Hi Hoegeun Kwon,
Thanks for the patch.
On 27.12.2016 10:05, Hoegeun Kwon wrote:
> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
> driver. This panel has 1440x2560 resolution in 5.7-inch physical
> panel in the TM2 device.
>
> Signed-off-by: Donghwa Lee <dh09.lee@xxxxxxxxxxx>
> Signed-off-by: Hyungwon Hwang <human.hwang@xxxxxxxxxxx>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@xxxxxxxxxxx>
> ---
> Changes for V2:
>
> - Fixed the samsung,s6e3ha2.txt DT document.
> - Added active high or low after the description of the GPIOs.
> - Removed the reg and added a description of the virtual
> channel number of a DSI peripheral.
I do not understand this change, according to Rob's comment for previous
patch:
> reg doesn't really work here unless this node is a child of the DSI
> controller node. But if it is a child node, then you don't need the OF
> graph.
As the panel is controlled via DSI bus the node should be a child of DSI
controller, and therefore 'reg' property is required. Nice novum for me
is that OF graph is not required in that case.
>
> .../bindings/display/panel/samsung,s6e3ha2.txt | 62 ++
> drivers/gpu/drm/panel/Kconfig | 6 +
> drivers/gpu/drm/panel/Makefile | 1 +
> drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c | 756 +++++++++++++++++++++
> 4 files changed, 825 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
>
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> new file mode 100644
> index 0000000..6e989ee
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> @@ -0,0 +1,62 @@
> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
> +
> +Required properties:
> + - compatible: "samsung,s6e3ha2"
> + - vdd3-supply: core voltage supply
Shouldn't be 'I/O voltage supply' ?
> + - vci-supply: voltage supply for analog circuits
> + - reset-gpios: a GPIO spec for the reset pin (active high)
According to specs it is active low, logic in the driver should be also
adjusted.
> + - enable-gpios: a GPIO spec for the panel enable pin (active high)
> + - te-gpios: a GPIO spec for the tearing effect synchronization signal
> + gpio pin (active high)
> +
> +Optional properties:
> + - display-timings: timings for the connected panel as described by [1]
In case of panels timings should be provided by device driver, not by dts.
> +
> +The device node can contain one 'port' child node with one child
> +'endpoint' node, according to the bindings defined in [2]. This
> +node should describe panel's video bus.
This could be dropped according to Rob's advice.
> +
> +The virtual channel number of a DSI peripheral as described by [3].
> +Must be in the range from 0 to 3.
> +/* peripheral responds to virtual channel 0 */
> +peripheral@0 {
> + compatible = "...";
> + reg = <0>;
> +};
> +
> +[1]: Documentation/devicetree/bindings/display/panel/display-timing.txt
> +[2]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +[3]: Documentation/devicetree/bindings/display/mipi-dsi-bus.txt
> +
> +Example:
> +
> + panel@0 {
> + ...
> +
> + compatible = "samsung,s6e3ha2";
> + vdd3-supply = <&ldo27_reg>;
> + vci-supply = <&ldo28_reg>;
> + reset-gpios = <&gpg0 0 GPIO_ACTIVE_HIGH>;
> + enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> + te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> + display-timings {
> + timing-0 {
> + clock-frequency = <0>;
> + hactive = <1440>;
> + vactive = <2560>;
> + hfront-porch = <1>;
> + hback-porch = <1>;
> + hsync-len = <1>;
> + vfront-porch = <1>;
> + vback-porch = <15>;
> + vsync-len = <1>;
> + };
> + };
> +
> + port {
> + dsi_in: endpoint {
> + remote-endpoint = <&dsi_out>;
> + };
> + };
> + };
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 62aba97..e1a2fcd 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -58,6 +58,12 @@ config DRM_PANEL_SAMSUNG_S6E8AA0
> select DRM_MIPI_DSI
> select VIDEOMODE_HELPERS
>
> +config DRM_PANEL_SAMSUNG_S6E3HA2
> + tristate "Samsung S6E3HA2 DSI video mode panel"
> + depends on OF
> + select DRM_MIPI_DSI
It should be "depends on" in case of panels.
