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From: Kevin Brace <kevinbrace@gmx.com>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH v2 03/32] drm/via: Add via_crtc_hw.h
Date: Tue, 28 Jun 2022 16:52:17 -0500
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From: Kevin Brace <kevinbrace@bracecomputerlab.com>

Signed-off-by: Kevin Brace <kevinbrace@bracecomputerlab.com>
---
 drivers/gpu/drm/via/via_crtc_hw.h | 1048 +++++++++++++++++++++++++++++
 1 file changed, 1048 insertions(+)
 create mode 100644 drivers/gpu/drm/via/via_crtc_hw.h

--
2.35.1

diff --git a/drivers/gpu/drm/via/via_crtc_hw.h b/drivers/gpu/drm/via/via_crtc_hw.h
new file mode 100644
index 000000000000..9cce4fdcb33a
--- /dev/null
+++ b/drivers/gpu/drm/via/via_crtc_hw.h
@@ -0,0 +1,1048 @@
+/*
+ * Copyright 2012 James Simmons. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author(s):
+ * James Simmons <jsimmons@infradead.org>
+ */
+
+#ifndef __CRTC_HW_H__
+#define __CRTC_HW_H__
+
+#include <video/vga.h>
+
+#include <drm/drm_print.h>
+
+
+/* To be used with via_dac_set_dpms_control inline function. */
+#define VIA_DAC_DPMS_ON		0x00
+#define VIA_DAC_DPMS_STANDBY	0x01
+#define VIA_DAC_DPMS_SUSPEND	0x02
+#define VIA_DAC_DPMS_OFF	0x03
+
+
+struct vga_regset {
+	u16	ioport;
+	u8	io_addr;
+	u8	start_bit;
+	u8	end_bit;
+};
+
+struct vga_registers {
+	unsigned int count;
+	struct vga_regset *regs;
+};
+
+/************************************************
+ *****     Display Timing       *****
+ ************************************************/
+
+struct crtc_timings {
+	struct vga_registers htotal;
+	struct vga_registers hdisplay;
+	struct vga_registers hblank_start;
+	struct vga_registers hblank_end;
+	struct vga_registers hsync_start;
+	struct vga_registers hsync_end;
+	struct vga_registers vtotal;
+	struct vga_registers vdisplay;
+	struct vga_registers vblank_start;
+	struct vga_registers vblank_end;
+	struct vga_registers vsync_start;
+	struct vga_registers vsync_end;
+};
+
+/* Write a value to misc register with a mask */
+static inline void svga_wmisc_mask(void __iomem *regbase, u8 data, u8 mask)
+{
+	vga_w(regbase, VGA_MIS_W, (data & mask) | (vga_r(regbase, VGA_MIS_R) & ~mask));
+}
+
+/* Write a value to a sequence register with a mask */
+static inline void svga_wseq_mask(void __iomem *regbase, u8 index, u8 data, u8 mask)
+{
+	vga_wseq(regbase, index, (data & mask) | (vga_rseq(regbase, index) & ~mask));
+}
+
+/* Write a value to a CRT register with a mask */
+static inline void svga_wcrt_mask(void __iomem *regbase, u8 index, u8 data, u8 mask)
+{
+	vga_wcrt(regbase, index, (data & mask) | (vga_rcrt(regbase, index) & ~mask));
+}
+
+
+/***********************************************************************
+
+ VIA Technologies Chrome IGP Register Access Helper Functions
+
+***********************************************************************/
+
+static inline void
+via_iga1_set_palette_lut_resolution(void __iomem *regs,
+					bool palette_lut)
+{
+	/* Set the palette LUT resolution for IGA1. */
+	/* 3C5.15[7] - IGA1 6 / 8 Bit LUT
+	 *             0: 6-bit
+	 *             1: 8-bit */
+	svga_wseq_mask(regs, 0x15, palette_lut ? BIT(7) : 0x00, BIT(7));
+	DRM_DEBUG_KMS("IGA1 Palette LUT Resolution: %s bit\n",
+			palette_lut ? "8" : "6");
+}
+
+static inline void
+via_iga2_set_palette_lut_resolution(void __iomem *regs,
+					bool palette_lut)
+{
+	/* Set the palette LUT resolution for IGA2. */
+	/* 3X5.6A[5] - IGA2 6 / 8 Bit LUT
+	 *             0: 6-bit
+	 *             1: 8-bit */
+	svga_wcrt_mask(regs, 0x6a, palette_lut ? BIT(5) : 0x00, BIT(5));
+	DRM_DEBUG_KMS("IGA2 Palette LUT Resolution: %s bit\n",
+			palette_lut ? "8" : "6");
+}
+
+static inline void
+via_iga1_set_interlace_mode(void __iomem *regs, bool interlace_mode)
+{
+	svga_wcrt_mask(regs, 0x33,
+			interlace_mode ? BIT(6) : 0x00, BIT(6));
+	DRM_DEBUG_KMS("IGA1 Interlace Mode: %s\n",
+			interlace_mode ? "On" : "Off");
+}
+
+static inline void
+via_iga2_set_interlace_mode(void __iomem *regs, bool interlace_mode)
+{
+	svga_wcrt_mask(regs, 0x67,
+			interlace_mode ? BIT(5) : 0x00, BIT(5));
+	DRM_DEBUG_KMS("IGA2 Interlace Mode: %s\n",
+			interlace_mode ? "On" : "Off");
+}
+
+/*
+ * Sets IGA1's HSYNC Shift value.
