diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-02-03 11:30:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 10:26:52 +0100 |
| commit | 0a35ff986617b158a5ea100498e957fc4382869a (patch) | |
| tree | 5992776badbdf17f9c3e56c2a4b554d38175b820 | |
| parent | 467214ddfa7e4dabd82e54abaa5e71603e4c4f42 (diff) | |
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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210203093044.30532-1-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
(cherry picked from commit 41751b3e5c1ac656a86f8d45a8891115281b729e)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_hdmi.c | 6 |
1 files changed, 5 insertions, 1 deletions
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; |