This completes the DPHY initialization and Tx initialization.
v2: minor code review changes Signed-off-by: Anitha Chrisanthus anitha.chrisanthus@intel.com Reviewed-by: Bob Paauwe bob.j.paauwe@intel.com --- drivers/gpu/drm/kmb/kmb_dsi.c | 65 ++++++++++++++++++++++++++++++++++++++---- drivers/gpu/drm/kmb/kmb_dsi.h | 18 ++++++++++++ drivers/gpu/drm/kmb/kmb_regs.h | 15 ++++++++-- 3 files changed, 91 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c index b7f23af..51bec35 100644 --- a/drivers/gpu/drm/kmb/kmb_dsi.c +++ b/drivers/gpu/drm/kmb/kmb_dsi.c @@ -48,6 +48,7 @@ #define MIPI_TX_CFG_CLK_KHZ 24000
/*DPHY Tx test codes*/ +#define TEST_CODE_FSM_CONTROL 0x03 #define TEST_CODE_PLL_PROPORTIONAL_CHARGE_PUMP_CTRL 0x0E #define TEST_CODE_PLL_INTEGRAL_CHARGE_PUMP_CTRL 0x0F #define TEST_CODE_PLL_VCO_CTRL 0x12 @@ -1081,10 +1082,10 @@ static void dphy_init_sequence(struct mipi_ctrl_cfg *cfg, u32 dphy_no, cfg->lane_rate_mbps/2);
/*Set clksel */ - kmb_write_bits_mipi(DPHY_INIT_CTRL1, 18, 2, 0x01); + kmb_write_bits_mipi(DPHY_INIT_CTRL1, PLL_CLKSEL_0, 2, 0x01);
/*Set pll_shadow_control */ - kmb_write_bits_mipi(DPHY_INIT_CTRL1, 16, 1, 0x01); + kmb_set_bit_mipi(DPHY_INIT_CTRL1, PLL_SHADOW_CTRL); }
/*Send NORMAL OPERATION test code */ @@ -1107,7 +1108,48 @@ static void dphy_init_sequence(struct mipi_ctrl_cfg *cfg, u32 dphy_no,
/* enable DATA LANES */ kmb_write_bits_mipi(DPHY_ENABLE, dphy_no * 2, 2, - ((1 << cfg->active_lanes) - 1)); + ((1 << cfg->active_lanes) - 1)); + + /*Take D-PHY out of shutdown mode */ + /* deassert SHUTDOWNZ signal*/ + SET_DPHY_INIT_CTRL0(dphy_no, SHUTDOWNZ); + /*deassert RSTZ signal */ + SET_DPHY_INIT_CTRL0(dphy_no, RESETZ); +} + +static void dphy_wait_fsm(u32 dphy_no, enum dphy_tx_fsm fsm_state) +{ + enum dphy_tx_fsm val = DPHY_TX_POWERDWN; + + do { + test_mode_send(dphy_no, TEST_CODE_FSM_CONTROL, 0x80); + /*TODO-need to add a time out and return failure */ + val = GET_TEST_DOUT0_3(dphy_no); + } while (val != fsm_state); + +} + +static u32 wait_init_done(u32 dphy_no, u32 active_lanes) +{ + u32 stopstatedata = 0; + u32 data_lanes = (1 << active_lanes) - 1; + + do { + stopstatedata = GET_STOPSTATE_DATA(dphy_no); + /*TODO-need to add a time out and return failure */ + } while (stopstatedata != data_lanes); + + return 0; +} + +static u32 wait_pll_lock(u32 dphy_no) +{ + do { + ; + /*TODO-need to add a time out and return failure */ + } while (!GET_PLL_LOCK(dphy_no)); + + return 0; }
