[PATCH v4 2/5] drm/i915/gen11: Program DPCLKA_CFGCR0_ICL according to PHY

[Matt Roper <matthew.d.roper@intel.com>]

Although the register name implies that it operates on DDI's,
DPCLKA_CFGCR0_ICL actually needs to be programmed according to the PHY
that's in use.  I.e., when using EHL's DDI-D on combo PHY A, the bits
described as "port A" in the bspec are what we need to set.  The bspec
clarifies:

        "[For EHL] DDID clock tied to DDIA clock, so DPCLKA_CFGCR0 DDIA
        Clock Select chooses the PLL for both DDIA and DDID and drives
        port A in all cases."

Also, since the CNL DPCLKA_CFGCR0 bit defines are still port-based, we
create separate ICL-specific defines that accept the PHY rather than
trying to share the same bit definitions between CNL and ICL.

Bspec: 33148
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c   | 17 +++++++----
 drivers/gpu/drm/i915/display/intel_ddi.c | 36 ++++++++++++++++--------
 drivers/gpu/drm/i915/i915_reg.h          | 12 +++++---
 3 files changed, 44 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index b8673debf932..f574af62888c 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -560,11 +560,13 @@ static void gen11_dsi_gate_clocks(struct intel_encoder *encoder)
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 	u32 tmp;
 	enum port port;
+	enum phy phy;
 
 	mutex_lock(&dev_priv->dpll_lock);
 	tmp = I915_READ(DPCLKA_CFGCR0_ICL);
 	for_each_dsi_port(port, intel_dsi->ports) {
-		tmp |= DPCLKA_CFGCR0_DDI_CLK_OFF(port);
+		phy = intel_port_to_phy(dev_priv, port);
+		tmp |= ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 	}
 
 	I915_WRITE(DPCLKA_CFGCR0_ICL, tmp);
@@ -577,11 +579,13 @@ static void gen11_dsi_ungate_clocks(struct intel_encoder *encoder)
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 	u32 tmp;
 	enum port port;
+	enum phy phy;
 
 	mutex_lock(&dev_priv->dpll_lock);
 	tmp = I915_READ(DPCLKA_CFGCR0_ICL);
 	for_each_dsi_port(port, intel_dsi->ports) {
-		tmp &= ~DPCLKA_CFGCR0_DDI_CLK_OFF(port);
+		phy = intel_port_to_phy(dev_priv, port);
+		tmp &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 	}
 
 	I915_WRITE(DPCLKA_CFGCR0_ICL, tmp);
@@ -595,19 +599,22 @@ static void gen11_dsi_map_pll(struct intel_encoder *encoder,
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
 	enum port port;
+	enum phy phy;
 	u32 val;
 
 	mutex_lock(&dev_priv->dpll_lock);
 
 	val = I915_READ(DPCLKA_CFGCR0_ICL);
 	for_each_dsi_port(port, intel_dsi->ports) {
-		val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
-		val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
+		phy = intel_port_to_phy(dev_priv, port);
+		val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+		val |= ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
 	}
 	I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 
 	for_each_dsi_port(port, intel_dsi->ports) {
-		val &= ~DPCLKA_CFGCR0_DDI_CLK_OFF(port);
+		phy = intel_port_to_phy(dev_priv, port);
+		val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 	}
 	I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index a4172595c8d8..a40a53527d99 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2747,22 +2747,32 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
-	enum port port = encoder->port;
+	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
 	u32 val;
 
 	mutex_lock(&dev_priv->dpll_lock);
 
 	val = I915_READ(DPCLKA_CFGCR0_ICL);
-	WARN_ON((val & icl_dpclka_cfgcr0_clk_off(dev_priv, port)) == 0);
+	WARN_ON((val & icl_dpclka_cfgcr0_clk_off(dev_priv, phy)) == 0);
 
-	if (intel_port_is_combophy(dev_priv, port)) {
-		val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
-		val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
+	if (intel_phy_is_combo(dev_priv, phy)) {
+		/*
+		 * Even though this register references DDIs, note that we
+		 * want to pass the PHY rather than the port (DDI).  For
+		 * ICL, port=phy in all cases so it doesn't matter, but for
+		 * EHL the bspec notes the following:
+		 *
+		 *   "DDID clock tied to DDIA clock, so DPCLKA_CFGCR0 DDIA
+		 *   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);
 		I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 		POSTING_READ(DPCLKA_CFGCR0_ICL);
 	}
 
-	val &= ~icl_dpclka_cfgcr0_clk_off(dev_priv, port);
+	val &= ~icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
 	I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 
 	mutex_unlock(&dev_priv->dpll_lock);
@@ -2771,13 +2781,13 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
 static void icl_unmap_plls_to_ports(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = encoder->port;
+	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
 	u32 val;
 
 	mutex_lock(&dev_priv->dpll_lock);
 
 	val = I915_READ(DPCLKA_CFGCR0_ICL);
-	val |= icl_dpclka_cfgcr0_clk_off(dev_priv, port);
+	val |= icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
 	I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 
 	mutex_unlock(&dev_priv->dpll_lock);
@@ -2838,9 +2848,11 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
 
 	val = I915_READ(DPCLKA_CFGCR0_ICL);
 	for_each_port_masked(port, port_mask) {
+		enum phy phy = intel_port_to_phy(dev_priv, port);
+
 		bool ddi_clk_ungated = !(val &
 					 icl_dpclka_cfgcr0_clk_off(dev_priv,
-								   port));
+								   phy));
 
 		if (ddi_clk_needed == ddi_clk_ungated)
 			continue;
@@ -2852,9 +2864,9 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
 		if (WARN_ON(ddi_clk_needed))
 			continue;
 
-		DRM_NOTE("Port %c is disabled/in DSI mode with an ungated DDI clock, gate it\n",
-			 port_name(port));
-		val |= icl_dpclka_cfgcr0_clk_off(dev_priv, port);
+		DRM_NOTE("PHY %c is disabled/in DSI mode with an ungated DDI clock, gate it\n",
+			 phy_name(port));
+		val |= icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
 		I915_WRITE(DPCLKA_CFGCR0_ICL, val);
 	}
 }
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c814cc1b3ae5..c9e2e09b6f01 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9680,17 +9680,21 @@ enum skl_power_gate {
  * CNL Clocks
  */
 #define DPCLKA_CFGCR0				_MMIO(0x6C200)
-#define DPCLKA_CFGCR0_ICL			_MMIO(0x164280)
 #define  DPCLKA_CFGCR0_DDI_CLK_OFF(port)	(1 << ((port) ==  PORT_F ? 23 : \
 						      (port) + 10))
-#define  ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(port)   (1 << ((port) + 10))
-#define  ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port) (1 << ((tc_port) == PORT_TC4 ? \
-						      21 : (tc_port) + 12))
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port)	((port) == PORT_F ? 21 : \
 						(port) * 2)
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port)	(3 << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port)	((pll) << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
 
+#define DPCLKA_CFGCR0_ICL			_MMIO(0x164280)
+#define  ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)	(1 << _PICK(phy, 10, 11, 24))
+#define  ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port) (1 << ((tc_port) == PORT_TC4 ? \
+						      21 : (tc_port) + 12))
+#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))
+
 /* CNL PLL */
 #define DPLL0_ENABLE		0x46010
 #define DPLL1_ENABLE		0x46014
-- 
2.17.2

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