drm/i915/bxt: Add MST support when do DPLL calculation

commit 789ea12500e5ce3911d0a6a822277c3133451927 upstream.

Add the missing INTEL_OUTPUT_DP_MST case in bxt_get_dpll()
to correctly initialize the crtc_state and port plls when
link training a DP MST monitor on BXT/APL devices.

Fixes: a277ca7dc01d ("drm/i915: Split bxt_ddi_pll_select()")
Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=99572
Reviewed-by: Cooper Chiou <cooper.chiou@intel.com>
Reviewed-by: Gary C Wang <gary.c.wang@intel.com>
Reviewed-by: Ciobanu, Nathan D <nathan.d.ciobanu@intel.com>
Reviewed-by: Herbert, Marc <marc.herbert@intel.com>
Reviewed-by: Bride, Jim <jim.bride@intel.com>
Reviewed-by: Navare, Manasi D <manasi.d.navare@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Lee, Shawn C <shawn.c.lee@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486096329-6255-1-git-send-email-shawn.c.lee@intel.com
(cherry picked from commit 0aab2c721d81590012a5021a516f00666646741f)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 1c59ca50c4309c7f92f28c4bec7d95d2ef18aedc..cae27c55dd9962d27a5cc16dcd80bb598f92d1eb 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -1723,7 +1723,8 @@ bxt_get_dpll(struct intel_crtc *crtc,
                return NULL;
 
        if ((encoder->type == INTEL_OUTPUT_DP ||
-            encoder->type == INTEL_OUTPUT_EDP) &&
+            encoder->type == INTEL_OUTPUT_EDP ||
+            encoder->type == INTEL_OUTPUT_DP_MST) &&
            !bxt_ddi_dp_set_dpll_hw_state(clock, &dpll_hw_state))
                return NULL;