drm/meson: add support for HDMI clock support

This patchs adds support for the supported HDMI modes clocks frequencies.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

drivers/gpu/drm/meson/meson_vclk.c

@@ -27,9 +27,26 @@
  * VCLK is the "Pixel Clock" frequency generator from a dedicated PLL.
  * We handle the following encodings :
  * - CVBS 27MHz generator via the VCLK2 to the VENCI and VDAC blocks
- *
- * What is missing :
  * - HDMI Pixel Clocks generation
+ * What is missing :
+ * - Genenate Pixel clocks for 2K/4K 10bit formats
+ *
+ * Clock generator scheme :
+ *  __________   _________            _____
+ * |          | |         |          |     |--ENCI
+ * | HDMI PLL |-| PLL_DIV |--- VCLK--|     |--ENCL
+ * |__________| |_________| \        | MUX |--ENCP
+ *                           --VCLK2-|     |--VDAC
+ *                                   |_____|--HDMI-TX
+ *
+ * Final clocks can take input for either VCLK or VCLK2, but
+ * VCLK is the preferred path for HDMI clocking and VCLK2 is the
+ * preferred path for CVBS VDAC clocking.
+ *
+ * VCLK and VCLK2 have fixed divided clocks paths for /1, /2, /4, /6 or /12.
+ *
+ * The PLL_DIV can achieve an additional fractional dividing like
+ * 1.5, 3.5, 3.75... to generate special 2K and 4K 10bit clocks.
  */
 
 /* HHI Registers */
@@ -50,11 +67,34 @@
 #define VCLK2_SOFT_RESET	BIT(15)
 #define VCLK2_DIV1_EN		BIT(0)
 #define HHI_VID_CLK_DIV		0x164 /* 0x59 offset in data sheet */
+#define VCLK_DIV_MASK		0xff
+#define VCLK_DIV_EN		BIT(16)
+#define VCLK_DIV_RESET		BIT(17)
+#define CTS_ENCP_SEL_MASK	(0xf << 24)
+#define CTS_ENCP_SEL_SHIFT	24
 #define CTS_ENCI_SEL_MASK	(0xf << 28)
 #define CTS_ENCI_SEL_SHIFT	28
+#define HHI_VID_CLK_CNTL	0x17c /* 0x5f offset in data sheet */
+#define VCLK_EN			BIT(19)
+#define VCLK_SEL_MASK		(0x7 << 16)
+#define VCLK_SEL_SHIFT		16
+#define VCLK_SOFT_RESET		BIT(15)
+#define VCLK_DIV1_EN		BIT(0)
+#define VCLK_DIV2_EN		BIT(1)
+#define VCLK_DIV4_EN		BIT(2)
+#define VCLK_DIV6_EN		BIT(3)
+#define VCLK_DIV12_EN		BIT(4)
 #define HHI_VID_CLK_CNTL2	0x194 /* 0x65 offset in data sheet */
 #define CTS_ENCI_EN		BIT(0)
+#define CTS_ENCP_EN		BIT(2)
 #define CTS_VDAC_EN		BIT(4)
+#define HDMI_TX_PIXEL_EN	BIT(5)
+#define HHI_HDMI_CLK_CNTL	0x1cc /* 0x73 offset in data sheet */
+#define HDMI_TX_PIXEL_SEL_MASK	(0xf << 16)
+#define HDMI_TX_PIXEL_SEL_SHIFT	16
+#define CTS_HDMI_SYS_SEL_MASK	(0x7 << 9)
+#define CTS_HDMI_SYS_DIV_MASK	(0x7f)
+#define CTS_HDMI_SYS_EN		BIT(8)
 
 #define HHI_VDAC_CNTL0		0x2F4 /* 0xbd offset in data sheet */
 #define HHI_VDAC_CNTL1		0x2F8 /* 0xbe offset in data sheet */
@@ -69,6 +109,126 @@
 #define HDMI_PLL_RESET		BIT(28)
 #define HDMI_PLL_LOCK		BIT(31)
 
