drm/i915/vrr: Readout framestart_delay earlier

In order to pretend that ICL/TGL VRR hardware has a similar guardband
as on ADL+ we'll need access to framestart_delay already during
intel_vrr_get_config(). Hoist the framestart_delay to an earlier point
to make that possible.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250917203446.14374-3-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index a743d13395506da3ca98974424ab13f2ffa13325..c7d85fd38890593fff80c9fa6bcc8912ed1301da 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3891,6 +3891,15 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
        intel_joiner_get_config(pipe_config);
        intel_dsc_get_config(pipe_config);
 
+       if (!transcoder_is_dsi(pipe_config->cpu_transcoder)) {
+               tmp = intel_de_read(display, CHICKEN_TRANS(display, pipe_config->cpu_transcoder));
+
+               pipe_config->framestart_delay = REG_FIELD_GET(HSW_FRAME_START_DELAY_MASK, tmp) + 1;
+       } else {
+               /* no idea if this is correct */
+               pipe_config->framestart_delay = 1;
+       }
+
        if (!transcoder_is_dsi(pipe_config->cpu_transcoder) ||
            DISPLAY_VER(display) >= 11)
                intel_get_transcoder_timings(crtc, pipe_config);
@@ -3942,15 +3951,6 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
                pipe_config->pixel_multiplier = 1;
        }
 
-       if (!transcoder_is_dsi(pipe_config->cpu_transcoder)) {
-               tmp = intel_de_read(display, CHICKEN_TRANS(display, pipe_config->cpu_transcoder));
-
-               pipe_config->framestart_delay = REG_FIELD_GET(HSW_FRAME_START_DELAY_MASK, tmp) + 1;
-       } else {
-               /* no idea if this is correct */
-               pipe_config->framestart_delay = 1;
-       }
-
 out:
        intel_display_power_put_all_in_set(display, &crtc->hw_readout_power_domains);