* [PATCH v4 0/3] drm/panel: Add Ilitek ILI9881c controller driver
@ 2018-05-04 15:23 Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
` (2 more replies)
0 siblings, 3 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: dri-devel, Gustavo Padovan, Daniel Vetter, Maarten Lankhorst,
Sean Paul, linux-kernel
Hi,
Here is the next version of the patches to add the support for the Ilitek
ILI9881c panel controller.
This used to be a part of the larger DSI support series for the Allwinner
SoCs whose patches have been since merged and are obviously not part of
this series anymore.
Let me know what you think,
Maxime
Changes from v4:
- Updated the copyright notice
- Made the init structure const
Changes from v3:
- Rebased on top of current drm-misc-next
- Switched to SPDX license header
- Made the ECC array const
- Split the big DSI patch into two, one to add the DSI driver and one to
add the TCON bits.
- Removed the dithering code
- Changed the DT labels to remove the indices
- Used sleeps instead of delays in the panel driver
- Used the backlight_enable / _disable functions
- Added Chen-Yu's Reviewed-by
Changes from v2:
- Added a ports node under the DSI node
- Changed the huarui panel driver to an ili9881c driver
- Changed the panel vendor to bananapi
- Made the init table static in the panel driver
- Dropped the huarui vendor patch for the DT doc.
Changes from v1:
- Rebased on 4.16-rc1
- Constified a few function arguments and structures
- Reworked the DT binding example a bit
- Reworked the panel driver to check for DSI return codes, and use DCS
helpers when possible
Maxime Ripard (3):
dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
drm/panel: Add Ilitek ILI9881c panel driver
[DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display
Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt | 20 +++-
arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts | 39 ++++++-
drivers/gpu/drm/panel/Kconfig | 9 +-
drivers/gpu/drm/panel/Makefile | 1 +-
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 488 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
5 files changed, 557 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
base-commit: a08fc7c8056e75b08285a2ad955228002dcd86bc
--
git-series 0.9.1
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
2018-05-04 15:23 [PATCH v4 0/3] drm/panel: Add Ilitek ILI9881c controller driver Maxime Ripard
@ 2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: dri-devel, Gustavo Padovan, Daniel Vetter, Maarten Lankhorst,
Sean Paul, linux-kernel
The LHR050H41 from BananaPi is a 1280x700 4-lanes DSI panel based on the
ILI9881c from Ilitek.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
new file mode 100644
index 000000000000..df05e8bb4851
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
@@ -0,0 +1,20 @@
+Ilitek ILI9881c based MIPI-DSI panels
+
+Required properties:
+ - compatible: must be "ilitek,ili9881c" and one of:
+ * "bananapi,lhr050h41"
+ - reg: DSI virtual channel used by that screen
+ - power-gpios: a GPIO phandle for the power pin
+ - reset-gpios: a GPIO phandle for the reset pin
+
+Optional properties:
+ - backlight: phandle to the backlight used
+
+Example:
+panel@0 {
+ compatible = "bananapi,lhr050h41", "ilitek,ili9881c";
+ reg = <0>;
+ power-gpios = <&pio 1 7 GPIO_ACTIVE_HIGH>; /* PB07 */
+ reset-gpios = <&r_pio 0 5 GPIO_ACTIVE_LOW>; /* PL05 */
+ backlight = <&pwm_bl>;
+};
--
git-series 0.9.1
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
@ 2018-05-04 15:23 ` Maxime Ripard
0 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: linux-kernel, dri-devel, Daniel Vetter
The LHR050H41 from BananaPi is a 1280x700 4-lanes DSI panel based on the
ILI9881c from Ilitek.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
new file mode 100644
index 000000000000..df05e8bb4851
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.txt
@@ -0,0 +1,20 @@
+Ilitek ILI9881c based MIPI-DSI panels
+
+Required properties:
+ - compatible: must be "ilitek,ili9881c" and one of:
+ * "bananapi,lhr050h41"
+ - reg: DSI virtual channel used by that screen
+ - power-gpios: a GPIO phandle for the power pin
+ - reset-gpios: a GPIO phandle for the reset pin
+
+Optional properties:
+ - backlight: phandle to the backlight used
+
+Example:
+panel@0 {
+ compatible = "bananapi,lhr050h41", "ilitek,ili9881c";
+ reg = <0>;
+ power-gpios = <&pio 1 7 GPIO_ACTIVE_HIGH>; /* PB07 */
+ reset-gpios = <&r_pio 0 5 GPIO_ACTIVE_LOW>; /* PL05 */
+ backlight = <&pwm_bl>;
+};
--
git-series 0.9.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
2018-05-04 15:23 [PATCH v4 0/3] drm/panel: Add Ilitek ILI9881c controller driver Maxime Ripard
@ 2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: dri-devel, Gustavo Padovan, Daniel Vetter, Maarten Lankhorst,
Sean Paul, linux-kernel
The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
after the other Ilitek controller drivers.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
drivers/gpu/drm/panel/Kconfig | 9 +-
drivers/gpu/drm/panel/Makefile | 1 +-
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 488 +++++++++++++++++++-
3 files changed, 498 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 25682ff3449a..6020c30a33b3 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -46,6 +46,15 @@ config DRM_PANEL_ILITEK_IL9322
Say Y here if you want to enable support for Ilitek IL9322
QVGA (320x240) RGB, YUV and ITU-T BT.656 panels.
+config DRM_PANEL_ILITEK_ILI9881C
+ tristate "Ilitek ILI9881C-based panels"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ help
+ Say Y if you want to enable support for panels based on the
+ Ilitek ILI9881c controller.
+
config DRM_PANEL_INNOLUX_P079ZCA
tristate "Innolux P079ZCA panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index f26efc11d746..5ccaaa9d13af 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_ARM_VERSATILE) += panel-arm-versatile.o
obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
+obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
new file mode 100644
index 000000000000..7c7e308cdb22
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017-2018, Bootlin
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <linux/gpio/consumer.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct ili9881c {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+
+ struct backlight_device *backlight;
+ struct gpio_desc *power;
+ struct gpio_desc *reset;
+};
+
+enum ili9881c_op {
+ ILI9881C_SWITCH_PAGE,
+ ILI9881C_COMMAND,
+};
+
+struct ili9881c_instr {
+ enum ili9881c_op op;
+
+ union arg {
+ struct cmd {
+ u8 cmd;
+ u8 data;
+ } cmd;
+ u8 page;
+ } arg;
+};
+
+#define ILI9881C_SWITCH_PAGE_INSTR(_page) \
+ { \
+ .op = ILI9881C_SWITCH_PAGE, \
+ .arg = { \
+ .page = (_page), \
+ }, \
+ }
+
+#define ILI9881C_COMMAND_INSTR(_cmd, _data) \
+ { \
+ .op = ILI9881C_COMMAND, \
+ .arg = { \
+ .cmd = { \
+ .cmd = (_cmd), \
+ .data = (_data), \
+ }, \
+ }, \
+ }
+
+static const struct ili9881c_instr ili9881c_init[] = {
+ ILI9881C_SWITCH_PAGE_INSTR(3),
+ ILI9881C_COMMAND_INSTR(0x01, 0x00),
+ ILI9881C_COMMAND_INSTR(0x02, 0x00),
+ ILI9881C_COMMAND_INSTR(0x03, 0x73),
+ ILI9881C_COMMAND_INSTR(0x04, 0x03),
+ ILI9881C_COMMAND_INSTR(0x05, 0x00),
+ ILI9881C_COMMAND_INSTR(0x06, 0x06),
+ ILI9881C_COMMAND_INSTR(0x07, 0x06),
+ ILI9881C_COMMAND_INSTR(0x08, 0x00),
+ ILI9881C_COMMAND_INSTR(0x09, 0x18),
+ ILI9881C_COMMAND_INSTR(0x0a, 0x04),
+ ILI9881C_COMMAND_INSTR(0x0b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0c, 0x02),
+ ILI9881C_COMMAND_INSTR(0x0d, 0x03),
+ ILI9881C_COMMAND_INSTR(0x0e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0f, 0x25),
+ ILI9881C_COMMAND_INSTR(0x10, 0x25),
+ ILI9881C_COMMAND_INSTR(0x11, 0x00),
+ ILI9881C_COMMAND_INSTR(0x12, 0x00),
+ ILI9881C_COMMAND_INSTR(0x13, 0x00),
+ ILI9881C_COMMAND_INSTR(0x14, 0x00),
+ ILI9881C_COMMAND_INSTR(0x15, 0x00),
+ ILI9881C_COMMAND_INSTR(0x16, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x17, 0x00),
+ ILI9881C_COMMAND_INSTR(0x18, 0x00),
+ ILI9881C_COMMAND_INSTR(0x19, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1e, 0xC0),
