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From: Stanimir Varbanov <stanimir.varbanov@linaro.org>
To: Vikash Garodia <vgarodia@codeaurora.org>,
	hverkuil@xs4all.nl, mchehab@kernel.org, andy.gross@linaro.org,
	bjorn.andersson@linaro.org, linux-media@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-soc@vger.kernel.org, acourbot@google.com
Subject: Re: [PATCH 3/4] venus: add check to make scm calls
Date: Tue, 22 May 2018 23:57:53 +0300	[thread overview]
Message-ID: <f9f99014-526d-d23b-6eaf-c04e45bef10a@linaro.org> (raw)
In-Reply-To: <20180522195026.GA16550@jcrouse-lnx.qualcomm.com>

Hi Jordan,

On 22.05.2018 22:50, Jordan Crouse wrote:
> On Tue, May 22, 2018 at 04:04:51PM +0300, Stanimir Varbanov wrote:
>> Hi Vikash,
>>
>> On 05/17/2018 02:32 PM, Vikash Garodia wrote:
>>> In order to invoke scm calls, ensure that the platform
>>> has the required support to invoke the scm calls in
>>> secure world. This code is in preparation to add PIL
>>> functionality in venus driver.
>>>
>>> Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
>>> ---
>>>   drivers/media/platform/qcom/venus/hfi_venus.c | 26 +++++++++++++++++++-------
>>>   1 file changed, 19 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
>>> index f61d34b..9bcce94 100644
>>> --- a/drivers/media/platform/qcom/venus/hfi_venus.c
>>> +++ b/drivers/media/platform/qcom/venus/hfi_venus.c
>>> @@ -27,6 +27,7 @@
>>>   #include "hfi_msgs.h"
>>>   #include "hfi_venus.h"
>>>   #include "hfi_venus_io.h"
>>> +#include "firmware.h"
>>>   
>>>   #define HFI_MASK_QHDR_TX_TYPE		0xff000000
>>>   #define HFI_MASK_QHDR_RX_TYPE		0x00ff0000
>>> @@ -570,13 +571,19 @@ static int venus_halt_axi(struct venus_hfi_device *hdev)
>>>   static int venus_power_off(struct venus_hfi_device *hdev)
>>>   {
>>>   	int ret;
>>> +	void __iomem *reg_base;
>>>   
>>>   	if (!hdev->power_enabled)
>>>   		return 0;
>>>   
>>> -	ret = qcom_scm_set_remote_state(TZBSP_VIDEO_STATE_SUSPEND, 0);
>>> -	if (ret)
>>> -		return ret;
>>> +	if (qcom_scm_is_available()) {
>>> +		ret = qcom_scm_set_remote_state(TZBSP_VIDEO_STATE_SUSPEND, 0);
>>
>> I think it will be clearer if we abstract qcom_scm_set_remote_state to
>> something like venus_set_state(SUSPEND|RESUME) in firmware.c and export
>> the functions to be used here.
> 
> This specific function is a little odd because the SCM function got overloaded
> and used as a hardware workaround for the adreno a5xx zap shader.
> 
> When we added it for the GPU we knew the day would come that we would need it
> for Venus so we kept the name purposely generic. You can wrap if if you want
> but just know that there are other non video entities out there using it.

Sorry I wasn't clear, by abstract it I meant to introduce a new 
venus_set_state function in venus/firmware.c where we'll select 
tz/non-tz functions for suspend / resume depending on the configuration.

regards,
Stan

  reply	other threads:[~2018-05-22 20:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-17 11:32 [PATCH 0/4] Venus updates - PIL Vikash Garodia
2018-05-17 11:32 ` [PATCH 1/4] soc: qcom: mdt_loader: Add check to make scm calls Vikash Garodia
2018-05-17 15:50   ` Jordan Crouse
2018-05-18  5:28   ` Bjorn Andersson
2018-05-18  7:18     ` Vikash Garodia
2018-05-17 11:32 ` [PATCH 2/4] media: venus: add a routine to reset ARM9 Vikash Garodia
2018-05-17 15:57   ` Jordan Crouse
2018-05-17 11:32 ` [PATCH 3/4] venus: add check to make scm calls Vikash Garodia
2018-05-22 13:04   ` Stanimir Varbanov
2018-05-22 19:50     ` Jordan Crouse
2018-05-22 20:57       ` Stanimir Varbanov [this message]
2018-05-23  5:30         ` Vikash Garodia
2018-05-17 11:32 ` [PATCH 4/4] media: venus: add PIL support Vikash Garodia
2018-05-18  0:40   ` Trilok Soni
2018-05-18 12:20     ` Vikash Garodia
2018-05-22 13:02   ` Stanimir Varbanov
2018-05-22 15:52     ` Stanimir Varbanov
2018-06-01  6:53     ` Vikash Garodia

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