+ */
+static inline void
+via_iga1_set_hsync_shift(void __iomem *regs, u8 shift_value)
+{
+	/* 3X5.33[2:0] - IGA1 HSYNC Shift */
+	svga_wcrt_mask(regs, 0x33, shift_value, BIT(2) | BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("IGA1 HSYNC Shift: %u\n",
+				(shift_value & 0x07));
+}
+
+/*
+ * Sets DVP0 (Digital Video Port 0) I/O pad state.
+ */
+static inline void
+via_dvp0_set_io_pad_state(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.1E[7:6] - DVP0 Power Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x1E, io_pad_state << 6, BIT(7) | BIT(6));
+	DRM_DEBUG_KMS("DVP0 I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ? "On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ? "Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ? "Off" :
+								       "Off");
+}
+
+/*
+ * Sets DVP0 (Digital Video Port 0) clock I/O pad drive strength.
+ */
+static inline void
+via_dvp0_set_clock_drive_strength(void __iomem *regs,
+					u8 clock_drive_strength)
+{
+	/* 3C5.1E[2] - DVP0 Clock Drive Strength Bit [0] */
+	svga_wseq_mask(regs, 0x1E,
+			clock_drive_strength << 2, BIT(2));
+
+	/* 3C5.2A[4] - DVP0 Clock Drive Strength Bit [1] */
+	svga_wseq_mask(regs, 0x2A,
+			clock_drive_strength << 3, BIT(4));
+
+	DRM_DEBUG_KMS("DVP0 Clock I/O Pad Drive Strength: %lu\n",
+			clock_drive_strength & (BIT(1) | BIT(0)));
+}
+
+/*
+ * Sets DVP0 (Digital Video Port 0) data I/O pads drive strength.
+ */
+static inline void
+via_dvp0_set_data_drive_strength(void __iomem *regs,
+					u8 data_drive_strength)
+{
+	/* 3C5.1B[1] - DVP0 Data Drive Strength Bit [0] */
+	svga_wseq_mask(regs, 0x1B,
+			data_drive_strength << 1, BIT(1));
+
+	/* 3C5.2A[5] - DVP0 Data Drive Strength Bit [1] */
+	svga_wseq_mask(regs, 0x2A,
+			data_drive_strength << 4, BIT(5));
+
+	DRM_DEBUG_KMS("DVP0 Data I/O Pads Drive Strength: %lu\n",
+			data_drive_strength & (BIT(1) | BIT(0)));
+}
+
+/*
+ * Sets the display source of DVP0 (Digital Video Port 0) interface.
+ */
+static inline void
+via_dvp0_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.96[4] - DVP0 Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x96, display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("DVP0 Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets DVP1 (Digital Video Port 1) I/O pad state.
+ */
+static inline void
+via_dvp1_set_io_pad_state(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.1E[5:4] - DVP1 Power Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x1E, io_pad_state << 4, BIT(5) | BIT(4));
+	DRM_DEBUG_KMS("DVP1 I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ? "On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ? "Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ? "Off" :
+								       "Off");
+}
+
+/*
+ * Sets DVP1 (Digital Video Port 1) clock I/O pad drive strength.