+ ILI9881C_COMMAND_INSTR(0x1f, 0x80),
+ ILI9881C_COMMAND_INSTR(0x20, 0x04),
+ ILI9881C_COMMAND_INSTR(0x21, 0x01),
+ ILI9881C_COMMAND_INSTR(0x22, 0x00),
+ ILI9881C_COMMAND_INSTR(0x23, 0x00),
+ ILI9881C_COMMAND_INSTR(0x24, 0x00),
+ ILI9881C_COMMAND_INSTR(0x25, 0x00),
+ ILI9881C_COMMAND_INSTR(0x26, 0x00),
+ ILI9881C_COMMAND_INSTR(0x27, 0x00),
+ ILI9881C_COMMAND_INSTR(0x28, 0x33),
+ ILI9881C_COMMAND_INSTR(0x29, 0x03),
+ ILI9881C_COMMAND_INSTR(0x2a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2f, 0x00),
+ ILI9881C_COMMAND_INSTR(0x30, 0x00),
+ ILI9881C_COMMAND_INSTR(0x31, 0x00),
+ ILI9881C_COMMAND_INSTR(0x32, 0x00),
+ ILI9881C_COMMAND_INSTR(0x33, 0x00),
+ ILI9881C_COMMAND_INSTR(0x34, 0x04),
+ ILI9881C_COMMAND_INSTR(0x35, 0x00),
+ ILI9881C_COMMAND_INSTR(0x36, 0x00),
+ ILI9881C_COMMAND_INSTR(0x37, 0x00),
+ ILI9881C_COMMAND_INSTR(0x38, 0x3C),
+ ILI9881C_COMMAND_INSTR(0x39, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3f, 0x00),
+ ILI9881C_COMMAND_INSTR(0x40, 0x00),
+ ILI9881C_COMMAND_INSTR(0x41, 0x00),
+ ILI9881C_COMMAND_INSTR(0x42, 0x00),
+ ILI9881C_COMMAND_INSTR(0x43, 0x00),
+ ILI9881C_COMMAND_INSTR(0x44, 0x00),
+ ILI9881C_COMMAND_INSTR(0x50, 0x01),
+ ILI9881C_COMMAND_INSTR(0x51, 0x23),
+ ILI9881C_COMMAND_INSTR(0x52, 0x45),
+ ILI9881C_COMMAND_INSTR(0x53, 0x67),
+ ILI9881C_COMMAND_INSTR(0x54, 0x89),
+ ILI9881C_COMMAND_INSTR(0x55, 0xab),
+ ILI9881C_COMMAND_INSTR(0x56, 0x01),
+ ILI9881C_COMMAND_INSTR(0x57, 0x23),
+ ILI9881C_COMMAND_INSTR(0x58, 0x45),
+ ILI9881C_COMMAND_INSTR(0x59, 0x67),
+ ILI9881C_COMMAND_INSTR(0x5a, 0x89),
+ ILI9881C_COMMAND_INSTR(0x5b, 0xab),
+ ILI9881C_COMMAND_INSTR(0x5c, 0xcd),
+ ILI9881C_COMMAND_INSTR(0x5d, 0xef),
+ ILI9881C_COMMAND_INSTR(0x5e, 0x11),
+ ILI9881C_COMMAND_INSTR(0x5f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x60, 0x02),
+ ILI9881C_COMMAND_INSTR(0x61, 0x02),
+ ILI9881C_COMMAND_INSTR(0x62, 0x02),
+ ILI9881C_COMMAND_INSTR(0x63, 0x02),
+ ILI9881C_COMMAND_INSTR(0x64, 0x02),
+ ILI9881C_COMMAND_INSTR(0x65, 0x02),
+ ILI9881C_COMMAND_INSTR(0x66, 0x02),
+ ILI9881C_COMMAND_INSTR(0x67, 0x02),
+ ILI9881C_COMMAND_INSTR(0x68, 0x02),
+ ILI9881C_COMMAND_INSTR(0x69, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6a, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x6b, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6c, 0x0F),
+ ILI9881C_COMMAND_INSTR(0x6d, 0x0E),
+ ILI9881C_COMMAND_INSTR(0x6e, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x6f, 0x06),
+ ILI9881C_COMMAND_INSTR(0x70, 0x07),
+ ILI9881C_COMMAND_INSTR(0x71, 0x02),
+ ILI9881C_COMMAND_INSTR(0x72, 0x02),
+ ILI9881C_COMMAND_INSTR(0x73, 0x02),
+ ILI9881C_COMMAND_INSTR(0x74, 0x02),
+ ILI9881C_COMMAND_INSTR(0x75, 0x02),
+ ILI9881C_COMMAND_INSTR(0x76, 0x02),
+ ILI9881C_COMMAND_INSTR(0x77, 0x02),
+ ILI9881C_COMMAND_INSTR(0x78, 0x02),
+ ILI9881C_COMMAND_INSTR(0x79, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7a, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7b, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7c, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7d, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7e, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x80, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x81, 0x02),
+ ILI9881C_COMMAND_INSTR(0x82, 0x0F),
+ ILI9881C_COMMAND_INSTR(0x83, 0x0E),
+ ILI9881C_COMMAND_INSTR(0x84, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x85, 0x06),
+ ILI9881C_COMMAND_INSTR(0x86, 0x07),
+ ILI9881C_COMMAND_INSTR(0x87, 0x02),
+ ILI9881C_COMMAND_INSTR(0x88, 0x02),
+ ILI9881C_COMMAND_INSTR(0x89, 0x02),
+ ILI9881C_COMMAND_INSTR(0x8A, 0x02),
+ ILI9881C_SWITCH_PAGE_INSTR(4),
+ ILI9881C_COMMAND_INSTR(0x6C, 0x15),
+ ILI9881C_COMMAND_INSTR(0x6E, 0x22),
+ ILI9881C_COMMAND_INSTR(0x6F, 0x33),
+ ILI9881C_COMMAND_INSTR(0x3A, 0xA4),
+ ILI9881C_COMMAND_INSTR(0x8D, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x87, 0xBA),
+ ILI9881C_COMMAND_INSTR(0x26, 0x76),
+ ILI9881C_COMMAND_INSTR(0xB2, 0xD1),
+ ILI9881C_SWITCH_PAGE_INSTR(1),
+ ILI9881C_COMMAND_INSTR(0x22, 0x0A),
+ ILI9881C_COMMAND_INSTR(0x53, 0xDC),
+ ILI9881C_COMMAND_INSTR(0x55, 0xA7),
+ ILI9881C_COMMAND_INSTR(0x50, 0x78),
+ ILI9881C_COMMAND_INSTR(0x51, 0x78),
+ ILI9881C_COMMAND_INSTR(0x31, 0x02),
+ ILI9881C_COMMAND_INSTR(0x60, 0x14),
+ ILI9881C_COMMAND_INSTR(0xA0, 0x2A),
+ ILI9881C_COMMAND_INSTR(0xA1, 0x39),
+ ILI9881C_COMMAND_INSTR(0xA2, 0x46),
+ ILI9881C_COMMAND_INSTR(0xA3, 0x0e),
+ ILI9881C_COMMAND_INSTR(0xA4, 0x12),
+ ILI9881C_COMMAND_INSTR(0xA5, 0x25),
+ ILI9881C_COMMAND_INSTR(0xA6, 0x19),
+ ILI9881C_COMMAND_INSTR(0xA7, 0x1d),
+ ILI9881C_COMMAND_INSTR(0xA8, 0xa6),
+ ILI9881C_COMMAND_INSTR(0xA9, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xAA, 0x29),
+ ILI9881C_COMMAND_INSTR(0xAB, 0x85),
+ ILI9881C_COMMAND_INSTR(0xAC, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xAD, 0x1B),
+ ILI9881C_COMMAND_INSTR(0xAE, 0x51),
+ ILI9881C_COMMAND_INSTR(0xAF, 0x22),
+ ILI9881C_COMMAND_INSTR(0xB0, 0x2d),
+ ILI9881C_COMMAND_INSTR(0xB1, 0x4f),
+ ILI9881C_COMMAND_INSTR(0xB2, 0x59),
+ ILI9881C_COMMAND_INSTR(0xB3, 0x3F),
+ ILI9881C_COMMAND_INSTR(0xC0, 0x2A),
+ ILI9881C_COMMAND_INSTR(0xC1, 0x3a),
+ ILI9881C_COMMAND_INSTR(0xC2, 0x45),
+ ILI9881C_COMMAND_INSTR(0xC3, 0x0e),
+ ILI9881C_COMMAND_INSTR(0xC4, 0x11),
+ ILI9881C_COMMAND_INSTR(0xC5, 0x24),
+ ILI9881C_COMMAND_INSTR(0xC6, 0x1a),
+ ILI9881C_COMMAND_INSTR(0xC7, 0x1c),
+ ILI9881C_COMMAND_INSTR(0xC8, 0xaa),
+ ILI9881C_COMMAND_INSTR(0xC9, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xCA, 0x29),
+ ILI9881C_COMMAND_INSTR(0xCB, 0x96),
+ ILI9881C_COMMAND_INSTR(0xCC, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xCD, 0x1B),
+ ILI9881C_COMMAND_INSTR(0xCE, 0x51),
+ ILI9881C_COMMAND_INSTR(0xCF, 0x22),
+ ILI9881C_COMMAND_INSTR(0xD0, 0x2b),
+ ILI9881C_COMMAND_INSTR(0xD1, 0x4b),
+ ILI9881C_COMMAND_INSTR(0xD2, 0x59),
+ ILI9881C_COMMAND_INSTR(0xD3, 0x3F),
+};
+
+static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
+{
+ return container_of(panel, struct ili9881c, panel);
+}
+
+static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
+{
+ u8 buf[4] = { 0xff, 0x98, 0x81, page };
+ int ret;
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_send_cmd_data(struct ili9881c *ctx, u8 cmd, u8 data)
+{
+ u8 buf[2] = { cmd, data };
+ int ret;
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_prepare(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+ unsigned int i;
+ int ret;
+
+ /* Power the panel */
+ gpiod_set_value(ctx->power, 1);
+ msleep(5);
+
+ /* And reset it */
+ gpiod_set_value(ctx->reset, 1);
+ msleep(20);
+
+ gpiod_set_value(ctx->reset, 0);
+ msleep(20);
+
+ for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
+ struct ili9881c_instr *instr = &ili9881c_init[i];
+
+ if (instr->op == ILI9881C_SWITCH_PAGE)
+ ret = ili9881c_switch_page(ctx, instr->arg.page);
+ else if (instr->op == ILI9881C_COMMAND)
+ ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
+ instr->arg.cmd.data);
+
+ if (ret)
+ return ret;
+ }
+
+ ret = ili9881c_switch_page(ctx, 0);
+ if (ret)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ if (ret)
+ return ret;
+
+ mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_enable(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ msleep(120);
+
+ mipi_dsi_dcs_set_display_on(ctx->dsi);
+ backlight_enable(ctx->backlight);
+
+ return 0;
+}
+
+static int ili9881c_disable(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ backlight_disable(ctx->backlight);
+ return mipi_dsi_dcs_set_display_off(ctx->dsi);
+}
+
+static int ili9881c_unprepare(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
+ gpiod_set_value(ctx->power, 0);
+ gpiod_set_value(ctx->reset, 1);
+
+ return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+ .clock = 62000,
+ .vrefresh = 60,
+
+ .hdisplay = 720,
+ .hsync_start = 720 + 10,
+ .hsync_end = 720 + 10 + 20,
+ .htotal = 720 + 10 + 20 + 30,
+
+ .vdisplay = 1280,
+ .vsync_start = 1280 + 10,
+ .vsync_end = 1280 + 10 + 10,
+ .vtotal = 1280 + 10 + 10 + 20,
+};
+
+static int ili9881c_get_modes(struct drm_panel *panel)
+{
