diff options
author | Thierry Reding <treding@nvidia.com> | 2019-10-15 14:59:37 +0200 |
---|---|---|
committer | Thierry Reding <treding@nvidia.com> | 2019-10-28 11:18:54 +0100 |
commit | 0472c21b83192c61dbac7ba98abe8decacbd1d59 (patch) | |
tree | 1df34d1e640dbfb1bc1433054da2c725c0833396 /drivers/gpu | |
parent | c9533131feebc153feef497ad189d22c00462f4c (diff) | |
download | linux-0472c21b83192c61dbac7ba98abe8decacbd1d59.tar.bz2 |
drm/tegra: sor: Add DisplayPort support
Add support for regular DisplayPort on Tegra210 and Tegra186.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/tegra/dp.c | 10 | ||||
-rw-r--r-- | drivers/gpu/drm/tegra/sor.c | 343 | ||||
-rw-r--r-- | drivers/gpu/drm/tegra/sor.h | 1 |
3 files changed, 348 insertions, 6 deletions
diff --git a/drivers/gpu/drm/tegra/dp.c b/drivers/gpu/drm/tegra/dp.c index 5b6765d653b4..70dfb7d1dec5 100644 --- a/drivers/gpu/drm/tegra/dp.c +++ b/drivers/gpu/drm/tegra/dp.c @@ -623,10 +623,10 @@ static int drm_dp_link_clock_recovery(struct drm_dp_link *link) return err; } - drm_dp_link_train_adjust(&link->train); - if (link->train.clock_recovered) break; + + drm_dp_link_train_adjust(&link->train); } return 0; @@ -682,10 +682,10 @@ static int drm_dp_link_channel_equalization(struct drm_dp_link *link) return err; } - drm_dp_link_train_adjust(&link->train); - if (link->train.channel_equalized) break; + + drm_dp_link_train_adjust(&link->train); } return 0; @@ -851,6 +851,8 @@ int drm_dp_link_train(struct drm_dp_link *link) { int err; + drm_dp_link_train_init(&link->train); + if (link->caps.fast_training) { if (drm_dp_link_train_valid(&link->train)) { err = drm_dp_link_train_fast(link); diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 9e6a1ab7ef65..9cf008d7c67b 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -2904,6 +2904,236 @@ static const struct drm_encoder_helper_funcs tegra_sor_hdmi_helpers = { .atomic_check = tegra_sor_encoder_atomic_check, }; +static void tegra_sor_dp_disable(struct drm_encoder *encoder) +{ + struct tegra_output *output = encoder_to_output(encoder); + struct tegra_dc *dc = to_tegra_dc(encoder->crtc); + struct tegra_sor *sor = to_sor(output); + u32 value; + int err; + + err = drm_dp_link_power_down(sor->aux, &sor->link); + if (err < 0) + dev_err(sor->dev, "failed to power down link: %d\n", err); + + err = tegra_sor_detach(sor); + if (err < 0) + dev_err(sor->dev, "failed to detach SOR: %d\n", err); + + tegra_sor_writel(sor, 0, SOR_STATE1); + tegra_sor_update(sor); + + value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); + + if (!sor->soc->has_nvdisplay) + value &= ~(SOR1_TIMING_CYA | SOR_ENABLE(1)); + else + value &= ~SOR_ENABLE(sor->index); + + tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); + tegra_dc_commit(dc); + + value = tegra_sor_readl(sor, SOR_STATE1); + value &= ~SOR_STATE_ASY_PROTOCOL_MASK; + value &= ~SOR_STATE_ASY_SUBOWNER_MASK; + value &= ~SOR_STATE_ASY_OWNER_MASK; + tegra_sor_writel(sor, value, SOR_STATE1); + tegra_sor_update(sor); + + /* switch to safe parent clock */ + err = tegra_sor_set_parent_clock(sor, sor->clk_safe); + if (err < 0) + dev_err(sor->dev, "failed to set safe clock: %d\n", err); + + err = tegra_sor_power_down(sor); + if (err < 0) + dev_err(sor->dev, "failed to power down SOR: %d\n", err); + + err = tegra_io_pad_power_disable(sor->pad); + if (err < 0) + dev_err(sor->dev, "failed to power off I/O pad: %d\n", err); + + err = drm_dp_aux_disable(sor->aux); + if (err < 0) + dev_err(sor->dev, "failed disable DPAUX: %d\n", err); + + pm_runtime_put(sor->dev); +} + +static void tegra_sor_dp_enable(struct drm_encoder *encoder) +{ + struct tegra_output *output = encoder_to_output(encoder); + struct tegra_dc *dc = to_tegra_dc(encoder->crtc); + struct tegra_sor *sor = to_sor(output); + struct tegra_sor_config config; + struct tegra_sor_state *state; + struct drm_display_mode *mode; + struct drm_display_info *info; + unsigned int i; + u32 value; + int err; + + state = to_sor_state(output->connector.state); + mode = &encoder->crtc->state->adjusted_mode; + info = &output->connector.display_info; + + pm_runtime_get_sync(sor->dev); + + /* switch to safe parent clock */ + err = tegra_sor_set_parent_clock(sor, sor->clk_safe); + if (err < 0) + dev_err(sor->dev, "failed to set safe parent clock: %d\n", err); + + err = tegra_io_pad_power_enable(sor->pad); + if (err < 0) + dev_err(sor->dev, "failed to power on LVDS rail: %d\n", err); + + usleep_range(20, 100); + + err = drm_dp_aux_enable(sor->aux); + if (err < 0) + dev_err(sor->dev, "failed to enable DPAUX: %d\n", err); + + err = drm_dp_link_probe(sor->aux, &sor->link); + if (err < 0) + dev_err(sor->dev, "failed to probe DP link: %d\n", err); + + err = drm_dp_link_choose(&sor->link, mode, info); + if (err < 0) + dev_err(sor->dev, "failed to choose link: %d\n", err); + + value = tegra_sor_readl(sor, sor->soc->regs->pll2); + value &= ~SOR_PLL2_BANDGAP_POWERDOWN; + tegra_sor_writel(sor, value, sor->soc->regs->pll2); + + usleep_range(20, 40); + + value = tegra_sor_readl(sor, sor->soc->regs->pll3); + value |= SOR_PLL3_PLL_VDD_MODE_3V3; + tegra_sor_writel(sor, value, sor->soc->regs->pll3); + + value = tegra_sor_readl(sor, sor->soc->regs->pll0); + value &= ~(SOR_PLL0_VCOPD | SOR_PLL0_PWR); + tegra_sor_writel(sor, value, sor->soc->regs->pll0); + + value = tegra_sor_readl(sor, sor->soc->regs->pll2); + value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE; + value |= SOR_PLL2_SEQ_PLLCAPPD; + tegra_sor_writel(sor, value, sor->soc->regs->pll2); + + usleep_range(200, 400); + + value = tegra_sor_readl(sor, sor->soc->regs->pll2); + value &= ~SOR_PLL2_POWERDOWN_OVERRIDE; + value &= ~SOR_PLL2_PORT_POWERDOWN; + tegra_sor_writel(sor, value, sor->soc->regs->pll2); + + value = tegra_sor_readl(sor, SOR_CLK_CNTRL); + value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK; + value |= SOR_CLK_CNTRL_DP_CLK_SEL_DIFF_DPCLK; + tegra_sor_writel(sor, value, SOR_CLK_CNTRL); + + usleep_range(200, 400); + + value = tegra_sor_readl(sor, SOR_DP_SPARE0); + /* XXX not in TRM */ + value &= ~SOR_DP_SPARE_PANEL_INTERNAL; + value |= SOR_DP_SPARE_SEQ_ENABLE; + tegra_sor_writel(sor, value, SOR_DP_SPARE0); + + /* XXX not in TRM */ + tegra_sor_writel(sor, 0, SOR_LVDS); + + value = tegra_sor_readl(sor, sor->soc->regs->pll0); + value &= ~SOR_PLL0_ICHPMP_MASK; + value &= ~SOR_PLL0_VCOCAP_MASK; + value |= SOR_PLL0_ICHPMP(0x1); + value |= SOR_PLL0_VCOCAP(0x3); + value |= SOR_PLL0_RESISTOR_EXT; + tegra_sor_writel(sor, value, sor->soc->regs->pll0); + + /* XXX not in TRM */ + for (value = 0, i = 0; i < 5; i++) + value |= SOR_XBAR_CTRL_LINK0_XSEL(i, sor->soc->xbar_cfg[i]) | + SOR_XBAR_CTRL_LINK1_XSEL(i, i); + + tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL); + tegra_sor_writel(sor, value, SOR_XBAR_CTRL); + + /* switch to DP parent clock */ + err = tegra_sor_set_parent_clock(sor, sor->clk_pad); + if (err < 0) { + dev_err(sor->dev, "failed to switch to pad clock: %d\n", err); + return; + } + + err = clk_set_parent(sor->clk, sor->clk_parent); + if (err < 0) { + dev_err(sor->dev, "failed to switch to parent clock: %d\n", err); + return; + } + + /* use DP-A protocol */ + value = tegra_sor_readl(sor, SOR_STATE1); + value &= ~SOR_STATE_ASY_PROTOCOL_MASK; + value |= SOR_STATE_ASY_PROTOCOL_DP_A; + tegra_sor_writel(sor, value, SOR_STATE1); + + /* enable port */ + value = tegra_sor_readl(sor, SOR_DP_LINKCTL0); + value |= SOR_DP_LINKCTL_ENABLE; + tegra_sor_writel(sor, value, SOR_DP_LINKCTL0); + + tegra_sor_dp_term_calibrate(sor); + + err = drm_dp_link_train(&sor->link); + if (err < 0) + dev_err(sor->dev, "link training failed: %d\n", err); + else + dev_dbg(sor->dev, "link training succeeded\n"); + + err = drm_dp_link_power_up(sor->aux, &sor->link); + if (err < 0) + dev_err(sor->dev, "failed to power up DP link: %d\n", err); + + /* compute configuration */ + memset(&config, 0, sizeof(config)); + config.bits_per_pixel = state->bpc * 3; + + err = tegra_sor_compute_config(sor, mode, &config, &sor->link); + if (err < 0) + dev_err(sor->dev, "failed to compute configuration: %d\n", err); + + tegra_sor_apply_config(sor, &config); + tegra_sor_mode_set(sor, mode, state); + tegra_sor_update(sor); + + err = tegra_sor_power_up(sor, 250); + if (err < 0) + dev_err(sor->dev, "failed to power up SOR: %d\n", err); + + /* attach and wake up */ + err = tegra_sor_attach(sor); + if (err < 0) + dev_err(sor->dev, "failed to attach SOR: %d\n", err); + + value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); + value |= SOR_ENABLE(sor->index); + tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); + + tegra_dc_commit(dc); + + err = tegra_sor_wakeup(sor); + if (err < 0) + dev_err(sor->dev, "failed to wakeup SOR: %d\n", err); +} + +static const struct drm_encoder_helper_funcs tegra_sor_dp_helpers = { + .disable = tegra_sor_dp_disable, + .enable = tegra_sor_dp_enable, + .atomic_check = tegra_sor_encoder_atomic_check, +}; + static int tegra_sor_init(struct host1x_client *client) { struct drm_device *drm = dev_get_drvdata(client->parent); @@ -2930,6 +3160,7 @@ static int tegra_sor_init(struct host1x_client *client) } else if (sor->soc->supports_dp) { connector = DRM_MODE_CONNECTOR_DisplayPort; encoder = DRM_MODE_ENCODER_TMDS; + helpers = &tegra_sor_dp_helpers; } sor->link.ops = &tegra_sor_dp_link_ops; @@ -3115,6 +3346,43 @@ static const struct tegra_sor_ops tegra_sor_hdmi_ops = { .remove = tegra_sor_hdmi_remove, }; +static int tegra_sor_dp_probe(struct tegra_sor *sor) +{ + int err; + + sor->avdd_io_supply = devm_regulator_get(sor->dev, "avdd-io-hdmi-dp"); + if (IS_ERR(sor->avdd_io_supply)) + return PTR_ERR(sor->avdd_io_supply); + + err = regulator_enable(sor->avdd_io_supply); + if (err < 0) + return err; + + sor->vdd_pll_supply = devm_regulator_get(sor->dev, "vdd-hdmi-dp-pll"); + if (IS_ERR(sor->vdd_pll_supply)) + return PTR_ERR(sor->vdd_pll_supply); + + err = regulator_enable(sor->vdd_pll_supply); + if (err < 0) + return err; + + return 0; +} + +static int tegra_sor_dp_remove(struct tegra_sor *sor) +{ + regulator_disable(sor->vdd_pll_supply); + regulator_disable(sor->avdd_io_supply); + + return 0; +} + +static const struct tegra_sor_ops tegra_sor_dp_ops = { + .name = "DP", + .probe = tegra_sor_dp_probe, + .remove = tegra_sor_dp_remove, +}; + static const u8 tegra124_sor_xbar_cfg[5] = { 0, 1, 2, 3, 4 }; @@ -3308,6 +3576,10 @@ static const u8 tegra210_sor_xbar_cfg[5] = { 2, 1, 0, 3, 4 }; +static const u8 tegra210_sor_lane_map[4] = { + 0, 1, 2, 3, +}; + static const struct tegra_sor_soc tegra210_sor = { .supports_edp = true, .supports_lvds = false, @@ -3318,6 +3590,11 @@ static const struct tegra_sor_soc tegra210_sor = { .has_nvdisplay = false, .xbar_cfg = tegra210_sor_xbar_cfg, + .lane_map = tegra210_sor_lane_map, + .voltage_swing = tegra124_sor_voltage_swing, + .pre_emphasis = tegra124_sor_pre_emphasis, + .post_cursor = tegra124_sor_post_cursor, + .tx_pu = tegra124_sor_tx_pu, }; static const struct tegra_sor_soc tegra210_sor1 = { @@ -3332,6 +3609,11 @@ static const struct tegra_sor_soc tegra210_sor1 = { .num_settings = ARRAY_SIZE(tegra210_sor_hdmi_defaults), .settings = tegra210_sor_hdmi_defaults, .xbar_cfg = tegra210_sor_xbar_cfg, + .lane_map = tegra210_sor_lane_map, + .voltage_swing = tegra124_sor_voltage_swing, + .pre_emphasis = tegra124_sor_pre_emphasis, + .post_cursor = tegra124_sor_post_cursor, + .tx_pu = tegra124_sor_tx_pu, }; static