+ */
+static inline void
+via_dvp1_set_clock_drive_strength(void __iomem *regs,
+					u8 clock_drive_strength)
+{
+	/* 3C5.65[3:2] - DVP1 Clock Pads Driving Select [1:0]
+	 *               00: lowest
+	 *               01: low
+	 *               10: high
+	 *               11: highest */
+	svga_wseq_mask(regs, 0x65,
+			clock_drive_strength << 2, BIT(3) | BIT(2));
+	DRM_DEBUG_KMS("DVP1 Clock I/O Pad Drive Strength: %lu\n",
+			clock_drive_strength & (BIT(1) | BIT(0)));
+}
+
+/*
+ * Sets DVP1 (Digital Video Port 1) data I/O pads drive strength.
+ */
+static inline void
+via_dvp1_set_data_drive_strength(void __iomem *regs,
+					u8 data_drive_strength)
+{
+	/* 3C5.65[1:0] - DVP1 Data Pads Driving Select [1:0}
+	 *               00: lowest
+	 *               01: low
+	 *               10: high
+	 *               11: highest */
+	svga_wseq_mask(regs, 0x65,
+			data_drive_strength, BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("DVP1 Data I/O Pads Drive Strength: %lu\n",
+			data_drive_strength & (BIT(1) | BIT(0)));
+}
+
+/*
+ * Sets the display source of DVP1 (Digital Video Port 1) interface.
+ */
+static inline void
+via_dvp1_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.9B[4] - DVP1 Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x9B, display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("DVP1 Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets analog (VGA) DAC power.
+ */
+static inline void via_dac_set_power(void __iomem *regs, bool output_state)
+{
+	/* 3X5.47[2] - DACOFF Backdoor Register
+	 *             0: DAC on
+	 *             1: DAC off */
+	svga_wcrt_mask(regs, 0x47,
+			output_state ? 0x00 : BIT(2), BIT(2));
+	DRM_DEBUG_KMS("Analog (VGA) Power: %s\n",
+			output_state ? "On" : "Off");
+}
+
+/*
+ * Sets analog (VGA) DPMS state.
+ */
+static inline void via_dac_set_dpms_control(void __iomem *regs,
+						u8 dpms_control)
+{
+	/* 3X5.36[5:4] - DPMS Control
+	 *               00: On
+	 *               01: Stand-by
+	 *               10: Suspend
+	 *               11: Off */
+	svga_wcrt_mask(regs, 0x36,
+			dpms_control << 4, BIT(5) | BIT(4));
+	DRM_DEBUG_KMS("Analog (VGA) DPMS: %s\n",
+			((dpms_control & (BIT(1) | BIT(0))) == 0x03) ?
+				"Off" :
+			((dpms_control & (BIT(1) | BIT(0))) == 0x02) ?
+				"Suspend" :
+			((dpms_control & (BIT(1) | BIT(0))) == 0x01) ?
+				"Standby" :
+				"On");
+}
+
+/*
+ * Sets analog (VGA) sync polarity.
+ */
+static inline void via_dac_set_sync_polarity(void __iomem *regs,
+						u8 sync_polarity)
+{
+	/* 3C2[7] - Analog Vertical Sync Polarity
+	 *          0: Positive
+	 *          1: Negative
+	 * 3C2[6] - Analog Horizontal Sync Polarity
+	 *          0: Positive
+	 *          1: Negative */
+	svga_wmisc_mask(regs,
+			sync_polarity << 6, (BIT(1) | BIT(0)) << 6);
+	DRM_DEBUG_KMS("Analog (VGA) Horizontal Sync Polarity: %s\n",
+			(sync_polarity & BIT(0)) ? "-" : "+");
+	DRM_DEBUG_KMS("Analog (VGA) Vertical Sync Polarity: %s\n",
+			(sync_polarity & BIT(1)) ? "-" : "+");
+}
+
+/*
+ * Sets analog (VGA) display source.