+ struct drm_connector *connector = panel->connector;
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(panel->drm, &default_mode);
+ if (!mode) {
+ dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ default_mode.vrefresh);
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ panel->connector->display_info.width_mm = 62;
+ panel->connector->display_info.height_mm = 110;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs ili9881c_funcs = {
+ .prepare = ili9881c_prepare,
+ .unprepare = ili9881c_unprepare,
+ .enable = ili9881c_enable,
+ .disable = ili9881c_disable,
+ .get_modes = ili9881c_get_modes,
+};
+
+static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct device_node *np;
+ struct ili9881c *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+ mipi_dsi_set_drvdata(dsi, ctx);
+ ctx->dsi = dsi;
+
+ drm_panel_init(&ctx->panel);
+ ctx->panel.dev = &dsi->dev;
+ ctx->panel.funcs = &ili9881c_funcs;
+
+ ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->power)) {
+ dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
+ return PTR_ERR(ctx->power);
+ }
+
+ ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset)) {
+ dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+ return PTR_ERR(ctx->reset);
+ }
+
+ np = of_parse_phandle(dsi->dev.of_node, "backlight", 0);
+ if (np) {
+ ctx->backlight = of_find_backlight_by_node(np);
+ of_node_put(np);
+
+ if (!ctx->backlight)
+ return -EPROBE_DEFER;
+ }
+
+ ret = drm_panel_add(&ctx->panel);
+ if (ret < 0)
+ return ret;
+
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->lanes = 4;
+
+ return mipi_dsi_attach(dsi);
+}
+
+static int ili9881c_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ struct ili9881c *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_panel_remove(&ctx->panel);
+
+ if (ctx->backlight)
+ put_device(&ctx->backlight->dev);
+
+ return 0;
+}
+
+static const struct of_device_id ili9881c_of_match[] = {
+ { .compatible = "bananapi,lhr050h41" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9881c_of_match);
+
+static struct mipi_dsi_driver ili9881c_dsi_driver = {
+ .probe = ili9881c_dsi_probe,
+ .remove = ili9881c_dsi_remove,
+ .driver = {
+ .name = "ili9881c-dsi",
+ .of_match_table = ili9881c_of_match,
+ },
+};
+module_mipi_dsi_driver(ili9881c_dsi_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Ilitek ILI9881C Controller Driver");
+MODULE_LICENSE("GPL v2");
--
git-series 0.9.1
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
@ 2018-05-04 15:23 ` Maxime Ripard
0 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: linux-kernel, dri-devel, Daniel Vetter
The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
after the other Ilitek controller drivers.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
drivers/gpu/drm/panel/Kconfig | 9 +-
drivers/gpu/drm/panel/Makefile | 1 +-
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 488 +++++++++++++++++++-
3 files changed, 498 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 25682ff3449a..6020c30a33b3 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -46,6 +46,15 @@ config DRM_PANEL_ILITEK_IL9322
Say Y here if you want to enable support for Ilitek IL9322
QVGA (320x240) RGB, YUV and ITU-T BT.656 panels.
+config DRM_PANEL_ILITEK_ILI9881C
+ tristate "Ilitek ILI9881C-based panels"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ help
+ Say Y if you want to enable support for panels based on the
+ Ilitek ILI9881c controller.
+
config DRM_PANEL_INNOLUX_P079ZCA
tristate "Innolux P079ZCA panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index f26efc11d746..5ccaaa9d13af 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_ARM_VERSATILE) += panel-arm-versatile.o
obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
+obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
new file mode 100644
index 000000000000..7c7e308cdb22
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017-2018, Bootlin
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <linux/gpio/consumer.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct ili9881c {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+
+ struct backlight_device *backlight;
+ struct gpio_desc *power;
+ struct gpio_desc *reset;
+};
+
+enum ili9881c_op {
+ ILI9881C_SWITCH_PAGE,
+ ILI9881C_COMMAND,
+};
+
+struct ili9881c_instr {
+ enum ili9881c_op op;
+
+ union arg {
+ struct cmd {
+ u8 cmd;
+ u8 data;
+ } cmd;
+ u8 page;
+ } arg;
+};
+
+#define ILI9881C_SWITCH_PAGE_INSTR(_page) \
+ { \
+ .op = ILI9881C_SWITCH_PAGE, \
+ .arg = { \
+ .page = (_page), \
+ }, \
+ }
+
+#define ILI9881C_COMMAND_INSTR(_cmd, _data) \
+ { \
+ .op = ILI9881C_COMMAND, \
+ .arg = { \
+ .cmd = { \
+ .cmd = (_cmd), \
+ .data = (_data), \
+ }, \
+ }, \
+ }
+
+static const struct ili9881c_instr ili9881c_init[] = {
+ ILI9881C_SWITCH_PAGE_INSTR(3),
+ ILI9881C_COMMAND_INSTR(0x01, 0x00),
+ ILI9881C_COMMAND_INSTR(0x02, 0x00),
+ ILI9881C_COMMAND_INSTR(0x03, 0x73),
+ ILI9881C_COMMAND_INSTR(0x04, 0x03),
+ ILI9881C_COMMAND_INSTR(0x05, 0x00),
+ ILI9881C_COMMAND_INSTR(0x06, 0x06),
+ ILI9881C_COMMAND_INSTR(0x07, 0x06),
+ ILI9881C_COMMAND_INSTR(0x08, 0x00),
+ ILI9881C_COMMAND_INSTR(0x09, 0x18),
+ ILI9881C_COMMAND_INSTR(0x0a, 0x04),
+ ILI9881C_COMMAND_INSTR(0x0b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0c, 0x02),
+ ILI9881C_COMMAND_INSTR(0x0d, 0x03),
+ ILI9881C_COMMAND_INSTR(0x0e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0f, 0x25),
+ ILI9881C_COMMAND_INSTR(0x10, 0x25),
+ ILI9881C_COMMAND_INSTR(0x11, 0x00),
+ ILI9881C_COMMAND_INSTR(0x12, 0x00),
+ ILI9881C_COMMAND_INSTR(0x13, 0x00),
+ ILI9881C_COMMAND_INSTR(0x14, 0x00),
+ ILI9881C_COMMAND_INSTR(0x15, 0x00),
+ ILI9881C_COMMAND_INSTR(0x16, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x17, 0x00),
+ ILI9881C_COMMAND_INSTR(0x18, 0x00),
+ ILI9881C_COMMAND_INSTR(0x19, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1e, 0xC0),
+ ILI9881C_COMMAND_INSTR(0x1f, 0x80),
+ ILI9881C_COMMAND_INSTR(0x20, 0x04),
+ ILI9881C_COMMAND_INSTR(0x21, 0x01),
+ ILI9881C_COMMAND_INSTR(0x22, 0x00),
+ ILI9881C_COMMAND_INSTR(0x23, 0x00),
+ ILI9881C_COMMAND_INSTR(0x24, 0x00),
+ ILI9881C_COMMAND_INSTR(0x25, 0x00),
+ ILI9881C_COMMAND_INSTR(0x26, 0x00),
+ ILI9881C_COMMAND_INSTR(0x27, 0x00),
+ ILI9881C_COMMAND_INSTR(0x28, 0x33),
+ ILI9881C_COMMAND_INSTR(0x29, 0x03),
+ ILI9881C_COMMAND_INSTR(0x2a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2f, 0x00),
+ ILI9881C_COMMAND_INSTR(0x30, 0x00),
+ ILI9881C_COMMAND_INSTR(0x31, 0x00),
+ ILI9881C_COMMAND_INSTR(0x32, 0x00),
+ ILI9881C_COMMAND_INSTR(0x33, 0x00),
+ ILI9881C_COMMAND_INSTR(0x34, 0x04),
+ ILI9881C_COMMAND_INSTR(0x35, 0x00),
+ ILI9881C_COMMAND_INSTR(0x36, 0x00),
+ ILI9881C_COMMAND_INSTR(0x37, 0x00),
+ ILI9881C_COMMAND_INSTR(0x38, 0x3C),
+ ILI9881C_COMMAND_INSTR(0x39, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3f, 0x00),
+ ILI9881C_COMMAND_INSTR(0x40, 0x00),
+ ILI9881C_COMMAND_INSTR(0x41, 0x00),
+ ILI9881C_COMMAND_INSTR(0x42, 0x00),
+ ILI9881C_COMMAND_INSTR(0x43, 0x00),
+ ILI9881C_COMMAND_INSTR(0x44, 0x00),
+ ILI9881C_COMMAND_INSTR(0x50, 0x01),
+ ILI9881C_COMMAND_INSTR(0x51, 0x23),
+ ILI9881C_COMMAND_INSTR(0x52, 0x45),
+ ILI9881C_COMMAND_INSTR(0x53, 0x67),
+ ILI9881C_COMMAND_INSTR(0x54, 0x89),
+ ILI9881C_COMMAND_INSTR(0x55, 0xab),
+ ILI9881C_COMMAND_INSTR(0x56, 0x01),
+ ILI9881C_COMMAND_INSTR(0x57, 0x23),
+ ILI9881C_COMMAND_INSTR(0x58, 0x45),
+ ILI9881C_COMMAND_INSTR(0x59, 0x67),
+ ILI9881C_COMMAND_INSTR(0x5a, 0x89),
+ ILI9881C_COMMAND_INSTR(0x5b, 0xab),
+ ILI9881C_COMMAND_INSTR(0x5c, 0xcd),
+ ILI9881C_COMMAND_INSTR(0x5d, 0xef),
+ ILI9881C_COMMAND_INSTR(0x5e, 0x11),
+ ILI9881C_COMMAND_INSTR(0x5f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x60, 0x02),
+ ILI9881C_COMMAND_INSTR(0x61, 0x02),
+ ILI9881C_COMMAND_INSTR(0x62, 0x02),
+ ILI9881C_COMMAND_INSTR(0x63, 0x02),
+ ILI9881C_COMMAND_INSTR(0x64, 0x02),
+ ILI9881C_COMMAND_INSTR(0x65, 0x02),
+ ILI9881C_COMMAND_INSTR(0x66, 0x02),
+ ILI9881C_COMMAND_INSTR(0x67, 0x02),
+ ILI9881C_COMMAND_INSTR(0x68, 0x02),
