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SubjectRe: [PATCH v3 4/7] drm/exynos/hdmi: add bridge support


2017년 02월 03일 15:38에 Inki Dae 이(가) 쓴 글:
>
>
> 2017년 02월 01일 17:29에 Andrzej Hajda 이(가) 쓴 글:
>> 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.
>>
>> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
>> ---
>> drivers/gpu/drm/exynos/exynos_hdmi.c | 56 +++++++++++++++++++++++++++++-------
>> 1 file changed, 46 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> index a73b192..41fb894 100644
>> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
>> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> @@ -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->dev, hdata->bridge);
>
> arguments of drm_bridge_attach function has been changed so fixed it - trivial thing.
> Applied it including other patches.

The argument was changed by below patch,
drm: bridge: Link encoder and bridge in core code

Thanks.

>
> Thanks,
> Inki Dae
>
>> + 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");
>> + ret = regulator_enable(hdata->reg_hdmi_en);
>> + if (ret) {
>> + DRM_ERROR("failed to enable hdmi-en regulator\n");
>> + return ret;
>> + }
>> + }
>>
>> - return ret;
>> + return hdmi_bridge_init(hdata);
>> }
>>
>> static struct of_device_id hdmi_match_types[] = {
>>

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