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drm/exynos/hdmi: add bridge support

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On TM2/TM2e platforms HDMI output is connected to MHL bridge
SiI8620. To allow configure UltraHD modes on the bridge
and to eliminate unsupported modes this bridge should be
attached to drm_encoder implemented in exynos_hdmi.

Changelog v1:
- fix drm_attach_bridge argument.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2017-02-01 09:29:14 +01:00 committed by Inki Dae
parent 1514d50b7a
commit aa18157016
1 changed files with 46 additions and 10 deletions
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56
drivers/gpu/drm/exynos/exynos_hdmi.c
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@ -35,6 +35,7 @@
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/hdmi.h>
#include <linux/component.h>
#include <linux/mfd/syscon.h>
@ -133,6 +134,7 @@ struct hdmi_context {
struct regulator_bulk_data regul_bulk[ARRAY_SIZE(supply)];
struct regulator *reg_hdmi_en;
struct exynos_drm_clk phy_clk;
struct drm_bridge *bridge;
};
static inline struct hdmi_context *encoder_to_hdmi(struct drm_encoder *e)
@ -922,7 +924,15 @@ static int hdmi_create_connector(struct drm_encoder *encoder)
drm_connector_register(connector);
drm_mode_connector_attach_encoder(connector, encoder);
return 0;
if (hdata->bridge) {
encoder->bridge = hdata->bridge;
hdata->bridge->encoder = encoder;
ret = drm_bridge_attach(encoder, hdata->bridge, NULL);
if (ret)
DRM_ERROR("Failed to attach bridge\n");
}
return ret;
}
static bool hdmi_mode_fixup(struct drm_encoder *encoder,
@ -1591,6 +1601,31 @@ static void hdmiphy_clk_enable(struct exynos_drm_clk *clk, bool enable)
hdmiphy_disable(hdata);
}
static int hdmi_bridge_init(struct hdmi_context *hdata)
{
struct device *dev = hdata->dev;
struct device_node *ep, *np;
ep = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);
if (!ep)
return 0;
np = of_graph_get_remote_port_parent(ep);
of_node_put(ep);
if (!np) {
DRM_ERROR("failed to get remote port parent");
return -EINVAL;
}
hdata->bridge = of_drm_find_bridge(np);
of_node_put(np);
if (!hdata->bridge)
return -EPROBE_DEFER;
return 0;
}
static int hdmi_resources_init(struct hdmi_context *hdata)
{
struct device *dev = hdata->dev;
@ -1630,17 +1665,18 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
hdata->reg_hdmi_en = devm_regulator_get_optional(dev, "hdmi-en");
if (PTR_ERR(hdata->reg_hdmi_en) == -ENODEV)
return 0;
if (PTR_ERR(hdata->reg_hdmi_en) != -ENODEV) {
if (IS_ERR(hdata->reg_hdmi_en))
return PTR_ERR(hdata->reg_hdmi_en);
if (IS_ERR(hdata->reg_hdmi_en))
return PTR_ERR(hdata->reg_hdmi_en);
ret = regulator_enable(hdata->reg_hdmi_en);
if (ret) {
DRM_ERROR("failed to enable hdmi-en regulator\n");
return ret;
}
}
ret = regulator_enable(hdata->reg_hdmi_en);
if (ret)
DRM_ERROR("failed to enable hdmi-en regulator\n");
return ret;
return hdmi_bridge_init(hdata);
}
static struct of_device_id hdmi_match_types[] = {