kernel/drivers/gpu/drm/tegra/dpaux.c, branch linux-4.17.y

drm/tegra: dpaux: Keep reset defaults for hybrid pad parameters

2017-12-21T13:52:37Z

Keep the reset values for the common mode voltage, output driver impedance control and output driver current control parameters. This fixes errors seen during SCDC communication with HDMI sinks. Signed-off-by: Thierry Reding

drm/tegra: dpaux: Add Tegra186 support

2017-12-13T13:36:38Z

DPAUX is the same as on previous generations. Supporting it is as simple as adding the compatible string so that the driver will bind to any of the devices. Signed-off-by: Thierry Reding

drm/tegra: dpaux: Implement runtime PM

2017-12-13T13:36:38Z

Move clock and reset management into runtime PM callbacks and hook them up. This cleans up the code structure so that power management code does not clutter up the rest. Signed-off-by: Thierry Reding

drm/tegra: dpaux: Trace register accesses

2017-08-17T15:57:16Z

Add tracepoint events for DPAUX controller register accesses. Signed-off-by: Thierry Reding

drm/tegra: dpaux: Use unsigned int for register offsets

2017-08-17T15:57:12Z

Register offsets are usually fairly small numbers, so an unsigned int is more than enough to represent them. Signed-off-by: Thierry Reding

drm/tegra: dpaux: Fix error handling

2016-11-07T11:58:12Z

The devm_pinctrl_register() function returns an error pointer or a valid handle. So checking for NULL here is pointless and can never trigger. Check the returned value with IS_ERR instead and propagate this value as done in the other functions which call devm_pinctrl_register(). Fixes: 0751bb5c44fe ("drm/tegra: dpaux: Add pinctrl support") Signed-off-by: Christophe JAILLET Acked-by: Jon Hunter Signed-off-by: Thierry Reding

drm/tegra: dpaux: Add pinctrl support

2016-06-30T20:13:14Z

The DPAUX pins are shared with an internal I2C controller. To allow these pins to be muxed to the I2C controller, register a pinctrl device for the DPAUX device. This is based upon work by Thierry Reding . Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

drm/tegra: Prepare DPAUX for supporting generic PM domains

2016-06-30T10:44:50Z

To utilise the DPAUX on Tegra, the SOR power partition must be enabled. Now that Tegra supports the generic PM domain framework we manage the SOR power partition via this framework for DPAUX. However, the sequence for gating/ungating the SOR power partition requires that the DPAUX reset is asserted/de-asserted at the time the SOR power partition is gated/ungated, respectively. Now that the reset control core assumes that resets are exclusive, the Tegra generic PM domain code and the DPAUX driver cannot request the same reset unless we mark the resets as shared. Sharing resets will not work in this case because we cannot guarantee that the reset will be asserted/de-asserted at the appropriate time. Therefore, given that the Tegra generic PM domain code will handle the DPAUX reset, do not request the reset in the DPAUX driver if the DPAUX device has a PM domain associated. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

drm/tegra: dpaux: Add helpers for setting up pads

2016-06-30T10:40:37Z

In preparation for adding pinctrl support for the DPAUX pads, add a couple of helpers functions to configure the pads and control their power. Please note that although a simple if-statement could be used instead of a case statement for configuring the pads as there are only two possible modes, a case statement is used because when integrating with the pinctrl framework, we need to be able to handle invalid modes that could be passed. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

drm/tegra: dpaux: Clean-up on probe failure

2016-06-30T10:30:43Z

If the probing of the DPAUX fails, then clocks are left enabled and the DPAUX reset de-asserted. Add code to perform the necessary clean-up on probe failure by disabling clocks and asserting the reset. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding