm_crtc_vblank_helper_get_vblank_timestamp() with its helper
get_scanout_position. Read the scanout position from the MGAREG_VCOUNT
register.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240718104551.575912-8-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2024-07-18 12:44:17 +02:00
parent 89c6ea2006
commit d5070c9b29
2 changed files with 33 additions and 2 deletions
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10
drivers/gpu/drm/mgag200/mgag200_drv.h
View File

@ -400,13 +400,18 @@ int mgag200_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_st
void mgag200_crtc_helper_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
void mgag200_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
void mgag200_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
bool mgag200_crtc_helper_get_scanout_position(struct drm_crtc *crtc, bool in_vblank_irq,
int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode);
#define MGAG200_CRTC_HELPER_FUNCS \
.mode_valid = mgag200_crtc_helper_mode_valid, \
.atomic_check = mgag200_crtc_helper_atomic_check, \
.atomic_flush = mgag200_crtc_helper_atomic_flush, \
.atomic_enable = mgag200_crtc_helper_atomic_enable, \
.atomic_disable = mgag200_crtc_helper_atomic_disable
.atomic_disable = mgag200_crtc_helper_atomic_disable, \
.get_scanout_position = mgag200_crtc_helper_get_scanout_position
void mgag200_crtc_reset(struct drm_crtc *crtc);
struct drm_crtc_state *mgag200_crtc_atomic_duplicate_state(struct drm_crtc *crtc);
@ -422,7 +427,8 @@ void mgag200_crtc_disable_vblank(struct drm_crtc *crtc);
.atomic_duplicate_state = mgag200_crtc_atomic_duplicate_state, \
.atomic_destroy_state = mgag200_crtc_atomic_destroy_state, \
.enable_vblank = mgag200_crtc_enable_vblank, \
.disable_vblank = mgag200_crtc_disable_vblank
.disable_vblank = mgag200_crtc_disable_vblank, \
.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp
void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode,
bool set_vidrst);

25
drivers/gpu/drm/mgag200/mgag200_mode.c
View File

@ -714,6 +714,31 @@ void mgag200_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic
mgag200_disable_display(mdev);
}
bool mgag200_crtc_helper_get_scanout_position(struct drm_crtc *crtc, bool in_vblank_irq,
int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode)
{
struct mga_device *mdev = to_mga_device(crtc->dev);
u32 vcount;
if (stime)
*stime = ktime_get();
if (vpos) {
vcount = RREG32(MGAREG_VCOUNT);
*vpos = vcount & GENMASK(11, 0);
}
if (hpos)
*hpos = mode->htotal >> 1; // near middle of scanline on average
if (etime)
*etime = ktime_get();
return true;
}
void mgag200_crtc_reset(struct drm_crtc *crtc)
{
struct mgag200_crtc_state *mgag200_crtc_state;