The head number of a given display controller is fixed in hardware and
required to program outputs appropriately. Relying on the driver probe
order to determine this number will not work, since that could yield a
situation where the second head was probed first and would be assigned
head number 0 instead of 1.

By explicitly specifying the head number in the device tree, it is no
longer necessary to rely on these assumptions. As a fallback, if the
property isn't available, derive the head number from the display
controller node's position in the device tree. That's somewhat more
reliable than the previous default but not a proper solution.
Tested-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

This stashes away the EDID data so that the sysfs per-connector file
"edid" can display it. Without this change, the "edid" file is always
empty.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Nothing from the asm/mach/irq.h header is needed in this file, so there
is no need to include it.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The last argument to of_get_property() is a pointer to an int, rather
than size_t.
Signed-off-by: NThierry Reding <treding@nvidia.com>

When a panel advertises one or more modes, they are used exclusively.
Other methods for obtaining the mode, such as DDC as used for HDMI or
binary EDID blobs embedded in the DT, are ignored. The panel drivers
should be providing this functionality if they want to expose it as
well.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The mask of possible CRTCs that an output (DRM encoder) can be attached
to is relative to the position within the DRM device's list of CRTCs.
Deferred probing can cause this to not match the pipe number associated
with a CRTC. Use the newly introduced drm_crtc_mask() to compute the
mask by looking up the proper index of the given CRTC in the list.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The intel_encoder_crtc_ok() is a duplicate of the drm_encoder_crtc_ok()
function that used to be only available in the DRM CRTC helpers. It has
recently been moved to the core, so the duplicate can now be dropped.
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Using the new drm_crtc_mask() function, drm_encoder_crtc_ok() can now be
written in a significantly shorter way, so it can be moved to a header
file and be made static inline.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The encoder possible_crtcs mask identifies which CRTCs can be bound to
a particular encoder.  Each bit from bit 0 defines an index in the list
of CRTCs held in the DRM mode_config crtc_list.  Rather than having
drivers trying to track the position of their CRTCs in the list, expose
the code which already exists for calculating the appropriate mask bit
for a CRTC.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: NDavid Herrmann <dh.herrmann@gmail.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
[treding@nvidia.com: add drm_crtc_index(), move to core]
Signed-off-by: NThierry Reding <treding@nvidia.com>

devm_ioremap_resource() does sanity checks on the given resource. No
need to duplicate this in the driver.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Reviewed-by: NTerje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Chunghwa CLAA101WA01A is a 10.1" 1366x768 panel, which can be
supported by the simple panel driver.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Samsung LNT101NT05 10.1" WXVGA panel can be supported by the simple panel
driver.

Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>

With CONFIG_DYNAMIC_DEBUG=y, the following compile error occurs:

drivers/gpu/drm/tegra/mipi-phy.c: In function ‘mipi_dphy_timing_validate’:
drivers/gpu/drm/tegra/mipi-phy.c:69:11: error: ‘EINVAL’ undeclared (first use in this function)
drivers/gpu/drm/tegra/mipi-phy.c:69:11: note: each undeclared identifier is reported only once for each function it appears in

Fix this by directly including the header that defines EINVAL.

Fixes: dec72739 ("drm/tegra: Add DSI support")
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Implement very basic PRIME support. This currently only works with
buffers that are contiguous in memory and will refuse to import any
physically non-contiguous buffers.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Some of the code in the CRTC's mode setting code is specific to the RGB
output or needs to be called slightly differently depending on the type
of output. Push that code down into the output drivers.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Tegra124 and later support interlacing, but the driver doesn't support
it yet. Make sure interlacing stays disabled on hardware that supports
it.
Signed-off-by: NThierry Reding <treding@nvidia.com>

If we don't have enough memory for ->planes then we leak "fb".
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

A lot of the modern userspace is capable of working without the legacy
fbdev support. kmscon can be used as a replacement for the framebuffer
console, and KMS X drivers create their own framebuffers.

Most people don't have a system where all of this works yet, though, so
leave support enabled by default.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Move the TEGRA_HOST1X and DRM_KMS_HELPER entries around to keep the list
sorted.
Signed-off-by: NThierry Reding <treding@nvidia.com>

In case of error, the devm_ioremap_resource() function returns ERR_PTR()
and never NULL. The NULL test in the return value check should therefore
be replaced with IS_ERR().
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NThierry Reding <treding@nvidia.com>

This commit adds support for both DSI outputs found on Tegra. Only very
minimal functionality is implemented, so advanced features like ganged
mode won't work.

