Introduce helper functions to compute timings for different mode of operation of VRR timing generator.
Signed-off-by: Ankit Nautiyal <[email protected]> --- drivers/gpu/drm/i915/display/intel_vrr.c | 115 +++++++++++++++-------- 1 file changed, 75 insertions(+), 40 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c index b386e62d1664..b7e3bb75c7a7 100644 --- a/drivers/gpu/drm/i915/display/intel_vrr.c +++ b/drivers/gpu/drm/i915/display/intel_vrr.c @@ -161,6 +161,73 @@ cmrr_get_vtotal(struct intel_crtc_state *crtc_state, bool video_mode_required) return vtotal; } +static +void intel_vrr_compute_cmrr_timings(struct intel_crtc_state *crtc_state) +{ + crtc_state->vrr.enable = true; + crtc_state->cmrr.enable = true; + /* + * TODO: Compute precise target refresh rate to determine + * if video_mode_required should be true. Currently set to + * false due to uncertainty about the precise target + * refresh Rate. + */ + crtc_state->vrr.vmax = cmrr_get_vtotal(crtc_state, false); + crtc_state->vrr.vmin = crtc_state->vrr.vmax; + crtc_state->vrr.flipline = crtc_state->vrr.vmin; + crtc_state->mode_flags |= I915_MODE_FLAG_VRR; +} + +static +int intel_vrr_compute_vmin(struct intel_connector *connector, + struct drm_display_mode *adjusted_mode) +{ + int vmin; + const struct drm_display_info *info = &connector->base.display_info; + + vmin = DIV_ROUND_UP(adjusted_mode->crtc_clock * 1000, + adjusted_mode->crtc_htotal * info->monitor_range.max_vfreq); + vmin = max_t(int, vmin, adjusted_mode->crtc_vtotal); + + return vmin; +} + +static +int intel_vrr_compute_vmax(struct intel_connector *connector, + struct drm_display_mode *adjusted_mode) +{ + int vmax; + const struct drm_display_info *info = &connector->base.display_info; + + vmax = adjusted_mode->crtc_clock * 1000 / + (adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq); + + vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal); + + return vmax; +} + +static +void intel_vrr_prepare_vrr_timings(struct intel_crtc_state *crtc_state, int vmin, int vmax) +{ + /* + * flipline determines the min vblank length the hardware will + * generate, and flipline>=vmin+1, hence we reduce vmin by one + * to make sure we can get the actual min vblank length. + */ + crtc_state->vrr.vmin = vmin - 1; + crtc_state->vrr.vmax = vmax; + crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1; +} + +static +void intel_vrr_compute_vrr_timings(struct intel_crtc_state *crtc_state, int vmin, int vmax) +{ + intel_vrr_prepare_vrr_timings(crtc_state, vmin, vmax); + crtc_state->vrr.enable = true; + crtc_state->mode_flags |= I915_MODE_FLAG_VRR; +} + void intel_vrr_compute_config(struct intel_crtc_state *crtc_state, struct drm_connector_state *conn_state) @@ -171,7 +238,6 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state, struct intel_dp *intel_dp = intel_attached_dp(connector); bool is_edp = intel_dp_is_edp(intel_dp); struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - const struct drm_display_info *info = &connector->base.display_info; int vmin, vmax; /* @@ -192,49 +258,18 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state, if (HAS_LRR(display)) crtc_state->update_lrr = true; - vmin = DIV_ROUND_UP(adjusted_mode->crtc_clock * 1000, - adjusted_mode->crtc_htotal * info->monitor_range.max_vfreq); - vmax = adjusted_mode->crtc_clock * 1000 / - (adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq); - - vmin = max_t(int, vmin, adjusted_mode->crtc_vtotal); - vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal); + vmin = intel_vrr_compute_vmin(connector, adjusted_mode); + vmax = intel_vrr_compute_vmax(connector, adjusted_mode); if (vmin >= vmax) return; - /* - * flipline determines the min vblank length the hardware will - * generate, and flipline>=vmin+1, hence we reduce vmin by one - * to make sure we can get the actual min vblank length. - */ - crtc_state->vrr.vmin = vmin - 1; - crtc_state->vrr.vmax = vmax; - - crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1; - - /* - * When panel is VRR capable and userspace has - * not enabled adaptive sync mode then Fixed Average - * Vtotal mode should be enabled. - */ - if (crtc_state->uapi.vrr_enabled) { - crtc_state->vrr.enable = true; - crtc_state->mode_flags |= I915_MODE_FLAG_VRR; - } else if (is_cmrr_frac_required(crtc_state) && is_edp) { - crtc_state->vrr.enable = true; - crtc_state->cmrr.enable = true; - /* - * TODO: Compute precise target refresh rate to determine - * if video_mode_required should be true. Currently set to - * false due to uncertainty about the precise target - * refresh Rate. - */ - crtc_state->vrr.vmax = cmrr_get_vtotal(crtc_state, false); - crtc_state->vrr.vmin = crtc_state->vrr.vmax; - crtc_state->vrr.flipline = crtc_state->vrr.vmin; - crtc_state->mode_flags |= I915_MODE_FLAG_VRR; - } + if (crtc_state->uapi.vrr_enabled) + intel_vrr_compute_vrr_timings(crtc_state, vmin, vmax); + else if (is_cmrr_frac_required(crtc_state) && is_edp) + intel_vrr_compute_cmrr_timings(crtc_state); + else + intel_vrr_prepare_vrr_timings(crtc_state, vmin, vmax); if (intel_dp->as_sdp_supported && crtc_state->vrr.enable) { crtc_state->vrr.vsync_start = -- 2.45.2
