[PATCH 3/3] drm/bridge/adv7511: enable CEC connector info
Hans Verkuil
hverkuil-cisco at xs4all.nl
Mon Aug 26 10:16:36 UTC 2019
On 8/26/19 12:13 PM, Laurent Pinchart wrote:
> Hi Hans,
>
> On Mon, Aug 26, 2019 at 11:01:40AM +0200, Hans Verkuil wrote:
>> On 8/23/19 9:01 PM, Laurent Pinchart wrote:
>>> (And CC'ing Andrzej Hajda and Neil Armstrong as the new DRM bridge
>>> maintainers, as well as Boris Brezillon, to make sure they're aware of
>>> the problem)
>>>
>>> I would really appreciate if we could delay merging this series and
>>> other similar changes until we find a proper solution.
>>>
>>> On Fri, Aug 23, 2019 at 09:58:47PM +0300, Laurent Pinchart wrote:
>>>> On Fri, Aug 23, 2019 at 01:24:27PM +0200, Hans Verkuil wrote:
>>>>> Set the connector info to help userspace associate the CEC adapter
>>>>> with the HDMI connector.
>>>>>
>>>>> This required that the cec initialization and unregistering the
>>>>> CEC adapter takes place in the bridge attach and detach ops.
>>>>>
>>>>> Tested on an R-Car Koelsch board.
>>>>>
>>>>> Signed-off-by: Hans Verkuil <hverkuil-cisco at xs4all.nl>
>>>>> Tested-by: Hans Verkuil <hverkuil-cisco at xs4all.nl>
>>>>> ---
>>>>> drivers/gpu/drm/bridge/adv7511/adv7511_cec.c | 7 ++++++-
>>>>> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 22 ++++++++++----------
>>>>> 2 files changed, 17 insertions(+), 12 deletions(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
>>>>> index a20a45c0b353..accf5e232396 100644
>>>>> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
>>>>> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
>>>>> @@ -302,6 +302,7 @@ static int adv7511_cec_parse_dt(struct device *dev, struct adv7511 *adv7511)
>>>>>
>>>>> int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
>>>>> {
>>>>> + struct cec_connector_info conn_info;
>>>>> unsigned int offset = adv7511->type == ADV7533 ?
>>>>> ADV7533_REG_CEC_OFFSET : 0;
>>>>> int ret = adv7511_cec_parse_dt(dev, adv7511);
>>>>> @@ -310,7 +311,8 @@ int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
>>>>> goto err_cec_parse_dt;
>>>>>
>>>>> adv7511->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
>>>>> - adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS);
>>>>> + adv7511, dev_name(dev),
>>>>> + CEC_CAP_DEFAULTS | CEC_CAP_CONNECTOR_INFO, ADV7511_MAX_ADDRS);
>>>>> if (IS_ERR(adv7511->cec_adap)) {
>>>>> ret = PTR_ERR(adv7511->cec_adap);
>>>>> goto err_cec_alloc;
>>>>> @@ -331,6 +333,9 @@ int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
>>>>> ADV7511_REG_CEC_CLK_DIV + offset,
>>>>> ((adv7511->cec_clk_freq / 750000) - 1) << 2);
>>>>>
>>>>> + cec_fill_conn_info_from_drm(&conn_info, &adv7511->connector);
>>>>> + cec_s_conn_info(adv7511->cec_adap, &conn_info);
>>>>
>>>> I'm painfully trying to decouple bridges and connectors, if we keep
>>>> merging patches that go in the opposite direction, I'll never manage to
>>>> complete this :-(
>>>>
>>>> Bridges are moving to a model where they won't create connectors
>>>> themselves, so any new access to drm_connector contained in a bridge
>>>> structure is a no-go I'm afraid (I'm replying to this patch as I know
>>>> this driver best, but this comment applies to the other two patches in
>>>> the series as well).
>>>>
>>>> Here's what I wrote in a private e-mail, regarding similar changes for
>>>> the omapdrm driver.
>>>>
>>>> --------
>>>> Please have a look at "[PATCH 00/60] drm/omap: Replace custom display
>>>> drivers with drm_bridge and drm_panel", available in a new version at
>>>>
>>>> git://linuxtv.org/pinchartl/media.git omapdrm/bridge/devel
>>>>
>>>> (I will post v2 soon)
>>>>
>>>> The patches show the direction the omapdrm driver is taking. The goal is
>>>> to decouple connectors from bridges, which I'm afraid will have an
>>>> impact on associating drm_connector with a CEC adapter. This should be
>>>> implemented through new drm_bridge operations, as bridges, when created,
>>>> will not create drm_connector anymore.