+ */
+static inline void via_dac_set_display_source(void __iomem *regs,
+						u8 display_source)
+{
+	/* 3C5.16[6] - CRT Display Source
+	 *             0: Primary Display Stream (IGA1)
+	 *             1: Secondary Display Stream (IGA2) */
+	svga_wseq_mask(regs, 0x16,
+			display_source << 6, BIT(6));
+	DRM_DEBUG_KMS("Analog (VGA) Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary power sequence control
+ * type.
+ */
+static inline void via_lvds_set_primary_power_seq_type(void __iomem *regs,
+							bool ctrl_type)
+{
+	/* 3X5.91[0] - FP Primary Power Sequence Control Type
+	 *             0: Hardware Control
+	 *             1: Software Control */
+	svga_wcrt_mask(regs, 0x91,
+			ctrl_type ? 0x00 : BIT(0), BIT(0));
+	DRM_DEBUG_KMS("FP Primary Power Sequence Control Type: "
+			"%s Control\n",
+			ctrl_type ? "Hardware" : "Software");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary software controlled
+ * back light.
+ */
+static inline void via_lvds_set_primary_soft_back_light(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.91[1] - FP Primary Software Back Light On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91,
+			soft_on ? BIT(1) : 0x00, BIT(1));
+	DRM_DEBUG_KMS("FP Primary Software Controlled Back Light: "
+			"%s\n", soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary software controlled
+ * VEE.
+ */
+static inline void via_lvds_set_primary_soft_vee(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.91[2] - FP Primary Software VEE On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91,
+			soft_on ? BIT(2) : 0x00, BIT(2));
+	DRM_DEBUG_KMS("FP Primary Software Controlled VEE: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary software controlled
+ * data.
+ */
+static inline void via_lvds_set_primary_soft_data(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.91[3] - FP Primary Software Data On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91,
+			soft_on ? BIT(3) : 0x00, BIT(3));
+	DRM_DEBUG_KMS("FP Primary Software Controlled Data: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary software controlled
+ * VDD.
+ */
+static inline void via_lvds_set_primary_soft_vdd(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.91[4] - FP Primary Software VDD On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91,
+			soft_on ? BIT(4) : 0x00, BIT(4));
+	DRM_DEBUG_KMS("FP Primary Software Controlled VDD: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary direct back
+ * light control.
+ */
+static inline void via_lvds_set_primary_direct_back_light_ctrl(
+					void __iomem *regs, bool direct_on)
+{
+	/* 3X5.91[6] - FP Primary Direct Back Light Control
+	 *             0: On
+	 *             1: Off */
+	svga_wcrt_mask(regs, 0x91,
+			direct_on ? 0x00 : BIT(6), BIT(6));
+	DRM_DEBUG_KMS("FP Primary Direct Back Light Control: %s\n",
+			direct_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary direct display
+ * period control.
+ */
+static inline void via_lvds_set_primary_direct_display_period(
+					void __iomem *regs, bool direct_on)
+{
+	/* 3X5.91[7] - FP Primary Direct Display Period Control
+	 *             0: On
+	 *             1: Off */
+	svga_wcrt_mask(regs, 0x91,
+			direct_on ? 0x00 : BIT(7), BIT(7));
+	DRM_DEBUG_KMS("FP Primary Direct Display Period Control: %s\n",
+			direct_on ? "On" : "Off");
+}
+
+/*
+ * Sets KM400 or later chipset's FP primary hardware controlled
+ * power sequence.
+ */
+static inline void via_lvds_set_primary_hard_power(void __iomem *regs,
+							bool power_state)
+{
+	/* 3X5.6A[3] - FP Primary Hardware Controlled Power Sequence
+	 *             0: Hardware Controlled Power Off
+	 *             1: Hardware Controlled Power On */
+	svga_wcrt_mask(regs, 0x6A,
+			power_state ? BIT(3) : 0x00, BIT(3));
+	DRM_DEBUG_KMS("FP Primary Hardware Controlled Power "
+			"Sequence: %s\n", power_state ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary
+ * power sequence control type.
+ */
+static inline void via_lvds_set_secondary_power_seq_type(void __iomem *regs,
+							bool ctrl_type)
+{
+	/* 3X5.D3[0] - FP Secondary Power Sequence Control Type
+	 *             0: Hardware Control
+	 *             1: Software Control */
+	svga_wcrt_mask(regs, 0xD3,
+			ctrl_type ? 0x00 : BIT(0), BIT(0));
+	DRM_DEBUG_KMS("FP Secondary Power Sequence Control Type: "
+			"%s Control\n",
+			ctrl_type ? "Hardware" : "Software");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary
+ * software controlled back light.