+/* VID PLL Dividers */
+enum {
+	VID_PLL_DIV_1 = 0,
+	VID_PLL_DIV_2,
+	VID_PLL_DIV_2p5,
+	VID_PLL_DIV_3,
+	VID_PLL_DIV_3p5,
+	VID_PLL_DIV_3p75,
+	VID_PLL_DIV_4,
+	VID_PLL_DIV_5,
+	VID_PLL_DIV_6,
+	VID_PLL_DIV_6p25,
+	VID_PLL_DIV_7,
+	VID_PLL_DIV_7p5,
+	VID_PLL_DIV_12,
+	VID_PLL_DIV_14,
+	VID_PLL_DIV_15,
+};
+
+void meson_vid_pll_set(struct meson_drm *priv, unsigned int div)
+{
+	unsigned int shift_val = 0;
+	unsigned int shift_sel = 0;
+
+	/* Disable vid_pll output clock */
+	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_EN, 0);
+	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_PRESET, 0);
+
+	switch (div) {
+	case VID_PLL_DIV_2:
+		shift_val = 0x0aaa;
+		shift_sel = 0;
+		break;
+	case VID_PLL_DIV_2p5:
+		shift_val = 0x5294;
+		shift_sel = 2;
+		break;
+	case VID_PLL_DIV_3:
+		shift_val = 0x0db6;
+		shift_sel = 0;
+		break;
+	case VID_PLL_DIV_3p5:
+		shift_val = 0x36cc;
+		shift_sel = 1;
+		break;
+	case VID_PLL_DIV_3p75:
+		shift_val = 0x6666;
+		shift_sel = 2;
+		break;
+	case VID_PLL_DIV_4:
+		shift_val = 0x0ccc;
+		shift_sel = 0;
+		break;
+	case VID_PLL_DIV_5:
+		shift_val = 0x739c;
+		shift_sel = 2;
+		break;
+	case VID_PLL_DIV_6:
+		shift_val = 0x0e38;
+		shift_sel = 0;
+		break;
+	case VID_PLL_DIV_6p25:
+		shift_val = 0x0000;
+		shift_sel = 3;
+		break;
+	case VID_PLL_DIV_7:
+		shift_val = 0x3c78;
+		shift_sel = 1;
+		break;
+	case VID_PLL_DIV_7p5:
+		shift_val = 0x78f0;
+		shift_sel = 2;
+		break;
+	case VID_PLL_DIV_12:
+		shift_val = 0x0fc0;
+		shift_sel = 0;
+		break;
+	case VID_PLL_DIV_14:
+		shift_val = 0x3f80;
+		shift_sel = 1;
+		break;
+	case VID_PLL_DIV_15:
+		shift_val = 0x7f80;
+		shift_sel = 2;
+		break;
+	}
+
+	if (div == VID_PLL_DIV_1)
+		/* Enable vid_pll bypass to HDMI pll */
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   VID_PLL_BYPASS, VID_PLL_BYPASS);
+	else {
+		/* Disable Bypass */
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   VID_PLL_BYPASS, 0);
+		/* Clear sel */
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   3 << 16, 0);
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   VID_PLL_PRESET, 0);
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   0x7fff, 0);
+
+		/* Setup sel and val */
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   3 << 16, shift_sel << 16);
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   VID_PLL_PRESET, VID_PLL_PRESET);
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   0x7fff, shift_val);
+
+		regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				   VID_PLL_PRESET, 0);
+	}
+
+	/* Enable the vid_pll output clock */
+	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
+				VID_PLL_EN, VID_PLL_EN);
+}
+
 /*
  * Setup VCLK2 for 27MHz, and enable clocks for ENCI and VDAC
  *
@@ -110,15 +270,8 @@ static void meson_venci_cvbs_clock_config(struct meson_drm *priv)
 	/* Disable VCLK2 */
 	regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, VCLK2_EN, 0);
 