> + select VIDEOMODE_HELPERS
> +
> config DRM_PANEL_SHARP_LQ101R1SX01
> tristate "Sharp LQ101R1SX01 panel"
> depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index a5c7ec0..993699b 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -4,5 +4,6 @@ obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
> obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
> obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
> obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
> +obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
Shoudn't it be sorted?
> obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
> obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
> diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> new file mode 100644
> index 0000000..a6ad63b
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> @@ -0,0 +1,756 @@
> +/*
> + * MIPI-DSI based s6e3ha2 AMOLED 5.7 inch panel driver.
> + *
> + * Copyright (c) 2016 Samsung Electronics Co., Ltd.
> + * Donghwa Lee <dh09.lee@xxxxxxxxxxx>
> + * Hyungwon Hwang <human.hwang@xxxxxxxxxxx>
> + * Hoegeun Kwon <hoegeun.kwon@xxxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> +*/
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/regulator/consumer.h>
> +#include <video/mipi_display.h>
> +#include <video/of_videomode.h>
> +#include <video/videomode.h>
> +#include <linux/backlight.h>
> +
> +#define S6E3HA2_MIN_BRIGHTNESS 0
> +#define S6E3HA2_MAX_BRIGHTNESS 100
> +#define S6E3HA2_DEFAULT_BRIGHTNESS 80
> +
> +#define S6E3HA2_NUM_GAMMA_STEPS 46
> +#define S6E3HA2_GAMMA_CMD_CNT 35
> +#define S6E3HA2_VINT_STATUS_MAX 10
> +
> +static const u8 gamma_tbl[S6E3HA2_NUM_GAMMA_STEPS][S6E3HA2_GAMMA_CMD_CNT] = {
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x82, 0x83,
> + 0x85, 0x88, 0x8b, 0x8b, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8c,
> + 0x94, 0x84, 0xb1, 0xaf, 0x8e, 0xcf, 0xad, 0xc9, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x84, 0x84,
> + 0x85, 0x87, 0x8b, 0x8a, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8a,
> + 0x93, 0x84, 0xb0, 0xae, 0x8e, 0xc9, 0xa8, 0xc5, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x8a, 0x8a, 0x84, 0x88, 0x81, 0x84, 0x8a, 0x88, 0x8a,
> + 0x91, 0x84, 0xb1, 0xae, 0x8b, 0xd5, 0xb2, 0xcc, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x8a, 0x8a, 0x84, 0x87, 0x81, 0x84, 0x8a, 0x87, 0x8a,
> + 0x91, 0x85, 0xae, 0xac, 0x8a, 0xc3, 0xa3, 0xc0, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x85, 0x85,
> + 0x86, 0x85, 0x88, 0x89, 0x84, 0x89, 0x82, 0x84, 0x87, 0x85, 0x8b,
> + 0x91, 0x88, 0xad, 0xab, 0x8a, 0xb7, 0x9b, 0xb6, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x89, 0x8a, 0x84, 0x89, 0x83, 0x83, 0x86, 0x84, 0x8b,
> + 0x90, 0x84, 0xb0, 0xae, 0x8b, 0xce, 0xad, 0xc8, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x89,
> + 0x8f, 0x84, 0xac, 0xaa, 0x89, 0xb1, 0x98, 0xaf, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x88, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8c,
> + 0x91, 0x86, 0xac, 0xaa, 0x89, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x88,
> + 0x8b, 0x82, 0xad, 0xaa, 0x8a, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8a,
> + 0x8e, 0x84, 0xae, 0xac, 0x89, 0xda, 0xb7, 0xd0, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x80, 0x83, 0x82, 0x8b,
