diff options
Diffstat (limited to 'drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c')
| -rw-r--r-- | drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c new file mode 100644 index 000000000000..391433c1af7c --- /dev/null +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c @@ -0,0 +1,214 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "hdmi.h" + +struct hdmi_phy_8x60 { + struct hdmi_phy base; + struct hdmi *hdmi; +}; +#define to_hdmi_phy_8x60(x) container_of(x, struct hdmi_phy_8x60, base) + +static void hdmi_phy_8x60_destroy(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x60 *phy_8x60 = to_hdmi_phy_8x60(phy); + kfree(phy_8x60); +} + +static void hdmi_phy_8x60_reset(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x60 *phy_8x60 = to_hdmi_phy_8x60(phy); + struct hdmi *hdmi = phy_8x60->hdmi; + unsigned int val; + + val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL); + + if (val & HDMI_PHY_CTRL_SW_RESET_LOW) { + /* pull low */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val & ~HDMI_PHY_CTRL_SW_RESET); + } else { + /* pull high */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val | HDMI_PHY_CTRL_SW_RESET); + } + + msleep(100); + + if (val & HDMI_PHY_CTRL_SW_RESET_LOW) { + /* pull high */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val | HDMI_PHY_CTRL_SW_RESET); + } else { + /* pull low */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val & ~HDMI_PHY_CTRL_SW_RESET); + } +} + +static void hdmi_phy_8x60_powerup(struct hdmi_phy *phy, + unsigned long int pixclock) +{ + struct hdmi_phy_8x60 *phy_8x60 = to_hdmi_phy_8x60(phy); + struct hdmi *hdmi = phy_8x60->hdmi; + + /* De-serializer delay D/C for non-lbk mode: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG0, + HDMI_8x60_PHY_REG0_DESER_DEL_CTRL(3)); + + if (pixclock == 27000000) { + /* video_format == HDMI_VFRMT_720x480p60_16_9 */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG1, + HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(5) | + HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(3)); + } else { + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG1, + HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(5) | + HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(4)); + } + + /* No matter what, start from the power down mode: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_PD_PWRGEN | + HDMI_8x60_PHY_REG2_PD_PLL | + HDMI_8x60_PHY_REG2_PD_DRIVE_4 | + HDMI_8x60_PHY_REG2_PD_DRIVE_3 | + HDMI_8x60_PHY_REG2_PD_DRIVE_2 | + HDMI_8x60_PHY_REG2_PD_DRIVE_1 | + HDMI_8x60_PHY_REG2_PD_DESER); + + /* Turn PowerGen on: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_PD_PLL | + HDMI_8x60_PHY_REG2_PD_DRIVE_4 | + HDMI_8x60_PHY_REG2_PD_DRIVE_3 | + HDMI_8x60_PHY_REG2_PD_DRIVE_2 | + HDMI_8x60_PHY_REG2_PD_DRIVE_1 | + HDMI_8x60_PHY_REG2_PD_DESER); + + /* Turn PLL power on: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_PD_DRIVE_4 | + HDMI_8x60_PHY_REG2_PD_DRIVE_3 | + HDMI_8x60_PHY_REG2_PD_DRIVE_2 | + HDMI_8x60_PHY_REG2_PD_DRIVE_1 | + HDMI_8x60_PHY_REG2_PD_DESER); + + /* Write to HIGH after PLL power down de-assert: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG3, + HDMI_8x60_PHY_REG3_PLL_ENABLE); + + /* ASIC power on; PHY REG9 = 0 */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG9, 0); + + /* Enable PLL lock detect, PLL lock det will go high after lock + * Enable the re-time logic + */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG12, + HDMI_8x60_PHY_REG12_RETIMING_EN | + HDMI_8x60_PHY_REG12_PLL_LOCK_DETECT_EN); + + /* Drivers are on: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_PD_DESER); + + /* If the RX detector is needed: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_RCV_SENSE_EN | + HDMI_8x60_PHY_REG2_PD_DESER); + + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG4, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG5, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG6, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG7, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG8, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG9, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG10, 0); + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG11, 0); + + /* If we want to use lock enable based on counting: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG12, + HDMI_8x60_PHY_REG12_RETIMING_EN | + HDMI_8x60_PHY_REG12_PLL_LOCK_DETECT_EN | + HDMI_8x60_PHY_REG12_FORCE_LOCK); +} + +static void hdmi_phy_8x60_powerdown(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x60 *phy_8x60 = to_hdmi_phy_8x60(phy); + struct hdmi *hdmi = phy_8x60->hdmi; + + /* Assert RESET PHY from controller */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + HDMI_PHY_CTRL_SW_RESET); + udelay(10); + /* De-assert RESET PHY from controller */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, 0); + /* Turn off Driver */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_PD_DRIVE_4 | + HDMI_8x60_PHY_REG2_PD_DRIVE_3 | + HDMI_8x60_PHY_REG2_PD_DRIVE_2 | + HDMI_8x60_PHY_REG2_PD_DRIVE_1 | + HDMI_8x60_PHY_REG2_PD_DESER); + udelay(10); + /* Disable PLL */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG3, 0); + /* Power down PHY, but keep RX-sense: */ + hdmi_write(hdmi, REG_HDMI_8x60_PHY_REG2, + HDMI_8x60_PHY_REG2_RCV_SENSE_EN | + HDMI_8x60_PHY_REG2_PD_PWRGEN | + HDMI_8x60_PHY_REG2_PD_PLL | + HDMI_8x60_PHY_REG2_PD_DRIVE_4 | + HDMI_8x60_PHY_REG2_PD_DRIVE_3 | + HDMI_8x60_PHY_REG2_PD_DRIVE_2 | + HDMI_8x60_PHY_REG2_PD_DRIVE_1 | + HDMI_8x60_PHY_REG2_PD_DESER); +} + +static const struct hdmi_phy_funcs hdmi_phy_8x60_funcs = { + .destroy = hdmi_phy_8x60_destroy, + .reset = hdmi_phy_8x60_reset, + .powerup = hdmi_phy_8x60_powerup, + .powerdown = hdmi_phy_8x60_powerdown, +}; + +struct hdmi_phy *hdmi_phy_8x60_init(struct hdmi *hdmi) +{ + struct hdmi_phy_8x60 *phy_8x60; + struct hdmi_phy *phy = NULL; + int ret; + + phy_8x60 = kzalloc(sizeof(*phy_8x60), GFP_KERNEL); + if (!phy_8x60) { + ret = -ENOMEM; + goto fail; + } + + phy = &phy_8x60->base; + + phy->funcs = &hdmi_phy_8x60_funcs; + + phy_8x60->hdmi = hdmi; + + return phy; + +fail: + if (phy) + hdmi_phy_8x60_destroy(phy); + return ERR_PTR(ret); +} |