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SubjectRe: [PATCH v6 2/4] venus: firmware: move load firmware in a separate function
On Fri, Aug 24, 2018 at 6:01 PM Stanimir Varbanov
<stanimir.varbanov@linaro.org> wrote:
>
> Hi Alex,
>
> On 08/24/2018 10:39 AM, Alexandre Courbot wrote:
> > On Thu, Aug 23, 2018 at 11:29 PM Vikash Garodia <vgarodia@codeaurora.org> wrote:
> >>
> >> Separate firmware loading part into a new function.
> >>
> >> Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
> >> ---
> >> drivers/media/platform/qcom/venus/core.c | 4 +-
> >> drivers/media/platform/qcom/venus/firmware.c | 55 ++++++++++++++++++----------
> >> drivers/media/platform/qcom/venus/firmware.h | 2 +-
> >> 3 files changed, 38 insertions(+), 23 deletions(-)
> >>
> >> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> >> index bb6add9..75b9785 100644
> >> --- a/drivers/media/platform/qcom/venus/core.c
> >> +++ b/drivers/media/platform/qcom/venus/core.c
> >> @@ -84,7 +84,7 @@ static void venus_sys_error_handler(struct work_struct *work)
> >>
> >> pm_runtime_get_sync(core->dev);
> >>
> >> - ret |= venus_boot(core->dev, core->res->fwname);
> >> + ret |= venus_boot(core);
> >>
> >> ret |= hfi_core_resume(core, true);
> >>
> >> @@ -284,7 +284,7 @@ static int venus_probe(struct platform_device *pdev)
> >> if (ret < 0)
> >> goto err_runtime_disable;
> >>
> >> - ret = venus_boot(dev, core->res->fwname);
> >> + ret = venus_boot(core);
> >> if (ret)
> >> goto err_runtime_disable;
> >>
> >> diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
> >> index a9d042e..34224eb 100644
> >> --- a/drivers/media/platform/qcom/venus/firmware.c
> >> +++ b/drivers/media/platform/qcom/venus/firmware.c
> >> @@ -60,20 +60,18 @@ int venus_set_hw_state(struct venus_core *core, bool resume)
> >> return 0;
> >> }
> >>
> >> -int venus_boot(struct device *dev, const char *fwname)
> >> +static int venus_load_fw(struct venus_core *core, const char *fwname,
> >> + phys_addr_t *mem_phys, size_t *mem_size)
> >
> > Following the remarks of the previous patch, you would have mem_phys
> > and mem_size as members of venus_core (probably renamed as fw_mem_addr
> > and fw_mem_size).
> >
> >> {
> >> const struct firmware *mdt;
> >> struct device_node *node;
> >> - phys_addr_t mem_phys;
> >> + struct device *dev;
> >> struct resource r;
> >> ssize_t fw_size;
> >> - size_t mem_size;
> >> void *mem_va;
> >> int ret;
> >>
> >> - if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
> >> - return -EPROBE_DEFER;
> >
> > !IS_ENABLED(CONFIG_QCOM_MDT_LOADER) is not a condition that can change
> > at runtime, and returning -EPROBE_DEFER in that case seems erroneous
> > to me. Instead, wouldn't it make more sense to make the driver depend
> > on QCOM_MDT_LOADER?
>
> That was made on purpose, for more info git show b8f9bdc151e4a

Ah, I see. Still, in the current form it seems like
qcom_scm_is_available() is not resolved thanks to a compiler
optimization. Wouldn't it be more explicit to do something like

#if IS_ENABLED(CONFIG_QCOM_MDT_LOADER)
if (!qcom_scm_is_available())
return -EPROBE_DEFER;
#endif

instead?

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