+ ILI9881C_COMMAND_INSTR(0x69, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6a, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x6b, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6c, 0x0F),
+ ILI9881C_COMMAND_INSTR(0x6d, 0x0E),
+ ILI9881C_COMMAND_INSTR(0x6e, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x6f, 0x06),
+ ILI9881C_COMMAND_INSTR(0x70, 0x07),
+ ILI9881C_COMMAND_INSTR(0x71, 0x02),
+ ILI9881C_COMMAND_INSTR(0x72, 0x02),
+ ILI9881C_COMMAND_INSTR(0x73, 0x02),
+ ILI9881C_COMMAND_INSTR(0x74, 0x02),
+ ILI9881C_COMMAND_INSTR(0x75, 0x02),
+ ILI9881C_COMMAND_INSTR(0x76, 0x02),
+ ILI9881C_COMMAND_INSTR(0x77, 0x02),
+ ILI9881C_COMMAND_INSTR(0x78, 0x02),
+ ILI9881C_COMMAND_INSTR(0x79, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7a, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7b, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7c, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7d, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7e, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x80, 0x0C),
+ ILI9881C_COMMAND_INSTR(0x81, 0x02),
+ ILI9881C_COMMAND_INSTR(0x82, 0x0F),
+ ILI9881C_COMMAND_INSTR(0x83, 0x0E),
+ ILI9881C_COMMAND_INSTR(0x84, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x85, 0x06),
+ ILI9881C_COMMAND_INSTR(0x86, 0x07),
+ ILI9881C_COMMAND_INSTR(0x87, 0x02),
+ ILI9881C_COMMAND_INSTR(0x88, 0x02),
+ ILI9881C_COMMAND_INSTR(0x89, 0x02),
+ ILI9881C_COMMAND_INSTR(0x8A, 0x02),
+ ILI9881C_SWITCH_PAGE_INSTR(4),
+ ILI9881C_COMMAND_INSTR(0x6C, 0x15),
+ ILI9881C_COMMAND_INSTR(0x6E, 0x22),
+ ILI9881C_COMMAND_INSTR(0x6F, 0x33),
+ ILI9881C_COMMAND_INSTR(0x3A, 0xA4),
+ ILI9881C_COMMAND_INSTR(0x8D, 0x0D),
+ ILI9881C_COMMAND_INSTR(0x87, 0xBA),
+ ILI9881C_COMMAND_INSTR(0x26, 0x76),
+ ILI9881C_COMMAND_INSTR(0xB2, 0xD1),
+ ILI9881C_SWITCH_PAGE_INSTR(1),
+ ILI9881C_COMMAND_INSTR(0x22, 0x0A),
+ ILI9881C_COMMAND_INSTR(0x53, 0xDC),
+ ILI9881C_COMMAND_INSTR(0x55, 0xA7),
+ ILI9881C_COMMAND_INSTR(0x50, 0x78),
+ ILI9881C_COMMAND_INSTR(0x51, 0x78),
+ ILI9881C_COMMAND_INSTR(0x31, 0x02),
+ ILI9881C_COMMAND_INSTR(0x60, 0x14),
+ ILI9881C_COMMAND_INSTR(0xA0, 0x2A),
+ ILI9881C_COMMAND_INSTR(0xA1, 0x39),
+ ILI9881C_COMMAND_INSTR(0xA2, 0x46),
+ ILI9881C_COMMAND_INSTR(0xA3, 0x0e),
+ ILI9881C_COMMAND_INSTR(0xA4, 0x12),
+ ILI9881C_COMMAND_INSTR(0xA5, 0x25),
+ ILI9881C_COMMAND_INSTR(0xA6, 0x19),
+ ILI9881C_COMMAND_INSTR(0xA7, 0x1d),
+ ILI9881C_COMMAND_INSTR(0xA8, 0xa6),
+ ILI9881C_COMMAND_INSTR(0xA9, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xAA, 0x29),
+ ILI9881C_COMMAND_INSTR(0xAB, 0x85),
+ ILI9881C_COMMAND_INSTR(0xAC, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xAD, 0x1B),
+ ILI9881C_COMMAND_INSTR(0xAE, 0x51),
+ ILI9881C_COMMAND_INSTR(0xAF, 0x22),
+ ILI9881C_COMMAND_INSTR(0xB0, 0x2d),
+ ILI9881C_COMMAND_INSTR(0xB1, 0x4f),
+ ILI9881C_COMMAND_INSTR(0xB2, 0x59),
+ ILI9881C_COMMAND_INSTR(0xB3, 0x3F),
+ ILI9881C_COMMAND_INSTR(0xC0, 0x2A),
+ ILI9881C_COMMAND_INSTR(0xC1, 0x3a),
+ ILI9881C_COMMAND_INSTR(0xC2, 0x45),
+ ILI9881C_COMMAND_INSTR(0xC3, 0x0e),
+ ILI9881C_COMMAND_INSTR(0xC4, 0x11),
+ ILI9881C_COMMAND_INSTR(0xC5, 0x24),
+ ILI9881C_COMMAND_INSTR(0xC6, 0x1a),
+ ILI9881C_COMMAND_INSTR(0xC7, 0x1c),
+ ILI9881C_COMMAND_INSTR(0xC8, 0xaa),
+ ILI9881C_COMMAND_INSTR(0xC9, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xCA, 0x29),
+ ILI9881C_COMMAND_INSTR(0xCB, 0x96),
+ ILI9881C_COMMAND_INSTR(0xCC, 0x1C),
+ ILI9881C_COMMAND_INSTR(0xCD, 0x1B),
+ ILI9881C_COMMAND_INSTR(0xCE, 0x51),
+ ILI9881C_COMMAND_INSTR(0xCF, 0x22),
+ ILI9881C_COMMAND_INSTR(0xD0, 0x2b),
+ ILI9881C_COMMAND_INSTR(0xD1, 0x4b),
+ ILI9881C_COMMAND_INSTR(0xD2, 0x59),
+ ILI9881C_COMMAND_INSTR(0xD3, 0x3F),
+};
+
+static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
+{
+ return container_of(panel, struct ili9881c, panel);
+}
+
+static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
+{
+ u8 buf[4] = { 0xff, 0x98, 0x81, page };
+ int ret;
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_send_cmd_data(struct ili9881c *ctx, u8 cmd, u8 data)
+{
+ u8 buf[2] = { cmd, data };
+ int ret;
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_prepare(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+ unsigned int i;
+ int ret;
+
+ /* Power the panel */
+ gpiod_set_value(ctx->power, 1);
+ msleep(5);
+
+ /* And reset it */
+ gpiod_set_value(ctx->reset, 1);
+ msleep(20);
+
+ gpiod_set_value(ctx->reset, 0);
+ msleep(20);
+
+ for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
+ struct ili9881c_instr *instr = &ili9881c_init[i];
+
+ if (instr->op == ILI9881C_SWITCH_PAGE)
+ ret = ili9881c_switch_page(ctx, instr->arg.page);
+ else if (instr->op == ILI9881C_COMMAND)
+ ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
+ instr->arg.cmd.data);
+
+ if (ret)
+ return ret;
+ }
+
+ ret = ili9881c_switch_page(ctx, 0);
+ if (ret)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ if (ret)
+ return ret;
+
+ mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ili9881c_enable(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ msleep(120);
+
+ mipi_dsi_dcs_set_display_on(ctx->dsi);
+ backlight_enable(ctx->backlight);
+
+ return 0;
+}
+
+static int ili9881c_disable(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ backlight_disable(ctx->backlight);
+ return mipi_dsi_dcs_set_display_off(ctx->dsi);
+}
+
+static int ili9881c_unprepare(struct drm_panel *panel)
+{
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+
+ mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
+ gpiod_set_value(ctx->power, 0);
+ gpiod_set_value(ctx->reset, 1);
+
+ return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+ .clock = 62000,
+ .vrefresh = 60,
+
+ .hdisplay = 720,
+ .hsync_start = 720 + 10,
+ .hsync_end = 720 + 10 + 20,
+ .htotal = 720 + 10 + 20 + 30,
+
+ .vdisplay = 1280,
+ .vsync_start = 1280 + 10,
+ .vsync_end = 1280 + 10 + 10,
+ .vtotal = 1280 + 10 + 10 + 20,
+};
+
+static int ili9881c_get_modes(struct drm_panel *panel)
+{
+ struct drm_connector *connector = panel->connector;
+ struct ili9881c *ctx = panel_to_ili9881c(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(panel->drm, &default_mode);
+ if (!mode) {
+ dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ default_mode.vrefresh);
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ panel->connector->display_info.width_mm = 62;
+ panel->connector->display_info.height_mm = 110;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs ili9881c_funcs = {
+ .prepare = ili9881c_prepare,
+ .unprepare = ili9881c_unprepare,
+ .enable = ili9881c_enable,
+ .disable = ili9881c_disable,
+ .get_modes = ili9881c_get_modes,
+};
+
+static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct device_node *np;
+ struct ili9881c *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+ mipi_dsi_set_drvdata(dsi, ctx);
+ ctx->dsi = dsi;
+
+ drm_panel_init(&ctx->panel);
+ ctx->panel.dev = &dsi->dev;
+ ctx->panel.funcs = &ili9881c_funcs;
+
+ ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->power)) {
+ dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
+ return PTR_ERR(ctx->power);
+ }
+
+ ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset)) {
+ dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+ return PTR_ERR(ctx->reset);
+ }
+
+ np = of_parse_phandle(dsi->dev.of_node, "backlight", 0);
+ if (np) {
+ ctx->backlight = of_find_backlight_by_node(np);
+ of_node_put(np);
+
+ if (!ctx->backlight)
+ return -EPROBE_DEFER;
+ }
+
+ ret = drm_panel_add(&ctx->panel);
+ if (ret < 0)
+ return ret;
+
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->lanes = 4;
+
+ return mipi_dsi_attach(dsi);
+}
+
+static int ili9881c_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ struct ili9881c *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_panel_remove(&ctx->panel);
+
+ if (ctx->backlight)
+ put_device(&ctx->backlight->dev);
+
+ return 0;
+}
+
+static const struct of_device_id ili9881c_of_match[] = {
+ { .compatible = "bananapi,lhr050h41" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9881c_of_match);
+
+static struct mipi_dsi_driver ili9881c_dsi_driver = {
+ .probe = ili9881c_dsi_probe,
+ .remove = ili9881c_dsi_remove,
+ .driver = {
