1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7b1b18d8f45c..8c4e384b8ae1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7951,12 +7951,17 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
                 else
                         i9xx_clock(refclk, &clock);
         } else {
-                bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
+                u32 lvds = I915_READ(LVDS);
+                bool is_lvds = (pipe == 1) && (lvds & LVDS_PORT_EN);
 
                 if (is_lvds) {
                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
-                        clock.p2 = 14;
+
+                        if (lvds & LVDS_CLKB_POWER_UP)
+                                clock.p2 = 7;
+                        else
+                                clock.p2 = 14;
                 } else {
                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
                                 clock.p1 = 2;