diff options
| -rw-r--r-- | drivers/gpu/drm/bridge/dw-hdmi.c | 52 |
1 files changed, 43 insertions, 9 deletions
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c index d863b33..3a1cd4c 100644 --- a/drivers/gpu/drm/bridge/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/dw-hdmi.c @@ -116,6 +116,7 @@ struct dw_hdmi_i2c { struct dw_hdmi_phy_data { enum dw_hdmi_phy_type type; const char *name; + unsigned int gen; bool has_svsret; }; @@ -914,6 +915,40 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable) HDMI_PHY_CONF0_SELDIPIF_MASK); } +static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi) +{ + const struct dw_hdmi_phy_data *phy = hdmi->phy; + unsigned int i; + u16 val; + + if (phy->gen == 1) { + dw_hdmi_phy_enable_tmds(hdmi, 0); + dw_hdmi_phy_enable_powerdown(hdmi, true); + return; + } + + dw_hdmi_phy_gen2_txpwron(hdmi, 0); + + /* + * Wait for TX_PHY_LOCK to be deasserted to indicate that the PHY went + * to low power mode. + */ + for (i = 0; i < 5; ++i) { + val = hdmi_readb(hdmi, HDMI_PHY_STAT0); + if (!(val & HDMI_PHY_TX_PHY_LOCK)) + break; + + usleep_range(1000, 2000); + } + + if (val & HDMI_PHY_TX_PHY_LOCK) + dev_warn(hdmi->dev, "PHY failed to power down\n"); + else + dev_dbg(hdmi->dev, "PHY powered down in %u iterations\n", i); + + dw_hdmi_phy_gen2_pddq(hdmi, 1); +} + static int hdmi_phy_configure(struct dw_hdmi *hdmi) { u8 val, msec; @@ -946,11 +981,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi) return -EINVAL; } - /* gen2 tx power off */ - dw_hdmi_phy_gen2_txpwron(hdmi, 0); - - /* gen2 pddq */ - dw_hdmi_phy_gen2_pddq(hdmi, 1); + dw_hdmi_phy_power_off(hdmi); /* Leave low power consumption mode by asserting SVSRET. */ if (hdmi->phy->has_svsret) @@ -1025,8 +1056,6 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi) for (i = 0; i < 2; i++) { dw_hdmi_phy_sel_data_en_pol(hdmi, 1); dw_hdmi_phy_sel_interface_control(hdmi, 0); - dw_hdmi_phy_enable_tmds(hdmi, 0); - dw_hdmi_phy_enable_powerdown(hdmi, true); ret = hdmi_phy_configure(hdmi); if (ret) @@ -1256,8 +1285,7 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi) if (!hdmi->phy_enabled) return; - dw_hdmi_phy_enable_tmds(hdmi, 0); - dw_hdmi_phy_enable_powerdown(hdmi, true); + dw_hdmi_phy_power_off(hdmi); hdmi->phy_enabled = false; } @@ -1827,23 +1855,29 @@ static const struct dw_hdmi_phy_data dw_hdmi_phys[] = { { .type = DW_HDMI_PHY_DWC_HDMI_TX_PHY, .name = "DWC HDMI TX PHY", + .gen = 1, }, { .type = DW_HDMI_PHY_DWC_MHL_PHY_HEAC, .name = "DWC MHL PHY + HEAC PHY", + .gen = 2, .has_svsret = true, }, { .type = DW_HDMI_PHY_DWC_MHL_PHY, .name = "DWC MHL PHY", + .gen = 2, .has_svsret = true, }, { .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY_HEAC, .name = "DWC HDMI 3D TX PHY + HEAC PHY", + .gen = 2, }, { .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY, .name = "DWC HDMI 3D TX PHY", + .gen = 2, }, { .type = DW_HDMI_PHY_DWC_HDMI20_TX_PHY, .name = "DWC HDMI 2.0 TX PHY", + .gen = 2, .has_svsret = true, } }; |
