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drm/i915: Extract intel_mode_vblank_start()

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We want to calculate the vblank_start for vblank evasion
differently for vrr. To make that nicer lets first extract
the current non-vrr case to a helper.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-4-manasi.d.navare@intel.com
This commit is contained in:
Ville Syrjälä 2021-01-22 15:26:33 -08:00 committed by Manasi Navare
parent fa429c0410
commit 615e29eeb4
1 changed files with 11 additions and 3 deletions
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14
drivers/gpu/drm/i915/display/intel_sprite.c
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@ -62,6 +62,16 @@ int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
1000 * adjusted_mode->crtc_htotal);
}
static int intel_mode_vblank_start(const struct drm_display_mode *mode)
{
int vblank_start = mode->crtc_vblank_start;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
vblank_start = DIV_ROUND_UP(vblank_start, 2);
return vblank_start;
}
/**
* intel_pipe_update_start() - start update of a set of display registers
* @new_crtc_state: the new crtc state
@ -90,9 +100,7 @@ void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state)
if (new_crtc_state->uapi.async_flip)
return;
vblank_start = adjusted_mode->crtc_vblank_start;
if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
vblank_start = DIV_ROUND_UP(vblank_start, 2);
vblank_start = intel_mode_vblank_start(adjusted_mode);
/* FIXME needs to be calibrated sensibly */
min = vblank_start - intel_usecs_to_scanlines(adjusted_mode,