[PATCH] drm/rockchip: analogix_dp: add supports for regulators in edp IP

[Randy Li]

I found if eDP_AVDD_1V0 and eDP_AVDD_1V8 are not been power at
RK3288, once trying to enable the pclk clock, the kernel would dead.
This patch would try to enable them first. The eDP_AVDD_1V8 more
likely to be applied to eDP phy, but I have no time to confirmed
it yet.

Signed-off-by: Randy Li <ayaka at soulik.info>
---
 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c 
b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 8548e82..6bf0441 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -17,6 +17,7 @@
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 #include <linux/clk.h>

@@ -70,6 +71,7 @@ struct rockchip_dp_device {
        struct clk               *grfclk;
        struct regmap            *grf;
        struct reset_control     *rst;
+       struct regulator_bulk_data supplies[2];

        struct work_struct       psr_work;
        spinlock_t               psr_lock;
@@ -146,6 +148,13 @@ static int rockchip_dp_poweron(struct 
analogix_dp_plat_data *plat_data)

        cancel_work_sync(&dp->psr_work);

+       ret = regulator_bulk_enable(ARRAY_SIZE(dp->supplies),
+                       dp->supplies);
+       if (ret) {
+               dev_err(dp->dev, "failed to enable vdd supply %d\n", ret);
+               return ret;
+       }
+
        ret = clk_prepare_enable(dp->pclk);
        if (ret < 0) {
                dev_err(dp->dev, "failed to enable pclk %d\n", ret);
@@ -168,6 +177,9 @@ static int rockchip_dp_powerdown(struct 
analogix_dp_plat_data *plat_data)

        clk_disable_unprepare(dp->pclk);

+       regulator_bulk_disable(ARRAY_SIZE(dp->supplies),
+                       dp->supplies);
+
        return 0;
 }

@@ -323,6 +335,19 @@ static int rockchip_dp_init(struct rockchip_dp_device *dp)
                return PTR_ERR(dp->rst);
        }

+       dp->supplies[0].supply = "vcc";
+       dp->supplies[1].supply = "vccio";
+       ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dp->supplies),
+                       dp->supplies);
+       if (ret < 0) {
+               dev_err(dev, "failed to get regulators: %d\n", ret);
+       }
+       ret = regulator_bulk_enable(ARRAY_SIZE(dp->supplies),
+                       dp->supplies);
+       if (ret < 0) {
+               dev_err(dev, "failed to enable regulators: %d\n", ret);
+       }
+
        ret = clk_prepare_enable(dp->pclk);
        if (ret < 0) {
                dev_err(dp->dev, "failed to enable pclk %d\n", ret);
-- 
2.7.4