linux-kernel - Re: [PATCH 06/33] iris: vidc: define video core and instance context

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Date:   Tue, 15 Aug 2023 00:34:33 +0530
From:   Dikshita Agarwal <quic_dikshita@...cinc.com>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        <stanimir.k.varbanov@...il.com>, <agross@...nel.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>,
        <mchehab@...nel.org>, <hans.verkuil@...co.com>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH 06/33] iris: vidc: define video core and instance context



On 7/28/2023 9:17 PM, Bryan O'Donoghue wrote:
> On 28/07/2023 14:23, Vikash Garodia wrote:
>> +#define call_iris_op(d, op, ...)            \
>> +    (((d) && (d)->iris_ops && (d)->iris_ops->op) ? \
>> +    ((d)->iris_ops->op(__VA_ARGS__)) : 0)
>> +
>> +struct msm_vidc_iris_ops {
>> +    int (*boot_firmware)(struct msm_vidc_core *core);
>> +    int (*raise_interrupt)(struct msm_vidc_core *core);
>> +    int (*clear_interrupt)(struct msm_vidc_core *core);
>> +    int (*prepare_pc)(struct msm_vidc_core *core);
>> +    int (*power_on)(struct msm_vidc_core *core);
>> +    int (*power_off)(struct msm_vidc_core *core);
>> +    int (*watchdog)(struct msm_vidc_core *core, u32 intr_status);
>> +};
> 
> So I don't see how this code supports booting the venus firmware, is that
> not required on 8550 ?
> 
> I've applied the full patchset to -next
> 
> We don't appear to have enumerated callbacks for booting, clearing
> interrupts..

Hi Bryan,

Seems you are looking in the incorrect folder, these APIs are implemented
in variant specific folder, i.e. iris/variant/iris3

Thanks,
Dikshita
> 
> grep -r clear_interrupt drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c: call_iris_op(core,
> clear_interrupt, core);
> 
> grep -r boot_firmware drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> call_iris_op(core, boot_firmware, core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> call_iris_op(core, boot_firmware, core);
> 
> There is dead code @ raise_interrupt..
> 
> grep -r raise_interrupt drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi_queue.c:    
> call_iris_op(core, raise_interrupt, core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi_queue.c:        
> //call_iris_op(core, raise_interrupt, core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi_queue.c:        
> //call_iris_op(core, raise_interrupt, core);
> 
> grep -r clear_interrupt drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c: call_iris_op(core,
> clear_interrupt, core);
> 
> grep -r prepare_pc drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:int
> __prepare_pc(struct msm_vidc_core *core)
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> call_iris_op(core, prepare_pc, core);
> 
> 
> Here we have an admixture of the new name "Iris" with the old name "venus"
> 
> grep -r power_on drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:static int
> __venus_power_on(struct msm_vidc_core *core)
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> call_iris_op(core, power_on, core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> __venus_power_on(core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:        goto
> err_venus_power_on;
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:err_venus_power_on:
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> __venus_power_on(core);
> 
> grep -r power_off drivers/media/platform/qcom/iris/vidc/src/*
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:        goto
> skip_power_off;
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:skip_power_off:
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:static int
> __venus_power_off(struct msm_vidc_core *core)
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:    rc =
> call_iris_op(core, power_off, core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:
> __venus_power_off(core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:
> __venus_power_off(core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:
> __venus_power_off(core);
> drivers/media/platform/qcom/iris/vidc/src/venus_hfi.c:
> __venus_power_off(core);
> 
> Lending credence to the argument we could incorporate all of some of the is
> logic in the existing venus driver.
> 
> ---
> bod