drm/i915/rkl: Handle new DPCLKA_CFGCR0 layout

RKL uses a slightly different bit layout for the DPCLKA_CFGCR0 register.

v2:
 - Fix inverted mask application when updating ICL_DPCLKA_CFGCR0
 - Checkpatch style fixes

Bspec: 50287
Cc: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716220551.2730644-2-matthew.d.roper@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -2845,7 +2845,9 @@ hsw_set_signal_levels(struct intel_dp *intel_dp)
 static u32 icl_dpclka_cfgcr0_clk_off(struct drm_i915_private *dev_priv,
 				     enum phy phy)
 {
-	if (intel_phy_is_combo(dev_priv, phy)) {
+	if (IS_ROCKETLAKE(dev_priv)) {
+		return RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+	} else if (intel_phy_is_combo(dev_priv, phy)) {
 		return ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 	} else if (intel_phy_is_tc(dev_priv, phy)) {
 		enum tc_port tc_port = intel_port_to_tc(dev_priv,
@@ -2872,6 +2874,16 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
 		    (val & icl_dpclka_cfgcr0_clk_off(dev_priv, phy)) == 0);
 
 	if (intel_phy_is_combo(dev_priv, phy)) {
+		u32 mask, sel;
+
+		if (IS_ROCKETLAKE(dev_priv)) {
+			mask = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+			sel = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
+		} else {
+			mask = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+			sel = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
+		}
+
 		/*
 		 * Even though this register references DDIs, note that we
 		 * want to pass the PHY rather than the port (DDI).  For
@@ -2882,8 +2894,8 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
 		 *   Clock Select chooses the PLL for both DDIA and DDID and
 		 *   drives port A in all cases."
 		 */
-		val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
-		val |= ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
+		val &= ~mask;
+		val |= sel;
 		intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
 		intel_de_posting_read(dev_priv, ICL_DPCLKA_CFGCR0);
 	}

drivers/gpu/drm/i915/display/intel_display.c

@@ -10802,9 +10802,18 @@ static void icl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
 	u32 temp;
 
 	if (intel_phy_is_combo(dev_priv, phy)) {
-		temp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0) &
-			ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
-		id = temp >> ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy);
+		u32 mask, shift;
+
+		if (IS_ROCKETLAKE(dev_priv)) {
+			mask = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+			shift = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy);
+		} else {
+			mask = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+			shift = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy);
+		}
+
+		temp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0) & mask;
+		id = temp >> shift;
 		port_dpll_id = ICL_PORT_DPLL_DEFAULT;
 	} else if (intel_phy_is_tc(dev_priv, phy)) {
 		u32 clk_sel = intel_de_read(dev_priv, DDI_CLK_SEL(port)) & DDI_CLK_SEL_MASK;

drivers/gpu/drm/i915/i915_reg.h

@@ -10279,12 +10279,18 @@ enum skl_power_gate {
 
 #define ICL_DPCLKA_CFGCR0			_MMIO(0x164280)
 #define  ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)	(1 << _PICK(phy, 10, 11, 24))
+#define  RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)	REG_BIT((phy) + 10)
 #define  ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port)	(1 << ((tc_port) < PORT_TC4 ? \
 						       (tc_port) + 12 : \
 						       (tc_port) - PORT_TC4 + 21))
 #define  ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy)	((phy) * 2)
 #define  ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy)	(3 << ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
 #define  ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy)	((pll) << ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
+#define  RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy)	_PICK(phy, 0, 2, 4, 27)
+#define  RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy) \
+	(3 << RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
+#define  RKL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) \
+	((pll) << RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
 
 /* CNL PLL */
 #define DPLL0_ENABLE		0x46010