diff options
| author |   Neil Armstrong <narmstrong@baylibre.com> | 2017-12-06 12:54:27 +0100 |
|---|---|---|
| committer | Neil Armstrong <narmstrong@baylibre.com> | 2017-12-08 10:43:40 +0100 |
| commit | 161a803fe32d2b8c7a54d9819e3f2dc222f42e22 (patch) | |
| tree | 1da6ccb8a41ef09d023e46765b1913bc7428ee89 /drivers/gpu/drm/meson | |
| parent | dt-bindings: display: amlogic, meson-dw-hdmi: Add optional HDMI 5V regulator (diff) | |
| download | linux-dev-161a803fe32d2b8c7a54d9819e3f2dc222f42e22.tar.xz linux-dev-161a803fe32d2b8c7a54d9819e3f2dc222f42e22.zip | |
drm/meson: dw_hdmi: Add support for an optional external 5V regulator
On reference boards and derivatives, the HDMI Logic is powered by an external
5V regulator.
This regulator was set by the Vendor U-Boot, add optional support for it.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1512561268-29806-4-git-send-email-narmstrong@baylibre.com
Diffstat (limited to 'drivers/gpu/drm/meson')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_dw_hdmi.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c index cef414466f9f..17de3afd98f6 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c @@ -23,6 +23,7 @@ #include <linux/of_graph.h> #include <linux/reset.h> #include <linux/clk.h> +#include <linux/regulator/consumer.h> #include <drm/drmP.h> #include <drm/drm_edid.h> @@ -137,6 +138,7 @@ struct meson_dw_hdmi { struct reset_control *hdmitx_phy; struct clk *hdmi_pclk; struct clk *venci_clk; + struct regulator *hdmi_supply; u32 irq_stat; }; #define encoder_to_meson_dw_hdmi(x) \ @@ -751,6 +753,17 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, dw_plat_data = &meson_dw_hdmi->dw_plat_data; encoder = &meson_dw_hdmi->encoder; + meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi"); + if (IS_ERR(meson_dw_hdmi->hdmi_supply)) { + if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER) + return -EPROBE_DEFER; + meson_dw_hdmi->hdmi_supply = NULL; + } else { + ret = regulator_enable(meson_dw_hdmi->hdmi_supply); + if (ret) + return ret; + } + meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev, "hdmitx_apb"); if (IS_ERR(meson_dw_hdmi->hdmitx_apb)) { |