From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5E7D101F5; Tue, 28 Nov 2023 10:59:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eczUyTMR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 849A4C433C8; Tue, 28 Nov 2023 10:59:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701169152; bh=pQ6FVnUKsfGHsu8sriIae2vcxGsRE9QkkGxs13ICyCE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=eczUyTMRxEbZgZ3/Aw6I3YRgAF/C6VV0NDmyb7s6k5GencSI9RrbrDLCW9ZbK0FEt pMrlmw2Bjy8kc+9IApv5/S/MJakn78cgvlmoAhveTj1YB8GvRVd4x1+w2rS7qGnLS3 L41ie3FrFViEpengiUXm+RvvcQPKViu5GKUSvP2EfkRO2k53AFdiWB5wthhVHnEqPJ tvR6PSCqbfITTwOuw+7AYsQ3dg+YyjVXfx3RI5b+j5nh4GedDVUQGqO6cy5ZPEYfef gcU6oUkOcFeHDVzre5OvMW1yzCCHVNpcqIdWOb7TrXK/8D90xv9YEKjzDrZnDAsrEt XtI2tZXgRXexA== Date: Tue, 28 Nov 2023 16:29:02 +0530 From: Manivannan Sadhasivam To: Can Guo Cc: bvanassche@acm.org, adrian.hunter@intel.com, beanhuo@micron.com, avri.altman@wdc.com, junwoo80.lee@samsung.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, Andy Gross , Bjorn Andersson , Konrad Dybcio , "James E.J. Bottomley" , open list Subject: Re: [PATCH v5 07/10] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 5 and newer Message-ID: <20231128105902.GP3088@thinkpad> References: <1700729190-17268-1-git-send-email-quic_cang@quicinc.com> <1700729190-17268-8-git-send-email-quic_cang@quicinc.com> <20231128060046.GH3088@thinkpad> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Nov 28, 2023 at 03:58:42PM +0800, Can Guo wrote: > Hi Mani, > > On 11/28/2023 2:00 PM, Manivannan Sadhasivam wrote: > > On Thu, Nov 23, 2023 at 12:46:27AM -0800, Can Guo wrote: > > > Set the initial PHY gear to max HS gear for hosts with HW ver 5 and newer. > > > > > > > MAX_GEAR will be used for hosts with hw_ver.major >= 4 > > I put it > 5 because I am not intent to touch any old targets which has > proven working fine with starting with PHY gear HS_G2. If I put it >= 4, > there would be many targets impacted by this change. I need to go back and > test those platforms (HW ver == 4). > This assumption will make the code hard to maintain. I think if you happen to test it on atleast a couple of old targets it should be good since I do not see how others can fail. - Mani > Thanks, > Can Guo. > > > > > > This patch is not changing any functionalities or logic but only a > > > preparation patch for the next patch in this series. > > > > > > Signed-off-by: Can Guo > > > --- > > > drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------ > > > 1 file changed, 15 insertions(+), 6 deletions(-) > > > > > > diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c > > > index 6756f8d..7bbccf4 100644 > > > --- a/drivers/ufs/host/ufs-qcom.c > > > +++ b/drivers/ufs/host/ufs-qcom.c > > > @@ -1067,6 +1067,20 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba) > > > hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; > > > } > > > +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host) > > > +{ > > > + struct ufs_host_params *host_params = &host->host_params; > > > + > > > + host->phy_gear = host_params->hs_tx_gear; > > > + > > > + /* > > > + * Power up the PHY using the minimum supported gear (UFS_HS_G2). > > > + * Switching to max gear will be performed during reinit if supported. > > > > You need to reword this comment too. > > > > > + */ > > > + if (host->hw_ver.major < 0x5) > > > > As I mentioned above, MAX_GEAR will be used if hw_ver.major is >=4 in > > ufs_qcom_get_hs_gear(). So this check should be (< 0x4). > > > > - Mani > > > > > + host->phy_gear = UFS_HS_G2; > > > +} > > > + > > > static void ufs_qcom_set_host_params(struct ufs_hba *hba) > > > { > > > struct ufs_qcom_host *host = ufshcd_get_variant(hba); > > > @@ -1303,6 +1317,7 @@ static int ufs_qcom_init(struct ufs_hba *hba) > > > ufs_qcom_set_caps(hba); > > > ufs_qcom_advertise_quirks(hba); > > > ufs_qcom_set_host_params(hba); > > > + ufs_qcom_set_phy_gear(host); > > > err = ufs_qcom_ice_init(host); > > > if (err) > > > @@ -1320,12 +1335,6 @@ static int ufs_qcom_init(struct ufs_hba *hba) > > > dev_warn(dev, "%s: failed to configure the testbus %d\n", > > > __func__, err); > > > - /* > > > - * Power up the PHY using the minimum supported gear (UFS_HS_G2). > > > - * Switching to max gear will be performed during reinit if supported. > > > - */ > > > - host->phy_gear = UFS_HS_G2; > > > - > > > return 0; > > > out_variant_clear: > > > -- > > > 2.7.4 > > > > > -- மணிவண்ணன் சதாசிவம்