On Tue, 24 Jan 2023 at 14:19, Mukesh Ojha <quic_mojha@xxxxxxxxxxx> wrote:
>
> Modify qcom_scm_set_download_mode() such that it can support
> multiple modes. There is no functional change with this change.
Please describe usecases for such a change. Without them it's just an
unused complication.
>
> Signed-off-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx>
> ---
> drivers/firmware/qcom_scm.c | 17 ++++++++---------
> include/linux/qcom_scm.h | 5 +++++
> 2 files changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index cdbfe54..712bb03 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -400,22 +400,22 @@ int qcom_scm_set_remote_state(u32 state, u32 id)
> }
> EXPORT_SYMBOL(qcom_scm_set_remote_state);
>
> -static int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
> +static int __qcom_scm_set_dload_mode(struct device *dev, enum qcom_download_mode mode)
> {
> struct qcom_scm_desc desc = {
> .svc = QCOM_SCM_SVC_BOOT,
> .cmd = QCOM_SCM_BOOT_SET_DLOAD_MODE,
> .arginfo = QCOM_SCM_ARGS(2),
> - .args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE,
> + .args[0] = mode,
> .owner = ARM_SMCCC_OWNER_SIP,
> };
>
> - desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
> + desc.args[1] = mode;
>
> return qcom_scm_call_atomic(__scm->dev, &desc, NULL);
> }
>
> -static void qcom_scm_set_download_mode(bool enable)
> +static void qcom_scm_set_download_mode(enum qcom_download_mode mode)
> {
> bool avail;
> int ret = 0;
> @@ -424,10 +424,9 @@ static void qcom_scm_set_download_mode(bool enable)
> QCOM_SCM_SVC_BOOT,
> QCOM_SCM_BOOT_SET_DLOAD_MODE);
> if (avail) {
> - ret = __qcom_scm_set_dload_mode(__scm->dev, enable);
> + ret = __qcom_scm_set_dload_mode(__scm->dev, mode);
> } else if (__scm->dload_mode_addr) {
> - ret = qcom_scm_io_writel(__scm->dload_mode_addr,
> - enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0);
> + ret = qcom_scm_io_writel(__scm->dload_mode_addr, mode);
> } else {
> dev_err(__scm->dev,
> "No available mechanism for setting download mode\n");
> @@ -1410,7 +1409,7 @@ static int qcom_scm_probe(struct platform_device *pdev)
> * disabled below by a clean shutdown/reboot.
> */
> if (download_mode)
> - qcom_scm_set_download_mode(true);
> + qcom_scm_set_download_mode(QCOM_DOWNLOAD_FULLDUMP);
>
> return 0;
> }
> @@ -1419,7 +1418,7 @@ static void qcom_scm_shutdown(struct platform_device *pdev)
> {
> /* Clean shutdown, disable download mode to allow normal restart */
> if (download_mode)
> - qcom_scm_set_download_mode(false);
> + qcom_scm_set_download_mode(QCOM_DOWNLOAD_NODUMP);
> }
>
> static const struct of_device_id qcom_scm_dt_match[] = {
> diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
> index f833564..f9bc84e 100644
> --- a/include/linux/qcom_scm.h
> +++ b/include/linux/qcom_scm.h
> @@ -14,6 +14,11 @@
> #define QCOM_SCM_CPU_PWR_DOWN_L2_OFF 0x1
> #define QCOM_SCM_HDCP_MAX_REQ_CNT 5
>
> +enum qcom_download_mode {
> + QCOM_DOWNLOAD_NODUMP = 0x00,
> + QCOM_DOWNLOAD_FULLDUMP = 0x10,
> +};
> +
> struct qcom_scm_hdcp_req {
> u32 addr;
> u32 val;
> --
> 2.7.4
>
--
With best wishes
Dmitry
