This adds a new driver for Sitronix ST7735R display panels.
This has been tested using an Adafruit 1.8" TFT.
Signed-off-by: David Lechner
Reviewed-by: Noralf Trønnes
---
v4 changes:
* renamed st7735r_pipe_enable to jd_t18003_t01_pipe_enable
* renamed st7735r_pipe_funcs to jd_t18003_t01_pipe_funcs
* changed gamma curve to one from Adafruit's Arduino library
v3 changes:
* Changed compatible string
* use SPDX license header
* Renamed mode struct to use panel name instead of controller name
v2 changes:
* Change delay from 10ms to 20ms to avoid checkpatch warning
* Use mipi_dbi_pipe_enable()/mipi_dbi_pipe_disable() to reduce duplicated code
* Rebase on drm-misc-next (tinydrm_lastclose => drm_fb_helper_lastclose)
* Use mipi_dbi_debugfs_init
* Add mipi->read_commands = NULL; since this display is write-only
MAINTAINERS | 6 ++
drivers/gpu/drm/tinydrm/Kconfig | 10 ++
drivers/gpu/drm/tinydrm/Makefile | 1 +
drivers/gpu/drm/tinydrm/st7735r.c | 215 ++
4 files changed, 232 insertions(+)
create mode 100644 drivers/gpu/drm/tinydrm/st7735r.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 528e223..b4ffbc2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4556,6 +4556,12 @@ S: Maintained
F: drivers/gpu/drm/tinydrm/st7586.c
F: Documentation/devicetree/bindings/display/st7586.txt
+DRM DRIVER FOR SITRONIX ST7735R PANELS
+M: David Lechner
+S: Maintained
+F: drivers/gpu/drm/tinydrm/st7735r.c
+F: Documentation/devicetree/bindings/display/st7735r.txt
+
DRM DRIVER FOR TDFX VIDEO CARDS
S: Orphan / Obsolete
F: drivers/gpu/drm/tdfx/
diff --git a/drivers/gpu/drm/tinydrm/Kconfig b/drivers/gpu/drm/tinydrm/Kconfig
index 90c5bd5..b0e567d 100644
--- a/drivers/gpu/drm/tinydrm/Kconfig
+++ b/drivers/gpu/drm/tinydrm/Kconfig
@@ -52,3 +52,13 @@ config TINYDRM_ST7586
* LEGO MINDSTORMS EV3
If M is selected the module will be called st7586.
+
+config TINYDRM_ST7735R
+ tristate "DRM support for Sitronix ST7735R display panels"
+ depends on DRM_TINYDRM && SPI
+ select TINYDRM_MIPI_DBI
+ help
+ DRM driver Sitronix ST7735R with one of the following LCDs:
+ * JD-T18003-T01 1.8" 128x160 TFT
+
+ If M is selected the module will be called st7735r.
diff --git a/drivers/gpu/drm/tinydrm/Makefile b/drivers/gpu/drm/tinydrm/Makefile
index 8aeee53..49a1119 100644
--- a/drivers/gpu/drm/tinydrm/Makefile
+++ b/drivers/gpu/drm/tinydrm/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
obj-$(CONFIG_TINYDRM_ST7586) += st7586.o
+obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o
diff --git a/drivers/gpu/drm/tinydrm/st7735r.c
b/drivers/gpu/drm/tinydrm/st7735r.c
new file mode 100644
index 000..98ff447
--- /dev/null
+++ b/drivers/gpu/drm/tinydrm/st7735r.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Sitronix ST7735R panels
+ *
+ * Copyright 2017 David Lechner
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+#include
+#include
+
+#define ST7735R_FRMCTR10xb1
+#define ST7735R_FRMCTR20xb2
+#define ST7735R_FRMCTR30xb3
+#define ST7735R_INVCTR 0xb4
+#define ST7735R_PWCTR1 0xc0
+#define ST7735R_PWCTR2 0xc1
+#define ST7735R_PWCTR3 0xc2
+#define ST7735R_PWCTR4 0xc3
+#define ST7735R_PWCTR5 0xc4
+#define ST7735R_VMCTR1 0xc5
+#define ST7735R_GAMCTRP1 0xe0
+#define ST7735R_GAMCTRN1 0xe1
+
+#define ST7735R_MY BIT(7)
+#define ST7735R_MX BIT(6)
+#define ST7735R_MV BIT(5)
+
+static void jd_t18003_t01_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state)
+{
+ struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
+ struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
+ struct device *dev = tdev->drm->dev;
+ int ret;
+ u8 addr_mode;
+
+ DRM_DEBUG_KMS("\n");
+
+ mipi_dbi_hw_reset(mipi);
+
+ ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
+ return;
+ }
+
+ msleep(150);
+
+ mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
+ msleep(500);
+
+ mipi_dbi_command(mipi, ST7735R_FRMCTR1, 0x01, 0x2c, 0x2d);
+ mipi_dbi_command(mipi, ST7735R_FRMCTR2, 0x01, 0x2c, 0x2d);
+ mipi_dbi_command(mipi, ST7735R_FRMCTR3, 0x01, 0x2c, 0x2d, 0x01, 0x2c,
+0x2d);
+ mipi_dbi_command(mipi, ST7735R_INVCTR, 0x07);
+ mipi_dbi_command(mipi, ST7735R_PWCTR1, 0xa2, 0x02, 0x84);
+