+ */
+static inline void via_lvds_set_secondary_soft_back_light(void __iomem *regs,
+								bool soft_on)
+{
+	/* 3X5.D3[1] - FP Secondary Software Back Light On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0xD3,
+			soft_on ? BIT(1) : 0x00, BIT(1));
+	DRM_DEBUG_KMS("FP Secondary Software Controlled Back Light: "
+			"%s\n", soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary software
+ * controlled VEE.
+ */
+static inline void via_lvds_set_secondary_soft_vee(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.D3[2] - FP Secondary Software VEE On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0xD3,
+			soft_on ? BIT(2) : 0x00, BIT(2));
+	DRM_DEBUG_KMS("FP Secondary Software Controlled VEE: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary software
+ * controlled data.
+ */
+static inline void via_lvds_set_secondary_soft_data(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.D3[3] - FP Secondary Software Data On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0xD3,
+			soft_on ? BIT(3) : 0x00, BIT(3));
+	DRM_DEBUG_KMS("FP Secondary Software Controlled Data: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary software
+ * controlled VDD.
+ */
+static inline void via_lvds_set_secondary_soft_vdd(void __iomem *regs,
+							bool soft_on)
+{
+	/* 3X5.D3[4] - FP Secondary Software VDD On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0xD3,
+			soft_on ? BIT(4) : 0x00, BIT(4));
+	DRM_DEBUG_KMS("FP Secondary Software Controlled VDD: %s\n",
+			soft_on ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary direct back
+ * light control.
+ */
+static inline void via_lvds_set_secondary_direct_back_light_ctrl(
+					void __iomem *regs, bool direct_on)
+{
+	/* 3X5.D3[6] - FP Secondary Direct Back Light Control
+	 *             0: On
+	 *             1: Off */
+	svga_wcrt_mask(regs, 0xD3,
+			direct_on ? 0x00 : BIT(6), BIT(6));
+	DRM_DEBUG_KMS("FP Secondary Direct Back Light "
+			"Control: %s\n", direct_on ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's FP secondary direct
+ * display period control.
+ */
+static inline void via_lvds_set_secondary_direct_display_period(
+					void __iomem *regs, bool direct_on)
+{
+	/* 3X5.D3[7] - FP Secondary Direct Display Period Control
+	 *             0: On
+	 *             1: Off */
+	svga_wcrt_mask(regs, 0xD3,
+			direct_on ? 0x00 : BIT(7), BIT(7));
+	DRM_DEBUG_KMS("FP Secondary Direct Display Period "
+			"Control: %s\n", direct_on ? "On" : "Off");
+}
+
+/*
+ * Sets FP secondary hardware controlled power sequence enable.
+ */
+static inline void via_lvds_set_secondary_hard_power(void __iomem *regs,
+							bool power_state)
+{
+	/* 3X5.D4[1] - Secondary Power Hardware Power Sequence Enable
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0xD4,
+			power_state ? BIT(1) : 0x00, BIT(1));
+	DRM_DEBUG_KMS("FP Secondary Hardware Controlled Power "
+			"Sequence: %s\n", power_state ? "On" : "Off");
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) Low I/O pad state.
+ */
+static inline void
+via_fpdp_low_set_io_pad_state(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.2A[1:0] - FPDP Low I/O Pad Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x2A,
+			io_pad_state, BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("FPDP Low I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ?
+				"On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ?
+				"Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ?
+				"Off" :
+				"Off");
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) Low adjustment register.
+ */
+static inline void
+via_fpdp_low_set_adjustment(void __iomem *regs, u8 adjustment)
+{
+	/* 3X5.99[3:0] - FPDP Low Adjustment */
+	svga_wcrt_mask(regs, 0x99,
+			adjustment, BIT(3) | BIT(2) | BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("FPDP Low Adjustment: %lu\n",
+			(adjustment & (BIT(3) | BIT(2) |
+					BIT(1) | BIT(0))));
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) Low interface display source.
+ */
+static inline void
+via_fpdp_low_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.99[4] - FPDP Low Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x99,
+			display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("FPDP Low Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) High I/O pad state.
+ */
+static inline void
+via_fpdp_high_set_io_pad_state(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.2A[3:2] - FPDP High I/O Pad Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x2A,
+			io_pad_state << 2, BIT(3) | BIT(2));
+	DRM_DEBUG_KMS("FPDP High I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ?
+				"On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ?
+				"Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ?
+				"Off" :
+				"Off");
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) High adjustment register.
+ */
+static inline void
+via_fpdp_high_set_adjustment(void __iomem *regs, u8 adjustment)
+{
+	/* 3X5.97[3:0] - FPDP High Adjustment */
+	svga_wcrt_mask(regs, 0x97,
+			adjustment, BIT(3) | BIT(2) | BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("FPDP High Adjustment: %lu\n",
+			(adjustment & (BIT(3) | BIT(2) |
+					BIT(1) | BIT(0))));
+}
+
+/*
+ * Sets FPDP (Flat Panel Display Port) High interface display source.
+ */
+static inline void
+via_fpdp_high_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.97[4] - FPDP High Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x97,
+			display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("FPDP High Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets CX700 / VX700 or later chipset's LVDS1 power state.
+ */
+static inline void
+via_lvds1_set_power(void __iomem *regs, bool power_state)
+{
+	/* 3X5.D2[7] - Power Down (Active High) for Channel 1 LVDS
+	 *             0: Power on
+	 *             1: Power off */
+	svga_wcrt_mask(regs, 0xD2,
+			power_state ? 0x00 : BIT(7), BIT(7));
+	DRM_DEBUG_KMS("LVDS1 Power State: %s\n",
+			power_state ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 or later single chipset's LVDS1 power sequence type.
+ */
+static inline void
+via_lvds1_set_power_seq(void __iomem *regs, bool softCtrl)
+{
+	/* Set LVDS1 power sequence type. */
+	/* 3X5.91[0] - LVDS1 Hardware or Software Control Power Sequence
+	 *             0: Hardware Control
+	 *             1: Software Control */
+	svga_wcrt_mask(regs, 0x91, softCtrl ? BIT(0) : 0, BIT(0));
+	DRM_DEBUG_KMS("LVDS1 Power Sequence: %s Control\n",
+			softCtrl ? "Software" : "Hardware");
+}
+
+/*
+ * Sets CX700 or later single chipset's LVDS1 software controlled
+ * data path state.
+ */
+static inline void
+via_lvds1_set_soft_data(void __iomem *regs, bool softOn)
+{
+	/* Set LVDS1 software controlled data path state. */
+	/* 3X5.91[3] - Software Data On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91, softOn ? BIT(3) : 0, BIT(3));
+	DRM_DEBUG_KMS("LVDS1 Software Controlled Data Path: %s\n",
+			softOn ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 or later single chipset's LVDS1 software controlled Vdd.
+ */
+static inline void
+via_lvds1_set_soft_vdd(void __iomem *regs, bool softOn)
+{
+	/* Set LVDS1 software controlled Vdd. */
+	/* 3X5.91[4] - Software VDD On
+	 *             0: Off
+	 *             1: On */
+	svga_wcrt_mask(regs, 0x91, softOn ? BIT(4) : 0, BIT(4));
+	DRM_DEBUG_KMS("LVDS1 Software Controlled Vdd: %s\n",
+			softOn ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 or later single chipset's LVDS1 software controlled
+ * display period.
+ */
+static inline void
+via_lvds1_set_soft_display_period(void __iomem *regs, bool softOn)
+{
+	/* Set LVDS1 software controlled display period state. */
+	/* 3X5.91[7] - Software Direct On / Off Display Period
+	 *             in the Panel Path
+	 *             0: On
+	 *             1: Off */
+	svga_wcrt_mask(regs, 0x91, softOn ? 0 : BIT(7), BIT(7));
+	DRM_DEBUG_KMS("LVDS1 Software Controlled Display Period: %s\n",
+			softOn ? "On" : "Off");
+}
+
+/*
+ * Sets LVDS1 I/O pad state.
+ */
+static inline void
+via_lvds1_set_io_pad_setting(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.2A[1:0] - LVDS1 I/O Pad Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x2A,
+			io_pad_state, BIT(1) | BIT(0));
+	DRM_DEBUG_KMS("LVDS1 I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ?
+				"On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ?
+				"Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ?
+				"Off" :
+				"Off");
+}
+
+/*
+ * Sets LVDS1 format.
+ */
+static inline void
+via_lvds1_set_format(void __iomem *regs, u8 format)
+{
+	/* 3X5.D2[1] - LVDS Channel 1 Format Selection
+	 *             0: SPWG Mode
+	 *             1: OPENLDI Mode */
+	svga_wcrt_mask(regs, 0xd2,
+			format << 1, BIT(1));
+	DRM_DEBUG_KMS("LVDS1 Format: %s\n",
+			(format & BIT(0)) ? "OPENLDI" : "SPWG");
+}
+
+/*
+ * Sets LVDS1 output format (rotation or sequential mode).
+ */
+static inline void
+via_lvds1_set_output_format(void __iomem *regs, u8 output_format)
+{
+	/* 3X5.88[6] - LVDS Channel 1 Output Format
+	 *             0: Rotation
+	 *             1: Sequential */
+	svga_wcrt_mask(regs, 0x88,
+			output_format << 6, BIT(6));
+	DRM_DEBUG_KMS("LVDS1 Output Format: %s\n",
+			(output_format & BIT(0)) ?
+			"Sequential" : "Rotation");
+}
+
+/*
+ * Sets LVDS1 output color dithering (18-bit color display vs.
+ * 24-bit color display).
+ */
+static inline void
+via_lvds1_set_dithering(void __iomem *regs, bool dithering)
+{
+	/* 3X5.88[0] - LVDS Channel 1 Output Bits
+	 *             0: 24 bits (dithering off)
+	 *             1: 18 bits (dithering on) */
+	svga_wcrt_mask(regs, 0x88,
+			dithering ? BIT(0) : 0x00, BIT(0));
+	DRM_DEBUG_KMS("LVDS1 Color Dithering: %s\n",
+			dithering ?
+			"On (18 bit color)" : "Off (24 bit color)");
+}
+
+/*
+ * Sets LVDS1 display source.
+ */
+static inline void
+via_lvds1_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.99[4] - LVDS Channel 1 Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x99,
+			display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("LVDS1 Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets CX700 / VX700 and VX800 chipset's LVDS2 power state.
+ */
+static inline void
+via_lvds2_set_power(void __iomem *regs, bool power_state)
+{
+	/* 3X5.D2[6] - Power Down (Active High) for Channel 2 LVDS
+	 *             0: Power on
+	 *             1: Power off */
+	svga_wcrt_mask(regs, 0xD2,
+			power_state ? 0x00 : BIT(6), BIT(6));
+	DRM_DEBUG_KMS("LVDS2 Power State: %s\n",
+			power_state ? "On" : "Off");
+}
+
+/*
+ * Sets LVDS2 I/O pad state.
+ */
+static inline void
+via_lvds2_set_io_pad_setting(void __iomem *regs, u8 io_pad_state)
+{
+	/* 3C5.2A[3:2] - LVDS2 I/O Pad Control
+	 *               0x: Pad always off
+	 *               10: Depend on the other control signal
+	 *               11: Pad on/off according to the
+	 *                   Power Management Status (PMS) */
+	svga_wseq_mask(regs, 0x2A,
+			io_pad_state << 2, BIT(3) | BIT(2));
+	DRM_DEBUG_KMS("LVDS2 I/O Pad State: %s\n",
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x03) ?
+				"On" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x02) ?
+				"Conditional" :
+			((io_pad_state & (BIT(1) | BIT(0))) == 0x01) ?
+				"Off" :
+				"Off");
+}
+
+/*
+ * Sets LVDS2 format.
+ */
+static inline void
+via_lvds2_set_format(void __iomem *regs, u8 format)
+{
+	/* 3X5.D2[0] - LVDS Channel 2 Format Selection
+	 *             0: SPWG Mode
+	 *             1: OPENLDI Mode */
+	svga_wcrt_mask(regs, 0xd2, format, BIT(0));
+	DRM_DEBUG_KMS("LVDS2 Format: %s\n",
+			(format & BIT(0)) ? "OPENLDI" : "SPWG");
+}
+
+/*
+ * Sets LVDS2 output format (rotation or sequential mode).
