linux-kernel - Re: [PATCH v4] media: venus : hfi: add venus image info into smem

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Date:   Fri, 9 Apr 2021 11:45:00 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Dikshita Agarwal <dikshita@...eaurora.org>
Cc:     linux-media@...r.kernel.org, stanimir.varbanov@...aro.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        vgarodia@...eaurora.org, swboyd@...omium.org
Subject: Re: [PATCH v4] media: venus : hfi: add venus image info into smem

On Fri 09 Apr 06:46 CDT 2021, Dikshita Agarwal wrote:

> Fill fw version info into smem to be printed as part of
> soc info.
> 
> Signed-off-by: Dikshita Agarwal <dikshita@...eaurora.org>
> Reported-by: kernel test robot <lkp@...el.com>

Why/how did kernel test robot tell you that you should write the
firmware version in SMEM?

> 
> change since v3:
>  added dependency on QCOM_SMEM (Stephen)
> ---
>  drivers/media/platform/Kconfig               |  2 +-
>  drivers/media/platform/qcom/venus/hfi_msgs.c | 21 +++++++++++++++++++--
>  2 files changed, 20 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index fd1831e..9c75e88 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -543,7 +543,7 @@ config VIDEO_TI_VPE_DEBUG
>  
>  config VIDEO_QCOM_VENUS
>  	tristate "Qualcomm Venus V4L2 encoder/decoder driver"
> -	depends on VIDEO_DEV && VIDEO_V4L2
> +	depends on VIDEO_DEV && VIDEO_V4L2 && QCOM_SMEM
>  	depends on (ARCH_QCOM && IOMMU_DMA) || COMPILE_TEST
>  	select QCOM_MDT_LOADER if ARCH_QCOM
>  	select QCOM_SCM if ARCH_QCOM
> diff --git a/drivers/media/platform/qcom/venus/hfi_msgs.c b/drivers/media/platform/qcom/venus/hfi_msgs.c
> index 06a1908..74cfc4f 100644
> --- a/drivers/media/platform/qcom/venus/hfi_msgs.c
> +++ b/drivers/media/platform/qcom/venus/hfi_msgs.c
> @@ -6,6 +6,7 @@
>  #include <linux/hash.h>
>  #include <linux/list.h>
>  #include <linux/slab.h>
> +#include <linux/soc/qcom/smem.h>
>  #include <media/videobuf2-v4l2.h>
>  
>  #include "core.h"
> @@ -14,6 +15,10 @@
>  #include "hfi_msgs.h"
>  #include "hfi_parser.h"
>  
> +#define SMEM_IMG_VER_TBL 469
> +#define VER_STR_SZ	128
> +#define SMEM_IMG_OFFSET_VENUS (14 * 128)
> +
>  static void event_seq_changed(struct venus_core *core, struct venus_inst *inst,
>  			      struct hfi_msg_event_notify_pkt *pkt)
>  {
> @@ -239,15 +244,27 @@ static void
>  sys_get_prop_image_version(struct device *dev,
>  			   struct hfi_msg_sys_property_info_pkt *pkt)
>  {
> +	u8 *smem_tbl_ptr;
> +	u8 *img_ver;
>  	int req_bytes;
> +	size_t smem_blk_sz;
>  
>  	req_bytes = pkt->hdr.size - sizeof(*pkt);
>  
> -	if (req_bytes < 128 || !pkt->data[1] || pkt->num_properties > 1)
> +	if (req_bytes < VER_STR_SZ || !pkt->data[1] || pkt->num_properties > 1)
>  		/* bad packet */
>  		return;
>  
> -	dev_dbg(dev, VDBGL "F/W version: %s\n", (u8 *)&pkt->data[1]);
> +	img_ver = (u8 *)&pkt->data[1];
> +
> +	dev_dbg(dev, VDBGL "F/W version: %s\n", img_ver);
> +
> +	smem_tbl_ptr = qcom_smem_get(QCOM_SMEM_HOST_ANY,
> +		SMEM_IMG_VER_TBL, &smem_blk_sz);
> +	if (smem_tbl_ptr &&
> +	    smem_blk_sz >= SMEM_IMG_OFFSET_VENUS + VER_STR_SZ)
> +		memcpy(smem_tbl_ptr + SMEM_IMG_OFFSET_VENUS,
> +		       img_ver, VER_STR_SZ);

I think you should unwrap lines, the conditional isn't even more than 80
chars...

Apart from these nits I think the patch looks good.

Regards,
Bjorn

>  }
>  
>  static void hfi_sys_property_info(struct venus_core *core,
> -- 
> 2.7.4
>