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Subject[PATCH v2 5/5] drm: tiny: st7735r: Add support for Okaya RH128128T
Date
Add support for the Okaya RH128128T display to the st7735r driver on
DT-enabled systems.

The RH128128T is a 128x128 1.44" TFT display driven by a Sitronix
ST7715R TFT Controller/Driver. The latter is very similar to the
ST7735R, and can be handled by the existing st7735r driver.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
- Split in two patches,
- Update Kconfig help text,
- Improve file comment header.
---
drivers/gpu/drm/tiny/Kconfig | 8 +++++---
drivers/gpu/drm/tiny/st7735r.c | 9 ++++++++-
2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
index a46ac284dd5e9211..a8664211123e7025 100644
--- a/drivers/gpu/drm/tiny/Kconfig
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -85,14 +85,16 @@ config TINYDRM_ST7586
If M is selected the module will be called st7586.

config TINYDRM_ST7735R
- tristate "DRM support for Sitronix ST7735R display panels"
+ tristate "DRM support for Sitronix ST7715R/ST7735R display panels"
depends on DRM && SPI
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_MIPI_DBI
select BACKLIGHT_CLASS_DEVICE
help
- DRM driver Sitronix ST7735R with one of the following LCDs:
- * JD-T18003-T01 1.8" 128x160 TFT
+ DRM driver for Sitronix ST7715R/ST7735R with one of the following
+ LCDs:
+ * Jianda JD-T18003-T01 1.8" 128x160 TFT
+ * Okaya RH128128T 1.44" 128x128 TFT

If M is selected the module will be called st7735r.
diff --git a/drivers/gpu/drm/tiny/st7735r.c b/drivers/gpu/drm/tiny/st7735r.c
index a838f237c8d82e3d..32574f1b60716390 100644
--- a/drivers/gpu/drm/tiny/st7735r.c
+++ b/drivers/gpu/drm/tiny/st7735r.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * DRM driver for Sitronix ST7735R panels
+ * DRM driver for display panels connected to a Sitronix ST7715R or ST7735R
+ * display controller in SPI mode.
*
* Copyright 2017 David Lechner <david@lechnology.com>
* Copyright (C) 2019 Glider bvba
@@ -144,6 +145,11 @@ static const struct st7735r_cfg jd_t18003_t01_cfg = {
.write_only = true,
};

+static const struct st7735r_cfg rh128128t_cfg = {
+ .mode = { DRM_SIMPLE_MODE(128, 128, 25, 26) },
+ .left_offset = 2,
+ .top_offset = 3,
+ .rgb = true,
};

DEFINE_DRM_GEM_CMA_FOPS(st7735r_fops);
@@ -163,6 +169,7 @@ static struct drm_driver st7735r_driver = {

static const struct of_device_id st7735r_of_match[] = {
{ .compatible = "jianda,jd-t18003-t01", .data = &jd_t18003_t01_cfg },
+ { .compatible = "okaya,rh128128t", .data = &rh128128t_cfg },
{ },
};
MODULE_DEVICE_TABLE(of, st7735r_of_match);
--
2.17.1
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