From: Ville Syrjälä Date: Wed, 3 Feb 2021 09:30:44 +0000 (+0200) Subject: drm/i915: Reject 446-480MHz HDMI clock on GLK X-Git-Tag: v5.4.102~13 X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=0a35ff986617b158a5ea100498e957fc4382869a;p=wrapfs-5.3.y.git drm/i915: Reject 446-480MHz HDMI clock on GLK commit 7a6c6243b44a439bda4bf099032be35ebcf53406 upstream. The BXT/GLK DPLL can't generate certain frequencies. We already reject the 233-240MHz range on both. But on GLK the DPLL max frequency was bumped from 300MHz to 594MHz, so now we get to also worry about the 446-480MHz range (double the original problem range). Reject any frequency within the higher problematic range as well. Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3000 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210203093044.30532-1-ville.syrjala@linux.intel.com Reviewed-by: Mika Kahola (cherry picked from commit 41751b3e5c1ac656a86f8d45a8891115281b729e) Signed-off-by: Rodrigo Vivi Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index b030f7ae3302..4cf95e8031e3 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2129,7 +2129,11 @@ hdmi_port_clock_valid(struct intel_hdmi *hdmi, if (clock > hdmi_port_clock_limit(hdmi, respect_downstream_limits, force_dvi)) return MODE_CLOCK_HIGH; - /* BXT DPLL can't generate 223-240 MHz */ + /* GLK DPLL can't generate 446-480 MHz */ + if (IS_GEMINILAKE(dev_priv) && clock > 446666 && clock < 480000) + return MODE_CLOCK_RANGE; + + /* BXT/GLK DPLL can't generate 223-240 MHz */ if (IS_GEN9_LP(dev_priv) && clock > 223333 && clock < 240000) return MODE_CLOCK_RANGE;