static u32 mipi_tx_init_dphy(struct mipi_ctrl_cfg *cfg) @@ -1133,9 +1175,22 @@ static u32 mipi_tx_init_dphy(struct mipi_ctrl_cfg *cfg) */ /*PHY #N+1 ('slave') */ dphy_init_sequence(cfg, dphy_no + 1, MIPI_DPHY_SLAVE); - /*TODO PHY #N master */ + + dphy_wait_fsm(dphy_no + 1, DPHY_TX_LOCK); + + /*PHY #N master*/ + dphy_init_sequence(cfg, dphy_no, MIPI_DPHY_MASTER); + /* wait for DPHY init to complete */ + wait_init_done(dphy_no, MIPI_DPHY_D_LANES); + wait_init_done(dphy_no + 1, + cfg->active_lanes - MIPI_DPHY_D_LANES); + wait_pll_lock(dphy_no); + wait_pll_lock(dphy_no + 1); + } else { /* Single DPHY */ + dphy_init_sequence(cfg, dphy_no, MIPI_DPHY_MASTER); + wait_init_done(dphy_no, cfg->active_lanes); + wait_pll_lock(dphy_no); } - /*TODO- Single DPHY */ return 0; }
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h index d878d27..eb38ae7 100644 --- a/drivers/gpu/drm/kmb/kmb_dsi.h +++ b/drivers/gpu/drm/kmb/kmb_dsi.h @@ -204,12 +204,30 @@ enum dphy_mode { MIPI_DPHY_MASTER };
+enum dphy_tx_fsm { + DPHY_TX_POWERDWN = 0, + DPHY_TX_BGPON, + DPHY_TX_TERMCAL, + DPHY_TX_TERMCALUP, + DPHY_TX_OFFSETCAL, + DPHY_TX_LOCK, + DPHY_TX_SRCAL, + DPHY_TX_IDLE, + DPHY_TX_ULP, + DPHY_TX_LANESTART, + DPHY_TX_CLKALIGN, + DPHY_TX_DDLTUNNING, + DPHY_TX_ULP_FORCE_PLL, + DPHY_TX_LOCK_LOSS +}; + struct mipi_data_type_params { uint8_t size_constraint_pixels; uint8_t size_constraint_bytes; uint8_t pixels_per_pclk; uint8_t bits_per_pclk; }; + struct mipi_tx_dsi_cfg { uint8_t hfp_blank_en; /*horizontal front porch blanking enable */ uint8_t eotp_en; /*End of transmission packet enable */ diff --git a/drivers/gpu/drm/kmb/kmb_regs.h b/drivers/gpu/drm/kmb/kmb_regs.h index dedee04..b6f6acf 100644 --- a/drivers/gpu/drm/kmb/kmb_regs.h +++ b/drivers/gpu/drm/kmb/kmb_regs.h @@ -524,9 +524,11 @@ /* D-PHY regs */ #define DPHY_ENABLE (0x100) #define DPHY_INIT_CTRL0 (0x104) -#define DPHY_INIT_CTRL1 (0x108) #define SHUTDOWNZ 0 #define RESETZ 12 +#define DPHY_INIT_CTRL1 (0x108) +#define PLL_CLKSEL_0 18 +#define PLL_SHADOW_CTRL 16 #define DPHY_INIT_CTRL2 (0x10c) #define SET_DPHY_INIT_CTRL0(dphy, offset) \ kmb_set_bit_mipi(DPHY_INIT_CTRL0, \ @@ -540,6 +542,12 @@ kmb_write_bits_mipi(DPHY_FREQ_CTRL0_3 \ + ((dphy/4)*4), (dphy % 4) * 8, \ 6, val) + +#define MIPI_DPHY_STAT0_3 (0x134) +#define GET_STOPSTATE_DATA(dphy) \ + (((kmb_read_mipi(MIPI_DPHY_STAT0_3 + \ + (dphy/4)*4)) \ + >> (((dphy % 4)*8)+4)) & 0x03) #define DPHY_TEST_CTRL0 (0x154) #define SET_DPHY_TEST_CTRL0(dphy) kmb_set_bit_mipi(DPHY_TEST_CTRL0, \ (dphy)) @@ -558,8 +566,11 @@ #define SET_TEST_DIN0_3(dphy, val) kmb_write_mipi(DPHY_TEST_DIN0_3 + \ 4, ((val) << (((dphy)%4)*8))) #define DPHY_TEST_DOUT0_3 (0x168) -#define GET_TEST_DOUT0_3(dphy) (readl(DPHY_TEST_DOUT0_3 + 4) \ +#define GET_TEST_DOUT0_3(dphy) (kmb_read_mipi(DPHY_TEST_DOUT0_3 + 4) \ >> (((dphy)%4)*8) & 0xff) +#define DPHY_PLL_LOCK (0x188) +#define GET_PLL_LOCK(dphy) (kmb_read_mipi(DPHY_PLL_LOCK) \ + & (1 << (dphy - MIPI_DPHY6))) #define DPHY_CFG_CLK_EN (0x18c)
#define MIPI_TX_MSS_LCD_MIPI_CFG (0x04)