video: add STM32 LTDC display controller
The STM32 LTDC display controller provides a parallel digital RGB and
signals for horizontal, vertical synchronization, Pixel Clock and Data
Enable as output to interface directly to a variety of LCD and TFT panels.
The LTDC main features are:
- 24-bit RGB Parallel Pixel Output, Programmable timings & polarity for
HSync, VSync and Data Enable.
- 2 layers with Blending, Color Keying, Window position & size,
Dithering, Background color, Color Look-Up Table (CLUT).
- Supported layer color formats: ARGB8888, RGB888, RGB565, ARGB1555,
ARGB4444, L8 CLUT, AL44 & AL88
This LTDC driver:
- supports: RGB parallel output with timings & polarity, 1 layer
in RGB565.
- supports but with hard-coded configurations: blending, window
position & size (crop), background color.
- does not support yet: rgb888, argb8888, 8-bit clut, dithering.
This LTDC driver is compatible with all stm32 platforms with the
LTDC IP and has been tested on stm32 f746-disco board.
Signed-off-by: Philippe CORNU <philippe.cornu@st.com>
diff --git a/drivers/video/stm32/Kconfig b/drivers/video/stm32/Kconfig
new file mode 100644
index 0000000..113a2bb
--- /dev/null
+++ b/drivers/video/stm32/Kconfig
@@ -0,0 +1,44 @@
+#
+# Copyright (C) STMicroelectronics SA 2017
+#
+# Authors: Philippe Cornu <philippe.cornu@st.com>
+# Yannick Fertre <yannick.fertre@st.com>
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+menuconfig VIDEO_STM32
+ bool "Enable STM32 video support"
+ depends on DM_VIDEO
+ help
+ STM32 supports many video output options including RGB and
+ DSI. This option enables these supports which can be used on
+ devices which have RGB TFT or DSI display connected.
+
+config VIDEO_STM32_MAX_XRES
+ int "Maximum horizontal resolution (for memory allocation purposes)"
+ depends on VIDEO_STM32
+ default 640
+ help
+ The maximum horizontal resolution to support for the framebuffer.
+ This configuration is used for reserving/allocating memory for the
+ framebuffer during device-model binding/probing.
+
+config VIDEO_STM32_MAX_YRES
+ int "Maximum vertical resolution (for memory allocation purposes)"
+ depends on VIDEO_STM32
+ default 480
+ help
+ The maximum vertical resolution to support for the framebuffer.
+ This configuration is used for reserving/allocating memory for the
+ framebuffer during device-model binding/probing.
+
+config VIDEO_STM32_MAX_BPP
+ int "Maximum bits per pixel (for memory allocation purposes)"
+ depends on VIDEO_STM32
+ default 16
+ help
+ The maximum bits per pixel to support for the framebuffer.
+ This configuration is used for reserving/allocating memory for the
+ framebuffer during device-model binding/probing.
+