This adds initial support for the NWL MIPI DSI Host controller found on
i.MX8 SoCs.

It adds support for the i.MX8MQ but the same IP can be found on
e.g. the i.MX8QXP.

It has been tested on the Librem 5 devkit using mxsfb.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Co-developed-by: Robert Chiras <robert.chiras@nxp.com>
Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Tested-by: Robert Chiras <robert.chiras@nxp.com>
Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm>

The Northwest Logic MIPI DSI IP core can be found in NXPs i.MX8 SoCs.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Tested-by: Robert Chiras <robert.chiras@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>

This fixes compilation on next-20191029

This reverts commit b45ce5e0.

Abel Vesa authored Jul 28, 2019 and Guido Gunther committed Feb 17, 2020

Add the initial configuration for clocks that need default parent and rate
setting. This is based on the vendor tree clock provider parents and rates
configuration except this is doing the setup in dts rather then using clock
consumer API in a clock provider driver.

Note that by adding the initial rate setting for audio_pll1/audio_pll
setting we need to remove it from imx8mq-librem5-devkit.dts
imx8mq-librem5-devkit.dts

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Bit 21 can alter the CTRL2_OUTSTANDING_REQS value right after the eLCDIF
is enabled, since it comes up with default value of 1 (this behaviour
has been seen on some imx8 platforms).
In order to fix this, clear CTRL2_OUTSTANDING_REQS bits before setting
its value.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Currently, the enable of the axi clock return status is ignored, causing
issues when the enable fails then we try to disable it. Therefore, it is
better to check the return status and disable it only when enable
succeeded.
Also, remove the helper functions around clk_axi, since we can directly
use the clk API function for enable/disable the clock. Those functions
are already checking for NULL clk and returning 0 if that's the case.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Acked-by: Leonard Crestez <leonard.crestez@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

The eLCDIF controller has control pin for the external LCD reset pin.
Add support for it and assert this pin in enable and de-assert it in
disable.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Add new optional property 'max-memory-bandwidth', to limit the maximum
bandwidth used by the MXSFB_DRM driver.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Because of stability issues, we may want to limit the maximum bandwidth
required by the MXSFB (eLCDIF) driver.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Mirela Rabulea authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Add mxsfb_atomic_helper_check to signal mode changed when bpp changed.
This will trigger the execution of disable/enable on
a modeset with different bpp than the current one.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Currently, the vblank support is not correctly implemented in MXSFB_DRM
driver. The call to drm_vblank_init is made with mode_config.num_crtc
which at that time is 0. Because of this, vblank is not activated, so
there won't be any vblank event submitted.
For example, when running modetest with the '-v' parameter will result
in an astronomical refresh rate (10000+ Hz), because of that.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Since version 4 of eLCDIF, there are some registers that can do
transformations on the input data, like re-arranging the pixel
components. By doing that, we can support more pixel formats.
This patch adds support for X/ABGR and RGBX/A. Although, the local alpha
is not supported by eLCDIF, the alpha pixel formats were added to the
supported pixel formats but it will be ignored. This was necessary since
there are systems (like Android) that requires such pixel formats.

Also, add support for the following pixel formats:
            16 bpp: RG16 ,BG16, XR15, XB15, AR15, AB15

Set the bus format based on input from the user and panel
capabilities.
Save the bus format in crtc->mode.private_flags, so the bridge can
use it.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Use BIT(x) and GEN_MASK(h, l) for better representation the inside of
various registers.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Some of the registers, like LCDC_CTRL, CTRL2_OUTSTANDING_REQS and
CTRL1_RECOVERY_ON_UNDERFLOW needs to be properly cleared/initialized
for a better start and stop routine.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Feb 17, 2020

Some of the existing registers in this controller are not defined, but
also not used. Add them to the register definitions, so that they can be
easily used in future improvements or fixes.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

This changes the clock tree from

to

 osc_25m                             10       12        0    25000000          0     0  50000
   video_pll1_ref_sel                 1        1        0    25000000          0     0  50000
       video_pll1_ref_div             1        1        0     5000000          0     0  50000
          video_pll1                  1        1        0   593999998          0     0  50000
             video_pll1_bypass        1        1        0   593999998          0     0  50000
                video_pll1_out        2        2        0   593999998          0     0  50000
                   dsi_phy_ref        1        1        0    23760000          0     0  50000

Signed-off-by: Guido Günther <agx@sigxcpu.org>

This enables the panel to turn the backlight on and off.

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Enable LCD panel output by adding nodes for the NWL DSI host controller,
the Rocktech panel and the eLCDIF display controller.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

Add a node for the eLCDIF controller, "disabled" by default.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

Add a node for the Northwestlogic MIPI DSI IP core, "disabled" by
default.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Support for the vcnl4040 landet a while ago so add it and the
corresponding pinmux. The irq is currently unused in the driver so don't
configure it yet.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

Otherwis the regulaor turns of vital parts to run the board.

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Angus Ainslie (Purism) authored Dec 16, 2019 and Guido Gunther committed Feb 17, 2020

Co-developed-by: Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Guido Günther <agx@sigxcpu.org>

Martin Kepplinger authored Dec 03, 2019 and Guido Gunther committed Feb 17, 2020

Now that there is driver support, describe the accel and gyro sensor parts
of the LSM9DS1 IMU.

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>

This otherwise confuses mesa/drm which picks the wrong output.

Somewhat based on the defconfig from Boundary Devices BSP.

This makes it easier to spot the drm tree in bug reports and will allow
to differentiate kernel packages later on..

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

This is a work around to ensure smooth kernel upgrades with
older flash-kernel.

Helps https://source.puri.sm/Librem5/linux-next/issues/25



Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Angus Ainslie (Purism) authored Mar 13, 2019 and Guido Gunther committed Feb 17, 2020

This message prints out on every dvfs transtion and fills the kernel
log. Remove it.

Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>

This supports the Librem 5 and it's devkit

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Fixes an #ifdef bug in the patch referred to below that was
causing a build error when CONFIG_DEBUG_VM &&
!CONFIG_CCGROUP_HUGETLB.

Fixes: 54999ed8 ("hugetlb: support file_region coalescing again")
Signed-off-by: Mina Almasry <almasrymina@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>