cb3745c407
Add backlight support in ps8640 through the AUX channel using eDP DPCD registers. BUG=b:202966352 BRANCH=trogdor TEST=verified firmware screen works on homestar rev4 Change-Id: Ief1bf56c89c8215427dcbddfc67e8bcd4c3607d2 Signed-off-by: xuxinxiong <xuxinxiong@huaqin.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/58624 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <edid.h>
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#include <types.h>
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#ifndef _PS8640_H_
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#define _PS8640_H_
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enum {
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PAGE2_GPIO_L = 0xa6,
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PAGE2_GPIO_H = 0xa7,
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PAGE2_I2C_BYPASS = 0xea,
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PS_GPIO9 = BIT(1),
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I2C_BYPASS_EN = BIT(7),
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PAGE2_MCS_EN = 0xf3,
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MCS_EN_SHIFT = 0,
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MCS_EN_MASK = 0x1,
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PAGE3_SET_ADD = 0xfe,
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PAGE3_SET_VAL = 0xff,
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VDO_CTL_ADD = 0x13,
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VDO_DIS = 0x18,
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VDO_EN = 0x1c,
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};
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enum {
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PAGE0_AUXCH_CFG3 = 0x76,
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AUXCH_CFG3_RESET = 0xff,
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PAGE0_SWAUX_ADDR_7_0 = 0x7d,
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PAGE0_SWAUX_ADDR_15_8 = 0x7e,
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PAGE0_SWAUX_ADDR_23_16 = 0x7f,
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SWAUX_ADDR_MASK = 0xfffff,
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PAGE0_SWAUX_LENGTH = 0x80,
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SWAUX_LENGTH_MASK = 0xf,
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SWAUX_NO_PAYLOAD = BIT(7),
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PAGE0_SWAUX_WDATA = 0x81,
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PAGE0_SWAUX_RDATA = 0x82,
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PAGE0_SWAUX_CTRL = 0x83,
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SWAUX_SEND = BIT(0),
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PAGE0_SWAUX_STATUS = 0x84,
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SWAUX_M_MASK = 0x1f,
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SWAUX_STATUS_MASK = (0x7 << 5),
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SWAUX_STATUS_NACK = (0x1 << 5),
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SWAUX_STATUS_DEFER = (0x2 << 5),
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SWAUX_STATUS_ACKM = (0x3 << 5),
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SWAUX_STATUS_INVALID = (0x4 << 5),
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SWAUX_STATUS_I2C_NACK = (0x5 << 5),
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SWAUX_STATUS_I2C_DEFER = (0x6 << 5),
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SWAUX_STATUS_TIMEOUT = (0x7 << 5),
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};
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int ps8640_init(uint8_t bus, uint8_t chip);
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int ps8640_get_edid(uint8_t bus, uint8_t chip, struct edid *out);
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void ps8640_backlight_enable(uint8_t bus, uint8_t chip);
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#endif
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