[PATCH v6 0/5] Add device DM163 (led driver, matrix colors shield & display)

[Inès Varhol]

This device implements the IM120417002 colors shield v1.1 for Arduino
(which relies on the DM163 8x3-channel led driving logic) and features
a simple display of an 8x8 RGB matrix. This color shield can be plugged
on the Arduino board (or the B-L475E-IOT01A board) to drive an 8x8
RGB led matrix. This RGB led matrix takes advantage of retinal persistance
to seemingly display different colors in each row.

Thank you for the reviews.

Changes from v5 (1st commit) :
- use `extract16` and `deposit32` in `dm163_propagate_outputs` for
more clarity
- similarly, use `extract64` and `deposit32` in `dm163_bank(0|1)`

Changes from v4 :
dm163
- redefine `DM163_NUM_LEDS` for clarity
- change definition of `COLOR_BUFFER_SIZE`
- rename `age_of_row` to `row_persistance_delay`
- remove unnecessary QOM cast macro in GPIO handlers
- remove unnecessary inline of `dm163_bank0` and `dm163_bank1`
- replace occurrences of number 8 by the right define macro
- use unsigned type to print GPIO input `new_stateq`
STM32L4x5 qtests
- add comment to explain GPIO forwarding to SoC
B-L475E-IOT01A
- correct formatting
- use unsigned for gpio pins' indices
DM163 qtest
- use an enum for dm163 inputs
- inline ['dm163-test'] in meson.build (I don't plan on adding qtests)
OTHER
- update copyrights to 2023-2024

Changes from v3 (review of the 1st commit by Peter Maydell) :
- dm163.c : instead of redrawing the entire console each frame,
only redraw the rows that changed using a new variable `redraw`
- reset all the fields in `dm163_reset_hold`
- correcting typos : persistance -> persistence
- b-l475e-iot01a.rst : correcting typo

Changes from v2 : Corrected typo in the Based-on message id

Changes from v1 :
- moving the DM163 from the SoC to the B-L475E-IOT01A machine
(changing config files and tests accordingly)
- restricting DM163 test to ARM & DM163 availability
- using `object_class_by_name()` to check for DM163 presence at run-time
- exporting SYSCFG inputs to the SoC (and adapting tests accordingly)

Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Inès Varhol (5):
  hw/display : Add device DM163
  hw/arm : Pass STM32L4x5 SYSCFG gpios to STM32L4x5 SoC
  hw/arm : Create Bl475eMachineState
  hw/arm : Connect DM163 to B-L475E-IOT01A
  tests/qtest : Add testcase for DM163

 docs/system/arm/b-l475e-iot01a.rst  |   3 +-
 include/hw/display/dm163.h          |  59 +++++
 hw/arm/b-l475e-iot01a.c             | 105 +++++++--
 hw/arm/stm32l4x5_soc.c              |   6 +-
 hw/display/dm163.c                  | 349 ++++++++++++++++++++++++++++
 tests/qtest/dm163-test.c            | 194 ++++++++++++++++
 tests/qtest/stm32l4x5_gpio-test.c   |  13 +-
 tests/qtest/stm32l4x5_syscfg-test.c |  17 +-
 hw/arm/Kconfig                      |   1 +
 hw/display/Kconfig                  |   3 +
 hw/display/meson.build              |   1 +
 hw/display/trace-events             |  14 ++
 tests/qtest/meson.build             |   2 +
 13 files changed, 736 insertions(+), 31 deletions(-)
 create mode 100644 include/hw/display/dm163.h
 create mode 100644 hw/display/dm163.c
 create mode 100644 tests/qtest/dm163-test.c

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2.43.2