linux-kernel - Re: [PATCH v2 2/2] usb: typec: qcom-pmic-typec: register drm

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Date:   Mon, 10 Jul 2023 12:04:31 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 2/2] usb: typec: qcom-pmic-typec: register drm_bridge

On 10.07.2023 12:02, Bryan O'Donoghue wrote:
> On 09/07/2023 21:13, Dmitry Baryshkov wrote:
>> The current approach to handling DP on bridge-enabled platforms requires
>> a chain of DP bridges up to the USB-C connector. Register a last DRM
>> bridge for such chain.
>>
>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>> ---
>>   drivers/usb/typec/tcpm/Kconfig                |  1 +
>>   drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c | 39 +++++++++++++++++++
>>   2 files changed, 40 insertions(+)
>>
>> diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
>> index 5d393f520fc2..0b2993fef564 100644
>> --- a/drivers/usb/typec/tcpm/Kconfig
>> +++ b/drivers/usb/typec/tcpm/Kconfig
>> @@ -79,6 +79,7 @@ config TYPEC_WCOVE
>>   config TYPEC_QCOM_PMIC
>>       tristate "Qualcomm PMIC USB Type-C Port Controller Manager driver"
>>       depends on ARCH_QCOM || COMPILE_TEST
>> +    depends on DRM || DRM=n
>>       help
>>         A Type-C port and Power Delivery driver which aggregates two
>>         discrete pieces of silicon in the PM8150b PMIC block: the
>> diff --git a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
>> index a905160dd860..0722fb8d75c4 100644
>> --- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
>> +++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
>> @@ -17,6 +17,9 @@
>>   #include <linux/usb/role.h>
>>   #include <linux/usb/tcpm.h>
>>   #include <linux/usb/typec_mux.h>
>> +
>> +#include <drm/drm_bridge.h>
>> +
>>   #include "qcom_pmic_typec_pdphy.h"
>>   #include "qcom_pmic_typec_port.h"
>>   @@ -33,6 +36,9 @@ struct pmic_typec {
>>       struct pmic_typec_port    *pmic_typec_port;
>>       bool            vbus_enabled;
>>       struct mutex        lock;        /* VBUS state serialization */
>> +#ifdef CONFIG_DRM
>> +    struct drm_bridge    bridge;
>> +#endif
> 
> IMO there's no reason to ifdef the structure. Its up to you if you want to change it nor not, I have no strong feelings about it.
+1, there's no ifdefs in the drm_bridge.h header that would make this not compile

Konrad
> 
> Acked-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> 
> ---
> bod