Convert UC81XX display to use MIPI DBI API, as this display uses a SPI
3/4 wire bus. In tree shields using this driver have also had their
devicetrees updated to use the new MIPI DBI SPI driver
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Drop a bunch of display functions that only return "not supported", the
display API already handles these by checking for NULL API function
pointer.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Use 'struct uc81xx_tres16' for 16-bit 'tres' setup, instead of 'struct
uc81xx_tres8'. This fixes a regression when support for 'uc8175' was added
and 'struct uc81xx_tres' was replaced with 'struct uc81xx_tres16'.
Fixes: 7c46b0b898 ("drivers: display: uc81xx: add support for uc8175")
Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
Add support for uc8175 display driver. uc8175 has a slightly
different command/data length requirements for certain registers,
namely TRES and PTL, compared to uc8176/uc8179
This commit refactors the driver code and such that setting TRES and PTL
registers are now done by function pointers provided by config->quirks,
by the same token as how it is done for setting CDI register
Signed-off-by: Xiao Qin <xiaoq@google.com>
`spi_is_ready` function is being deprecated in favor of
`spi_is_ready_dt` so let's replace the old usage in the tree.
Signed-off-by: Bartosz Bilas <bartosz.bilas@hotmail.com>
The UC8176 doesn't automatically copy writes to the buffer containing
the old SRAM contents. In this case, we need to manually copy data to
the back buffer.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
Some custom refresh profiles need to set the PLL and VDCS
registers. Add them as optional DT properties.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
Add support for overriding display LUTs in the UC81xx driver. This
makes it possible to use different LUTs for the full and partial
refresh profiles.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
Add a separate profile for partial refreshes. This makes it possible
to specify a separate refresh configuration for partial and full
refreshes.
The driver now transitions to full refresh mode when blanking is
turned on. It transitions back to partial refresh mode when there is a
write while blanking is off.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
Introduce the concept of refresh profiles which are specified as a
child node in the device tree. This makes it possible to use different
overrides for different types of refreshes (full/partial).
The only profile that is currently supported is the "full" profile.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
Some commands need to signal that the chip is busy using the busy
pin. We generally need to wait for the chip to exit the busy state
before issuing a new command. Call uc81xx_busy_wait() from
uc81xx_write_cmd() just before issuing a new command instead to avoid
sprinkling wait calls everywhere.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
The UC81xx driver prints a debug message on every iteration of its
busy wait loop. This makes debug output almost useless. Modify this
code to print a debug message on entry and exit instead.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
The UC8179 supports automatic power management where the DC-DC is
enabled automatically. This is not supported on the UC8176. Explicitly
call PON/DRF/POF from uc81xx_update_display instead. This ensures that
the DC-DC is only enabled while actually updating the display for all
supported chips.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
The CDI register in UC8176 and UC8179 have different layouts. Add a
helper function to the quirks structure to handle CDI updates.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
The UC8176 and UC8179 chips that exist in tree have subtly different
register layouts. Use separate compatible strings for these chips and
a quirks structure that describe device-specific behavior.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
The GD7965 driver is really just a vendor name for the UltraChip
UC8179. Rename the driver to UC81xx since there are other chips in the
family (e.g., the UC8176) with an almost identical register interface.
Signed-off-by: Andreas Sandberg <andreas@sandberg.uk>