> + 0x8e, 0x85, 0xac, 0xaa, 0x89, 0xc8, 0xaa, 0xc1, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x85, 0x86, 0x87, 0x89, 0x81, 0x85, 0x81, 0x84, 0x86, 0x84, 0x8c,
> + 0x8c, 0x84, 0xa9, 0xa8, 0x87, 0xa3, 0x92, 0xa1, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x85, 0x86, 0x87, 0x89, 0x84, 0x86, 0x83, 0x80, 0x83, 0x81, 0x8c,
> + 0x8d, 0x84, 0xaa, 0xaa, 0x89, 0xce, 0xaf, 0xc5, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x85, 0x86, 0x87, 0x89, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> + 0x8c, 0x84, 0xa8, 0xa8, 0x88, 0xb5, 0x9f, 0xb0, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> + 0x8b, 0x84, 0xab, 0xa8, 0x86, 0xd4, 0xb4, 0xc9, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x84, 0x84, 0x85, 0x8b,
> + 0x8a, 0x83, 0xa6, 0xa5, 0x84, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> + 0x86, 0x85, 0x86, 0x86, 0x82, 0x85, 0x81, 0x82, 0x83, 0x84, 0x8e,
> + 0x8b, 0x83, 0xa4, 0xa3, 0x8a, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8e,
> + 0x8b, 0x83, 0xa4, 0xa2, 0x86, 0xc1, 0xa9, 0xb7, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8d,
> + 0x89, 0x82, 0xa2, 0xa1, 0x84, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> + 0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x83, 0x83, 0x85, 0x8c,
> + 0x87, 0x7f, 0xa2, 0x9d, 0x88, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xbb, 0x00, 0xc5, 0x00, 0xb4, 0x87, 0x86, 0x86, 0x84, 0x83,
> + 0x86, 0x87, 0x87, 0x87, 0x80, 0x82, 0x7f, 0x86, 0x86, 0x88, 0x8a,
> + 0x84, 0x7e, 0x9d, 0x9c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xbd, 0x00, 0xc7, 0x00, 0xb7, 0x87, 0x85, 0x85, 0x84, 0x83,
> + 0x86, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x83, 0x84, 0x85, 0x8a,
> + 0x85, 0x7e, 0x9c, 0x9b, 0x85, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xc0, 0x00, 0xca, 0x00, 0xbb, 0x87, 0x86, 0x85, 0x83, 0x83,
> + 0x85, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x84, 0x85, 0x86, 0x89,
> + 0x83, 0x7d, 0x9c, 0x99, 0x87, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xc4, 0x00, 0xcd, 0x00, 0xbe, 0x87, 0x86, 0x85, 0x83, 0x83,
> + 0x86, 0x85, 0x85, 0x87, 0x81, 0x82, 0x80, 0x82, 0x82, 0x83, 0x8a,
> + 0x85, 0x7f, 0x9f, 0x9b, 0x86, 0xb4, 0xa1, 0xac, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xc7, 0x00, 0xd0, 0x00, 0xc2, 0x87, 0x85, 0x85, 0x83, 0x82,
> + 0x85, 0x85, 0x85, 0x86, 0x82, 0x83, 0x80, 0x82, 0x82, 0x84, 0x87,
> + 0x86, 0x80, 0x9e, 0x9a, 0x87, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xca, 0x00, 0xd2, 0x00, 0xc5, 0x87, 0x85, 0x84, 0x82, 0x82,
> + 0x84, 0x85, 0x85, 0x86, 0x81, 0x82, 0x7f, 0x82, 0x82, 0x84, 0x88,
> + 0x86, 0x81, 0x9d, 0x98, 0x86, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xce, 0x00, 0xd6, 0x00, 0xca, 0x86, 0x85, 0x84, 0x83, 0x83,
> + 0x85, 0x84, 0x84, 0x85, 0x81, 0x82, 0x80, 0x81, 0x81, 0x82, 0x89,
> + 0x86, 0x81, 0x9c, 0x97, 0x86, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xd1, 0x00, 0xd9, 0x00, 0xce, 0x86, 0x84, 0x83, 0x83, 0x82,
> + 0x85, 0x85, 0x85, 0x86, 0x81, 0x83, 0x81, 0x82, 0x82, 0x83, 0x86,
> + 0x83, 0x7f, 0x99, 0x95, 0x86, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xd4, 0x00, 0xdb, 0x00, 0xd1, 0x86, 0x85, 0x83, 0x83, 0x82,
> + 0x85, 0x84, 0x84, 0x85, 0x80, 0x83, 0x82, 0x80, 0x80, 0x81, 0x87,