-	/* Disable vid_pll output clock */
-	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_EN, 0);
-	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_PRESET, 0);
-	/* Enable vid_pll bypass to HDMI pll */
-	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
-				VID_PLL_BYPASS, VID_PLL_BYPASS);
-	/* Enable the vid_pll output clock */
-	regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
-				VID_PLL_EN, VID_PLL_EN);
+	/* Setup vid_pll to /1 */
+	meson_vid_pll_set(priv, VID_PLL_DIV_1);
 
 	/* Setup the VCLK2 divider value to achieve 27MHz */
 	regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV,
@@ -159,9 +312,454 @@ static void meson_venci_cvbs_clock_config(struct meson_drm *priv)
 				CTS_VDAC_EN, CTS_VDAC_EN);
 }
 
+
+/* PLL	O1 O2 O3 VP DV     EN TX */
+/* 4320 /4 /4 /1 /5 /1  => /2 /2 */
+#define MESON_VCLK_HDMI_ENCI_54000	1
+/* 4320 /4 /4 /1 /5 /1  => /1 /2 */
+#define MESON_VCLK_HDMI_DDR_54000	2
+/* 2970 /4 /1 /1 /5 /1  => /1 /2 */
+#define MESON_VCLK_HDMI_DDR_148500	3
+/* 2970 /2 /2 /2 /5 /1  => /1 /1 */
+#define MESON_VCLK_HDMI_74250		4
+/* 2970 /1 /2 /2 /5 /1  => /1 /1 */
+#define MESON_VCLK_HDMI_148500		5
+/* 2970 /1 /1 /1 /5 /2  => /1 /1 */
+#define MESON_VCLK_HDMI_297000		6
+/* 5940 /1 /1 /2 /5 /1  => /1 /1 */
+#define MESON_VCLK_HDMI_594000		7
+
+struct meson_vclk_params {
+	unsigned int pll_base_freq;
+	unsigned int pll_od1;
+	unsigned int pll_od2;
+	unsigned int pll_od3;
+	unsigned int vid_pll_div;
+	unsigned int vclk_div;
+} params[] = {
+	[MESON_VCLK_HDMI_ENCI_54000] = {
+		.pll_base_freq = 4320000,
+		.pll_od1 = 4,
+		.pll_od2 = 4,
+		.pll_od3 = 1,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+	[MESON_VCLK_HDMI_DDR_54000] = {
+		.pll_base_freq = 4320000,
+		.pll_od1 = 4,
+		.pll_od2 = 4,
+		.pll_od3 = 1,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+	[MESON_VCLK_HDMI_DDR_148500] = {
+		.pll_base_freq = 2970000,
+		.pll_od1 = 4,
+		.pll_od2 = 1,
+		.pll_od3 = 1,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+	[MESON_VCLK_HDMI_74250] = {
+		.pll_base_freq = 2970000,
+		.pll_od1 = 2,
+		.pll_od2 = 2,
+		.pll_od3 = 2,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+	[MESON_VCLK_HDMI_148500] = {
+		.pll_base_freq = 2970000,
+		.pll_od1 = 1,
+		.pll_od2 = 2,
+		.pll_od3 = 2,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+	[MESON_VCLK_HDMI_297000] = {
+		.pll_base_freq = 2970000,
+		.pll_od1 = 1,
+		.pll_od2 = 1,
+		.pll_od3 = 1,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 2,
+	},
+	[MESON_VCLK_HDMI_594000] = {
+		.pll_base_freq = 5940000,
+		.pll_od1 = 1,
+		.pll_od2 = 1,
+		.pll_od3 = 2,
+		.vid_pll_div = VID_PLL_DIV_5,
+		.vclk_div = 1,
+	},
+};
+
+static inline unsigned int pll_od_to_reg(unsigned int od)
+{
+	switch (od) {
+	case 1:
+		return 0;
+	case 2:
+		return 1;
+	case 4:
+		return 2;
+	case 8:
+		return 3;
+	}
+
+	/* Invalid */
+	return 0;
+}
+
+void meson_hdmi_pll_set(struct meson_drm *priv,
+			unsigned int base,
+			unsigned int od1,
+			unsigned int od2,
+			unsigned int od3)
+{
+	unsigned int val;
+
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
+		switch (base) {
+		case 2970000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x5800023d);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x00000000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55);
+
+			/* Enable and unreset */
+			regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
+						0x7 << 28, 0x4 << 28);
+
+			/* Poll for lock bit */
+			regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL,
+					val, (val & HDMI_PLL_LOCK), 10, 0);
+
+			/* div_frac */
+			regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
+						0xFFFF,  0x4e00);
+			break;
+
+		case 4320000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x5800025a);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x00000000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55);
+
+			/* unreset */
+			regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
+						BIT(28), 0);
+
+			/* Poll for lock bit */
+			regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL,
+					val, (val & HDMI_PLL_LOCK), 10, 0);
+			break;
+
+		case 5940000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x5800027b);
+			regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
+						0xFFFF,  0x4c00);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x135c5091);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55);
