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video/drm: mipi-dphy: optimized power on/off sequences 

we can power off da_pwrok and bandgap to reduce power consumption.

Change-Id: I0fa42d6d29ebd6f9347c9c4e868495df2bc07e05
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
This commit is contained in:
Wyon Bi 2018-03-05 15:13:39 +08:00 committed by Kever Yang
parent 693b63de6e
commit cac6ce1777
1 changed files with 30 additions and 0 deletions
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30
drivers/video/drm/rockchip-inno-mipi-dphy.c
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@ -21,6 +21,7 @@
/* Innosilicon MIPI D-PHY registers */
#define INNO_PHY_LANE_CTRL 0x00000
#define MIPI_BGPD BIT(7)
#define CLK_LANE_EN_MASK BIT(6)
#define DATA_LANE_3_EN_MASK BIT(5)
#define DATA_LANE_2_EN_MASK BIT(4)
@ -31,6 +32,8 @@
#define DATA_LANE_2_EN BIT(4)
#define DATA_LANE_1_EN BIT(3)
#define DATA_LANE_0_EN BIT(2)
#define PWROK_BP BIT(1)
#define PWROK BIT(0)
#define INNO_PHY_POWER_CTRL 0x00004
#define ANALOG_RESET_MASK BIT(2)
#define ANALOG_RESET BIT(2)
@ -53,6 +56,8 @@
#define DIGITAL_RESET_MASK BIT(0)
#define DIGITAL_NORMAL BIT(0)
#define DIGITAL_RESET 0
#define INNO_PHY_LVDS_CTRL 0x003ac
#define LVDS_BGPD BIT(0)
#define INNO_CLOCK_LANE_REG_BASE 0x00100
#define INNO_DATA_LANE_0_REG_BASE 0x00180
@ -462,11 +467,34 @@ static inline void inno_mipi_dphy_pll_ldo_enable(struct inno_mipi_dphy *inno)
PLL_POWER_ON | LDO_POWER_ON);
}
static inline void inno_mipi_dphy_da_pwrok_enable(struct inno_mipi_dphy *inno)
{
inno_update_bits(inno, INNO_PHY_LANE_CTRL, PWROK_BP | PWROK, PWROK);
}
static inline void inno_mipi_dphy_da_pwrok_disable(struct inno_mipi_dphy *inno)
{
inno_update_bits(inno, INNO_PHY_LANE_CTRL, PWROK_BP | PWROK, PWROK_BP);
}
static inline void inno_mipi_dphy_bgpd_enable(struct inno_mipi_dphy *inno)
{
inno_update_bits(inno, INNO_PHY_LANE_CTRL, MIPI_BGPD, 0);
}
static inline void inno_mipi_dphy_bgpd_disable(struct inno_mipi_dphy *inno)
{
inno_update_bits(inno, INNO_PHY_LANE_CTRL, MIPI_BGPD, MIPI_BGPD);
inno_update_bits(inno, INNO_PHY_LVDS_CTRL, LVDS_BGPD, LVDS_BGPD);
}
static int inno_mipi_dphy_power_on(struct display_state *state)
{
struct connector_state *conn_state = &state->conn_state;
struct inno_mipi_dphy *inno = conn_state->phy_private;
inno_mipi_dphy_bgpd_enable(inno);
inno_mipi_dphy_da_pwrok_enable(inno);
inno_mipi_dphy_pll_ldo_enable(inno);
inno_mipi_dphy_lane_enable(inno);
inno_mipi_dphy_reset(inno);
@ -488,6 +516,8 @@ static int inno_mipi_dphy_power_off(struct display_state *state)
inno_mipi_dphy_lane_disable(inno);
inno_mipi_dphy_pll_ldo_disable(inno);
inno_mipi_dphy_da_pwrok_disable(inno);
inno_mipi_dphy_bgpd_disable(inno);
return 0;
}