diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-07-01 12:10:06 +0400 |
|---|---|---|
| committer | Inki Dae <daeinki@gmail.com> | 2014-08-03 11:52:13 +0400 |
| commit | 05fdf98742e41e89816d115decaf478c28477ab9 (patch) | |
| tree | afcd1d1454243a9bc81542201e3963d1cb5e1ba9 /drivers/gpu/drm/exynos/exynos_hdmi.c | |
| parent | 8f589bba25201b4574ad56ff56b153b10595e3ef (diff) | |
| download | linux-05fdf98742e41e89816d115decaf478c28477ab9.tar.xz | |
drm/exynos: hdmi: make 'hdmi-en' regulator optional and keep it enabled
HDMI_EN regulator is additional regulator for providing voltage source
for DCC lines available on HDMI connector. When there is no power
provided for DDC epprom, some TV-sets do not pulls up HPD (hot plug
detect) line, what causes HDMI block to stay turned off. This patch
enables HDMI_EN regulator (if available) on driver probe and keep it
enabled all the time to let TV-set correctly signal HPD event.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_hdmi.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 738f2d7e16a1..9ec787f8529a 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -84,6 +84,7 @@ struct hdmi_resources { struct clk *sclk_hdmiphy; struct clk *mout_hdmi; struct regulator_bulk_data *regul_bulk; + struct regulator *reg_hdmi_en; int regul_count; }; @@ -2167,7 +2168,6 @@ static int hdmi_resources_init(struct hdmi_context *hdata) struct device *dev = hdata->dev; struct hdmi_resources *res = &hdata->res; static char *supply[] = { - "hdmi-en", "vdd", "vdd_osc", "vdd_pll", @@ -2227,6 +2227,20 @@ static int hdmi_resources_init(struct hdmi_context *hdata) } res->regul_count = ARRAY_SIZE(supply); + res->reg_hdmi_en = devm_regulator_get(dev, "hdmi-en"); + if (IS_ERR(res->reg_hdmi_en) && PTR_ERR(res->reg_hdmi_en) != -ENOENT) { + DRM_ERROR("failed to get hdmi-en regulator\n"); + return PTR_ERR(res->reg_hdmi_en); + } + if (!IS_ERR(res->reg_hdmi_en)) { + ret = regulator_enable(res->reg_hdmi_en); + if (ret) { + DRM_ERROR("failed to enable hdmi-en regulator\n"); + return ret; + } + } else + res->reg_hdmi_en = NULL; + return ret; fail: DRM_ERROR("HDMI resource init - failed\n"); @@ -2493,6 +2507,9 @@ static int hdmi_remove(struct platform_device *pdev) cancel_delayed_work_sync(&hdata->hotplug_work); + if (hdata->res.reg_hdmi_en) + regulator_disable(hdata->res.reg_hdmi_en); + put_device(&hdata->hdmiphy_port->dev); put_device(&hdata->ddc_adpt->dev); |