Due to the lack of other test hardware, some sections of the driver are
hardcoded to work with Dalmore.
Signed-off-by: NThierry Reding <treding@nvidia.com>

When an output is disabled, its DPMS mode is usually set to off. Instead
of only disabling the panel (if one is attached), turn the output off
entirely to save more power.

HDMI doesn't have any panels attached, so it previously didn't save any
power at all. With this commit, however, the complete HDMI interface
will be turned off, therefore allowing an attached monitor to go into a
standby mode.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The DRM core doesn't track enable and disable state of encoders and/or
connectors, so calls to the output's .enable() and .disable() are not
guaranteed to be balanced. Track the enable state internally so that
calls to regulator and clock frameworks remain balanced.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The correct check is for 48 kHz, not 480 kHz. Found by Coverity.
Signed-off-by: NThierry Reding <treding@nvidia.com>

These buffer object operations are never used outside of the GEM
implementation so there is no use in exporting them.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Signed-off-by: NThierry Reding <treding@nvidia.com>

The ARCH_MULTIPLATFORM dependency was introduced back when Tegra didn't
support multiplatform yet as a means to allow the driver to be easily
compile-tested along with other DRM drivers. In the meantime, the new
COMPILE_TEST Kconfig option has been introduced for exactly that
purpose, so use that instead to clarify the intention.
Signed-off-by: NThierry Reding <treding@nvidia.com>

All APIs that the driver uses are exported, so the driver can now be
built as a module.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Tegra124 has 192 syncpoints whereas its predecessors had 32 syncpoints.
This required changes to the hardware register layout.
Signed-off-by: NArto Merilainen <amerilainen@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Treat both negative and zero return values from clk_round_rate() as
errors.  This is needed since subsequent patches will convert
clk_round_rate()'s return value to be an unsigned type, rather than a
signed type, since some clock sources can generate rates higher than
(2^31)-1 Hz.

Eventually, when calling clk_round_rate(), only a return value of zero
will be considered a error.  All other values will be considered valid
rates.  The comparison against values less than 0 is kept to preserve
the correct behavior in the meantime.
Signed-off-by: NPaul Walmsley <pwalmsley@nvidia.com>
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Cc: Arto Merilainen <amerilainen@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Terje Bergström <tbergstrom@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

When debugfs support isn't enabled, gcc complains about some variables
being unused. To avoid further #ifdefery, move debugfs specific setup
code into static functions and use IS_ENABLED(CONFIG_DEBUG_FS) to have
the compiler, rather than the preprocessor, discard them when unused.
The advantage of doing it this way is that all the code will be
compile-tested whether or not debugfs support is enabled.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The ARCH_MULTIPLATFORM dependency was introduced back when Tegra didn't
support multiplatform yet as a means to allow the driver to be easily
compile-tested along with other DRM drivers. In the meantime, the new
COMPILE_TEST Kconfig option has been introduced for exactly that
purpose, so use that instead to clarify the intention.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Include the linux/host1x.h and dev.h headers so that function prototypes
are visible to keep sparse from suggesting that their implementations be
made static.
Signed-off-by: NThierry Reding <treding@nvidia.com>

An earlier patch added a subset of the required HW specific header files
but didn't actually include the right ones when compiling for host1x02.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Make the public API symbols visible so that depending drivers can be
built as a module.
Signed-off-by: NThierry Reding <treding@nvidia.com>

This driver adds support to perform calibration of the MIPI pads for CSI
and DSI.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Introduce device tree bindings for the MIPI pad calibration controller
found on Tegra SoCs. The controller can be used to perform calibration
of pads used for DSI and CSI peripherals.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The display controller primary clock was recently renamed to "dc", so
update the example to reflect that.
Signed-off-by: NThierry Reding <treding@nvidia.com>

Use the DRM panel framework to attach a panel to an output. If the panel
attached to a connector supports supports the backlight brightness
accessors, a property will be available to allow the brightness to be
modified from userspace.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Panasonic VVX10F004B0 is a 10.1" WUXGA TFT LCD panel connected using
four DSI lanes.
Signed-off-by: NThierry Reding <treding@nvidia.com>