From efaa1177c31be89483dfd3919348b3535f602b5e Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 1 Apr 2025 19:37:49 +0300 Subject: [PATCH] drm/i915: Apply the combo PLL frac w/a on DG1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit DG1 apparently needs the combo PLL fractional divider w/a with 38.4 MHz refclk as well. This isn't listed in bspec, but looking at the hsd it looks like it was possibly just missed due to no one having a DG1 around at the time. This gives us slightly more accurate clocks on DG1. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20250401163752.6412-2-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak --- drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c index ec7feef1ef59..76ab55ee4b80 100644 --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c @@ -2604,6 +2604,7 @@ ehl_combo_pll_div_frac_wa_needed(struct intel_display *display) { return ((display->platform.elkhartlake && IS_DISPLAY_STEP(display, STEP_B0, STEP_FOREVER)) || + display->platform.dg1 || display->platform.tigerlake || display->platform.alderlake_s || display->platform.alderlake_p) && -- 2.50.1