> + 0x84, 0x81, 0x98, 0x93, 0x85, 0xae, 0x9c, 0xa8, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xd8, 0x00, 0xde, 0x00, 0xd6, 0x86, 0x84, 0x83, 0x81, 0x81,
> + 0x83, 0x85, 0x85, 0x85, 0x82, 0x83, 0x81, 0x81, 0x81, 0x83, 0x86,
> + 0x84, 0x80, 0x98, 0x91, 0x85, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xdc, 0x00, 0xe2, 0x00, 0xda, 0x85, 0x84, 0x83, 0x82, 0x82,
> + 0x84, 0x84, 0x84, 0x85, 0x81, 0x82, 0x82, 0x80, 0x80, 0x81, 0x83,
> + 0x82, 0x7f, 0x99, 0x93, 0x86, 0x94, 0x8b, 0x92, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xdf, 0x00, 0xe5, 0x00, 0xde, 0x85, 0x84, 0x82, 0x82, 0x82,
> + 0x84, 0x83, 0x83, 0x84, 0x81, 0x81, 0x80, 0x83, 0x82, 0x84, 0x82,
> + 0x81, 0x7f, 0x99, 0x92, 0x86, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x83, 0x83, 0x84, 0x80,
> + 0x81, 0x7c, 0x99, 0x92, 0x87, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x85, 0x84, 0x83, 0x81, 0x81,
> + 0x82, 0x82, 0x82, 0x83, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> + 0x82, 0x80, 0x91, 0x8d, 0x83, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> + 0x81, 0x7f, 0x91, 0x8c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x82,
> + 0x82, 0x7f, 0x94, 0x89, 0x84, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x83,
> + 0x82, 0x7f, 0x91, 0x85, 0x81, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x83, 0x82, 0x84, 0x83,
> + 0x82, 0x7f, 0x90, 0x84, 0x81, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x80, 0x80,
> + 0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x80, 0x80, 0x81, 0x81,
> + 0x82, 0x83, 0x7e, 0x80, 0x7c, 0xa4, 0x97, 0x9f, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xe9, 0x00, 0xec, 0x00, 0xe8, 0x84, 0x83, 0x82, 0x81, 0x81,
> + 0x82, 0x82, 0x82, 0x83, 0x7f, 0x7f, 0x7f, 0x81, 0x80, 0x82, 0x83,
> + 0x83, 0x84, 0x79, 0x7c, 0x79, 0xb1, 0xa0, 0xaa, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xed, 0x00, 0xf0, 0x00, 0xec, 0x83, 0x83, 0x82, 0x80, 0x80,
> + 0x81, 0x82, 0x82, 0x82, 0x7f, 0x7f, 0x7e, 0x81, 0x81, 0x82, 0x80,
> + 0x81, 0x81, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xf1, 0x00, 0xf4, 0x00, 0xf1, 0x83, 0x82, 0x82, 0x80, 0x80,
> + 0x81, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x7d,
> + 0x7e, 0x7f, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xf6, 0x00, 0xf7, 0x00, 0xf5, 0x82, 0x82, 0x81, 0x80, 0x80,
> + 0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x82,
> + 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x00, 0xfa, 0x00, 0xfb, 0x00, 0xfa, 0x81, 0x81, 0x81, 0x80, 0x80,
> + 0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 },
> + { 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> + 0x00, 0x00 }
> +};
> +
> +unsigned char VINT_TABLE[S6E3HA2_VINT_STATUS_MAX] = {
Lower case names.
> + 0x18, 0x19, 0x1a, 0x1b, 0x1c,
> + 0x1d, 0x1e, 0x1f, 0x20, 0x21
> +};
> +
> +struct s6e3ha2 {
> + struct device *dev;
> + struct drm_panel panel;
> + struct backlight_device *bl_dev;
> +
> + struct regulator_bulk_data supplies[2];
> + struct gpio_desc *reset_gpio;
> + struct gpio_desc *enable_gpio;
> + u32 power_on_delay;
> + u32 reset_delay;
> + struct videomode vm;
> +
> + /* This field is tested by functions directly accessing DSI bus before
> + * transfer, transfer is skipped if it is set. In case of transfer
> + * failure or unexpected response the field is set to error value.