+ */
+static inline void
+via_lvds2_set_output_format(void __iomem *regs, u8 output_format)
+{
+	/* 3X5.D4[7] - LVDS Channel 2 Output Format
+	 *             0: Rotation
+	 *             1: Sequential */
+	svga_wcrt_mask(regs, 0xd4, output_format << 7, BIT(7));
+	DRM_DEBUG_KMS("LVDS2 Output Format: %s\n",
+			(output_format & BIT(0)) ?
+			"Sequential" : "Rotation");
+}
+
+/*
+ * Sets LVDS2 output color dithering (18-bit color display vs.
+ * 24-bit color display).
+ */
+static inline void
+via_lvds2_set_dithering(void __iomem *regs, bool dithering)
+{
+	/* 3X5.D4[6] - LVDS Channel 2 Output Bits
+	 *             0: 24 bits (dithering off)
+	 *             1: 18 bits (dithering on) */
+	svga_wcrt_mask(regs, 0xd4,
+			dithering ? BIT(6) : 0x00, BIT(6));
+	DRM_DEBUG_KMS("LVDS2 Color Dithering: %s\n",
+			dithering ?
+			"On (18 bit color)" : "Off (24 bit color)");
+}
+
+/*
+ * Sets LVDS2 display source.
+ */
+static inline void
+via_lvds2_set_display_source(void __iomem *regs, u8 display_source)
+{
+	/* 3X5.97[4] - LVDS Channel 2 Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x97,
+			display_source << 4, BIT(4));
+	DRM_DEBUG_KMS("LVDS2 Display Source: IGA%d\n",
+			(display_source & 0x01) + 1);
+}
+
+/*
+ * Sets CX700 / VX700 and VX800 chipsets' TMDS (DVI) power state.
+ */
+static inline void
+via_tmds_set_power(void __iomem *regs, bool powerState)
+{
+	/* 3X5.D2[3] - Power Down (Active High) for DVI
+	 *             0: TMDS power on
+	 *             1: TMDS power down */
+	svga_wcrt_mask(regs, 0xD2,
+			powerState ? 0x00 : BIT(3), BIT(3));
+	DRM_DEBUG_KMS("TMDS (DVI) Power State: %s\n",
+			powerState ? "On" : "Off");
+}
+
+/*
+ * Sets CX700 / VX700 and VX800 chipsets' TMDS (DVI) sync polarity.
+ */
+static inline void
+via_tmds_set_sync_polarity(void __iomem *regs, u8 syncPolarity)
+{
+	/* Set TMDS (DVI) sync polarity. */
+	/* 3X5.97[6] - DVI (TMDS) VSYNC Polarity
+	 *              0: Positive
+	 *              1: Negative
+	 * 3X5.97[5] - DVI (TMDS) HSYNC Polarity
+	 *              0: Positive
+	 *              1: Negative */
+	svga_wcrt_mask(regs, 0x97,
+			syncPolarity << 5, BIT(6) | BIT(5));
+	DRM_DEBUG_KMS("TMDS (DVI) Horizontal Sync Polarity: %s\n",
+			(syncPolarity & BIT(0)) ? "-" : "+");
+	DRM_DEBUG_KMS("TMDS (DVI) Vertical Sync Polarity: %s\n",
+			(syncPolarity & BIT(1)) ? "-" : "+");
+}
+
+/*
+ * Sets TMDS (DVI) display source.
+ */
+static inline void
+via_tmds_set_display_source(void __iomem *regs, u8 displaySource)
+{
+	/* The integrated TMDS transmitter appears to utilize LVDS1's
+	 * data source selection bit (3X5.99[4]). */
+	/* 3X5.99[4] - LVDS Channel1 Data Source Selection
+	 *             0: Primary Display
+	 *             1: Secondary Display */
+	svga_wcrt_mask(regs, 0x99,
+			displaySource << 4, BIT(4));
+	DRM_DEBUG_KMS("TMDS (DVI) Display Source: IGA%d\n",
+			(displaySource & 0x01) + 1);
+}
+
+
+void load_register_tables(void __iomem *regbase, struct vga_registers *regs);
+void load_value_to_registers(void __iomem *regbase, struct vga_registers *regs,
+					unsigned int value);
+
+#endif /* __CRTC_HW_H__ */