This is a note to let you know that I've just added the patch titled drm/i915: Implement w/a 22010492432 for adl-s to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-i915-implement-w-a-22010492432-for-adl-s.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 13bd259b64bb58ae130923ada42ebc19bf3f2fa2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx> Date: Mon, 13 Jun 2022 23:14:39 +0300 Subject: drm/i915: Implement w/a 22010492432 for adl-s MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> commit 13bd259b64bb58ae130923ada42ebc19bf3f2fa2 upstream. adl-s needs the combo PLL DCO fraction w/a as well. Gets us slightly more accurate clock out of the PLL. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20220613201439.23341-1-ville.syrjala@xxxxxxxxxxxxxxx Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx> (cherry picked from commit d36bdd77b9e6aa7f5cb7b0f11ebbab8e5febf10b) Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c @@ -2434,7 +2434,7 @@ static void icl_wrpll_params_populate(st } /* - * Display WA #22010492432: ehl, tgl, adl-p + * Display WA #22010492432: ehl, tgl, adl-s, adl-p * Program half of the nominal DCO divider fraction value. */ static bool @@ -2442,7 +2442,7 @@ ehl_combo_pll_div_frac_wa_needed(struct { return ((IS_PLATFORM(i915, INTEL_ELKHARTLAKE) && IS_JSL_EHL_DISPLAY_STEP(i915, STEP_B0, STEP_FOREVER)) || - IS_TIGERLAKE(i915) || IS_ALDERLAKE_P(i915)) && + IS_TIGERLAKE(i915) || IS_ALDERLAKE_S(i915) || IS_ALDERLAKE_P(i915)) && i915->dpll.ref_clks.nssc == 38400; } Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are queue-5.15/drm-i915-implement-w-a-22010492432-for-adl-s.patch