>>>>
>>>> I've solved a similar problem related to associating DRM connectors with
>>>> an I2C adapter for DDC. Please see the drm_bridge_connector_init()
>>>> function and how the DDC adapter is handled. Something similar could be
>>>> done for CEC.
>>>> --------
>>>>
>>>> Since then v2 has been posted ("[PATCH v2 00/50] drm/omap: Replace
>>>> custom display drivers with drm_bridge and drm_panel") and v3 is in
>>>> preparation.
>>>>
>>>> So, please, let's both go in the right direction and solve the problem
>>>> properly for CEC.
>>
>> I don't mind waiting one kernel cycle, but not longer. This CEC feature is
>> ready to be rolled out, so I am not willing to wait a long time for all
>> of this to land. I can help test CEC once you are going to roll this out
>> for all drm drivers (except for the sti SoC, since I don't have any HW).
>>
>> So do you think this will land for 5.5? If yes, then I'll wait.
>
> I really hope so !
>
> Would you be able to try to implement this feature for the OMAP4 based
> on my omapdrm/bridge/devel branch ? The other drivers should follow the
> same path, so that would be a good exercise.
I can try that later this week.
Regards,
Hans
>
>>>>> +
>>>>> ret = cec_register_adapter(adv7511->cec_adap, dev);
>>>>> if (ret)
>>>>> goto err_cec_register;
>>>>> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>>>>> index f6d2681f6927..bbcb996c4d4f 100644
>>>>> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>>>>> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>>>>> @@ -881,14 +881,24 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge)
>>>>> regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
>>>>> ADV7511_INT0_HPD);
>>>>>
>>>>> + if (!ret)
>>>>> + ret = adv7511_cec_init(&adv->i2c_main->dev, adv);
>>>>> return ret;
>>>>> }
>>>>>
>>>>> +static void adv7511_bridge_detach(struct drm_bridge *bridge)
>>>>> +{
>>>>> + struct adv7511 *adv = bridge_to_adv7511(bridge);
>>>>> +
>>>>> + cec_unregister_adapter(adv->cec_adap);
>>>>> +}
>>>>> +
>>>>> static const struct drm_bridge_funcs adv7511_bridge_funcs = {
>>>>> .enable = adv7511_bridge_enable,
>>>>> .disable = adv7511_bridge_disable,
>>>>> .mode_set = adv7511_bridge_mode_set,
>>>>> .attach = adv7511_bridge_attach,
>>>>> + .detach = adv7511_bridge_detach,
>>>>> };
>>>>>
>>>>> /* -----------------------------------------------------------------------------
>>>>> @@ -1202,7 +1212,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
>>>>> IRQF_ONESHOT, dev_name(dev),
>>>>> adv7511);
>>>>> if (ret)
>>>>> - goto err_unregister_cec;
>>>>> + goto err_i2c_unregister_packet;
>>>>> }
>>>>>
>>>>> adv7511_power_off(adv7511);
>>>>> @@ -1212,10 +1222,6 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
>>>>> if (adv7511->type == ADV7511)
>>>>> adv7511_set_link_config(adv7511, &link_config);
>>>>>
>>>>> - ret = adv7511_cec_init(dev, adv7511);
>>>>> - if (ret)
>>>>> - goto err_unregister_cec;
>>>>> -
>>>>> adv7511->bridge.funcs = &adv7511_bridge_funcs;
>>>>> adv7511->bridge.of_node = dev->of_node;
>>>>>
>>>>> @@ -1224,10 +1230,6 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
>>>>> adv7511_audio_init(dev, adv7511);
>>>>> return 0;
>>>>>
>>>>> -err_unregister_cec:
>>>>> - i2c_unregister_device(adv7511->i2c_cec);
>>>>> - if (adv7511->cec_clk)
>>>>> - clk_disable_unprepare(adv7511->cec_clk);
>>>>> err_i2c_unregister_packet:
>>>>> i2c_unregister_device(adv7511->i2c_packet);
>>>>> err_i2c_unregister_edid:
>>>>> @@ -1254,8 +1256,6 @@ static int adv7511_remove(struct i2c_client *i2c)
>>>>>
>>>>> adv7511_audio_exit(adv7511);
>>>>>
>>>>> - cec_unregister_adapter(adv7511->cec_adap);
>>>>> -
>>>>> i2c_unregister_device(adv7511->i2c_packet);
>>>>> i2c_unregister_device(adv7511->i2c_edid);
>>>>>
>
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