> + * Such construct allows to eliminate many checks in higher level
> + * functions.
> + */
> + int error;
> +};
> +
> +static int s6e3ha2_clear_error(struct s6e3ha2 *ctx)
> +{
> + int ret = ctx->error;
> +
> + ctx->error = 0;
> + return ret;
> +}
> +
> +static void s6e3ha2_dcs_write(struct s6e3ha2 *ctx, const void *data, size_t len)
> +{
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> + ssize_t ret;
> +
> + if (ctx->error < 0)
> + return;
> +
> + ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
> + if (ret < 0) {
> + dev_err(ctx->dev, "error %zd writing dcs seq: %*ph\n",
> + ret, (int)len, data);
> + ctx->error = ret;
> + }
> +}
> +
> +#define s6e3ha2_dcs_write_seq_static(ctx, seq...) do { \
> + static const u8 d[] = { seq }; \
> + s6e3ha2_dcs_write(ctx, d, ARRAY_SIZE(d)); \
> +} while (0)
> +
> +static void s6e3ha2_test_key_on_f0(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_f0(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_test_key_on_fc(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_fc(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_single_dsi_set(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf2, 0x67);
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf9, 0x09);
> +}
> +
> +static void s6e3ha2_freq_calibration(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfd, 0x1c);
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20, 0x39);
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0xa0);
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20);
> + s6e3ha2_dcs_write_seq_static(ctx, 0xce, 0x03, 0x3b, 0x12, 0x62,
> + 0x40, 0x80, 0xc0, 0x28, 0x28, 0x28, 0x28, 0x39, 0xc5);
> +}
> +
> +static void s6e3ha2_aor_control(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb2, 0x03, 0x10);
> +}
> +
> +static void s6e3ha2_caps_elvss_set(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb6, 0x9c, 0x0a);
> +}
> +
> +static void s6e3ha2_acl_off(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0x55, 0x00);
> +}
> +
> +static void s6e3ha2_acl_off_opr(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb5, 0x40);
> +}
> +
> +static void s6e3ha2_test_global(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x07);
> +}
> +
> +static void s6e3ha2_test(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb8, 0x19);
> +}
> +
> +static void s6e3ha2_touch_hsync_on1(struct s6e3ha2 *ctx) {
> + s6e3ha2_dcs_write_seq_static(ctx,
> + 0xbd, 0x33, 0x11, 0x02, 0x16, 0x02, 0x16);
> +}
> +
> +static void s6e3ha2_pentile_control(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xc0, 0x00, 0x00, 0xd8, 0xd8);
> +}
> +
> +static void s6e3ha2_poc_global(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x20);
> +}
> +
> +static void s6e3ha2_poc_setting(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x08);
> +}
> +
> +static void s6e3ha2_pcd_set_off(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xcc, 0x40, 0x51);
> +}
> +
> +static void s6e3ha2_err_fg_set(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xed, 0x44);
> +}
> +
> +static void s6e3ha2_hbm_off(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0x53, 0x00);
> +}
> +
> +static void s6e3ha2_te_start_setting(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xb9, 0x10, 0x09, 0xff, 0x00, 0x09);
> +}
> +
> +static void s6e3ha2_gamma_update(struct s6e3ha2 *ctx)
> +{
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x03);
> + ndelay(100); /* need for 100ns delay */
> + s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x00);
> +}
> +
> +static int s6e3ha2_get_brightness(struct backlight_device *bl_dev)
> +{
> + return bl_dev->props.brightness;
> +}
> +
> +static void s6e3ha2_set_vint(struct s6e3ha2 *ctx) {
Curly bracket should be on new line.
