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Wed, 20 Sep 2023 02:10:23 -0700 (PDT) Received: from [192.168.1.103] ([178.176.76.10]) by smtp.gmail.com with ESMTPSA id p12-20020ac246cc000000b004ff9ee35739sm2609505lfo.283.2023.09.20.02.10.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 Sep 2023 02:10:22 -0700 (PDT) Subject: Re: [PATCH v4 5/5] usb: typec: intel_pmc_mux: Configure Displayport Alternate mode 2.1 To: Utkarsh Patel , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Cc: heikki.krogerus@linux.intel.com, pmalani@chromium.org, chrome-platform@lists.linux.dev, andriy.shevchenko@linux.intel.com, bleung@chromium.org References: <20230920023243.2494410-1-utkarsh.h.patel@intel.com> <20230920023243.2494410-6-utkarsh.h.patel@intel.com> From: Sergei Shtylyov Message-ID: <086a35c5-6402-3e3e-1ac4-fade2797b63a@gmail.com> Date: Wed, 20 Sep 2023 12:10:21 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20230920023243.2494410-6-utkarsh.h.patel@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit On 9/20/23 5:32 AM, Utkarsh Patel wrote: > Mux agent driver can configure cable details such as cable type and > cable speed received as a part of displayport configuration to support > Displayport Alternate mode 2.1. > > Reviewed-by: Andy Shevchenko > Reviewed-by: Heikki Krogerus > Signed-off-by: Utkarsh Patel > --- > Changes in v4: > - No change. > > Changes in v3: > - No change. > > Changes in v2: > - No change. > > drivers/usb/typec/mux/intel_pmc_mux.c | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c > index 60ed1f809130..233958084b43 100644 > --- a/drivers/usb/typec/mux/intel_pmc_mux.c > +++ b/drivers/usb/typec/mux/intel_pmc_mux.c [...] > @@ -293,6 +299,24 @@ pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state) > req.mode_data |= (state->mode - TYPEC_STATE_MODAL) << > PMC_USB_ALTMODE_DP_MODE_SHIFT; > > + if (!is_pmc_mux_tbt(port->pmc->iom_adev)) { > + u8 cable_speed = (data->conf & DP_CONF_SIGNALLING_MASK) >> > + DP_CONF_SIGNALLING_SHIFT; > + > + u8 cable_type = (data->conf & DP_CONF_CABLE_TYPE_MASK) >> > + DP_CONF_CABLE_TYPE_SHIFT; > + > + req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed); > + > + if (cable_type == DP_CONF_CABLE_TYPE_OPTICAL) > + req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE; > + else if (cable_type == DP_CONF_CABLE_TYPE_RE_TIMER) > + req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE | > + PMC_USB_ALTMODE_RETIMER_CABLE; > + else if (cable_type == DP_CONF_CABLE_TYPE_RE_DRIVER) > + req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE; Why not *switch* instead of string of *if*s? > + } > + > ret = pmc_usb_command(port, (void *)&req, sizeof(req)); > if (ret) > return ret; MBR, Sergey