Allow DisplayPort PHYs to be configured through the generic
functions through a custom structure added to the generic union.
The configuration structure is used for reconfiguration of
DisplayPort PHYs during link training operation.
The parameters added here are the ones defined in the DisplayPort
spec v1.4 which include link rate, number of lanes, voltage swing
and pre-emphasis.
Add the DisplayPort phy mode to the generic phy_mode enum.
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: I472cc21ccf19ae55888085500bfad27787cc3074
Now that we have some infrastructure for it, allow the MIPI D-PHY phy's to
be configured through the generic functions through a custom structure
added to the generic union.
The parameters added here are the ones defined in the MIPI D-PHY spec, plus
the number of lanes in use. The current set of parameters should cover all
the potential users.
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: If546789f44b477b9f46507e70ad9a59a4ab35288
The phy framework is only allowing to configure the power state of thePHY
using the init and power_on hooks, and their power_off and exit
counterparts.
While it works for most, simple, PHYs supported so far, some more advanced
PHYs need some configuration depending on runtime parameters. These PHYs
have been supported by a number of means already, often by using ad-hoc
drivers in their consumer drivers.
That doesn't work too well however, when a consumer device needs to deal
with multiple PHYs, or when multiple consumers need to deal with the same
PHY (a DSI driver and a CSI driver for example).
So we'll add a new interface, through two funtions, phy_validate and
phy_configure. The first one will allow to check that a current
configuration, for a given mode, is applicable. It will also allow the PHY
driver to tune the settings given as parameters as it sees fit.
phy_configure will actually apply that configuration in the phy itself.
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: Icd170eaef9a1dbe21e0c7664b797a27877c703b5
For some controllers PHYs can be optional. Handling NULL pointers without
crashing nor failing, makes it easy to handle optional PHYs.
Change-Id: I11c95af8c1b54f2dad41891f6d0edb8d9fac6606
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
(cherry picked from commit 4e1842988364446ba0cf2171d1eebb53c15bc44e)
To avoid compilation breakage on platform that doesn't
support DM PHY but uses xhci-dwc3 driver, add the missing
CONFIG_PHY flag.
Introduced by patch :
84e53877 "usb: host: xhci-dwc3: Add generic PHY support"
Cc: Ran Wang <ran.wang_1@nxp.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reported-by: Ran Wang <ran.wang_1@nxp.com>
This allow to check if a PHY has been correctly
initialised and avoid to get access to phy struct.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
The PHY framework provides a set of APIs to control a PHY. This API is
derived from the linux version of the generic PHY framework.
Currently the API supports init(), deinit(), power_on, power_off() and
reset(). The framework provides a way to get a reference to a phy from the
device-tree.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Wyon Bi
Jean-Jacques Hiblot
Patrice Chotard
Simon Glass