From: "Kumar, Mahesh" <mahesh1.kumar@xxxxxxxxx> IF IPC is enabled LINETIME_WM value should be half of calculated value line time = ROUNDDOWN(1/2 * Calculated Line Time) Earlier code was rounding-up the value, But updated Bspec says we should take the ROUNDDOWN. This patch corrects that as well. Signed-off-by: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_pm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 9a2ed1b734d5..dac0fcf8b54e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4571,9 +4571,10 @@ skl_compute_linetime_wm(struct intel_crtc_state *cstate) linetime_wm = fixed16_to_u32_round_up(mul_u32_fixed16(8, linetime_us)); - /* Display WA #1135: bxt. */ - if (IS_BROXTON(dev_priv) && dev_priv->ipc_enabled) - linetime_wm = DIV_ROUND_UP(linetime_wm, 2); + /* Display WA #1135: bxt:ALL GLK:ALL */ + if ((IS_BROXTON(dev_priv) || IS_GEMINILAKE(dev_priv)) && + dev_priv->ipc_enabled) + linetime_wm /= 2; return linetime_wm; } -- 2.13.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
