From 06d6fda506cf2745ec9e34d32cff6222917fbb71 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 22 Jan 2021 15:26:34 -0800 Subject: [PATCH] drm/i915: Extract intel_crtc_scanlines_since_frame_timestamp() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Extract intel_crtc_scanlines_since_frame_timestamp() from __intel_get_crtc_scanline_from_timestamp(). We'll reuse this for VRR vblank timestamps. Signed-off-by: Ville Syrjälä Signed-off-by: Manasi Navare Reviewed-by: Manasi Navare Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-5-manasi.d.navare@intel.com --- drivers/gpu/drm/i915/i915_irq.c | 38 +++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 33019cf0e630..b1998b272fd1 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -718,25 +718,15 @@ u32 g4x_get_vblank_counter(struct drm_crtc *crtc) return intel_uncore_read(&dev_priv->uncore, PIPE_FRMCOUNT_G4X(pipe)); } -/* - * On certain encoders on certain platforms, pipe - * scanline register will not work to get the scanline, - * since the timings are driven from the PORT or issues - * with scanline register updates. - * This function will use Framestamp and current - * timestamp registers to calculate the scanline. - */ -static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc) +static u32 intel_crtc_scanlines_since_frame_timestamp(struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct drm_vblank_crtc *vblank = &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; const struct drm_display_mode *mode = &vblank->hwmode; - u32 vblank_start = mode->crtc_vblank_start; - u32 vtotal = mode->crtc_vtotal; u32 htotal = mode->crtc_htotal; u32 clock = mode->crtc_clock; - u32 scanline, scan_prev_time, scan_curr_time, scan_post_time; + u32 scan_prev_time, scan_curr_time, scan_post_time; /* * To avoid the race condition where we might cross into the @@ -763,8 +753,28 @@ static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc) PIPE_FRMTMSTMP(crtc->pipe)); } while (scan_post_time != scan_prev_time); - scanline = div_u64(mul_u32_u32(scan_curr_time - scan_prev_time, - clock), 1000 * htotal); + return div_u64(mul_u32_u32(scan_curr_time - scan_prev_time, + clock), 1000 * htotal); +} + +/* + * On certain encoders on certain platforms, pipe + * scanline register will not work to get the scanline, + * since the timings are driven from the PORT or issues + * with scanline register updates. + * This function will use Framestamp and current + * timestamp registers to calculate the scanline. + */ +static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc) +{ + struct drm_vblank_crtc *vblank = + &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; + const struct drm_display_mode *mode = &vblank->hwmode; + u32 vblank_start = mode->crtc_vblank_start; + u32 vtotal = mode->crtc_vtotal; + u32 scanline; + + scanline = intel_crtc_scanlines_since_frame_timestamp(crtc); scanline = min(scanline, vtotal - 1); scanline = (scanline + vblank_start) % vtotal; -- 2.20.1