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drm/bridge: analogix_dp: Set PD_INC_BG first when powering up edp phy

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Following the correct power up sequence:
dp_pd=ff => dp_pd=7f => wait 10us => dp_pd=00

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423105003.9004-7-enric.balletbo@collabora.com
This commit is contained in:
zain wang 2018-04-23 12:49:42 +02:00 committed by Andrzej Hajda
parent 7f6414143a
commit d79acb5932
2 changed files with 11 additions and 2 deletions
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10
drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
View file

@ -321,10 +321,16 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
break;
case POWER_ALL:
if (enable) {
reg = DP_PHY_PD | AUX_PD | CH3_PD | CH2_PD |
CH1_PD | CH0_PD;
reg = DP_ALL_PD;
writel(reg, dp->reg_base + phy_pd_addr);
} else {
reg = DP_ALL_PD;
writel(reg, dp->reg_base + phy_pd_addr);
usleep_range(10, 15);
reg &= ~DP_INC_BG;
writel(reg, dp->reg_base + phy_pd_addr);
usleep_range(10, 15);
writel(0x00, dp->reg_base + phy_pd_addr);
}
break;

3
drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
View file

@ -342,12 +342,15 @@
#define DP_PLL_REF_BIT_1_2500V (0x7 << 0)
/* ANALOGIX_DP_PHY_PD */
#define DP_INC_BG (0x1 << 7)
#define DP_EXP_BG (0x1 << 6)
#define DP_PHY_PD (0x1 << 5)
#define AUX_PD (0x1 << 4)
#define CH3_PD (0x1 << 3)
#define CH2_PD (0x1 << 2)
#define CH1_PD (0x1 << 1)
#define CH0_PD (0x1 << 0)
#define DP_ALL_PD (0xff)
/* ANALOGIX_DP_PHY_TEST */
#define MACRO_RST (0x1 << 5)