From: Ville Syrjälä Date: Thu, 15 Jul 2021 09:35:19 +0000 (+0300) Subject: drm/i915: Clean up gen2 DPLL readout X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=6501e6bb1458c2e61b0158625518c19bef9c7dce;p=uclinux-h8%2Flinux.git drm/i915: Clean up gen2 DPLL readout The current gen2 DPLL readout code: * assumes i845/i865 have LVDS which is not true * assumes only pipe B can drive LVDS (true, but makes the code appear a bit magical) * hard to parse in general Clean it up by checking for i85x (the only gen2 platform with LVDS) and reusing intel_lvds_port_enabled(). Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-3-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 794690c0dba5..13a92a3acb73 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -6319,7 +6319,6 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc, { struct drm_device *dev = crtc->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); - enum pipe pipe = crtc->pipe; u32 dpll = pipe_config->dpll_hw_state.dpll; u32 fp; struct dpll clock; @@ -6369,11 +6368,13 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc, else port_clock = i9xx_calc_dpll_params(refclk, &clock); } else { - u32 lvds = IS_I830(dev_priv) ? 0 : intel_de_read(dev_priv, - LVDS); - bool is_lvds = (pipe == 1) && (lvds & LVDS_PORT_EN); + enum pipe lvds_pipe; + + if (IS_I85X(dev_priv) && + intel_lvds_port_enabled(dev_priv, LVDS, &lvds_pipe) && + lvds_pipe == crtc->pipe) { + u32 lvds = intel_de_read(dev_priv, LVDS); - if (is_lvds) { clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >> DPLL_FPA01_P1_POST_DIV_SHIFT);