+
+			/* unreset */
+			regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
+						BIT(28), 0);
+
+			/* Poll for lock bit */
+			regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL,
+					val, (val & HDMI_PLL_LOCK), 10, 0);
+			break;
+		};
+	} else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
+		   meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) {
+		switch (base) {
+		case 2970000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x4000027b);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb300);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x860f30c4);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c8e0000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500);
+			break;
+
+		case 4320000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x400002b4);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x860f30c4);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c8e0000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500);
+			break;
+
+		case 5940000:
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x400002f7);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb200);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x860f30c4);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c8e0000);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729);
+			regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500);
+			break;
+
+		};
+
+		/* Reset PLL */
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
+					HDMI_PLL_RESET, HDMI_PLL_RESET);
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
+					HDMI_PLL_RESET, 0);
+
+		/* Poll for lock bit */
+		regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, val,
+				(val & HDMI_PLL_LOCK), 10, 0);
+	};
+
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
+				   3 << 16, pll_od_to_reg(od1) << 16);
+	else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
+		 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
+				   3 << 21, pll_od_to_reg(od1) << 21);
+
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
+				   3 << 22, pll_od_to_reg(od2) << 22);
+	else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
+		 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
+				   3 << 23, pll_od_to_reg(od2) << 23);
+
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
+				   3 << 18, pll_od_to_reg(od3) << 18);
+	else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
+		 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
+		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
+				   3 << 19, pll_od_to_reg(od3) << 19);
+}
+
 void meson_vclk_setup(struct meson_drm *priv, unsigned int target,
-		      unsigned int freq)
+		      unsigned int vclk_freq, unsigned int venc_freq,
+		      unsigned int dac_freq, bool hdmi_use_enci)
 {
-	if (target == MESON_VCLK_TARGET_CVBS && freq == MESON_VCLK_CVBS)
+	unsigned int freq;
+	unsigned int hdmi_tx_div;
+	unsigned int venc_div;
+
+	if (target == MESON_VCLK_TARGET_CVBS) {
 		meson_venci_cvbs_clock_config(priv);
+		return;
+	}
+
+	hdmi_tx_div = vclk_freq / dac_freq;
+
+	if (hdmi_tx_div == 0) {
+		pr_err("Fatal Error, invalid HDMI-TX freq %d\n",
+				dac_freq);
+		return;
+	}
+
+	venc_div = vclk_freq / venc_freq;
+
+	if (venc_div == 0) {
+		pr_err("Fatal Error, invalid HDMI venc freq %d\n",
+				venc_freq);
+		return;
+	}
+
+	switch (vclk_freq) {
+	case 54000:
+		if (hdmi_use_enci)
+			freq = MESON_VCLK_HDMI_ENCI_54000;
+		else
+			freq = MESON_VCLK_HDMI_DDR_54000;
+		break;
+	case 74250:
+		freq = MESON_VCLK_HDMI_74250;
+		break;
+	case 148500:
+		if (dac_freq != 148500)
+			freq = MESON_VCLK_HDMI_DDR_148500;
+		else
+			freq = MESON_VCLK_HDMI_148500;
+		break;
+	case 297000:
+		freq = MESON_VCLK_HDMI_297000;
+		break;
+	case 594000:
+		freq = MESON_VCLK_HDMI_594000;
+		break;
+	default:
+		pr_err("Fatal Error, invalid HDMI vclk freq %d\n",
+			vclk_freq);
+		return;
+	}
+
+	/* Set HDMI-TX sys clock */
+	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			   CTS_HDMI_SYS_SEL_MASK, 0);
+	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			   CTS_HDMI_SYS_DIV_MASK, 0);
+	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			   CTS_HDMI_SYS_EN, CTS_HDMI_SYS_EN);
+
+	/* Set HDMI PLL rate */
+	meson_hdmi_pll_set(priv, params[freq].pll_base_freq,
+			   params[freq].pll_od1,
