Messages in this thread | | | Subject | Re: [PATCH 1/1] scsi: ufs: Remove scale down gear hard code | From | "Asutosh Das (asd)" <> | Date | Mon, 30 Nov 2020 14:54:52 -0800 |
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On 11/26/2020 5:58 PM, Can Guo wrote: > Instead of making the scale down gear a hard code, make it a member of > ufs_clk_scaling struct. > > Signed-off-by: Can Guo <cang@codeaurora.org> > ---
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
> drivers/scsi/ufs/ufshcd.c | 12 +++++++----- > drivers/scsi/ufs/ufshcd.h | 2 ++ > 2 files changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 44254c9..1789df3 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -1100,7 +1100,6 @@ static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba, > */ > static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up) > { > - #define UFS_MIN_GEAR_TO_SCALE_DOWN UFS_HS_G1 > int ret = 0; > struct ufs_pa_layer_attr new_pwr_info; > > @@ -1111,16 +1110,16 @@ static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up) > memcpy(&new_pwr_info, &hba->pwr_info, > sizeof(struct ufs_pa_layer_attr)); > > - if (hba->pwr_info.gear_tx > UFS_MIN_GEAR_TO_SCALE_DOWN > - || hba->pwr_info.gear_rx > UFS_MIN_GEAR_TO_SCALE_DOWN) { > + if (hba->pwr_info.gear_tx > hba->clk_scaling.min_gear || > + hba->pwr_info.gear_rx > hba->clk_scaling.min_gear) { > /* save the current power mode */ > memcpy(&hba->clk_scaling.saved_pwr_info.info, > &hba->pwr_info, > sizeof(struct ufs_pa_layer_attr)); > > /* scale down gear */ > - new_pwr_info.gear_tx = UFS_MIN_GEAR_TO_SCALE_DOWN; > - new_pwr_info.gear_rx = UFS_MIN_GEAR_TO_SCALE_DOWN; > + new_pwr_info.gear_tx = hba->clk_scaling.min_gear; > + new_pwr_info.gear_rx = hba->clk_scaling.min_gear; > } > } > > @@ -1824,6 +1823,9 @@ static void ufshcd_init_clk_scaling(struct ufs_hba *hba) > if (!ufshcd_is_clkscaling_supported(hba)) > return; > > + if (!hba->clk_scaling.min_gear) > + hba->clk_scaling.min_gear = UFS_HS_G1; > + > INIT_WORK(&hba->clk_scaling.suspend_work, > ufshcd_clk_scaling_suspend_work); > INIT_WORK(&hba->clk_scaling.resume_work, > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h > index 6f0f2d4..bdab23e 100644 > --- a/drivers/scsi/ufs/ufshcd.h > +++ b/drivers/scsi/ufs/ufshcd.h > @@ -385,6 +385,7 @@ struct ufs_saved_pwr_info { > * @workq: workqueue to schedule devfreq suspend/resume work > * @suspend_work: worker to suspend devfreq > * @resume_work: worker to resume devfreq > + * @min_gear: lowest HS gear to scale down to > * @is_allowed: tracks if scaling is currently allowed or not > * @is_busy_started: tracks if busy period has started or not > * @is_suspended: tracks if devfreq is suspended or not > @@ -399,6 +400,7 @@ struct ufs_clk_scaling { > struct workqueue_struct *workq; > struct work_struct suspend_work; > struct work_struct resume_work; > + u32 min_gear; > bool is_allowed; > bool is_busy_started; > bool is_suspended; >
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