> + struct backlight_device *bl_dev = ctx->bl_dev;
> + unsigned int brightness = bl_dev->props.brightness;
> + unsigned char data[] = { 0xf4, 0x8b,
> + VINT_TABLE[brightness * (S6E3HA2_VINT_STATUS_MAX - 1) /
> + S6E3HA2_MAX_BRIGHTNESS] };
> +
> + s6e3ha2_dcs_write(ctx, data, 3);
> +}
> +
> +static unsigned int s6e3ha2_get_brightness_index(unsigned int brightness)
> +{
> + return (brightness * (S6E3HA2_NUM_GAMMA_STEPS - 1)) /
> + S6E3HA2_MAX_BRIGHTNESS;
> +}
> +
> +static int s6e3ha2_update_gamma(struct s6e3ha2 *ctx, unsigned int brightness)
> +{
> + struct backlight_device *bl_dev = ctx->bl_dev;
> + unsigned int index = s6e3ha2_get_brightness_index(brightness);
> + u8 data[S6E3HA2_GAMMA_CMD_CNT + 1] = { 0xca, };
> +
> + memcpy(data + 1, gamma_tbl + index, S6E3HA2_GAMMA_CMD_CNT);
> + s6e3ha2_dcs_write(ctx, data, ARRAY_SIZE(data));
> +
> + s6e3ha2_gamma_update(ctx);
> + bl_dev->props.brightness = brightness;
> +
> + return 0;
> +}
> +
> +static int s6e3ha2_set_brightness(struct backlight_device *bl_dev)
> +{
> + struct s6e3ha2 *ctx = (struct s6e3ha2 *)bl_get_data(bl_dev);
> + unsigned int brightness = bl_dev->props.brightness;
> +
> + if (brightness < S6E3HA2_MIN_BRIGHTNESS ||
> + brightness > bl_dev->props.max_brightness) {
> + dev_err(ctx->dev, "Invalid brightness: %u\n", brightness);
> + return -EINVAL;
> + }
> +
> + if (bl_dev->props.power > FB_BLANK_NORMAL) {
> + dev_err(ctx->dev,
> + "panel must be at least in fb blank normal state\n");
This message adds unnecessary noise to the logs, it should be definitely
removed.
I do not know how this callback should react here, it would be good to
verify it in documentation of backlight interface, or other drivers.
> + return -EPERM;
> + }
> +
> + s6e3ha2_test_key_on_f0(ctx);
> + s6e3ha2_update_gamma(ctx, brightness);
> + s6e3ha2_aor_control(ctx);
> + s6e3ha2_set_vint(ctx);
> + s6e3ha2_test_key_off_f0(ctx);
> +
> + return ctx->error;
I think 'return s6e3ha2_clear_error(ctx);' would be better here, but
this is just my suggestion.
By the way, backlight framework is not synchronized with drm framework,
so there are possible races here.
> +}
> +
> +static const struct backlight_ops s6e3ha2_bl_ops = {
> + .get_brightness = s6e3ha2_get_brightness,
> + .update_status = s6e3ha2_set_brightness,
> +};
> +
> +static void s6e3ha2_panel_init(struct s6e3ha2 *ctx)
> +{
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> + u32 reset_delay = ctx->reset_delay * 1000;
> +
> + mipi_dsi_dcs_exit_sleep_mode(dsi);
> + usleep_range(reset_delay, reset_delay + 1000);
> +
> + s6e3ha2_test_key_on_f0(ctx);
> + s6e3ha2_single_dsi_set(ctx);
> + s6e3ha2_test_key_on_fc(ctx);
> + s6e3ha2_freq_calibration(ctx);
> + s6e3ha2_test_key_off_fc(ctx);
> + s6e3ha2_test_key_off_f0(ctx);
> +}
> +
> +static int s6e3ha2_power_off(struct s6e3ha2 *ctx)
> +{
> + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +}
> +
> +static int s6e3ha2_disable(struct drm_panel *panel)
> +{
> + struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> + mipi_dsi_dcs_enter_sleep_mode(dsi);
> + if (ctx->error != 0)
> + goto err;
> +
> + mipi_dsi_dcs_set_display_off(dsi);
> + if (ctx->error != 0)
> + goto err;
> +
> + msleep(40);
> + ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> + return 0;
> +err:
> + return ctx->error;
> +}
> +
> +static int s6e3ha2_unprepare(struct drm_panel *panel)
> +{
> + struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> + int ret;
> +
> + ret = s6e3ha2_clear_error(ctx);
> + if (!ret)
> + ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> + return s6e3ha2_power_off(ctx);
> +}
> +
> +static int s6e3ha2_power_on(struct s6e3ha2 *ctx)
