Messages in this thread | | | From | Luiz Augusto von Dentz <> | Date | Thu, 13 Oct 2022 13:06:41 -0700 | Subject | Re: [PATCH v1 3/3] Bluetooth: hci_qca: WAR to handle WCN6750 HW issue |
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Hi,
On Thu, Oct 13, 2022 at 12:29 PM mka@chromium.org <mka@chromium.org> wrote: > > On Wed, Jun 22, 2022 at 07:27:21AM +0000, Balakrishna Godavarthi (QUIC) wrote: > > Hi Marcel/Miao, > > > > We are working on new driver, by 7/29 we will submit initial patch for review. > > Has this ever been sent? I skimmed through the list archives and couldn't find it.
If you are asking if it was applied, not it wasn't, it probably needs to be resend since we were expecting a follow up on the set.
> > -----Original Message----- > > From: Miao-chen Chou <mcchou@chromium.org> > > Sent: Tuesday, May 10, 2022 8:47 AM > > To: Balakrishna Godavarthi (QUIC) <quic_bgodavar@quicinc.com> > > Cc: Marcel Holtmann <marcel@holtmann.org>; Andy Gross <agross@kernel.org>; robh+dt@kernel.org; bjorn.andersson@linaro.org; linux-arm-msm@vger.kernel.org; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; Johan Hedberg <johan.hedberg@gmail.com>; mka@chromium.org; linux-bluetooth@vger.kernel.org; Hemant Gupta (QUIC) <quic_hemantg@quicinc.com>; Sai Teja Aluvala (Temp) (QUIC) <quic_saluvala@quicinc.com>; quic_rjliao <quic_rjliao@quicinc.com>; Alain Michaud <alainmichaud@google.com>; Abhishek Pandit-Subedi <abhishekpandit@chromium.org> > > Subject: Re: [PATCH v1 3/3] Bluetooth: hci_qca: WAR to handle WCN6750 HW issue > > > > Hi Bala, > > > > When is the estimated start date and timeline of the driver development? > > > > Thanks, > > Miao > > > > On Fri, Apr 29, 2022 at 8:09 PM Balakrishna Godavarthi (QUIC) <quic_bgodavar@quicinc.com> wrote: > > > > > > Hi Marcel, > > > > > > -----Original Message----- > > > From: Marcel Holtmann <marcel@holtmann.org> > > > Sent: Friday, April 29, 2022 8:24 PM > > > To: Balakrishna Godavarthi (QUIC) <quic_bgodavar@quicinc.com> > > > Cc: Andy Gross <agross@kernel.org>; robh+dt@kernel.org; > > > bjorn.andersson@linaro.org; linux-arm-msm@vger.kernel.org; > > > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; Johan > > > Hedberg <johan.hedberg@gmail.com>; mka@chromium.org; > > > linux-bluetooth@vger.kernel.org; Hemant Gupta (QUIC) > > > <quic_hemantg@quicinc.com>; Sai Teja Aluvala (Temp) (QUIC) > > > <quic_saluvala@quicinc.com>; quic_rjliao <quic_rjliao@quicinc.com>; > > > mcchou@chromium.org > > > Subject: Re: [PATCH v1 3/3] Bluetooth: hci_qca: WAR to handle WCN6750 > > > HW issue > > > > > > Hi Balakrishna, > > > > > > > The patch is workaround for hardware issue on WCN6750. > > > > On WCN6750 sometimes observed AON power source takes 100ms time to > > > > fully discharge voltage during OFF. As WCN6750 is combo chip for > > > > WLAN and BT. If any of the tech area ON is triggered during > > > > discharge phase, it fails to turn ON. > > > > To overcome this hardware issue, During BT ON, driver check for > > > > WLAN_EN pin status. If it high, it will pull BT_EN to high > > > > immediately else it will wait for 100ms assuming WLAN was just > > > > powered OFF and then BT_EN will be pulled to high. > > > > > > > > Fixes: d8f97da1b92d2 ("Bluetooth: hci_qca: Add support for QTI > > > > Bluetooth chip wcn6750") > > > > Reviewed-by: Miao-chen Chou <mcchou@chromium.org> > > > > Signed-off-by: Sai Teja Aluvala <quic_saluvala@quicinc.com> > > > > Signed-off-by: Balakrishna Godavarthi <quic_bgodavar@quicinc.com> > > > > --- > > > > drivers/bluetooth/hci_qca.c | 30 ++++++++++++++++++++++++------ > > > > 1 file changed, 24 insertions(+), 6 deletions(-) > > > > > > > > diff --git a/drivers/bluetooth/hci_qca.c > > > > b/drivers/bluetooth/hci_qca.c index eab34e2..c3862d1 100644 > > > > --- a/drivers/bluetooth/hci_qca.c > > > > +++ b/drivers/bluetooth/hci_qca.c > > > > @@ -219,6 +219,7 @@ struct qca_serdev { > > > > struct hci_uart serdev_hu; > > > > struct gpio_desc *bt_en; > > > > struct gpio_desc *sw_ctrl; > > > > + struct gpio_desc *wlan_en; > > > > struct clk *susclk; > > > > enum qca_btsoc_type btsoc_type; > > > > struct qca_power *bt_power; > > > > > > I am really against these intermixing of Bluetooth and WiFi details. There is work ongoing to do some sequence power procedure. Maybe that is something you should look into. This is a mess. > > > > > > And again, we are still hacking around hci_qca.c instead of writing a clean serdev only driver for this hardware. I have the feeling that nobody listens to review comments these days. It is just hacking patches together to get hardware enabled somehow and then disappear. > > > > > > [Bala]: We are working on serdev like driver for our QCA platform. We are in initial stages of discussion, and soon we will start the driver development work. > > > In mean to stop stability or functional issues we are trying to add these HACKs in QCA driver. > > > > > > Regards > > > > > > Marcel > > >
-- Luiz Augusto von Dentz
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