const struct tegra_sor_regs tegra186_sor_regs = { @@ -3349,6 +3631,54 @@ static const struct tegra_sor_regs tegra186_sor_regs = { .dp_padctl2 = 0x16a, }; +static const u8 tegra186_sor_voltage_swing[4][4][4] = { + { + { 0x13, 0x19, 0x1e, 0x28 }, + { 0x1e, 0x25, 0x2d, }, + { 0x28, 0x32, }, + { 0x39, }, + }, { + { 0x12, 0x16, 0x1b, 0x25 }, + { 0x1c, 0x23, 0x2a, }, + { 0x25, 0x2f, }, + { 0x37, } + }, { + { 0x12, 0x16, 0x1a, 0x22 }, + { 0x1b, 0x20, 0x27, }, + { 0x24, 0x2d, }, + { 0x35, }, + }, { + { 0x11, 0x14, 0x17, 0x1f }, + { 0x19, 0x1e, 0x24, }, + { 0x22, 0x2a, }, + { 0x32, }, + }, +}; + +static const u8 tegra186_sor_pre_emphasis[4][4][4] = { + { + { 0x00, 0x08, 0x12, 0x24 }, + { 0x01, 0x0e, 0x1d, }, + { 0x01, 0x13, }, + { 0x00, }, + }, { + { 0x00, 0x08, 0x12, 0x24 }, + { 0x00, 0x0e, 0x1d, }, + { 0x00, 0x13, }, + { 0x00 }, + }, { + { 0x00, 0x08, 0x14, 0x24 }, + { 0x00, 0x0e, 0x1d, }, + { 0x00, 0x13, }, + { 0x00, }, + }, { + { 0x00, 0x08, 0x12, 0x24 }, + { 0x00, 0x0e, 0x1d, }, + { 0x00, 0x13, }, + { 0x00, }, + }, +}; + static const struct tegra_sor_soc tegra186_sor = { .supports_edp = false, .supports_lvds = false, @@ -3359,6 +3689,11 @@ static const struct tegra_sor_soc tegra186_sor = { .has_nvdisplay = true, .xbar_cfg = tegra124_sor_xbar_cfg, + .lane_map = tegra124_sor_lane_map, + .voltage_swing = tegra186_sor_voltage_swing, + .pre_emphasis = tegra186_sor_pre_emphasis, + .post_cursor = tegra124_sor_post_cursor, + .tx_pu = tegra124_sor_tx_pu, }; static const struct tegra_sor_soc tegra186_sor1 = { @@ -3373,6 +3708,11 @@ static const struct tegra_sor_soc tegra186_sor1 = { .num_settings = ARRAY_SIZE(tegra186_sor_hdmi_defaults), .settings = tegra186_sor_hdmi_defaults, .xbar_cfg = tegra124_sor_xbar_cfg, + .lane_map = tegra124_sor_lane_map, + .voltage_swing = tegra186_sor_voltage_swing, + .pre_emphasis = tegra186_sor_pre_emphasis, + .post_cursor = tegra124_sor_post_cursor, + .tx_pu = tegra124_sor_tx_pu, }; static const struct tegra_sor_regs tegra194_sor_regs = { @@ -3530,8 +3870,7 @@ static int tegra_sor_probe(struct platform_device *pdev) sor->ops = &tegra_sor_edp_ops; sor->pad = TEGRA_IO_PAD_LVDS; } else if (sor->soc->supports_dp) { - dev_err(&pdev->dev, "DisplayPort not supported yet\n"); - return -ENODEV; + sor->ops = &tegra_sor_dp_ops; } else { dev_err(&pdev->dev, "unknown (DP) support\n"); return -ENODEV; diff --git a/drivers/gpu/drm/tegra/sor.h b/drivers/gpu/drm/tegra/sor.h index 5333406c0401..00e09d5dca30 100644 --- a/drivers/gpu/drm/tegra/sor.h +++ b/drivers/gpu/drm/tegra/sor.h @@ -39,6 +39,7 @@ #define SOR_STATE_ASY_CRC_MODE_NON_ACTIVE (0x2 << 6) #define SOR_STATE_ASY_CRC_MODE_COMPLETE (0x1 << 6) #define SOR_STATE_ASY_CRC_MODE_ACTIVE (0x0 << 6) +#define SOR_STATE_ASY_SUBOWNER_MASK (0x3 << 4) #define SOR_STATE_ASY_OWNER_MASK 0xf #define SOR_STATE_ASY_OWNER(x) (((x) & 0xf) << 0) |