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drm: bridge: dw-hdmi: Implement DRM bridge registration

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As an option for drivers not based on the component framework, register
the bridge with the DRM core with the DRM bridge API. Existing drivers
based on dw_hdmi_bind() and dw_hdmi_unbind() are not affected as those
functions are preserved with their current behaviour.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170117082910.27023-11-laurent.pinchart+renesas@ideasonboard.com
This commit is contained in:
Laurent Pinchart 2017-01-17 10:29:00 +02:00 committed by Archit Taneja
parent d2ae94ae84
commit 69497eb923
2 changed files with 83 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

112
drivers/gpu/drm/bridge/dw-hdmi.c
View File

@ -1836,24 +1836,9 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int dw_hdmi_register(struct drm_encoder *encoder, struct dw_hdmi *hdmi)
{
struct drm_bridge *bridge = &hdmi->bridge;
int ret;
bridge->driver_private = hdmi;
bridge->funcs = &dw_hdmi_bridge_funcs;
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
DRM_ERROR("Failed to initialize bridge with drm\n");
return -EINVAL;
}
return 0;
}
int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
const struct dw_hdmi_plat_data *plat_data)
static struct dw_hdmi *
__dw_hdmi_probe(struct platform_device *pdev,
const struct dw_hdmi_plat_data *plat_data)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
@ -1869,7 +1854,7 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
hdmi->plat_data = plat_data;
hdmi->dev = dev;
@ -1896,7 +1881,7 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
break;
default:
dev_err(dev, "reg-io-width must be 1 or 4\n");
return -EINVAL;
return ERR_PTR(-EINVAL);
}
ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
@ -1905,7 +1890,7 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
of_node_put(ddc_node);
if (!hdmi->ddc) {
dev_dbg(hdmi->dev, "failed to read ddc node\n");
return -EPROBE_DEFER;
return ERR_PTR(-EPROBE_DEFER);
}
} else {
@ -1956,8 +1941,10 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
initialize_hdmi_ih_mutes(hdmi);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
if (irq < 0) {
ret = irq;
goto err_iahb;
}
ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
dw_hdmi_irq, IRQF_SHARED,
@ -1988,11 +1975,11 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
HDMI_IH_PHY_STAT0);
ret = dw_hdmi_fb_registered(hdmi);
if (ret)
goto err_iahb;
hdmi->bridge.driver_private = hdmi;
hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
hdmi->bridge.of_node = pdev->dev.of_node;
ret = dw_hdmi_register(encoder, hdmi);
ret = dw_hdmi_fb_registered(hdmi);
if (ret)
goto err_iahb;
@ -2041,7 +2028,7 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
platform_set_drvdata(pdev, hdmi);
return 0;
return hdmi;
err_iahb:
if (hdmi->i2c) {
@ -2055,14 +2042,11 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
err_res:
i2c_put_adapter(hdmi->ddc);
return ret;
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(dw_hdmi_bind);
void dw_hdmi_unbind(struct device *dev)
static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);
if (hdmi->audio && !IS_ERR(hdmi->audio))
platform_device_unregister(hdmi->audio);
@ -2077,6 +2061,70 @@ void dw_hdmi_unbind(struct device *dev)
else
i2c_put_adapter(hdmi->ddc);
}
/* -----------------------------------------------------------------------------
* Probe/remove API, used from platforms based on the DRM bridge API.
*/
int dw_hdmi_probe(struct platform_device *pdev,
const struct dw_hdmi_plat_data *plat_data)
{
struct dw_hdmi *hdmi;
int ret;
hdmi = __dw_hdmi_probe(pdev, plat_data);
if (IS_ERR(hdmi))
return PTR_ERR(hdmi);
ret = drm_bridge_add(&hdmi->bridge);
if (ret < 0) {
__dw_hdmi_remove(hdmi);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(dw_hdmi_probe);
void dw_hdmi_remove(struct platform_device *pdev)
{
struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
drm_bridge_remove(&hdmi->bridge);
__dw_hdmi_remove(hdmi);
}
EXPORT_SYMBOL_GPL(dw_hdmi_remove);
/* -----------------------------------------------------------------------------
* Bind/unbind API, used from platforms based on the component framework.
*/
int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
const struct dw_hdmi_plat_data *plat_data)
{
struct dw_hdmi *hdmi;
int ret;
hdmi = __dw_hdmi_probe(pdev, plat_data);
if (IS_ERR(hdmi))
return PTR_ERR(hdmi);
ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
if (ret) {
dw_hdmi_remove(pdev);
DRM_ERROR("Failed to initialize bridge with drm\n");
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(dw_hdmi_bind);
void dw_hdmi_unbind(struct device *dev)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);
__dw_hdmi_remove(hdmi);
}
EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");

3
include/drm/bridge/dw_hdmi.h
View File

@ -56,6 +56,9 @@ struct dw_hdmi_plat_data {
struct drm_display_mode *mode);
};
int dw_hdmi_probe(struct platform_device *pdev,
const struct dw_hdmi_plat_data *plat_data);
void dw_hdmi_remove(struct platform_device *pdev);
void dw_hdmi_unbind(struct device *dev);
int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
const struct dw_hdmi_plat_data *plat_data);