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Currently crtc_vblank_start is assumed to be the vblank_start for the fixed refresh rate case. That value can be different from the variable refresh rate case whenever always_use_vrr_tg()==false. On icl/tgl it's always different due to the extra vblank delay, and also on adl+ it could be different if we were to use an optimized guardband. So places where crtc_vblank_start is used to compute vblank length needs change so as to account for cases where vrr is enabled. Specifically with vrr.enable the effective vblank length is actually guardband. Add a helper to get the correct vblank length for both vrr and fixed refresh rate cases. Use this helper where vblank_start is used to compute the vblank length. Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://lore.kernel.org/r/20251016055415.2101347-5-ankit.k.nautiyal@intel.com
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2022-2023 Intel Corporation
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*/
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#ifndef __INTEL_VBLANK_H__
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#define __INTEL_VBLANK_H__
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#include <linux/ktime.h>
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#include <linux/types.h>
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struct drm_crtc;
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struct drm_display_mode;
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struct intel_atomic_state;
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struct intel_crtc;
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struct intel_crtc_state;
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struct intel_vblank_evade_ctx {
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struct intel_crtc *crtc;
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int min, max, vblank_start;
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bool need_vlv_dsi_wa;
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};
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int intel_mode_vdisplay(const struct drm_display_mode *mode);
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int intel_mode_vblank_start(const struct drm_display_mode *mode);
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int intel_mode_vblank_end(const struct drm_display_mode *mode);
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int intel_mode_vtotal(const struct drm_display_mode *mode);
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int intel_mode_vblank_delay(const struct drm_display_mode *mode);
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void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
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const struct intel_crtc_state *new_crtc_state,
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struct intel_vblank_evade_ctx *evade);
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/* must be called with vblank interrupt already enabled! */
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int intel_vblank_evade(struct intel_vblank_evade_ctx *evade);
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u32 i915_get_vblank_counter(struct drm_crtc *crtc);
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u32 g4x_get_vblank_counter(struct drm_crtc *crtc);
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bool intel_crtc_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error,
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ktime_t *vblank_time, bool in_vblank_irq);
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int intel_get_crtc_scanline(struct intel_crtc *crtc);
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void intel_wait_for_pipe_scanline_stopped(struct intel_crtc *crtc);
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void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc);
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void intel_crtc_update_active_timings(const struct intel_crtc_state *crtc_state,
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bool vrr_enable);
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int intel_crtc_scanline_offset(const struct intel_crtc_state *crtc_state);
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const struct intel_crtc_state *
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intel_pre_commit_crtc_state(struct intel_atomic_state *state,
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struct intel_crtc *crtc);
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int intel_crtc_vblank_length(const struct intel_crtc_state *crtc_state);
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#endif /* __INTEL_VBLANK_H__ */
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