drm/i915: Split skl_get_dpll()

Split out the DisplayPort and HDMI pll setup code into separate
functions and refactor the DP code does not directly depend on
crtc state, so that the code can be used for upfront link training.

Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 6fc32cf2b83d0c1bb479285dd74cc043122222c1..c6d6895341407ea25ad6ebab945255ba9b4ee920 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -1172,75 +1172,110 @@ skip_remaining_dividers:
        return true;
 }
 
-static struct intel_shared_dpll *
-skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
-            struct intel_encoder *encoder)
+static bool skl_ddi_hdmi_pll_dividers(struct intel_crtc *crtc,
+                                     struct intel_crtc_state *crtc_state,
+                                     int clock)
 {
-       struct intel_shared_dpll *pll;
        uint32_t ctrl1, cfgcr1, cfgcr2;
-       int clock = crtc_state->port_clock;
+       struct skl_wrpll_params wrpll_params = { 0, };
 
        /*
         * See comment in intel_dpll_hw_state to understand why we always use 0
         * as the DPLL id in this function.
         */
-
        ctrl1 = DPLL_CTRL1_OVERRIDE(0);
 
-       if (encoder->type == INTEL_OUTPUT_HDMI) {
-               struct skl_wrpll_params wrpll_params = { 0, };
+       ctrl1 |= DPLL_CTRL1_HDMI_MODE(0);
 
-               ctrl1 |= DPLL_CTRL1_HDMI_MODE(0);
+       if (!skl_ddi_calculate_wrpll(clock * 1000, &wrpll_params))
+               return false;
 
-               if (!skl_ddi_calculate_wrpll(clock * 1000, &wrpll_params))
-                       return NULL;
+       cfgcr1 = DPLL_CFGCR1_FREQ_ENABLE |
+               DPLL_CFGCR1_DCO_FRACTION(wrpll_params.dco_fraction) |
+               wrpll_params.dco_integer;
+
+       cfgcr2 = DPLL_CFGCR2_QDIV_RATIO(wrpll_params.qdiv_ratio) |
+               DPLL_CFGCR2_QDIV_MODE(wrpll_params.qdiv_mode) |
+               DPLL_CFGCR2_KDIV(wrpll_params.kdiv) |
+               DPLL_CFGCR2_PDIV(wrpll_params.pdiv) |
+               wrpll_params.central_freq;
+
+       memset(&crtc_state->dpll_hw_state, 0,
+              sizeof(crtc_state->dpll_hw_state));
+
+       crtc_state->dpll_hw_state.ctrl1 = ctrl1;
+       crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
+       crtc_state->dpll_hw_state.cfgcr2 = cfgcr2;
+       return true;
+}
+
+
+bool skl_ddi_dp_set_dpll_hw_state(int clock,
+                                 struct intel_dpll_hw_state *dpll_hw_state)
+{
+       uint32_t ctrl1;
+
+       /*
+        * See comment in intel_dpll_hw_state to understand why we always use 0
+        * as the DPLL id in this function.
+        */
+       ctrl1 = DPLL_CTRL1_OVERRIDE(0);
+       switch (clock / 2) {
+       case 81000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, 0);
+               break;
+       case 135000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, 0);
+               break;
+       case 270000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, 0);
+               break;
+               /* eDP 1.4 rates */
+       case 162000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, 0);
+               break;
+       case 108000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, 0);
+               break;
+       case 216000:
+               ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, 0);
+               break;
+       }
 
-               cfgcr1 = DPLL_CFGCR1_FREQ_ENABLE |
-                        DPLL_CFGCR1_DCO_FRACTION(wrpll_params.dco_fraction) |
-                        wrpll_params.dco_integer;
+       dpll_hw_state->ctrl1 = ctrl1;
+       return true;
+}
 
-               cfgcr2 = DPLL_CFGCR2_QDIV_RATIO(wrpll_params.qdiv_ratio) |
-                        DPLL_CFGCR2_QDIV_MODE(wrpll_params.qdiv_mode) |
-                        DPLL_CFGCR2_KDIV(wrpll_params.kdiv) |
-                        DPLL_CFGCR2_PDIV(wrpll_params.pdiv) |
-                        wrpll_params.central_freq;
+static struct intel_shared_dpll *
+skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
+            struct intel_encoder *encoder)
+{
+       struct intel_shared_dpll *pll;
+       int clock = crtc_state->port_clock;
+       bool bret;
+       struct intel_dpll_hw_state dpll_hw_state;
+
+       memset(&dpll_hw_state, 0, sizeof(dpll_hw_state));
+
+       if (encoder->type == INTEL_OUTPUT_HDMI) {
+               bret = skl_ddi_hdmi_pll_dividers(crtc, crtc_state, clock);
+               if (!bret) {
+                       DRM_DEBUG_KMS("Could not get HDMI pll dividers.\n");
+                       return NULL;
+               }
        } else if (encoder->type == INTEL_OUTPUT_DP ||
                   encoder->type == INTEL_OUTPUT_DP_MST ||
                   encoder->type == INTEL_OUTPUT_EDP) {
-               switch (crtc_state->port_clock / 2) {
-               case 81000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, 0);
-                       break;
-               case 135000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, 0);
-                       break;
-               case 270000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, 0);
-                       break;
-               /* eDP 1.4 rates */
-               case 162000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, 0);
-                       break;
-               case 108000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, 0);
-                       break;
-               case 216000:
-                       ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, 0);
-                       break;
+               bret = skl_ddi_dp_set_dpll_hw_state(clock, &dpll_hw_state);
+               if (!bret) {
+                       DRM_DEBUG_KMS("Could not set DP dpll HW state.\n");
+                       return NULL;
                }
-
-               cfgcr1 = cfgcr2 = 0;
+               crtc_state->dpll_hw_state = dpll_hw_state;
        } else {
                return NULL;
        }
 
-       memset(&crtc_state->dpll_hw_state, 0,
-              sizeof(crtc_state->dpll_hw_state));
-
-       crtc_state->dpll_hw_state.ctrl1 = ctrl1;
-       crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
-       crtc_state->dpll_hw_state.cfgcr2 = cfgcr2;
-
        if (encoder->type == INTEL_OUTPUT_EDP)
                pll = intel_find_shared_dpll(crtc, crtc_state,
                                             DPLL_ID_SKL_DPLL0,

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.h b/drivers/gpu/drm/i915/intel_dpll_mgr.h
index 11a85a53ab404fcd4b25fbb070e775bc6740498f..cb28f8df8701a625517ddbbcd9180bb8b275c506 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.h
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.h
@@ -164,4 +164,8 @@ void intel_shared_dpll_init(struct drm_device *dev);
 bool bxt_ddi_dp_set_dpll_hw_state(int clock,
                          struct intel_dpll_hw_state *dpll_hw_state);
 
+/* SKL dpll related functions */
+bool skl_ddi_dp_set_dpll_hw_state(int clock,
+                                 struct intel_dpll_hw_state *dpll_hw_state);
+
 #endif /* _INTEL_DPLL_MGR_H_ */