From 62a8ea5d957ce3b124c91bc520aae80d0a72b33e Mon Sep 17 00:00:00 2001
From: Liu Ying <victor.liu@nxp.com>
Date: Fri, 13 Oct 2017 13:22:16 +0800
Subject: [PATCH] MLK-16581-7 drm/imx: ldb: Add system power management support
This patch adds system power management support for imx-ldb drm driver
by proper PHY power/exit/init handling where necessary and pixel link
re-initialization in the resume operation. The driver depends on the
imx-drm core driver to handle ldb bridge power management operations.
Signed-off-by: Liu Ying <victor.liu@nxp.com>
(cherry picked from commit 1e83202addd99f1b064a346c00cda75cdd611fd0)
---
drivers/gpu/drm/imx/imx-ldb.c | 38 +++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 6db1e9fc963739..d935cf8c111341 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -1299,12 +1299,50 @@ static int imx_ldb_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int imx_ldb_suspend(struct device *dev)
+{
+ struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
+ struct imx_ldb_channel *channel;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ channel = &imx_ldb->channel[i];
+
+ if (channel->phy_is_on)
+ phy_power_off(channel->phy);
+
+ phy_exit(channel->phy);
+ }
+
+ return 0;
+}
+
+static int imx_ldb_resume(struct device *dev)
+{
+ struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
+ int i;
+
+ if (imx_ldb->visible_phy)
+ for (i = 0; i < 2; i++)
+ phy_init(imx_ldb->channel[i].phy);
+
+ if (imx_ldb->pixel_link_init_quirks)
+ ldb_pixel_link_init(imx_ldb->id);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(imx_ldb_pm_ops, imx_ldb_suspend, imx_ldb_resume);
+
static struct platform_driver imx_ldb_driver = {
.probe = imx_ldb_probe,
.remove = imx_ldb_remove,
.driver = {
.of_match_table = imx_ldb_dt_ids,
.name = DRIVER_NAME,
+ .pm = &imx_ldb_pm_ops,
},
};
--
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