On 19/08/2019 16:41, Hans Verkuil wrote:
> On 8/19/19 4:38 PM, Neil Armstrong wrote:
>> Hi Hans,
>>
>> On 19/08/2019 16:05, Hans Verkuil wrote:
>>> On 8/19/19 11:32 AM, Hans Verkuil wrote:
>>>> On 8/14/19 12:45 PM, Dariusz Marcinkiewicz wrote:
>>>>> Use the new cec_notifier_conn_(un)register() functions to
>>>>> (un)register the notifier for the HDMI connector, and fill in
>>>>> the cec_connector_info.
>>>>>
>>>>> Changes since v6:
>>>>> - move cec_notifier_conn_unregister to a bridge detach
>>>>> function,
>>>>> - add a mutex protecting a CEC notifier.
>>>>> Changes since v4:
>>>>> - typo fix
>>>>> Changes since v2:
>>>>> - removed unnecessary NULL check before a call to
>>>>> cec_notifier_conn_unregister,
>>>>> - use cec_notifier_phys_addr_invalidate to invalidate physical
>>>>> address.
>>>>> Changes since v1:
>>>>> Add memory barrier to make sure that the notifier
>>>>> becomes visible to the irq thread once it is fully
>>>>> constructed.
>>>>>
>>>>> Signed-off-by: Dariusz Marcinkiewicz <dar...@google.com>
>>>>
>>>> Acked-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
>>>
>>> Tested-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
>>
>> Did you test it on an Amlogic platform ? If yes, I don't have to !
>
> Yes, tested on my khadas VIM2 (modified a bit to fix the issue where
> the CEC physical address wasn't invalidated correctly as discussed here
> earlier).
Good, thanks.
Reviewed-by: Neil Armstrong <narmstr...@baylibre.com>
>
> Regards,
>
> Hans
>
>>
>> Neil
>>
>>>
>>> Regards,
>>>
>>> Hans
>>>
>>>>
>>>> Regards,
>>>>
>>>> Hans
>>>>
>>>>> ---
>>>>> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 45 +++++++++++++++--------
>>>>> 1 file changed, 30 insertions(+), 15 deletions(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>>>> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>>>> index 83b94b66e464e..55162c9092f71 100644
>>>>> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>>>> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>>>> @@ -190,6 +190,7 @@ struct dw_hdmi {
>>>>> void (*enable_audio)(struct dw_hdmi *hdmi);
>>>>> void (*disable_audio)(struct dw_hdmi *hdmi);
>>>>>
>>>>> + struct mutex cec_notifier_mutex;
>>>>> struct cec_notifier *cec_notifier;
>>>>> };
>>>>>
>>>>> @@ -2194,6 +2195,8 @@ 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;
>>>>> + struct cec_notifier *notifier;
>>>>>
>>>>> connector->interlace_allowed = 1;
>>>>> connector->polled = DRM_CONNECTOR_POLL_HPD;
>>>>> @@ -2207,9 +2210,29 @@ static int dw_hdmi_bridge_attach(struct drm_bridge
>>>>> *bridge)
>>>>>
>>>>> drm_connector_attach_encoder(connector, encoder);
>>>>>
>>>>> + cec_fill_conn_info_from_drm(&conn_info, connector);
>>>>> +
>>>>> + notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
>>>>> + if (!notifier)
>>>>> + return -ENOMEM;
>>>>> +
>>>>> + mutex_lock(&hdmi->cec_notifier_mutex);
>>>>> + hdmi->cec_notifier = notifier;
>>>>> + mutex_unlock(&hdmi->cec_notifier_mutex);
>>>>> +
>>>>> return 0;
>>>>> }
>>>>>
>>>>> +static void dw_hdmi_bridge_detach(struct drm_bridge *bridge)
>>>>> +{
>>>>> + struct dw_hdmi *hdmi = bridge->driver_private;
>>>>> +
>>>>> + mutex_lock(&hdmi->cec_notifier_mutex);
>>>>> + cec_notifier_conn_unregister(hdmi->cec_notifier);
>>>>> + hdmi->cec_notifier = NULL;
>>>>> + mutex_unlock(&hdmi->cec_notifier_mutex);
>>>>> +}
>>>>> +
>>>>> static enum drm_mode_status
>>>>> dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
>>>>> const struct drm_display_mode *mode)
>>>>> @@ -2266,6 +2289,7 @@ static void dw_hdmi_bridge_enable(struct drm_bridge
>>>>> *bridge)
>>>>>
>>>>> static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
>>>>> .attach = dw_hdmi_bridge_attach,
>>>>> + .detach = dw_hdmi_bridge_detach,
>>>>> .enable = dw_hdmi_bridge_enable,
>>>>> .disable = dw_hdmi_bridge_disable,
>>>>> .mode_set = dw_hdmi_bridge_mode_set,
>>>>> @@ -2373,9 +2397,11 @@ static irqreturn_t dw_hdmi_irq(int irq, void
>>>>> *dev_id)
>>>>> phy_stat & HDMI_PHY_HPD,
>>>>> phy_stat & HDMI_PHY_RX_SENSE);
>>>>>
>>>>> - if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
>>>>> - cec_notifier_set_phys_addr(hdmi->cec_notifier,
>>>>> - CEC_PHYS_ADDR_INVALID);
>>>>> + if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
>>>>> + mutex_lock(&hdmi->cec_notifier_mutex);
>>>>> + cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
>>>>> + mutex_unlock(&hdmi->cec_notifier_mutex);
>>>>> + }
>>>>> }
>>>>>
>>>>> if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
>>>>> @@ -2561,6 +2587,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
>>>>>
>>>>> mutex_init(&hdmi->mutex);
>>>>> mutex_init(&hdmi->audio_mutex);
>>>>> + mutex_init(&hdmi->cec_notifier_mutex);
>>>>> spin_lock_init(&hdmi->audio_lock);
>>>>>
>>>>> ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
>>>>> @@ -2693,12 +2720,6 @@ __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
>>>>> @@ -2796,9 +2817,6 @@ __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);
>>>>> @@ -2820,9 +2838,6 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
>>>>> /* Disable all interrupts */
>>>>> hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
>>>>>
>>>>> - if (hdmi->cec_notifier)
>>>>> - cec_notifier_put(hdmi->cec_notifier);
>>>>> -
>>>>> clk_disable_unprepare(hdmi->iahb_clk);
>>>>> clk_disable_unprepare(hdmi->isfr_clk);
>>>>> if (hdmi->cec_clk)
>>>>>
>>>>
>>>
>>
>
