drm/i915/tgl: Add DC3CO mask to allowed_dc_mask and gen9_dc_mask

Enable dc3co state in enable_dc module param and add dc3co
enable mask to allowed_dc_mask and gen9_dc_mask.

v1: Adding enable_dc=3,4 options to enable DC3CO with DC5 and DC6
    independently. [Animesh]
v2: Using a switch statement for cleaner code. [Animesh]

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191003081738.22101-3-anshuman.gupta@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 0616284..c00cf06 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -695,7 +695,11 @@ static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
        u32 mask;
 
        mask = DC_STATE_EN_UPTO_DC5;
-       if (INTEL_GEN(dev_priv) >= 11)
+
+       if (INTEL_GEN(dev_priv) >= 12)
+               mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC6
+                                         | DC_STATE_EN_DC9;
+       else if (IS_GEN(dev_priv, 11))
                mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9;
        else if (IS_GEN9_LP(dev_priv))
                mask |= DC_STATE_EN_DC9;
@@ -3924,14 +3928,17 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
        int requested_dc;
        int max_dc;
 
-       if (INTEL_GEN(dev_priv) >= 11) {
-               max_dc = 2;
+       if (INTEL_GEN(dev_priv) >= 12) {
+               max_dc = 4;
                /*
                 * DC9 has a separate HW flow from the rest of the DC states,
                 * not depending on the DMC firmware. It's needed by system
                 * suspend/resume, so allow it unconditionally.
                 */
                mask = DC_STATE_EN_DC9;
+       } else if (IS_GEN(dev_priv, 11)) {
+               max_dc = 2;
+               mask = DC_STATE_EN_DC9;
        } else if (IS_GEN(dev_priv, 10) || IS_GEN9_BC(dev_priv)) {
                max_dc = 2;
                mask = 0;
@@ -3950,7 +3957,7 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
                requested_dc = enable_dc;
        } else if (enable_dc == -1) {
                requested_dc = max_dc;
-       } else if (enable_dc > max_dc && enable_dc <= 2) {
+       } else if (enable_dc > max_dc && enable_dc <= 4) {
                DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n",
                              enable_dc, max_dc);
                requested_dc = max_dc;
@@ -3959,10 +3966,20 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
                requested_dc = max_dc;
        }
 
-       if (requested_dc > 1)
+       switch (requested_dc) {
+       case 4:
+               mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC6;
+               break;
+       case 3:
+               mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC5;
+               break;
+       case 2:
                mask |= DC_STATE_EN_UPTO_DC6;
-       if (requested_dc > 0)
+               break;
+       case 1:
                mask |= DC_STATE_EN_UPTO_DC5;
+               break;
+       }
 
        DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask);
 

diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 296452f..4f1806f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -46,7 +46,8 @@ i915_param_named(modeset, int, 0400,
 
 i915_param_named_unsafe(enable_dc, int, 0400,
        "Enable power-saving display C-states. "
-       "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
+       "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; "
+       "3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)");
 
 i915_param_named_unsafe(enable_fbc, int, 0600,
        "Enable frame buffer compression for power savings "