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[0/3] drm: Add support for Okaya RH128128T

Message ID 20200102141246.370-1-geert+renesas@glider.be
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Series drm: Add support for Okaya RH128128T | expand

Message

Geert Uytterhoeven Jan. 2, 2020, 2:12 p.m. UTC 
Hi all,

This patch series adds support for the Okaya RH128128T LCD to the
existing ST7735R driver.  This is a 128x128 1.4" TFT display driven by a
Sitronix ST7715R TFT Controller/Driver.  It is used on the "lcd-pmod"
display module that is shipped with Renesas RSK+RZA1 development boards,
and with several other Renesas starter kits, for RX, Synergy, and RZ/T1
MCUs and SoCs.

I'm not 100% sure about the actual Okaya part number, but this is the
only display listed on the Okaya website that matches the
specifications.

Patch 2 depends on "[PATCH] drm/mipi_dbi: Fix off-by-one bugs in
mipi_dbi_blank()"[1], which I sent earlier this week.

This has been tested using the r7s72100-rskrza1-pmod-spi.dtso and
r7s72100-rskrza1-pmod2-lcd.dtso DT overlays[2].
Note that for using this on RSK+RZA1, there is a dependency on RSPI
cs-gpios support[3].  With DT overlays, this also depends on DT
overlays[4] and gpio-hog overlay support[5].

Thanks for your comments!

[1] https://lore.kernel.org/lkml/20191230130604.31006-1-geert+renesas@glider.be/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/log/?h=topic/renesas-overlays
[3] "[PATCH 0/6] spi: rspi: Add support for multiple native and GPIO
    chip selects"
    https://lore.kernel.org/lkml/20200102133822.29346-1-geert+renesas@glider.be/
[4] https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/log/?h=topic/overlays
[5] "[PATCH/RFC 0/2] gpio: of: Add DT overlay support for GPIO hogs"
    https://lore.kernel.org/lkml/20191230133852.5890-1-geert+renesas@glider.be/

Geert Uytterhoeven (3):
  dt-bindings: display: sitronix,st7735r: Add Okaya rh128128t
  drm/mipi_dbi: Add support for display offsets
  drm: tiny: st7735r: Add support for Okaya RH128128T

 .../bindings/display/sitronix,st7735r.txt     |  4 +-
 drivers/gpu/drm/drm_mipi_dbi.c                | 30 ++++++---
 drivers/gpu/drm/tiny/st7735r.c                | 65 ++++++++++++++++---
 include/drm/drm_mipi_dbi.h                    | 12 ++++
 4 files changed, 90 insertions(+), 21 deletions(-)