+			   params[freq].pll_od2,
+			   params[freq].pll_od3);
+
+	/* Setup vid_pll divider */
+	meson_vid_pll_set(priv, params[freq].vid_pll_div);
+
+	/* Set VCLK div */
+	regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+			   VCLK_SEL_MASK, 0);
+	regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+			   VCLK_DIV_MASK, params[freq].vclk_div - 1);
+
+	/* Set HDMI-TX source */
+	switch (hdmi_tx_div) {
+	case 1:
+		/* enable vclk_div1 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV1_EN, VCLK_DIV1_EN);
+
+		/* select vclk_div1 for HDMI-TX */
+		regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+				   HDMI_TX_PIXEL_SEL_MASK, 0);
+		break;
+	case 2:
+		/* enable vclk_div2 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV2_EN, VCLK_DIV2_EN);
+
+		/* select vclk_div2 for HDMI-TX */
+		regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			HDMI_TX_PIXEL_SEL_MASK, 1 << HDMI_TX_PIXEL_SEL_SHIFT);
+		break;
+	case 4:
+		/* enable vclk_div4 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV4_EN, VCLK_DIV4_EN);
+
+		/* select vclk_div4 for HDMI-TX */
+		regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			HDMI_TX_PIXEL_SEL_MASK, 2 << HDMI_TX_PIXEL_SEL_SHIFT);
+		break;
+	case 6:
+		/* enable vclk_div6 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV6_EN, VCLK_DIV6_EN);
+
+		/* select vclk_div6 for HDMI-TX */
+		regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			HDMI_TX_PIXEL_SEL_MASK, 3 << HDMI_TX_PIXEL_SEL_SHIFT);
+		break;
+	case 12:
+		/* enable vclk_div12 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV12_EN, VCLK_DIV12_EN);
+
+		/* select vclk_div12 for HDMI-TX */
+		regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
+			HDMI_TX_PIXEL_SEL_MASK, 4 << HDMI_TX_PIXEL_SEL_SHIFT);
+		break;
+	}
+	regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
+				   HDMI_TX_PIXEL_EN, HDMI_TX_PIXEL_EN);
+
+	/* Set ENCI/ENCP Source */
+	switch (venc_div) {
+	case 1:
+		/* enable vclk_div1 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV1_EN, VCLK_DIV1_EN);
+
+		if (hdmi_use_enci)
+			/* select vclk_div1 for enci */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+					   CTS_ENCI_SEL_MASK, 0);
+		else
+			/* select vclk_div1 for encp */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+					   CTS_ENCP_SEL_MASK, 0);
+		break;
+	case 2:
+		/* enable vclk_div2 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV2_EN, VCLK_DIV2_EN);
+
+		if (hdmi_use_enci)
+			/* select vclk_div2 for enci */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCI_SEL_MASK, 1 << CTS_ENCI_SEL_SHIFT);
+		else
+			/* select vclk_div2 for encp */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCP_SEL_MASK, 1 << CTS_ENCP_SEL_SHIFT);
+		break;
+	case 4:
+		/* enable vclk_div4 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV4_EN, VCLK_DIV4_EN);
+
+		if (hdmi_use_enci)
+			/* select vclk_div4 for enci */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCI_SEL_MASK, 2 << CTS_ENCI_SEL_SHIFT);
+		else
+			/* select vclk_div4 for encp */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCP_SEL_MASK, 2 << CTS_ENCP_SEL_SHIFT);
+		break;
+	case 6:
+		/* enable vclk_div6 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV6_EN, VCLK_DIV6_EN);
+
+		if (hdmi_use_enci)
+			/* select vclk_div6 for enci */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCI_SEL_MASK, 3 << CTS_ENCI_SEL_SHIFT);
+		else
+			/* select vclk_div6 for encp */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCP_SEL_MASK, 3 << CTS_ENCP_SEL_SHIFT);
+		break;
+	case 12:
+		/* enable vclk_div12 gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
+				   VCLK_DIV12_EN, VCLK_DIV12_EN);
+
+		if (hdmi_use_enci)
+			/* select vclk_div12 for enci */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCI_SEL_MASK, 4 << CTS_ENCI_SEL_SHIFT);
+		else
+			/* select vclk_div12 for encp */
+			regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
+				CTS_ENCP_SEL_MASK, 4 << CTS_ENCP_SEL_SHIFT);
+		break;
+	}
+
+	if (hdmi_use_enci)
+		/* Enable ENCI clock gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
+				   CTS_ENCI_EN, CTS_ENCI_EN);
+	else
+		/* Enable ENCP clock gate */
+		regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
+				   CTS_ENCP_EN, CTS_ENCP_EN);
+
+	regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, VCLK_EN, VCLK_EN);
 }
+EXPORT_SYMBOL_GPL(meson_vclk_setup);