> +{
> + u32 reset_delay = ctx->reset_delay * 1000;
> + int ret;
> +
> + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> + if (ret < 0)
> + return ret;
> +
> + msleep(ctx->power_on_delay);
> +
> + gpiod_set_value(ctx->enable_gpio, 0);
> + usleep_range(reset_delay, reset_delay + 1000);
> + gpiod_set_value(ctx->enable_gpio, 1);
> +
> + gpiod_set_value(ctx->reset_gpio, 0);
> + usleep_range(reset_delay, reset_delay + 1000);
> + gpiod_set_value(ctx->reset_gpio, 1);
> + usleep_range(reset_delay, reset_delay + 1000);
> +
> + return 0;
> +}
> +static int s6e3ha2_prepare(struct drm_panel *panel)
> +{
> + struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> + int ret;
> +
> + ret = s6e3ha2_power_on(ctx);
> + if (ret < 0)
> + return ret;
> +
> + s6e3ha2_panel_init(ctx);
> +
> + ret = s6e3ha2_clear_error(ctx);
> + if (ret < 0) {
> + s6e3ha2_power_off(ctx);
> + return ret;
> + }
> +
> + ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> + return 0;
> +}
> +
> +static int s6e3ha2_enable(struct drm_panel *panel)
> +{
> + struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> + /* common setting */
> + mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
> +
> + s6e3ha2_test_key_on_f0(ctx);
> + s6e3ha2_test_key_on_fc(ctx);
> + s6e3ha2_touch_hsync_on1(ctx);
> + s6e3ha2_pentile_control(ctx);
> + s6e3ha2_poc_global(ctx);
> + s6e3ha2_poc_setting(ctx);
> + s6e3ha2_test_key_off_fc(ctx);
> +
> + /* pcd setting off for TB */
> + s6e3ha2_pcd_set_off(ctx);
> + s6e3ha2_err_fg_set(ctx);
> + s6e3ha2_te_start_setting(ctx);
> +
> + /* brightness setting */
> + s6e3ha2_set_brightness(ctx->bl_dev);
> + s6e3ha2_aor_control(ctx);
> + s6e3ha2_caps_elvss_set(ctx);
> + s6e3ha2_gamma_update(ctx);
> + s6e3ha2_acl_off(ctx);
> + s6e3ha2_acl_off_opr(ctx);
> + s6e3ha2_hbm_off(ctx);
> +
> + /* elvss temp compensation */
> + s6e3ha2_test_global(ctx);
> + s6e3ha2_test(ctx);
> + s6e3ha2_test_key_off_f0(ctx);
> +
> + mipi_dsi_dcs_set_display_on(dsi);
> + if (ctx->error != 0)
> + return ctx->error;
> +
> + ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
> +
> + return 0;
> +}
> +
> +static int s6e3ha2_get_modes(struct drm_panel *panel)
> +{
> + struct drm_connector *connector = panel->connector;
> + struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> + struct drm_display_mode *mode;
> +
> + mode = drm_mode_create(connector->dev);
> + if (!mode) {
> + DRM_ERROR("failed to create a new display mode\n");
> + return 0;
> + }
> +
> + drm_display_mode_from_videomode(&ctx->vm, mode);
> + mode->vrefresh = 60;
> + mode->width_mm = 71;
> + mode->height_mm = 125;
> + connector->display_info.width_mm = mode->width_mm;
> + connector->display_info.height_mm = mode->height_mm;
> +
> + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> + drm_mode_probed_add(connector, mode);
> +
> + return 1;
> +}
> +
> +static const struct drm_panel_funcs s6e3ha2_drm_funcs = {
> + .disable = s6e3ha2_disable,
> + .unprepare = s6e3ha2_unprepare,
> + .prepare = s6e3ha2_prepare,
> + .enable = s6e3ha2_enable,
> + .get_modes = s6e3ha2_get_modes,
> +};
> +
> +static int s6e3ha2_parse_dt(struct s6e3ha2 *ctx)
> +{
> + struct device *dev = ctx->dev;
> + struct device_node *np = dev->of_node;
> + int ret;
> +
> + ret = of_get_videomode(dev->of_node, &ctx->vm, 0);
> + if (ret < 0)
> + return ret;
> +
> + of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay);
> + of_property_read_u32(np, "reset-delay", &ctx->reset_delay);
These props are not described in bindings, anyway I think these
properties similarly to display-timings are panel specific, so they
should be hardcoded into the driver.