+ .name = "ili9881c-dsi",
+ .of_match_table = ili9881c_of_match,
+ },
+};
+module_mipi_dsi_driver(ili9881c_dsi_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Ilitek ILI9881C Controller Driver");
+MODULE_LICENSE("GPL v2");
--
git-series 0.9.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [PATCH v4 3/3] [DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display
2018-05-04 15:23 [PATCH v4 0/3] drm/panel: Add Ilitek ILI9881c controller driver Maxime Ripard
@ 2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: dri-devel, Gustavo Padovan, Daniel Vetter, Maarten Lankhorst,
Sean Paul, linux-kernel
The BananaPi M2M has an optional 1280x720 DSI panel. Since that panel is
optional, we can only show a DT patch that would show how to enable it.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts | 39 +++++++++++++++++++++-
1 file changed, 39 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
index eaf09666720d..30e710e94912 100644
--- a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
+++ b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
@@ -44,6 +44,7 @@
#include "sun8i-a33.dtsi"
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pwm/pwm.h>
/ {
model = "BananaPi M2 Magic";
@@ -81,6 +82,14 @@
};
};
+ pwm_bl: backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+ brightness-levels = <1 2 4 8 16 32 64 128 255>;
+ default-brightness-level = <8>;
+ enable-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PG10 */
+ };
+
reg_vcc5v0: vcc5v0 {
compatible = "regulator-fixed";
regulator-name = "vcc5v0";
@@ -120,6 +129,26 @@
status = "okay";
};
+&de {
+ status = "okay";
+};
+
+&dphy {
+ status = "okay";
+};
+
+&dsi {
+ status = "okay";
+
+ panel@0 {
+ compatible = "bananapi,lhr050h41", "ilitek,ili9881c";
+ reg = <0>;
+ power-gpios = <&pio 1 7 GPIO_ACTIVE_HIGH>; /* PB07 */
+ reset-gpios = <&r_pio 0 5 GPIO_ACTIVE_LOW>; /* PL05 */
+ backlight = <&pwm_bl>;
+ };
+};
+
&ehci0 {
status = "okay";
};
@@ -179,6 +208,12 @@
status = "okay";
};
+&pwm {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm0_pins>;
+ status = "okay";
+};
+
&r_rsb {
status = "okay";
@@ -291,6 +326,10 @@
status = "okay";
};
+&tcon0 {
+ status = "okay";
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_b>;
--
git-series 0.9.1
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [PATCH v4 3/3] [DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display
@ 2018-05-04 15:23 ` Maxime Ripard
0 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-04 15:23 UTC (permalink / raw)
To: Thierry Reding, Chen-Yu Tsai, Maxime Ripard
Cc: linux-kernel, dri-devel, Daniel Vetter
The BananaPi M2M has an optional 1280x720 DSI panel. Since that panel is
optional, we can only show a DT patch that would show how to enable it.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts | 39 +++++++++++++++++++++-
1 file changed, 39 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
index eaf09666720d..30e710e94912 100644
--- a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
+++ b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
@@ -44,6 +44,7 @@
#include "sun8i-a33.dtsi"
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pwm/pwm.h>
/ {
model = "BananaPi M2 Magic";
@@ -81,6 +82,14 @@
};
};
+ pwm_bl: backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+ brightness-levels = <1 2 4 8 16 32 64 128 255>;
+ default-brightness-level = <8>;
+ enable-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PG10 */
+ };
+
reg_vcc5v0: vcc5v0 {
compatible = "regulator-fixed";
regulator-name = "vcc5v0";
@@ -120,6 +129,26 @@
status = "okay";
};
+&de {
+ status = "okay";
+};
+
+&dphy {
+ status = "okay";
+};
+
+&dsi {
+ status = "okay";
+
+ panel@0 {
+ compatible = "bananapi,lhr050h41", "ilitek,ili9881c";
+ reg = <0>;
+ power-gpios = <&pio 1 7 GPIO_ACTIVE_HIGH>; /* PB07 */
+ reset-gpios = <&r_pio 0 5 GPIO_ACTIVE_LOW>; /* PL05 */
+ backlight = <&pwm_bl>;
+ };
+};
+
&ehci0 {
status = "okay";
};
@@ -179,6 +208,12 @@
status = "okay";
};
+&pwm {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm0_pins>;
+ status = "okay";
+};
+
&r_rsb {
status = "okay";
@@ -291,6 +326,10 @@
status = "okay";
};
+&tcon0 {
+ status = "okay";
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_b>;
--
git-series 0.9.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
2018-05-04 15:23 ` Maxime Ripard
@ 2018-05-05 3:48 ` kbuild test robot
-1 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 3:48 UTC (permalink / raw)
To: Maxime Ripard
Cc: kbuild-all, Thierry Reding, Chen-Yu Tsai, Maxime Ripard,
linux-kernel, dri-devel, Daniel Vetter
[-- Attachment #1: Type: text/plain, Size: 2408 bytes --]
Hi Maxime,
I love your patch! Perhaps something to improve:
[auto build test WARNING on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sh
All warnings (new ones prefixed by >>):
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c: In function 'ili9881c_prepare':
>> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:34: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
struct ili9881c_instr *instr = &ili9881c_init[i];
^
vim +/const +303 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
284
285 static int ili9881c_prepare(struct drm_panel *panel)
286 {
287 struct ili9881c *ctx = panel_to_ili9881c(panel);
288 unsigned int i;
289 int ret;
290
291 /* Power the panel */
292 gpiod_set_value(ctx->power, 1);
293 msleep(5);
294
295 /* And reset it */
296 gpiod_set_value(ctx->reset, 1);
297 msleep(20);
298
299 gpiod_set_value(ctx->reset, 0);
300 msleep(20);
301
302 for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
> 303 struct ili9881c_instr *instr = &ili9881c_init[i];
304
305 if (instr->op == ILI9881C_SWITCH_PAGE)
306 ret = ili9881c_switch_page(ctx, instr->arg.page);
307 else if (instr->op == ILI9881C_COMMAND)
308 ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
309 instr->arg.cmd.data);
310
311 if (ret)
312 return ret;
313 }
314
315 ret = ili9881c_switch_page(ctx, 0);
316 if (ret)
317 return ret;
318
319 ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
320 if (ret)
321 return ret;
322
323 mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
324 if (ret)
325 return ret;
326
327 return 0;
328 }
329
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 48088 bytes --]
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
@ 2018-05-05 3:48 ` kbuild test robot
0 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 3:48 UTC (permalink / raw)
Cc: Maxime Ripard, linux-kernel, dri-devel, Chen-Yu Tsai,
Thierry Reding, kbuild-all, Daniel Vetter
[-- Attachment #1: Type: text/plain, Size: 2408 bytes --]
Hi Maxime,
I love your patch! Perhaps something to improve:
[auto build test WARNING on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sh
All warnings (new ones prefixed by >>):
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c: In function 'ili9881c_prepare':
>> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:34: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
struct ili9881c_instr *instr = &ili9881c_init[i];
^
vim +/const +303 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
284
285 static int ili9881c_prepare(struct drm_panel *panel)
286 {
287 struct ili9881c *ctx = panel_to_ili9881c(panel);
288 unsigned int i;
289 int ret;
290
291 /* Power the panel */
292 gpiod_set_value(ctx->power, 1);
293 msleep(5);
294
295 /* And reset it */
296 gpiod_set_value(ctx->reset, 1);
297 msleep(20);
298
299 gpiod_set_value(ctx->reset, 0);
300 msleep(20);
301
302 for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
> 303 struct ili9881c_instr *instr = &ili9881c_init[i];
304
305 if (instr->op == ILI9881C_SWITCH_PAGE)
306 ret = ili9881c_switch_page(ctx, instr->arg.page);
307 else if (instr->op == ILI9881C_COMMAND)
308 ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
309 instr->arg.cmd.data);
310
311 if (ret)
312 return ret;
313 }
314
315 ret = ili9881c_switch_page(ctx, 0);
316 if (ret)
317 return ret;
318
319 ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
320 if (ret)
321 return ret;
322
323 mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
