From: José Roberto de Souza Date: Tue, 30 Jul 2019 17:51:21 +0000 (-0700) Subject: drm/i915/ehl: Ungate DDIC and DDID X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c2052d6e242c33594db90751a361aca1065a054a;p=openwrt%2Fstaging%2Fblogic.git drm/i915/ehl: Ungate DDIC and DDID Specification states that DDI_CLK_SEL needs to be mapped to MG clock even if MG do not exist on EHL, this will ungate those DDIs. BSpec: 20845 Cc: Matt Roper Cc: Vivek Kasireddy Signed-off-by: José Roberto de Souza Reviewed-by: Matt Roper Tested-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20190730175121.16413-1-jose.souza@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index c6f38c7b397d..fb58845020dc 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2921,6 +2921,12 @@ static void intel_ddi_clk_select(struct intel_encoder *encoder, if (!intel_phy_is_combo(dev_priv, phy)) I915_WRITE(DDI_CLK_SEL(port), icl_pll_to_ddi_clk_sel(encoder, crtc_state)); + else if (IS_ELKHARTLAKE(dev_priv) && port >= PORT_C) + /* + * MG does not exist but the programming is required + * to ungate DDIC and DDID + */ + I915_WRITE(DDI_CLK_SEL(port), DDI_CLK_SEL_MG); } else if (IS_CANNONLAKE(dev_priv)) { /* Configure DPCLKA_CFGCR0 to map the DPLL to the DDI. */ val = I915_READ(DPCLKA_CFGCR0); @@ -2961,7 +2967,8 @@ static void intel_ddi_clk_disable(struct intel_encoder *encoder) enum phy phy = intel_port_to_phy(dev_priv, port); if (INTEL_GEN(dev_priv) >= 11) { - if (!intel_phy_is_combo(dev_priv, phy)) + if (!intel_phy_is_combo(dev_priv, phy) || + (IS_ELKHARTLAKE(dev_priv) && port >= PORT_C)) I915_WRITE(DDI_CLK_SEL(port), DDI_CLK_SEL_NONE); } else if (IS_CANNONLAKE(dev_priv)) { I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) |