From: Ville Syrjälä Date: Tue, 15 Mar 2016 14:40:01 +0000 (+0200) Subject: drm/i915: Don't read out port_clock on CHV when DPLL is disabled X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b521973b45efe496ef7482a1ef98a2986c57839e;p=linux-beck.git drm/i915: Don't read out port_clock on CHV when DPLL is disabled Check whether the DPLL is even enabled before readoing out the dividers and trying to derive port_clock on CHV. We already did this on VLV. Also remove the comment "MIPI" comment from the VLV code since we call this function whenever the pipe is enabled. Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1458052809-23426-9-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f3b58829e350..607dc41bcc68 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8009,8 +8009,8 @@ static void vlv_crtc_clock_get(struct intel_crtc *crtc, u32 mdiv; int refclk = 100000; - /* In case of MIPI DPLL will not even be used */ - if (!(pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)) + /* In case of DSI, DPLL will not be used */ + if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0) return; mutex_lock(&dev_priv->sb_lock); @@ -8106,6 +8106,10 @@ static void chv_crtc_clock_get(struct intel_crtc *crtc, u32 cmn_dw13, pll_dw0, pll_dw1, pll_dw2, pll_dw3; int refclk = 100000; + /* In case of DSI, DPLL will not be used */ + if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0) + return; + mutex_lock(&dev_priv->sb_lock); cmn_dw13 = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW13(port)); pll_dw0 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW0(port));