diff options
author | Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com> | 2023-01-23 13:47:37 +0300 |
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committer | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2023-01-23 18:56:48 +0300 |
commit | 0e3a3d553f0c5d832d016207a8a2e3f67195bbcc (patch) | |
tree | 64fb10a215489079d69d611dc2fd7dd2b8a5d375 /drivers/gpu/drm/rcar-du | |
parent | 686cd4fdf53c39fc85fc816fdfe839b34efdbbdf (diff) | |
download | linux-0e3a3d553f0c5d832d016207a8a2e3f67195bbcc.tar.xz |
drm: rcar-du: lvds: Add runtime PM
Add simple runtime PM suspend and resume functionality.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Diffstat (limited to 'drivers/gpu/drm/rcar-du')
-rw-r--r-- | drivers/gpu/drm/rcar-du/Kconfig | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_lvds.c | 43 |
2 files changed, 38 insertions, 6 deletions
diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig index e40242396fc9..dc5d663ed884 100644 --- a/drivers/gpu/drm/rcar-du/Kconfig +++ b/drivers/gpu/drm/rcar-du/Kconfig @@ -41,6 +41,7 @@ config DRM_RCAR_USE_LVDS config DRM_RCAR_LVDS def_tristate DRM_RCAR_DU depends on DRM_RCAR_USE_LVDS + depends on PM select DRM_KMS_HELPER select DRM_PANEL diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c index 81a060c2fe3f..7cf515e43079 100644 --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c @@ -16,6 +16,7 @@ #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/sys_soc.h> @@ -316,8 +317,8 @@ int rcar_lvds_pclk_enable(struct drm_bridge *bridge, unsigned long freq) dev_dbg(lvds->dev, "enabling LVDS PLL, freq=%luHz\n", freq); - ret = clk_prepare_enable(lvds->clocks.mod); - if (ret < 0) + ret = pm_runtime_resume_and_get(lvds->dev); + if (ret) return ret; __rcar_lvds_pll_setup_d3_e3(lvds, freq, true); @@ -337,7 +338,7 @@ void rcar_lvds_pclk_disable(struct drm_bridge *bridge) rcar_lvds_write(lvds, LVDPLLCR, 0); - clk_disable_unprepare(lvds->clocks.mod); + pm_runtime_put_sync(lvds->dev); } EXPORT_SYMBOL_GPL(rcar_lvds_pclk_disable); @@ -396,8 +397,8 @@ static void __rcar_lvds_atomic_enable(struct drm_bridge *bridge, u32 lvdcr0; int ret; - ret = clk_prepare_enable(lvds->clocks.mod); - if (ret < 0) + ret = pm_runtime_resume_and_get(lvds->dev); + if (ret) return; /* Enable the companion LVDS encoder in dual-link mode. */ @@ -551,7 +552,7 @@ static void rcar_lvds_atomic_disable(struct drm_bridge *bridge, lvds->companion->funcs->atomic_disable(lvds->companion, old_bridge_state); - clk_disable_unprepare(lvds->clocks.mod); + pm_runtime_put_sync(lvds->dev); } static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge, @@ -844,6 +845,8 @@ static int rcar_lvds_probe(struct platform_device *pdev) if (ret < 0) return ret; + pm_runtime_enable(&pdev->dev); + drm_bridge_add(&lvds->bridge); return 0; @@ -855,6 +858,8 @@ static int rcar_lvds_remove(struct platform_device *pdev) drm_bridge_remove(&lvds->bridge); + pm_runtime_disable(&pdev->dev); + return 0; } @@ -913,11 +918,37 @@ static const struct of_device_id rcar_lvds_of_table[] = { MODULE_DEVICE_TABLE(of, rcar_lvds_of_table); +static int rcar_lvds_runtime_suspend(struct device *dev) +{ + struct rcar_lvds *lvds = dev_get_drvdata(dev); + + clk_disable_unprepare(lvds->clocks.mod); + + return 0; +} + +static int rcar_lvds_runtime_resume(struct device *dev) +{ + struct rcar_lvds *lvds = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(lvds->clocks.mod); + if (ret < 0) + return ret; + + return 0; +} + +static const struct dev_pm_ops rcar_lvds_pm_ops = { + SET_RUNTIME_PM_OPS(rcar_lvds_runtime_suspend, rcar_lvds_runtime_resume, NULL) +}; + static struct platform_driver rcar_lvds_platform_driver = { .probe = rcar_lvds_probe, .remove = rcar_lvds_remove, .driver = { .name = "rcar-lvds", + .pm = &rcar_lvds_pm_ops, .of_match_table = rcar_lvds_of_table, }, }; |