324 if (ret)
325 return ret;
326
327 return 0;
328 }
329
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 48088 bytes --]
[-- Attachment #3: Type: text/plain, Size: 160 bytes --]
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 3/3] [DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display
2018-05-04 15:23 ` Maxime Ripard
@ 2018-05-05 7:15 ` kbuild test robot
-1 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 7:15 UTC (permalink / raw)
To: Maxime Ripard
Cc: kbuild-all, Thierry Reding, Chen-Yu Tsai, Maxime Ripard,
linux-kernel, dri-devel, Daniel Vetter
[-- Attachment #1: Type: text/plain, Size: 1000 bytes --]
Hi Maxime,
I love your patch! Yet something to improve:
[auto build test ERROR on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
config: arm-at91_dt_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All errors (new ones prefixed by >>):
>> Error: arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts:136.1-6 Label or path dphy not found
>> Error: arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts:140.1-5 Label or path dsi not found
>> FATAL ERROR: Syntax error parsing input tree
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 23733 bytes --]
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 3/3] [DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display
@ 2018-05-05 7:15 ` kbuild test robot
0 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 7:15 UTC (permalink / raw)
Cc: Maxime Ripard, linux-kernel, dri-devel, Chen-Yu Tsai,
Thierry Reding, kbuild-all, Daniel Vetter
[-- Attachment #1: Type: text/plain, Size: 1000 bytes --]
Hi Maxime,
I love your patch! Yet something to improve:
[auto build test ERROR on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
config: arm-at91_dt_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All errors (new ones prefixed by >>):
>> Error: arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts:136.1-6 Label or path dphy not found
>> Error: arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts:140.1-5 Label or path dsi not found
>> FATAL ERROR: Syntax error parsing input tree
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 23733 bytes --]
[-- Attachment #3: Type: text/plain, Size: 160 bytes --]
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
2018-05-04 15:23 ` Maxime Ripard
@ 2018-05-05 7:15 ` kbuild test robot
-1 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 7:15 UTC (permalink / raw)
To: Maxime Ripard
Cc: kbuild-all, Thierry Reding, Chen-Yu Tsai, Maxime Ripard,
linux-kernel, dri-devel, Daniel Vetter
Hi Maxime,
I love your patch! Perhaps something to improve:
[auto build test WARNING on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: sparse: incorrect type in initializer (different modifiers) @@ expected struct ili9881c_instr *instr @@ got structstruct ili9881c_instr *instr @@
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: expected struct ili9881c_instr *instr
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: got struct ili9881c_instr const *
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c: In function 'ili9881c_prepare':
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:34: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
struct ili9881c_instr *instr = &ili9881c_init[i];
^
vim +303 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
284
285 static int ili9881c_prepare(struct drm_panel *panel)
286 {
287 struct ili9881c *ctx = panel_to_ili9881c(panel);
288 unsigned int i;
289 int ret;
290
291 /* Power the panel */
292 gpiod_set_value(ctx->power, 1);
293 msleep(5);
294
295 /* And reset it */
296 gpiod_set_value(ctx->reset, 1);
297 msleep(20);
298
299 gpiod_set_value(ctx->reset, 0);
300 msleep(20);
301
302 for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
> 303 struct ili9881c_instr *instr = &ili9881c_init[i];
304
305 if (instr->op == ILI9881C_SWITCH_PAGE)
306 ret = ili9881c_switch_page(ctx, instr->arg.page);
307 else if (instr->op == ILI9881C_COMMAND)
308 ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
309 instr->arg.cmd.data);
310
311 if (ret)
312 return ret;
313 }
314
315 ret = ili9881c_switch_page(ctx, 0);
316 if (ret)
317 return ret;
318
319 ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
320 if (ret)
321 return ret;
322
323 mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
324 if (ret)
325 return ret;
326
327 return 0;
328 }
329
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
@ 2018-05-05 7:15 ` kbuild test robot
0 siblings, 0 replies; 20+ messages in thread
From: kbuild test robot @ 2018-05-05 7:15 UTC (permalink / raw)
Cc: Maxime Ripard, linux-kernel, dri-devel, Chen-Yu Tsai,
Thierry Reding, kbuild-all, Daniel Vetter
Hi Maxime,
I love your patch! Perhaps something to improve:
[auto build test WARNING on ]
url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031
base:
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: sparse: incorrect type in initializer (different modifiers) @@ expected struct ili9881c_instr *instr @@ got structstruct ili9881c_instr *instr @@
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: expected struct ili9881c_instr *instr
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:62: got struct ili9881c_instr const *
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c: In function 'ili9881c_prepare':
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:34: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
struct ili9881c_instr *instr = &ili9881c_init[i];
^
vim +303 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
284
285 static int ili9881c_prepare(struct drm_panel *panel)
286 {
287 struct ili9881c *ctx = panel_to_ili9881c(panel);
288 unsigned int i;
289 int ret;
290
291 /* Power the panel */
292 gpiod_set_value(ctx->power, 1);
293 msleep(5);
294
295 /* And reset it */
296 gpiod_set_value(ctx->reset, 1);
297 msleep(20);
298
299 gpiod_set_value(ctx->reset, 0);
300 msleep(20);
301
302 for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) {
> 303 struct ili9881c_instr *instr = &ili9881c_init[i];
304
305 if (instr->op == ILI9881C_SWITCH_PAGE)
306 ret = ili9881c_switch_page(ctx, instr->arg.page);
307 else if (instr->op == ILI9881C_COMMAND)
308 ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
309 instr->arg.cmd.data);
310
311 if (ret)
312 return ret;
313 }
314
315 ret = ili9881c_switch_page(ctx, 0);
316 if (ret)
317 return ret;
318
319 ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
320 if (ret)
321 return ret;
322
323 mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
324 if (ret)
325 return ret;
326
327 return 0;
328 }
329
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
2018-05-04 15:23 ` Maxime Ripard
@ 2018-05-11 15:40 ` Linus Walleij
-1 siblings, 0 replies; 20+ messages in thread
From: Linus Walleij @ 2018-05-11 15:40 UTC (permalink / raw)
To: Maxime Ripard
Cc: Thierry Reding, Chen-Yu Tsai, linux-kernel,
open list:DRM PANEL DRIVERS, Daniel Vetter
On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> The LHR050H41 from BananaPi is a 1280x700 4-lanes DSI panel based on the
> ILI9881c from Ilitek.
>
> Acked-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
@ 2018-05-11 15:40 ` Linus Walleij
0 siblings, 0 replies; 20+ messages in thread
From: Linus Walleij @ 2018-05-11 15:40 UTC (permalink / raw)
To: Maxime Ripard
Cc: Daniel Vetter, Chen-Yu Tsai, Thierry Reding, linux-kernel,
open list:DRM PANEL DRIVERS
On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> The LHR050H41 from BananaPi is a 1280x700 4-lanes DSI panel based on the
> ILI9881c from Ilitek.
>
> Acked-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
2018-05-04 15:23 ` Maxime Ripard
@ 2018-05-11 15:54 ` Linus Walleij
-1 siblings, 0 replies; 20+ messages in thread
From: Linus Walleij @ 2018-05-11 15:54 UTC (permalink / raw)
To: Maxime Ripard
Cc: Thierry Reding, Chen-Yu Tsai, open list:DRM PANEL DRIVERS,
Gustavo Padovan, Daniel Vetter, Maarten Lankhorst, Sean Paul,
linux-kernel
Hi Maxime,
sorry that noone had much time to look at the driver.
