diff options
Diffstat (limited to 'drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c')
| -rw-r--r-- | drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c new file mode 100644 index 000000000000..59fa6cdacb2a --- /dev/null +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c @@ -0,0 +1,157 @@ +/* + * 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_8x74 { + struct hdmi_phy base; + struct hdmi *hdmi; + void __iomem *mmio; +}; +#define to_hdmi_phy_8x74(x) container_of(x, struct hdmi_phy_8x74, base) + + +static void phy_write(struct hdmi_phy_8x74 *phy, u32 reg, u32 data) +{ + msm_writel(data, phy->mmio + reg); +} + +//static u32 phy_read(struct hdmi_phy_8x74 *phy, u32 reg) +//{ +// return msm_readl(phy->mmio + reg); +//} + +static void hdmi_phy_8x74_destroy(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy); + kfree(phy_8x74); +} + +static void hdmi_phy_8x74_reset(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy); + struct hdmi *hdmi = phy_8x74->hdmi; + unsigned int val; + + /* NOTE that HDMI_PHY_CTL is in core mmio, not phy mmio: */ + + 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); + } + + if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) { + /* pull low */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val & ~HDMI_PHY_CTRL_SW_RESET_PLL); + } else { + /* pull high */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val | HDMI_PHY_CTRL_SW_RESET_PLL); + } + + 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); + } + + if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) { + /* pull high */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val | HDMI_PHY_CTRL_SW_RESET_PLL); + } else { + /* pull low */ + hdmi_write(hdmi, REG_HDMI_PHY_CTRL, + val & ~HDMI_PHY_CTRL_SW_RESET_PLL); + } +} + +static void hdmi_phy_8x74_powerup(struct hdmi_phy *phy, + unsigned long int pixclock) +{ + struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy); + + phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG0, 0x1b); + phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG1, 0xf2); + phy_write(phy_8x74, REG_HDMI_8x74_BIST_CFG0, 0x0); + phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN0, 0x0); + phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN1, 0x0); + phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN2, 0x0); + phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN3, 0x0); + phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL1, 0x20); +} + +static void hdmi_phy_8x74_powerdown(struct hdmi_phy *phy) +{ + struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy); + phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL0, 0x7f); +} + +static const struct hdmi_phy_funcs hdmi_phy_8x74_funcs = { + .destroy = hdmi_phy_8x74_destroy, + .reset = hdmi_phy_8x74_reset, + .powerup = hdmi_phy_8x74_powerup, + .powerdown = hdmi_phy_8x74_powerdown, +}; + +struct hdmi_phy *hdmi_phy_8x74_init(struct hdmi *hdmi) +{ + struct hdmi_phy_8x74 *phy_8x74; + struct hdmi_phy *phy = NULL; + int ret; + + phy_8x74 = kzalloc(sizeof(*phy_8x74), GFP_KERNEL); + if (!phy_8x74) { + ret = -ENOMEM; + goto fail; + } + + phy = &phy_8x74->base; + + phy->funcs = &hdmi_phy_8x74_funcs; + + phy_8x74->hdmi = hdmi; + + /* for 8x74, the phy mmio is mapped separately: */ + phy_8x74->mmio = msm_ioremap(hdmi->pdev, + "phy_physical", "HDMI_8x74"); + if (IS_ERR(phy_8x74->mmio)) { + ret = PTR_ERR(phy_8x74->mmio); + goto fail; + } + + return phy; + +fail: + if (phy) + hdmi_phy_8x74_destroy(phy); + return ERR_PTR(ret); +} |