drivers/gpu/drm/meson/meson_vclk.h

@@ -23,12 +23,14 @@
 
 enum {
 	MESON_VCLK_TARGET_CVBS = 0,
+	MESON_VCLK_TARGET_HDMI = 1,
 };
 
 /* 27MHz is the CVBS Pixel Clock */
 #define MESON_VCLK_CVBS			27000
 
 void meson_vclk_setup(struct meson_drm *priv, unsigned int target,
-		      unsigned int freq);
+		      unsigned int vclk_freq, unsigned int venc_freq,
+		      unsigned int dac_freq, bool hdmi_use_enci);
 
 #endif /* __MESON_VCLK_H */

drivers/gpu/drm/meson/meson_venc_cvbs.c

@@ -32,6 +32,7 @@
 
 #include "meson_venc_cvbs.h"
 #include "meson_venc.h"
+#include "meson_vclk.h"
 #include "meson_registers.h"
 
 /* HHI VDAC Registers */
@@ -194,14 +195,20 @@ static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
 {
 	struct meson_venc_cvbs *meson_venc_cvbs =
 					encoder_to_meson_venc_cvbs(encoder);
+	struct meson_drm *priv = meson_venc_cvbs->priv;
 	int i;
 
 	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
 		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
 
 		if (drm_mode_equal(mode, &meson_mode->mode)) {
-			meson_venci_cvbs_mode_set(meson_venc_cvbs->priv,
+			meson_venci_cvbs_mode_set(priv,
 						  meson_mode->enci);
+
+			/* Setup 27MHz vclk2 for ENCI and VDAC */
+			meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
+					 MESON_VCLK_CVBS, MESON_VCLK_CVBS,
+					 MESON_VCLK_CVBS, true);
 			break;
 		}
 	}