> +
> + return 0;
> +}
> +
> +static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
> +{
> + struct device *dev = &dsi->dev;
> + struct s6e3ha2 *ctx;
> + int ret;
> +
> + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + mipi_dsi_set_drvdata(dsi, ctx);
> +
> + ctx->dev = dev;
> +
> + dsi->lanes = 4;
> + dsi->format = MIPI_DSI_FMT_RGB888;
> + dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
> +
> + ret = s6e3ha2_parse_dt(ctx);
> + if (ret < 0)
> + return ret;
> +
> + ctx->supplies[0].supply = "vdd3";
> + ctx->supplies[1].supply = "vci";
> +
> + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
> + ctx->supplies);
> + if (ret < 0) {
> + dev_err(dev, "failed to get regulators: %d\n", ret);
> + return ret;
> + }
> +
> + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> + if (IS_ERR(ctx->reset_gpio)) {
> + dev_err(dev, "cannot get reset-gpios %ld\n",
> + PTR_ERR(ctx->reset_gpio));
> + return PTR_ERR(ctx->reset_gpio);
> + }
> +
> + ctx->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
> + if (IS_ERR(ctx->enable_gpio)) {
> + dev_err(dev, "cannot get enable-gpios %ld\n",
> + PTR_ERR(ctx->enable_gpio));
> + return PTR_ERR(ctx->enable_gpio);
> + }
> +
> + ctx->bl_dev = backlight_device_register("s6e3ha2", dev, ctx,
> + &s6e3ha2_bl_ops, NULL);
> + if (IS_ERR(ctx->bl_dev)) {
> + dev_err(dev, "failed to register backlight device\n");
> + return PTR_ERR(ctx->bl_dev);
> + }
> +
> + ctx->bl_dev->props.max_brightness = S6E3HA2_MAX_BRIGHTNESS;
> + ctx->bl_dev->props.brightness = S6E3HA2_DEFAULT_BRIGHTNESS;
> + ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> + drm_panel_init(&ctx->panel);
> + ctx->panel.dev = dev;
> + ctx->panel.funcs = &s6e3ha2_drm_funcs;
> +
> + ret = drm_panel_add(&ctx->panel);
> + if (ret < 0)
> + goto unregister_backlight;
> +
> + ret = mipi_dsi_attach(dsi);
> + if (ret < 0)
> + goto remove_panel;
> +
> + return ret;
> +
> +remove_panel:
> + drm_panel_remove(&ctx->panel);
> +
> +unregister_backlight:
> + backlight_device_unregister(ctx->bl_dev);
> +
> + return ret;
> +}
> +
> +static int s6e3ha2_remove(struct mipi_dsi_device *dsi)
> +{
> + struct s6e3ha2 *ctx = mipi_dsi_get_drvdata(dsi);
> +
> + mipi_dsi_detach(dsi);
> + drm_panel_remove(&ctx->panel);
> + backlight_device_unregister(ctx->bl_dev);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id s6e3ha2_of_match[] = {
> + { .compatible = "samsung,s6e3ha2" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, s6e3ha2_of_match);
> +
> +static struct mipi_dsi_driver s6e3ha2_driver = {
> + .probe = s6e3ha2_probe,
> + .remove = s6e3ha2_remove,
> + .driver = {
> + .name = "panel-samsung-s6e3ha2",
> + .of_match_table = s6e3ha2_of_match,
> + },
> +};
> +module_mipi_dsi_driver(s6e3ha2_driver);
> +
> +MODULE_AUTHOR("Donghwa Lee <dh09.lee@xxxxxxxxxxx>");
> +MODULE_AUTHOR("Hyungwon Hwang <human.hwang@xxxxxxxxxxx>");
> +MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@xxxxxxxxxxx>");
> +MODULE_DESCRIPTION("MIPI-DSI based s6e3ha2 AMOLED Panel Driver");
> +MODULE_LICENSE("GPL v2");
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