Add support for the monochrome Sharp Memory LCDs.
Co-developed-by: Mehdi Djait
Signed-off-by: Mehdi Djait
Signed-off-by: Alex Lanzano
---
MAINTAINERS | 6 +
drivers/gpu/drm/tiny/Kconfig| 20 +
drivers/gpu/drm/tiny/Makefile | 1 +
drivers/gpu/drm/tiny/sharp-memory.c | 684
4 files changed, 711 insertions(+)
create mode 100644 drivers/gpu/drm/tiny/sharp-memory.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 71b739b40921..933d7f885d89 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7123,6 +7123,12 @@ S: Maintained
F: Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
F: drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
+DRM DRIVER FOR SHARP MEMORY LCD
+M: Alex Lanzano
+S: Maintained
+F: Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml
+F: drivers/gpu/drm/tiny/sharp-memory.c
+
DRM DRIVER FOR SITRONIX ST7586 PANELS
M: David Lechner
S: Maintained
diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
index f6889f649bc1..bc386954faa2 100644
--- a/drivers/gpu/drm/tiny/Kconfig
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -186,6 +186,26 @@ config TINYDRM_REPAPER
If M is selected the module will be called repaper.
+config TINYDRM_SHARP_MEMORY
+ tristate "DRM support for Sharp Memory LCD panels"
+ depends on DRM && SPI
+ select DRM_GEM_DMA_HELPER
+ select DRM_KMS_HELPER
+ help
+ DRM Driver for the following Sharp Memory Panels:
+ * 1.00" Sharp Memory LCD (LS010B7DH04)
+ * 1.10" Sharp Memory LCD (LS011B7DH03)
+ * 1.20" Sharp Memory LCD (LS012B7DD01)
+ * 1.28" Sharp Memory LCD (LS013B7DH03)
+ * 1.26" Sharp Memory LCD (LS013B7DH05)
+ * 1.80" Sharp Memory LCD (LS018B7DH02)
+ * 2.70" Sharp Memory LCD (LS027B7DH01)
+ * 2.70" Sharp Memory LCD (LS027B7DH01A)
+ * 3.20" Sharp Memory LCD (LS032B7DD02)
+ * 4.40" Sharp Memory LCD (LS044Q7DH01)
+
+ If M is selected the module will be called sharp_memory.
+
config TINYDRM_ST7586
tristate "DRM support for Sitronix ST7586 display panels"
depends on DRM && SPI
diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile
index 76dde89a044b..4aaf56f8707d 100644
--- a/drivers/gpu/drm/tiny/Makefile
+++ b/drivers/gpu/drm/tiny/Makefile
@@ -14,5 +14,6 @@ obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o
obj-$(CONFIG_TINYDRM_ILI9486) += ili9486.o
obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
+obj-$(CONFIG_TINYDRM_SHARP_MEMORY) += sharp-memory.o
obj-$(CONFIG_TINYDRM_ST7586) += st7586.o
obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o
diff --git a/drivers/gpu/drm/tiny/sharp-memory.c
b/drivers/gpu/drm/tiny/sharp-memory.c
new file mode 100644
index ..a2f09fd946b0
--- /dev/null
+++ b/drivers/gpu/drm/tiny/sharp-memory.c
@@ -0,0 +1,684 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define SHARP_MODE_PERIOD 8
+#define SHARP_ADDR_PERIOD 8
+#define SHARP_DUMMY_PERIOD 8
+
+#define SHARP_MEMORY_DISPLAY_MAINTAIN_MODE 0
+#define SHARP_MEMORY_DISPLAY_UPDATE_MODE 1
+#define SHARP_MEMORY_DISPLAY_CLEAR_MODE 4
+
+enum sharp_memory_model {
+ LS010B7DH04,
+ LS011B7DH03,
+ LS012B7DD01,
+ LS013B7DH03,
+ LS013B7DH05,
+ LS018B7DH02,
+ LS027B7DH01,
+ LS027B7DH01A,
+ LS032B7DD02,
+ LS044Q7DH01,
+};
+
+enum sharp_memory_vcom_mode {
+ SHARP_MEMORY_SOFTWARE_VCOM,
+ SHARP_MEMORY_EXTERNAL_VCOM,
+ SHARP_MEMORY_PWM_VCOM
+};
+
+struct sharp_memory_device {
+ struct drm_device drm;
+ struct spi_device *spi;
+
+ const struct drm_display_mode *mode;
+
+ struct drm_crtc crtc;
+ struct drm_plane plane;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+
+ struct gpio_desc *enable_gpio;
+
+ struct task_struct *sw_vcom_signal;
+ struct pwm_device *pwm_vcom_signal;
+
+ enum sharp_memory_vcom_mode vcom_mode;
+ u8 vcom;
+
+ u32 pitch;
+ u32 tx_buffer_size;
+ u8 *tx_buffer;
+
+ /* When vcom_mode == "software" a kthread is used to
+* periodically send a 'maintain display' message over
+* spi. This mutex ensures tx_buffer access and spi bus
+* usage is synchronized in this case
+*/
+ struct mutex tx_mutex;
+};
+
+static inline int sharp_memory_spi_write(struct spi_device *spi, void *buf,
size_t len)
+{
+ /* Reverse the bit order */
+ for (u8 *b = buf; b < ((u8 *)buf) + len; ++b)
+
