drm/i915/icl: Fix port disable sequence for mipi-dsi

Re-enable clock gating of DDI clocks.

v2: Fix the default ddi clk state for mipi-dsi (Imre)

Fixes: 1026bea00381 ("drm/i915/icl: Ungate DSI clocks")
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553513202-13863-2-git-send-email-vandita.kulkarni@intel.com

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index be1cfbc..9d962ea 100644 (file)
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -1138,7 +1138,7 @@ static void gen11_dsi_disable_port(struct intel_encoder *encoder)
                        DRM_ERROR("DDI port:%c buffer not idle\n",
                                  port_name(port));
        }
-       gen11_dsi_ungate_clocks(encoder);
+       gen11_dsi_gate_clocks(encoder);
 }
 
 static void gen11_dsi_disable_io_power(struct intel_encoder *encoder)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 0ab3a8a..3ae5527 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2802,10 +2802,10 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
                                return;
                }
                /*
-                * DSI ports should have their DDI clock ungated when disabled
-                * and gated when enabled.
+                * For DSI we keep the ddi clocks gated
+                * except during enable/disable sequence.
                 */
-               ddi_clk_needed = !encoder->base.crtc;
+               ddi_clk_needed = false;
        }
 
        val = I915_READ(DPCLKA_CFGCR0_ICL);