diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/dsi.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 175 |
1 files changed, 97 insertions, 78 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index ec475d022fa0..88b9d64c77bf 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -840,7 +840,9 @@ static void tegra_dsi_unprepare(struct tegra_dsi *dsi) dev_err(dsi->dev, "failed to disable MIPI calibration: %d\n", err); - pm_runtime_put(dsi->dev); + err = host1x_client_suspend(&dsi->client); + if (err < 0) + dev_err(dsi->dev, "failed to suspend: %d\n", err); } static void tegra_dsi_encoder_disable(struct drm_encoder *encoder) @@ -882,11 +884,15 @@ static void tegra_dsi_encoder_disable(struct drm_encoder *encoder) tegra_dsi_unprepare(dsi); } -static void tegra_dsi_prepare(struct tegra_dsi *dsi) +static int tegra_dsi_prepare(struct tegra_dsi *dsi) { int err; - pm_runtime_get_sync(dsi->dev); + err = host1x_client_resume(&dsi->client); + if (err < 0) { + dev_err(dsi->dev, "failed to resume: %d\n", err); + return err; + } err = tegra_mipi_enable(dsi->mipi); if (err < 0) @@ -899,6 +905,8 @@ static void tegra_dsi_prepare(struct tegra_dsi *dsi) if (dsi->slave) tegra_dsi_prepare(dsi->slave); + + return 0; } static void tegra_dsi_encoder_enable(struct drm_encoder *encoder) @@ -909,8 +917,13 @@ static void tegra_dsi_encoder_enable(struct drm_encoder *encoder) struct tegra_dsi *dsi = to_dsi(output); struct tegra_dsi_state *state; u32 value; + int err; - tegra_dsi_prepare(dsi); + err = tegra_dsi_prepare(dsi); + if (err < 0) { + dev_err(dsi->dev, "failed to prepare: %d\n", err); + return; + } state = tegra_dsi_get_state(dsi); @@ -1075,9 +1088,89 @@ static int tegra_dsi_exit(struct host1x_client *client) return 0; } +static int tegra_dsi_runtime_suspend(struct host1x_client *client) +{ + struct tegra_dsi *dsi = host1x_client_to_dsi(client); + struct device *dev = client->dev; + int err; + + if (dsi->rst) { + err = reset_control_assert(dsi->rst); + if (err < 0) { + dev_err(dev, "failed to assert reset: %d\n", err); + return err; + } + } + + usleep_range(1000, 2000); + + clk_disable_unprepare(dsi->clk_lp); + clk_disable_unprepare(dsi->clk); + + regulator_disable(dsi->vdd); + pm_runtime_put_sync(dev); + + return 0; +} + +static int tegra_dsi_runtime_resume(struct host1x_client *client) +{ + struct tegra_dsi *dsi = host1x_client_to_dsi(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; + } + + err = regulator_enable(dsi->vdd); + if (err < 0) { + dev_err(dev, "failed to enable VDD supply: %d\n", err); + goto put_rpm; + } + + err = clk_prepare_enable(dsi->clk); + if (err < 0) { + dev_err(dev, "cannot enable DSI clock: %d\n", err); + goto disable_vdd; + } + + err = clk_prepare_enable(dsi->clk_lp); + if (err < 0) { + dev_err(dev, "cannot enable low-power clock: %d\n", err); + goto disable_clk; + } + + usleep_range(1000, 2000); + + if (dsi->rst) { + err = reset_control_deassert(dsi->rst); + if (err < 0) { + dev_err(dev, "cannot assert reset: %d\n", err); + goto disable_clk_lp; + } + } + + return 0; + +disable_clk_lp: + clk_disable_unprepare(dsi->clk_lp); +disable_clk: + clk_disable_unprepare(dsi->clk); +disable_vdd: + regulator_disable(dsi->vdd); +put_rpm: + pm_runtime_put_sync(dev); + return err; +} + static const struct host1x_client_ops dsi_client_ops = { .init = tegra_dsi_init, .exit = tegra_dsi_exit, + .suspend = tegra_dsi_runtime_suspend, + .resume = tegra_dsi_runtime_resume, }; static int tegra_dsi_setup_clocks(struct tegra_dsi *dsi) @@ -1596,79 +1689,6 @@ static int tegra_dsi_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM -static int tegra_dsi_suspend(struct device *dev) -{ - struct tegra_dsi *dsi = dev_get_drvdata(dev); - int err; - - if (dsi->rst) { - err = reset_control_assert(dsi->rst); - if (err < 0) { - dev_err(dev, "failed to assert reset: %d\n", err); - return err; - } - } - - usleep_range(1000, 2000); - - clk_disable_unprepare(dsi->clk_lp); - clk_disable_unprepare(dsi->clk); - - regulator_disable(dsi->vdd); - - return 0; -} - -static int tegra_dsi_resume(struct device *dev) -{ - struct tegra_dsi *dsi = dev_get_drvdata(dev); - int err; - - err = regulator_enable(dsi->vdd); - if (err < 0) { - dev_err(dsi->dev, "failed to enable VDD supply: %d\n", err); - return err; - } - - err = clk_prepare_enable(dsi->clk); - if (err < 0) { - dev_err(dev, "cannot enable DSI clock: %d\n", err); - goto disable_vdd; - } - - err = clk_prepare_enable(dsi->clk_lp); - if (err < 0) { - dev_err(dev, "cannot enable low-power clock: %d\n", err); - goto disable_clk; - } - - usleep_range(1000, 2000); - - if (dsi->rst) { - err = reset_control_deassert(dsi->rst); - if (err < 0) { - dev_err(dev, "cannot assert reset: %d\n", err); - goto disable_clk_lp; - } - } - - return 0; - -disable_clk_lp: - clk_disable_unprepare(dsi->clk_lp); -disable_clk: - clk_disable_unprepare(dsi->clk); -disable_vdd: - regulator_disable(dsi->vdd); - return err; -} -#endif - -static const struct dev_pm_ops tegra_dsi_pm_ops = { - SET_RUNTIME_PM_OPS(tegra_dsi_suspend, tegra_dsi_resume, NULL) -}; - static const struct of_device_id tegra_dsi_of_match[] = { { .compatible = "nvidia,tegra210-dsi", }, { .compatible = "nvidia,tegra132-dsi", }, @@ -1682,7 +1702,6 @@ struct platform_driver tegra_dsi_driver = { .driver = { .name = "tegra-dsi", .of_match_table = tegra_dsi_of_match, - .pm = &tegra_dsi_pm_ops, }, .probe = tegra_dsi_probe, .remove = tegra_dsi_remove, |