[PATCH v7 8/9] drm: dw-hdmi: use cec_notifier_conn_(un)register
Neil Armstrong
narmstrong at baylibre.com
Tue Aug 20 07:48:47 UTC 2019
On 19/08/2019 16:47, Neil Armstrong wrote:
> 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 <darekm at google.com>
>>>>>
>>>>> Acked-by: Hans Verkuil <hverkuil-cisco at xs4all.nl>
>>>>
>>>> Tested-by: Hans Verkuil <hverkuil-cisco at 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 <narmstrong at 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)
>>>>>>
>>>>>
>>>>
>>>
>>
>
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