diff options
| author | José Roberto de Souza <jose.souza@intel.com> | 2019-07-30 10:51:21 -0700 |
|---|---|---|
| committer | José Roberto de Souza <jose.souza@intel.com> | 2019-07-31 10:52:18 -0700 |
| commit | c2052d6e242c33594db90751a361aca1065a054a (patch) | |
| tree | 3f71854943fdaf12941e3d1f4de0d67ec968953b /drivers/gpu/drm/i915/display/intel_ddi.c | |
| parent | 1b6c3c6d4607784c83160cf7fb9c94fae5c117a1 (diff) | |
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 <matthew.d.roper@intel.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Tested-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190730175121.16413-1-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_ddi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_ddi.c | 9 |
1 files changed, 8 insertions, 1 deletions
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) | |