github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-03 12:03:54 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm: rcar-du: lvds: Add runtime PM

Browse Source 
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>
This commit is contained in:
Tomi Valkeinen 2023-01-23 12:47:37 +02:00 committed by Laurent Pinchart
parent 686cd4fdf5
commit 0e3a3d553f
2 changed files with 38 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/rcar-du/Kconfig
View File

@ -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

43
drivers/gpu/drm/rcar-du/rcar_lvds.c
View File

@ -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,
},
};