Increase the latency programmed into PKG_C_LATENCY latency to be a multiple of line time which is written into WM_LINETIME.
--v2 -Fix commit subject line [Sai Teja] -Use individual DISPLAY_VER checks instead of range [Sai Teja] -Initialize max_linetime [Sai Teja] --v3 -take into account the scenario when adjusted_latency is 0 [Vinod] --v4 -rename adjusted_latency to latency [Mitul] -fix the condition in which dpkgc is disabled [Vinod] WA: 22020299601 Signed-off-by: Suraj Kandpal <[email protected]> --- drivers/gpu/drm/i915/display/intel_wm.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_wm.c b/drivers/gpu/drm/i915/display/intel_wm.c index ffc7dde86629..47c82aa2adf9 100644 --- a/drivers/gpu/drm/i915/display/intel_wm.c +++ b/drivers/gpu/drm/i915/display/intel_wm.c @@ -157,8 +157,9 @@ intel_wm_compute_dpkgc_latency(struct intel_atomic_state *state, struct intel_display *display = to_intel_display(state); struct intel_crtc *crtc; struct intel_crtc_state *new_crtc_state; - u32 max_latency = LNL_PKG_C_LATENCY_MASK; + u32 latency = LNL_PKG_C_LATENCY_MASK; u32 added_waketime = 0; + u32 max_linetime = 0; int i; bool fixed_refresh_rate = false; @@ -170,17 +171,27 @@ intel_wm_compute_dpkgc_latency(struct intel_atomic_state *state, new_crtc_state->vrr.vmin == new_crtc_state->vrr.flipline) || !new_crtc_state->vrr.enable) fixed_refresh_rate = true; + + max_linetime = max(new_crtc_state->linetime, max_linetime); } if (fixed_refresh_rate) { - max_latency = skl_watermark_max_latency(i915, 1); - if (max_latency == 0) - max_latency = LNL_PKG_C_LATENCY_MASK; + latency = skl_watermark_max_latency(i915, 1); + + /* Wa_22020299601 */ + if (latency) { + if (DISPLAY_VER(display) == 20 || DISPLAY_VER(display) == 30) + latency = max_linetime * + DIV_ROUND_UP(latency, max_linetime); + } else { + latency = LNL_PKG_C_LATENCY_MASK; + } + added_waketime = DSB_EXE_TIME + display->sagv.block_time_us; } - display->wm.dpkgc_latency = max_latency; + display->wm.dpkgc_latency = latency; display->wm.dpkgc_added_waketime = added_waketime; return 0; -- 2.34.1