But I can help out, hopefully.
On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
> based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
> after the other Ilitek controller drivers.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Nice, I have some experience with those.
> +config DRM_PANEL_ILITEK_ILI9881C
> + tristate "Ilitek ILI9881C-based panels"
> + depends on OF
> + depends on DRM_MIPI_DSI
> + depends on BACKLIGHT_CLASS_DEVICE
If it absolutely needs DRM_MIPI_DSI and
BACKLIGHT_CLASS_DEVICE it maybe you should
be more helpful to the user to just select it?
Depending on OF is fine, that is more of a platform
property.
> +struct ili9881c {
> + struct drm_panel panel;
> + struct mipi_dsi_device *dsi;
> +
> + struct backlight_device *backlight;
> + struct gpio_desc *power;
Should this not be modeled using a fixed regulator instead?
> + struct gpio_desc *reset;
> +};
> +enum ili9881c_op {
> + ILI9881C_SWITCH_PAGE,
> + ILI9881C_COMMAND,
> +};
> +
> +struct ili9881c_instr {
> + enum ili9881c_op op;
> +
> + union arg {
> + struct cmd {
> + u8 cmd;
> + u8 data;
> + } cmd;
> + u8 page;
> + } arg;
> +};
> +
> +#define ILI9881C_SWITCH_PAGE_INSTR(_page) \
> + { \
> + .op = ILI9881C_SWITCH_PAGE, \
> + .arg = { \
> + .page = (_page), \
> + }, \
> + }
> +
> +#define ILI9881C_COMMAND_INSTR(_cmd, _data) \
> + { \
> + .op = ILI9881C_COMMAND, \
> + .arg = { \
> + .cmd = { \
> + .cmd = (_cmd), \
> + .data = (_data), \
> + }, \
> + }, \
> + }
That looks clever.
> +static const struct ili9881c_instr ili9881c_init[] = {
> + ILI9881C_SWITCH_PAGE_INSTR(3),
> + ILI9881C_COMMAND_INSTR(0x01, 0x00),
> + ILI9881C_COMMAND_INSTR(0x02, 0x00),
> + ILI9881C_COMMAND_INSTR(0x03, 0x73),
> + ILI9881C_COMMAND_INSTR(0x04, 0x03),
> + ILI9881C_COMMAND_INSTR(0x05, 0x00),
> + ILI9881C_COMMAND_INSTR(0x06, 0x06),
> + ILI9881C_COMMAND_INSTR(0x07, 0x06),
(...)
This is a bit hard to understand to say the least. If this comes from
a datasheet some more elaborate construction of the commands
would be nice, maybe using some #defines?
If this just comes from some code drop or reverse engineering,
OK bad luck, I can live with it :)
It looks a bit like you're uploading a small firmware.
> +static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
> +{
> + u8 buf[4] = { 0xff, 0x98, 0x81, page };
That is also a bit unclear wrt what is going on.
> +static int ili9881c_prepare(struct drm_panel *panel)
> +{
> + struct ili9881c *ctx = panel_to_ili9881c(panel);
> + unsigned int i;
> + int ret;
> +
> + /* Power the panel */
> + gpiod_set_value(ctx->power, 1);
> + msleep(5);
So isn't this a fixed regulator using a GPIO?
> +static const struct drm_display_mode default_mode = {
> + .clock = 62000,
> + .vrefresh = 60,
> +
> + .hdisplay = 720,
> + .hsync_start = 720 + 10,
> + .hsync_end = 720 + 10 + 20,
> + .htotal = 720 + 10 + 20 + 30,
> +
> + .vdisplay = 1280,
> + .vsync_start = 1280 + 10,
> + .vsync_end = 1280 + 10 + 10,
> + .vtotal = 1280 + 10 + 10 + 20,
> +};
Is that the default mode for this Ilitek device or just for the
BananaPi? If it is the latter it should be named
bananapi_default_mode or something so as not to confuse
the next user of this driver.
> + ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
> + if (IS_ERR(ctx->power)) {
> + dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
> + return PTR_ERR(ctx->power);
> + }
So I'm a bit sceptical about this one.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
@ 2018-05-11 15:54 ` Linus Walleij
0 siblings, 0 replies; 20+ messages in thread
From: Linus Walleij @ 2018-05-11 15:54 UTC (permalink / raw)
To: Maxime Ripard
Cc: linux-kernel, open list:DRM PANEL DRIVERS, Chen-Yu Tsai,
Thierry Reding, Daniel Vetter
Hi Maxime,
sorry that noone had much time to look at the driver.
But I can help out, hopefully.
On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
> based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
> after the other Ilitek controller drivers.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Nice, I have some experience with those.
> +config DRM_PANEL_ILITEK_ILI9881C
> + tristate "Ilitek ILI9881C-based panels"
> + depends on OF
> + depends on DRM_MIPI_DSI
> + depends on BACKLIGHT_CLASS_DEVICE
If it absolutely needs DRM_MIPI_DSI and
BACKLIGHT_CLASS_DEVICE it maybe you should
be more helpful to the user to just select it?
Depending on OF is fine, that is more of a platform
property.
> +struct ili9881c {
> + struct drm_panel panel;
> + struct mipi_dsi_device *dsi;
> +
> + struct backlight_device *backlight;
> + struct gpio_desc *power;
Should this not be modeled using a fixed regulator instead?
> + struct gpio_desc *reset;
> +};
> +enum ili9881c_op {
> + ILI9881C_SWITCH_PAGE,
> + ILI9881C_COMMAND,
> +};
> +
> +struct ili9881c_instr {
> + enum ili9881c_op op;
> +
> + union arg {
> + struct cmd {
> + u8 cmd;
> + u8 data;
> + } cmd;
> + u8 page;
> + } arg;
> +};
> +
> +#define ILI9881C_SWITCH_PAGE_INSTR(_page) \
> + { \
> + .op = ILI9881C_SWITCH_PAGE, \
> + .arg = { \
> + .page = (_page), \
> + }, \
> + }
> +
> +#define ILI9881C_COMMAND_INSTR(_cmd, _data) \
> + { \
> + .op = ILI9881C_COMMAND, \
> + .arg = { \
> + .cmd = { \
> + .cmd = (_cmd), \
> + .data = (_data), \
> + }, \
> + }, \
> + }
That looks clever.
> +static const struct ili9881c_instr ili9881c_init[] = {
> + ILI9881C_SWITCH_PAGE_INSTR(3),
> + ILI9881C_COMMAND_INSTR(0x01, 0x00),
> + ILI9881C_COMMAND_INSTR(0x02, 0x00),
> + ILI9881C_COMMAND_INSTR(0x03, 0x73),
> + ILI9881C_COMMAND_INSTR(0x04, 0x03),
> + ILI9881C_COMMAND_INSTR(0x05, 0x00),
> + ILI9881C_COMMAND_INSTR(0x06, 0x06),
> + ILI9881C_COMMAND_INSTR(0x07, 0x06),
(...)
This is a bit hard to understand to say the least. If this comes from
a datasheet some more elaborate construction of the commands
would be nice, maybe using some #defines?
If this just comes from some code drop or reverse engineering,
OK bad luck, I can live with it :)
It looks a bit like you're uploading a small firmware.
> +static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
> +{
> + u8 buf[4] = { 0xff, 0x98, 0x81, page };
That is also a bit unclear wrt what is going on.
> +static int ili9881c_prepare(struct drm_panel *panel)
> +{
> + struct ili9881c *ctx = panel_to_ili9881c(panel);
> + unsigned int i;
> + int ret;
> +
> + /* Power the panel */
> + gpiod_set_value(ctx->power, 1);
> + msleep(5);
So isn't this a fixed regulator using a GPIO?
> +static const struct drm_display_mode default_mode = {
> + .clock = 62000,
> + .vrefresh = 60,
> +
> + .hdisplay = 720,
> + .hsync_start = 720 + 10,
> + .hsync_end = 720 + 10 + 20,
> + .htotal = 720 + 10 + 20 + 30,
> +
> + .vdisplay = 1280,
> + .vsync_start = 1280 + 10,
> + .vsync_end = 1280 + 10 + 10,
> + .vtotal = 1280 + 10 + 10 + 20,
> +};
Is that the default mode for this Ilitek device or just for the
BananaPi? If it is the latter it should be named
bananapi_default_mode or something so as not to confuse
the next user of this driver.
> + ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
> + if (IS_ERR(ctx->power)) {
> + dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
> + return PTR_ERR(ctx->power);
> + }
So I'm a bit sceptical about this one.
Yours,
Linus Walleij
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation
2018-05-04 15:23 ` Maxime Ripard
(?)
(?)
@ 2018-05-11 15:55 ` Linus Walleij
-1 siblings, 0 replies; 20+ messages in thread
From: Linus Walleij @ 2018-05-11 15:55 UTC (permalink / raw)
To: Maxime Ripard
Cc: Thierry Reding, Chen-Yu Tsai, linux-kernel,
open list:DRM PANEL DRIVERS, Daniel Vetter
On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> The LHR050H41 from BananaPi is a 1280x700 4-lanes DSI panel based on the
> ILI9881c from Ilitek.
>
> Acked-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
(...)
