IO buffer wake time used for IO wake calculation is dependent on port clock
on LunarLake and beyond. Take this into account in get_io_buffer_wake_time.
Bspec: 65450
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index d2de2099ad48..efd448431b17 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1160,6 +1160,9 @@ static bool _lnl_compute_alpm_params(struct intel_dp *intel_dp,
* This is not directly mentioned in Bspec. There are 50 us io wake time and 32
* us fast wake time. Clearly preharge pulses are not (improperly) included in
* 32 us fast wake time. 50 us - 32 us = 18 us.
+ *
+ * For DISPLAY_VER >= 20
+ * RBR 15us, HBR1 11us, higher rates 10us
*/
static int get_io_buffer_wake_time(const struct intel_crtc_state *crtc_state)
{
@@ -1167,8 +1170,12 @@ static int get_io_buffer_wake_time(const struct intel_crtc_state *crtc_state)
if (DISPLAY_VER(i915) < 12)
return 18;
- else
+ else if (DISPLAY_VER(i915) < 20 || crtc_state->port_clock > 270000)
return 10;
+ else if (crtc_state->port_clock > 162000)
+ return 11;
+ else
+ return 15;
}
static bool _compute_alpm_params(struct intel_dp *intel_dp,
--
2.34.1
