drm/i915/icl: Disable DSI IO power

This patch configures mode of combo phy as DDI and
disable IO power for DDI ports used by DSI.

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b68d767717a3b86c26042d0b16abb3943756fcc4.1540900289.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 44696848ffd7eb1b45d494c6e3162b99504812d5..ac22c74ae1467f626b8682e1bdad98544a4e3a6a 100644 (file)
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -873,6 +873,26 @@ static void gen11_dsi_disable_port(struct intel_encoder *encoder)
        }
 }
 
+static void gen11_dsi_disable_io_power(struct intel_encoder *encoder)
+{
+       struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+       struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+       enum port port;
+       u32 tmp;
+
+       intel_display_power_put(dev_priv, POWER_DOMAIN_PORT_DDI_A_IO);
+
+       if (intel_dsi->dual_link)
+               intel_display_power_put(dev_priv, POWER_DOMAIN_PORT_DDI_B_IO);
+
+       /* set mode to DDI */
+       for_each_dsi_port(port, intel_dsi->ports) {
+               tmp = I915_READ(ICL_DSI_IO_MODECTL(port));
+               tmp &= ~COMBO_PHY_MODE_DSI;
+               I915_WRITE(ICL_DSI_IO_MODECTL(port), tmp);
+       }
+}
+
 static void __attribute__((unused)) gen11_dsi_disable(
                        struct intel_encoder *encoder,
                        const struct intel_crtc_state *old_crtc_state,
@@ -895,4 +915,7 @@ static void __attribute__((unused)) gen11_dsi_disable(
 
        /* step3: disable port */
        gen11_dsi_disable_port(encoder);
+
+       /* step4: disable IO power */
+       gen11_dsi_disable_io_power(encoder);
 }