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Subject[PATCH v7 2/3] drm/bridge: dw-hdmi: pass connector info to the CEC adapter
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This patch makes dw-hdmi pass DRM connector info to a respective
CEC adapter. In order to be able to do that it delays creation of
the dw-hdmi-cec platform device until DRM connector is initialized.

Requires testing.

Changes since version v5:
- connector info is passed trough notifier, fixed CEC platform
device initialization

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 13 ++-
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 103 ++++++++++--------
2 files changed, 66 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
index 84fb7b6a0a5e0..64cc278f5a754 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
@@ -232,6 +232,7 @@ static void dw_hdmi_cec_del(void *data)
static int dw_hdmi_cec_probe(struct platform_device *pdev)
{
struct dw_hdmi_cec_data *data = dev_get_platdata(&pdev->dev);
+ const struct cec_connector_info *conn_info;
struct dw_hdmi_cec *cec;
int ret;

@@ -258,10 +259,16 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
dw_hdmi_write(cec, ~0, HDMI_IH_MUTE_CEC_STAT0);
dw_hdmi_write(cec, 0, HDMI_CEC_POLARITY);

+ cec->notify = cec_notifier_get(pdev->dev.parent);
+ if (!cec->notify)
+ return -ENOMEM;
+
+ conn_info = cec_notifier_get_conn_info(cec->notify);
+
cec->adap = cec_allocate_adapter(&dw_hdmi_cec_ops, cec, "dw_hdmi",
CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
CEC_CAP_RC | CEC_CAP_PASSTHROUGH,
- CEC_MAX_LOG_ADDRS, NULL);
+ CEC_MAX_LOG_ADDRS, conn_info);
if (IS_ERR(cec->adap))
return PTR_ERR(cec->adap);

@@ -281,10 +288,6 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
if (ret < 0)
return ret;

- cec->notify = cec_notifier_get(pdev->dev.parent);
- if (!cec->notify)
- return -ENOMEM;
-
ret = cec_register_adapter(cec->adap, pdev->dev.parent);
if (ret < 0) {
cec_notifier_put(cec->notify);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index ab7968c8f6a29..ed2f3e7e9c1cf 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -138,6 +138,8 @@ struct dw_hdmi {
struct drm_connector connector;
struct drm_bridge bridge;

+ int irq;
+
unsigned int version;

struct platform_device *audio;
@@ -189,6 +191,7 @@ struct dw_hdmi {
void (*enable_audio)(struct dw_hdmi *hdmi);
void (*disable_audio)(struct dw_hdmi *hdmi);

+ bool cec_configured;
struct cec_notifier *cec_notifier;
};

@@ -2113,11 +2116,35 @@ static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs =
.get_modes = dw_hdmi_connector_get_modes,
};

+static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->mutex);
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->mutex);
+ hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
+ .write = hdmi_writeb,
+ .read = hdmi_readb,
+ .enable = dw_hdmi_cec_enable,
+ .disable = dw_hdmi_cec_disable,
+};
+
static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
{
struct dw_hdmi *hdmi = bridge->driver_private;
struct drm_encoder *encoder = bridge->encoder;
struct drm_connector *connector = &hdmi->connector;
+ struct cec_connector_info conn_info;

connector->interlace_allowed = 1;
connector->polled = DRM_CONNECTOR_POLL_HPD;
@@ -2129,6 +2156,34 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)

drm_connector_attach_encoder(connector, encoder);

+ cec_fill_connector_info(&conn_info, connector);
+
+ hdmi->cec_notifier = cec_notifier_get_conn(hdmi->dev, NULL,
+ &conn_info);
+ if (!hdmi->cec_notifier)
+ return -ENOMEM;
+
+ if (hdmi->cec_configured) {
+ struct platform_device_info pdevinfo;
+ struct dw_hdmi_cec_data cec;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = hdmi->dev;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+
+ cec.hdmi = hdmi;
+ cec.ops = &dw_hdmi_cec_ops;
+ cec.irq = hdmi->irq;
+
+ pdevinfo.name = "dw-hdmi-cec";
+ pdevinfo.data = &cec;
+ pdevinfo.size_data = sizeof(cec);
+ pdevinfo.dma_mask = 0;
+
+ hdmi->cec = platform_device_register_full(&pdevinfo);
+
+ }
+
return 0;
}

@@ -2398,29 +2453,6 @@ static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
return -ENODEV;
}

-static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi)
-{
- mutex_lock(&hdmi->mutex);
- hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
- hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
- mutex_unlock(&hdmi->mutex);
-}
-
-static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi)
-{
- mutex_lock(&hdmi->mutex);
- hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
- hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
- mutex_unlock(&hdmi->mutex);
-}
-
-static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
- .write = hdmi_writeb,
- .read = hdmi_readb,
- .enable = dw_hdmi_cec_enable,
- .disable = dw_hdmi_cec_disable,
-};
-
static const struct regmap_config hdmi_regmap_8bit_config = {
.reg_bits = 32,
.val_bits = 8,
@@ -2443,7 +2475,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
struct device_node *np = dev->of_node;
struct platform_device_info pdevinfo;
struct device_node *ddc_node;
- struct dw_hdmi_cec_data cec;
struct dw_hdmi *hdmi;
struct resource *iores = NULL;
int irq;
@@ -2593,6 +2624,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
ret = irq;
goto err_iahb;
}
+ hdmi->irq = irq;

ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
dw_hdmi_irq, IRQF_SHARED,
@@ -2600,12 +2632,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
if (ret)
goto err_iahb;

- hdmi->cec_notifier = cec_notifier_get(dev);
- if (!hdmi->cec_notifier) {
- ret = -ENOMEM;
- goto err_iahb;
- }
-
/*
* To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
* N and cts values before enabling phy
@@ -2668,18 +2694,8 @@ __dw_hdmi_probe(struct platform_device *pdev,
hdmi->audio = platform_device_register_full(&pdevinfo);
}

- if (config0 & HDMI_CONFIG0_CEC) {
- cec.hdmi = hdmi;
- cec.ops = &dw_hdmi_cec_ops;
- cec.irq = irq;
-
- pdevinfo.name = "dw-hdmi-cec";
- pdevinfo.data = &cec;
- pdevinfo.size_data = sizeof(cec);
- pdevinfo.dma_mask = 0;
-
- hdmi->cec = platform_device_register_full(&pdevinfo);
- }
+ if (config0 & HDMI_CONFIG0_CEC)
+ hdmi->cec_configured = true;

/* Reset HDMI DDC I2C master controller and mute I2CM interrupts */
if (hdmi->i2c)
@@ -2693,9 +2709,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
hdmi->ddc = NULL;
}

- if (hdmi->cec_notifier)
- cec_notifier_put(hdmi->cec_notifier);
-
clk_disable_unprepare(hdmi->iahb_clk);
if (hdmi->cec_clk)
clk_disable_unprepare(hdmi->cec_clk);
--
2.18.1
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