diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/dc.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/dc.c | 147 |
1 files changed, 87 insertions, 60 deletions
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 714af052fbef..7c70fd31a4c2 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1727,6 +1727,7 @@ static void tegra_crtc_atomic_disable(struct drm_crtc *crtc, { struct tegra_dc *dc = to_tegra_dc(crtc); u32 value; + int err; if (!tegra_dc_idle(dc)) { tegra_dc_stop(dc); @@ -1773,7 +1774,9 @@ static void tegra_crtc_atomic_disable(struct drm_crtc *crtc, spin_unlock_irq(&crtc->dev->event_lock); - pm_runtime_put_sync(dc->dev); + err = host1x_client_suspend(&dc->client); + if (err < 0) + dev_err(dc->dev, "failed to suspend: %d\n", err); } static void tegra_crtc_atomic_enable(struct drm_crtc *crtc, @@ -1783,8 +1786,13 @@ static void tegra_crtc_atomic_enable(struct drm_crtc *crtc, struct tegra_dc_state *state = to_dc_state(crtc->state); struct tegra_dc *dc = to_tegra_dc(crtc); u32 value; + int err; - pm_runtime_get_sync(dc->dev); + err = host1x_client_resume(&dc->client); + if (err < 0) { + dev_err(dc->dev, "failed to resume: %d\n", err); + return; + } /* initialize display controller */ if (dc->syncpt) { @@ -1996,7 +2004,7 @@ static bool tegra_dc_has_window_groups(struct tegra_dc *dc) static int tegra_dc_init(struct host1x_client *client) { - struct drm_device *drm = dev_get_drvdata(client->parent); + struct drm_device *drm = dev_get_drvdata(client->host); unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED; struct tegra_dc *dc = host1x_client_to_dc(client); struct tegra_drm *tegra = drm->dev_private; @@ -2012,6 +2020,15 @@ static int tegra_dc_init(struct host1x_client *client) if (!tegra_dc_has_window_groups(dc)) return 0; + /* + * Set the display hub as the host1x client parent for the display + * controller. This is needed for the runtime reference counting that + * ensures the display hub is always powered when any of the display + * controllers are. + */ + if (dc->soc->has_nvdisplay) + client->parent = &tegra->hub->client; + dc->syncpt = host1x_syncpt_request(client, flags); if (!dc->syncpt) dev_warn(dc->dev, "failed to allocate syncpoint\n"); @@ -2077,9 +2094,9 @@ static int tegra_dc_init(struct host1x_client *client) /* * Inherit the DMA parameters (such as maximum segment size) from the - * parent device. + * parent host1x device. */ - client->dev->dma_parms = client->parent->dma_parms; + client->dev->dma_parms = client->host->dma_parms; return 0; @@ -2121,9 +2138,74 @@ static int tegra_dc_exit(struct host1x_client *client) return 0; } +static int tegra_dc_runtime_suspend(struct host1x_client *client) +{ + struct tegra_dc *dc = host1x_client_to_dc(client); + struct device *dev = client->dev; + int err; + + err = reset_control_assert(dc->rst); + if (err < 0) { + dev_err(dev, "failed to assert reset: %d\n", err); + return err; + } + + if (dc->soc->has_powergate) + tegra_powergate_power_off(dc->powergate); + + clk_disable_unprepare(dc->clk); + pm_runtime_put_sync(dev); + + return 0; +} + +static int tegra_dc_runtime_resume(struct host1x_client *client) +{ + struct tegra_dc *dc = host1x_client_to_dc(client); + struct device *dev = client->dev; + int err; + + err = pm_runtime_get_sync(dev); + if (err < 0) { + dev_err(dev, "failed to get runtime PM: %d\n", err); + return err; + } + + if (dc->soc->has_powergate) { + err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk, + dc->rst); + if (err < 0) { + dev_err(dev, "failed to power partition: %d\n", err); + goto put_rpm; + } + } else { + err = clk_prepare_enable(dc->clk); + if (err < 0) { + dev_err(dev, "failed to enable clock: %d\n", err); + goto put_rpm; + } + + err = reset_control_deassert(dc->rst); + if (err < 0) { + dev_err(dev, "failed to deassert reset: %d\n", err); + goto disable_clk; + } + } + + return 0; + +disable_clk: + clk_disable_unprepare(dc->clk); +put_rpm: + pm_runtime_put_sync(dev); + return err; +} + static const struct host1x_client_ops dc_client_ops = { .init = tegra_dc_init, .exit = tegra_dc_exit, + .suspend = tegra_dc_runtime_suspend, + .resume = tegra_dc_runtime_resume, }; static const struct tegra_dc_soc_info tegra20_dc_soc_info = { @@ -2535,65 +2617,10 @@ static int tegra_dc_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM -static int tegra_dc_suspend(struct device *dev) -{ - struct tegra_dc *dc = dev_get_drvdata(dev); - int err; - - err = reset_control_assert(dc->rst); - if (err < 0) { - dev_err(dev, "failed to assert reset: %d\n", err); - return err; - } - - if (dc->soc->has_powergate) - tegra_powergate_power_off(dc->powergate); - - clk_disable_unprepare(dc->clk); - - return 0; -} - -static int tegra_dc_resume(struct device *dev) -{ - struct tegra_dc *dc = dev_get_drvdata(dev); - int err; - - if (dc->soc->has_powergate) { - err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk, - dc->rst); - if (err < 0) { - dev_err(dev, "failed to power partition: %d\n", err); - return err; - } - } else { - err = clk_prepare_enable(dc->clk); - if (err < 0) { - dev_err(dev, "failed to enable clock: %d\n", err); - return err; - } - - err = reset_control_deassert(dc->rst); - if (err < 0) { - dev_err(dev, "failed to deassert reset: %d\n", err); - return err; - } - } - - return 0; -} -#endif - -static const struct dev_pm_ops tegra_dc_pm_ops = { - SET_RUNTIME_PM_OPS(tegra_dc_suspend, tegra_dc_resume, NULL) -}; - struct platform_driver tegra_dc_driver = { .driver = { .name = "tegra-dc", .of_match_table = tegra_dc_of_match, - .pm = &tegra_dc_pm_ops, }, .probe = tegra_dc_probe, .remove = tegra_dc_remove, |