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drm/i915: Introduce intel_mode_vdisplay()

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The DSB code will need to know the hardware's idea of vertical
active, as that is also what defines the start of undelayed
vblank. Introduce a helper that gives us that information,
in line with the other intel_mode_v*() functions.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611133344.30673-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä
2024-06-11 16:33:37 +03:00
parent 367cf0d8a6
commit 294ffd2bfa
2 changed files with 11 additions and 0 deletions
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10
drivers/gpu/drm/i915/display/intel_vblank.c
View File

@@ -557,6 +557,16 @@ void intel_crtc_update_active_timings(const struct intel_crtc_state *crtc_state,
spin_unlock_irqrestore(&i915->drm.vblank_time_lock, irqflags);
}
int intel_mode_vdisplay(const struct drm_display_mode *mode)
{
int vdisplay = mode->crtc_vdisplay;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
vdisplay = DIV_ROUND_UP(vdisplay, 2);
return vdisplay;
}
int intel_mode_vblank_start(const struct drm_display_mode *mode)
{
int vblank_start = mode->crtc_vblank_start;

1
drivers/gpu/drm/i915/display/intel_vblank.h
View File

@@ -20,6 +20,7 @@ struct intel_vblank_evade_ctx {
bool need_vlv_dsi_wa;
};
int intel_mode_vdisplay(const struct drm_display_mode *mode);
int intel_mode_vblank_start(const struct drm_display_mode *mode);
int intel_mode_vblank_end(const struct drm_display_mode *mode);
int intel_mode_vtotal(const struct drm_display_mode *mode);