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Message-ID: <7511d03b-5b88-d1c2-d756-4781b12d5296@linaro.org>
Date:   Tue, 4 Apr 2023 20:18:24 +0200
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Subject: Re: [PATCH 1/3] venus: add firmware version based check
Content-Language: en-US
To:     Dikshita Agarwal <quic_dikshita@quicinc.com>,
        linux-media@vger.kernel.org, stanimir.k.varbanov@gmail.com,
        quic_vgarodia@quicinc.com, agross@kernel.org, andersson@kernel.org,
        mchehab@kernel.org
Cc:     linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        Viswanath Boma <quic_vboma@quicinc.com>
References: <1680589032-26046-1-git-send-email-quic_dikshita@quicinc.com>
 <1680589032-26046-2-git-send-email-quic_dikshita@quicinc.com>
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
In-Reply-To: <1680589032-26046-2-git-send-email-quic_dikshita@quicinc.com>
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Precedence: bulk


On 4.04.2023 08:17, Dikshita Agarwal wrote:
> Add firmware version based checks to enable/disable
> features for different SOCs.
> 
> Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
> Signed-off-by: Vikash Garodia <quic_vgarodia@quicinc.com>
> Signed-off-by: Viswanath Boma <quic_vboma@quicinc.com>
> Tested-by: Nathan Hebert <nhebert@chromium.org>
> ---
>  drivers/media/platform/qcom/venus/core.h     | 18 ++++++++++++++++++
>  drivers/media/platform/qcom/venus/hfi_msgs.c | 11 +++++++++--
>  2 files changed, 27 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
> index 32551c2..ee8b70a 100644
> --- a/drivers/media/platform/qcom/venus/core.h
> +++ b/drivers/media/platform/qcom/venus/core.h
> @@ -202,6 +202,11 @@ struct venus_core {
>  	unsigned int core0_usage_count;
>  	unsigned int core1_usage_count;
>  	struct dentry *root;
> +	struct venus_img_version {
> +		u32 major;
> +		u32 minor;
> +		u32 rev;
> +	} venus_ver;
>  };
>  
>  struct vdec_controls {
> @@ -500,4 +505,17 @@ venus_caps_by_codec(struct venus_core *core, u32 codec, u32 domain)
>  	return NULL;
>  }
>  
> +static inline int
> +is_fw_rev_or_newer(struct venus_core *core, u32 vmajor, u32 vminor, u32 vrev)
So this is trying to find the revision of a MAJ.MIN firmware release..

Is the MAJ.MIN part supposed to stay constant for a specific version of
a Venus block (say idk, IRIS2) and only the VREV part is supposed to
be updated with both feature and security developments?

> +{
> +	return ((core)->venus_ver.major == vmajor && (core)->venus_ver.minor ==
> +			vminor && (core)->venus_ver.rev >= vrev);
return ((core)->venus_ver.major == vmajor &&
	(core)->venus_ver.minor == vminor &&
	(core)->venus_ver.rev >= vrev);

for readability

Konrad
> +}
> +
> +static inline int
> +is_fw_rev_or_older(struct venus_core *core, u32 vmajor, u32 vminor, u32 vrev)
> +{
> +	return ((core)->venus_ver.major == vmajor && (core)->venus_ver.minor ==
> +			vminor && (core)->venus_ver.rev <= vrev);
> +}
>  #endif
> diff --git a/drivers/media/platform/qcom/venus/hfi_msgs.c b/drivers/media/platform/qcom/venus/hfi_msgs.c
> index df96db3..07ac0fc 100644
> --- a/drivers/media/platform/qcom/venus/hfi_msgs.c
> +++ b/drivers/media/platform/qcom/venus/hfi_msgs.c
> @@ -248,9 +248,10 @@ static void hfi_sys_init_done(struct venus_core *core, struct venus_inst *inst,
>  }
>  
>  static void
> -sys_get_prop_image_version(struct device *dev,
> +sys_get_prop_image_version(struct venus_core *core,
>  			   struct hfi_msg_sys_property_info_pkt *pkt)
>  {
> +	struct device *dev = core->dev;
>  	u8 *smem_tbl_ptr;
>  	u8 *img_ver;
>  	int req_bytes;
> @@ -263,6 +264,12 @@ sys_get_prop_image_version(struct device *dev,
>  		return;
>  
>  	img_ver = pkt->data;
> +	if (IS_V4(core))
> +		sscanf(img_ver, "14:VIDEO.VE.%u.%u-%u-PROD",
> +		       &core->venus_ver.major, &core->venus_ver.minor, &core->venus_ver.rev);
> +	else if (IS_V6(core))
> +		sscanf(img_ver, "14:VIDEO.VPU.%u.%u-%u-PROD",
> +		       &core->venus_ver.major, &core->venus_ver.minor, &core->venus_ver.rev);
>  
>  	dev_dbg(dev, VDBGL "F/W version: %s\n", img_ver);
>  
> @@ -286,7 +293,7 @@ static void hfi_sys_property_info(struct venus_core *core,
>  
>  	switch (pkt->property) {
>  	case HFI_PROPERTY_SYS_IMAGE_VERSION:
> -		sys_get_prop_image_version(dev, pkt);
> +		sys_get_prop_image_version(core, pkt);
>  		break;
>  	default:
>  		dev_dbg(dev, VDBGL "unknown property data\n");