> -----Original Message-----
> From: Intel-gfx <[email protected]> On Behalf Of Ankit
> Nautiyal
> Sent: Monday, November 11, 2024 2:42 PM
> To: [email protected]
> Cc: [email protected]; [email protected];
> [email protected]; Golani, Mitulkumar Ajitkumar
> <[email protected]>
> Subject: [PATCH 01/23] drm/i915/vrr: Refactor VRR Timing Computation
>
> Introduce helper functions to compute timins gfor different mode of operation
> of
> VRR timing generator.
>
Typo : timing
> 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 19a5d0076bb8..defe346b0261 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