Bah, now I see this:
> + - power-gpios: a GPIO phandle for the power pin
That should probably be a fixed regulator backed by a GPIO
instead. Especially if you know which voltage it has. So
one more layer of abstraction, sorry.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
2018-05-11 15:54 ` Linus Walleij
@ 2018-05-29 9:23 ` Maxime Ripard
-1 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-29 9:23 UTC (permalink / raw)
To: Linus Walleij
Cc: Thierry Reding, Chen-Yu Tsai, open list:DRM PANEL DRIVERS,
Gustavo Padovan, Daniel Vetter, Maarten Lankhorst, Sean Paul,
linux-kernel
Hi Linus,
On Fri, May 11, 2018 at 05:54:27PM +0200, Linus Walleij wrote:
> Hi Maxime,
>
> sorry that noone had much time to look at the driver.
> But I can help out, hopefully.
Thanks for your feedback :)
> On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> > The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
> > based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
> > after the other Ilitek controller drivers.
> >
> > Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
>
> Nice, I have some experience with those.
>
> > +config DRM_PANEL_ILITEK_ILI9881C
> > + tristate "Ilitek ILI9881C-based panels"
> > + depends on OF
> > + depends on DRM_MIPI_DSI
> > + depends on BACKLIGHT_CLASS_DEVICE
>
> If it absolutely needs DRM_MIPI_DSI and
> BACKLIGHT_CLASS_DEVICE it maybe you should
> be more helpful to the user to just select it?
>
> Depending on OF is fine, that is more of a platform
> property.
All the other panels in this file seems to be using a depends on for
these two, so I'd rather remain consistent on this.
> > +struct ili9881c {
> > + struct drm_panel panel;
> > + struct mipi_dsi_device *dsi;
> > +
> > + struct backlight_device *backlight;
> > + struct gpio_desc *power;
>
> Should this not be modeled using a fixed regulator instead?
Probably, yes. On my board it's a GPIO that goes through the
connector, but it seems like the controller itself takes a regulator,
so there's probably a GPIO-controlled regulator on the display PCB
somewhere. I'll change it.
> > +static const struct ili9881c_instr ili9881c_init[] = {
> > + ILI9881C_SWITCH_PAGE_INSTR(3),
> > + ILI9881C_COMMAND_INSTR(0x01, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x02, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x03, 0x73),
> > + ILI9881C_COMMAND_INSTR(0x04, 0x03),
> > + ILI9881C_COMMAND_INSTR(0x05, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x06, 0x06),
> > + ILI9881C_COMMAND_INSTR(0x07, 0x06),
> (...)
>
> This is a bit hard to understand to say the least.
I know :/
> If this comes from a datasheet some more elaborate construction of
> the commands would be nice, maybe using some #defines?
>
> If this just comes from some code drop or reverse engineering,
> OK bad luck, I can live with it :)
This comes from a code drop (or rather, an obscure initialisation
sequence coming straight from the vendor without any documentation or
comment associated to it).
> It looks a bit like you're uploading a small firmware.
>
> > +static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
> > +{
> > + u8 buf[4] = { 0xff, 0x98, 0x81, page };
>
> That is also a bit unclear wrt what is going on.
My understanding is that the controller maps some registers (that
might be accessible through other buses if the controller is setup to
use something other than DCS) to DCS commands. Since there's more
commands than DCS would allow, it's setup in several pages, with each
pages having its own set of commands, and the page 0 accepting the
usual standard DCS commands.
It really doesn't look to me like a firmware, but just a poorly
documented initialisation sequence.. I'll add a comment
> > +static const struct drm_display_mode default_mode = {
> > + .clock = 62000,
> > + .vrefresh = 60,
> > +
> > + .hdisplay = 720,
> > + .hsync_start = 720 + 10,
> > + .hsync_end = 720 + 10 + 20,
> > + .htotal = 720 + 10 + 20 + 30,
> > +
> > + .vdisplay = 1280,
> > + .vsync_start = 1280 + 10,
> > + .vsync_end = 1280 + 10 + 10,
> > + .vtotal = 1280 + 10 + 10 + 20,
> > +};
>
> Is that the default mode for this Ilitek device or just for the
> BananaPi? If it is the latter it should be named
> bananapi_default_mode or something so as not to confuse
> the next user of this driver.
I'll do it, thanks!
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver
@ 2018-05-29 9:23 ` Maxime Ripard
0 siblings, 0 replies; 20+ messages in thread
From: Maxime Ripard @ 2018-05-29 9:23 UTC (permalink / raw)
To: Linus Walleij
Cc: linux-kernel, open list:DRM PANEL DRIVERS, Chen-Yu Tsai,
Thierry Reding, Daniel Vetter
Hi Linus,
On Fri, May 11, 2018 at 05:54:27PM +0200, Linus Walleij wrote:
> Hi Maxime,
>
> sorry that noone had much time to look at the driver.
> But I can help out, hopefully.
Thanks for your feedback :)
> On Fri, May 4, 2018 at 5:23 PM, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> > The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic, and is
> > based on the Ilitek ILI9881c Controller. Add a driver for it, modelled
> > after the other Ilitek controller drivers.
> >
> > Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
>
> Nice, I have some experience with those.
>
> > +config DRM_PANEL_ILITEK_ILI9881C
> > + tristate "Ilitek ILI9881C-based panels"
> > + depends on OF
> > + depends on DRM_MIPI_DSI
> > + depends on BACKLIGHT_CLASS_DEVICE
>
> If it absolutely needs DRM_MIPI_DSI and
> BACKLIGHT_CLASS_DEVICE it maybe you should
> be more helpful to the user to just select it?
>
> Depending on OF is fine, that is more of a platform
> property.
All the other panels in this file seems to be using a depends on for
these two, so I'd rather remain consistent on this.
> > +struct ili9881c {
> > + struct drm_panel panel;
> > + struct mipi_dsi_device *dsi;
> > +
> > + struct backlight_device *backlight;
> > + struct gpio_desc *power;
>
> Should this not be modeled using a fixed regulator instead?
Probably, yes. On my board it's a GPIO that goes through the
connector, but it seems like the controller itself takes a regulator,
so there's probably a GPIO-controlled regulator on the display PCB
somewhere. I'll change it.
> > +static const struct ili9881c_instr ili9881c_init[] = {
> > + ILI9881C_SWITCH_PAGE_INSTR(3),
> > + ILI9881C_COMMAND_INSTR(0x01, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x02, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x03, 0x73),
> > + ILI9881C_COMMAND_INSTR(0x04, 0x03),
> > + ILI9881C_COMMAND_INSTR(0x05, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x06, 0x06),
> > + ILI9881C_COMMAND_INSTR(0x07, 0x06),
> (...)
>
> This is a bit hard to understand to say the least.
I know :/
> If this comes from a datasheet some more elaborate construction of
> the commands would be nice, maybe using some #defines?
>
> If this just comes from some code drop or reverse engineering,
> OK bad luck, I can live with it :)
This comes from a code drop (or rather, an obscure initialisation
sequence coming straight from the vendor without any documentation or
comment associated to it).
> It looks a bit like you're uploading a small firmware.
>
> > +static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
> > +{
> > + u8 buf[4] = { 0xff, 0x98, 0x81, page };
>
> That is also a bit unclear wrt what is going on.
My understanding is that the controller maps some registers (that
might be accessible through other buses if the controller is setup to
use something other than DCS) to DCS commands. Since there's more
commands than DCS would allow, it's setup in several pages, with each
pages having its own set of commands, and the page 0 accepting the
usual standard DCS commands.
It really doesn't look to me like a firmware, but just a poorly
documented initialisation sequence.. I'll add a comment
> > +static const struct drm_display_mode default_mode = {
> > + .clock = 62000,
> > + .vrefresh = 60,
> > +
> > + .hdisplay = 720,
> > + .hsync_start = 720 + 10,
> > + .hsync_end = 720 + 10 + 20,
> > + .htotal = 720 + 10 + 20 + 30,
> > +
> > + .vdisplay = 1280,
> > + .vsync_start = 1280 + 10,
> > + .vsync_end = 1280 + 10 + 10,
> > + .vtotal = 1280 + 10 + 10 + 20,
> > +};
>
> Is that the default mode for this Ilitek device or just for the
> BananaPi? If it is the latter it should be named
> bananapi_default_mode or something so as not to confuse
> the next user of this driver.
I'll do it, thanks!
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 20+ messages in thread
end of thread, other threads:[~2018-05-29 9:23 UTC | newest]
Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-04 15:23 [PATCH v4 0/3] drm/panel: Add Ilitek ILI9881c controller driver Maxime Ripard
2018-05-04 15:23 ` [PATCH v4 1/3] dt-bindings: panel: Add the Ilitek ILI9881c panel documentation Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-11 15:40 ` Linus Walleij
2018-05-11 15:40 ` Linus Walleij
2018-05-11 15:55 ` Linus Walleij
2018-05-04 15:23 ` [PATCH v4 2/3] drm/panel: Add Ilitek ILI9881c panel driver Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-05 3:48 ` kbuild test robot
2018-05-05 3:48 ` kbuild test robot
2018-05-05 7:15 ` kbuild test robot
2018-05-05 7:15 ` kbuild test robot
2018-05-11 15:54 ` Linus Walleij
2018-05-11 15:54 ` Linus Walleij
2018-05-29 9:23 ` Maxime Ripard
2018-05-29 9:23 ` Maxime Ripard
2018-05-04 15:23 ` [PATCH v4 3/3] [DO NOT MERGE] arm: dts: sun8i: bpi-m2m: Add DSI display Maxime Ripard
2018-05-04 15:23 ` Maxime Ripard
2018-05-05 7:15 ` kbuild test robot
2018-05-05 7:15 ` kbuild test robot
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.