* [PATCH V3 0/2] drm/panel: Add Samsung AMS495QA01 Panel @ 2022-09-26 16:43 ` Chris Morgan 0 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, robh+dt, daniel, airlied, sam, thierry.reding, Chris Morgan From: Chris Morgan <macromorgan@hotmail.com> Add the Samsung AMS495QA01 panel as found on the Anbernic RG503. This panel uses DSI to receive video signals, but 3-wire SPI to receive command signals. Changes since V2: - Added 50hz mode at request of userspace devs. - Renamed "dupa" to panel name. Good catch Maya. - Added Maya's Signed-off-by. - Removed check for max backlight, since it is already done by backlight_device_set_brightness. - Fixed minor formatting issues on devicetree binding documentation and added port to provided example. Changes since V1: - Removed errant reference to backlight in documentation. This is an OLED panel. - Made elvss regulator optional. In my case its hard wired and not controllable. - Added "prepared" enum to track panel status to prevent unbalanced regulator enable/disable. Chris Morgan (2): dt-bindings: display: panel: Add Samsung AMS495QA01 bindings drm/panel: Add Samsung AMS495QA01 MIPI-DSI LCD panel .../display/panel/samsung,ams495qa01.yaml | 56 ++ drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + .../gpu/drm/panel/panel-samsung-ams495qa01.c | 547 ++++++++++++++++++ 4 files changed, 614 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml create mode 100644 drivers/gpu/drm/panel/panel-samsung-ams495qa01.c -- 2.25.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH V3 0/2] drm/panel: Add Samsung AMS495QA01 Panel @ 2022-09-26 16:43 ` Chris Morgan 0 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, Chris Morgan, robh+dt, thierry.reding, sam From: Chris Morgan <macromorgan@hotmail.com> Add the Samsung AMS495QA01 panel as found on the Anbernic RG503. This panel uses DSI to receive video signals, but 3-wire SPI to receive command signals. Changes since V2: - Added 50hz mode at request of userspace devs. - Renamed "dupa" to panel name. Good catch Maya. - Added Maya's Signed-off-by. - Removed check for max backlight, since it is already done by backlight_device_set_brightness. - Fixed minor formatting issues on devicetree binding documentation and added port to provided example. Changes since V1: - Removed errant reference to backlight in documentation. This is an OLED panel. - Made elvss regulator optional. In my case its hard wired and not controllable. - Added "prepared" enum to track panel status to prevent unbalanced regulator enable/disable. Chris Morgan (2): dt-bindings: display: panel: Add Samsung AMS495QA01 bindings drm/panel: Add Samsung AMS495QA01 MIPI-DSI LCD panel .../display/panel/samsung,ams495qa01.yaml | 56 ++ drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + .../gpu/drm/panel/panel-samsung-ams495qa01.c | 547 ++++++++++++++++++ 4 files changed, 614 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml create mode 100644 drivers/gpu/drm/panel/panel-samsung-ams495qa01.c -- 2.25.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH V3 1/2] dt-bindings: display: panel: Add Samsung AMS495QA01 bindings 2022-09-26 16:43 ` Chris Morgan @ 2022-09-26 16:43 ` Chris Morgan -1 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, robh+dt, daniel, airlied, sam, thierry.reding, Chris Morgan, Maya Matuszczyk From: Chris Morgan <macromorgan@hotmail.com> Add documentation for the Samsung AMS495QA01 panel. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> --- .../display/panel/samsung,ams495qa01.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml diff --git a/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml b/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml new file mode 100644 index 000000000000..d736a536b919 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/samsung,ams495qa01.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung AMS495QA01 4.95in 960x544 DSI/SPI panel + +maintainers: + - Chris Morgan <macromorgan@hotmail.com> + +allOf: + - $ref: panel-common.yaml# + +properties: + compatible: + const: samsung,ams495qa01 + + reg: true + reset-gpios: true + elvdd-supply: + description: regulator that supplies voltage to the panel display + enable-gpios: true + port: true + vdd-supply: + description: regulator that supplies voltage to panel logic + +required: + - compatible + - reg + - vdd-supply + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + spi { + #address-cells = <1>; + #size-cells = <0>; + panel@0 { + compatible = "samsung,ams495qa01"; + reg = <0>; + enable-gpios = <&gpio4 15 GPIO_ACTIVE_HIGH>; + reset-gpios = <&gpio4 0 GPIO_ACTIVE_LOW>; + vdd-supply = <&vcc3v3_lcd0_n>; + + port { + mipi_in_panel: endpoint { + remote-endpoint = <&mipi_out_panel>; + }; + }; + }; + }; + +... -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH V3 1/2] dt-bindings: display: panel: Add Samsung AMS495QA01 bindings @ 2022-09-26 16:43 ` Chris Morgan 0 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, Chris Morgan, robh+dt, thierry.reding, sam, Maya Matuszczyk From: Chris Morgan <macromorgan@hotmail.com> Add documentation for the Samsung AMS495QA01 panel. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> --- .../display/panel/samsung,ams495qa01.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml diff --git a/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml b/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml new file mode 100644 index 000000000000..d736a536b919 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/samsung,ams495qa01.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung AMS495QA01 4.95in 960x544 DSI/SPI panel + +maintainers: + - Chris Morgan <macromorgan@hotmail.com> + +allOf: + - $ref: panel-common.yaml# + +properties: + compatible: + const: samsung,ams495qa01 + + reg: true + reset-gpios: true + elvdd-supply: + description: regulator that supplies voltage to the panel display + enable-gpios: true + port: true + vdd-supply: + description: regulator that supplies voltage to panel logic + +required: + - compatible + - reg + - vdd-supply + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + spi { + #address-cells = <1>; + #size-cells = <0>; + panel@0 { + compatible = "samsung,ams495qa01"; + reg = <0>; + enable-gpios = <&gpio4 15 GPIO_ACTIVE_HIGH>; + reset-gpios = <&gpio4 0 GPIO_ACTIVE_LOW>; + vdd-supply = <&vcc3v3_lcd0_n>; + + port { + mipi_in_panel: endpoint { + remote-endpoint = <&mipi_out_panel>; + }; + }; + }; + }; + +... -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH V3 1/2] dt-bindings: display: panel: Add Samsung AMS495QA01 bindings 2022-09-26 16:43 ` Chris Morgan @ 2022-09-29 21:34 ` Rob Herring -1 siblings, 0 replies; 8+ messages in thread From: Rob Herring @ 2022-09-29 21:34 UTC (permalink / raw) To: Chris Morgan Cc: Maya Matuszczyk, airlied, thierry.reding, sam, dri-devel, robh+dt, devicetree, daniel, Chris Morgan, krzysztof.kozlowski+dt On Mon, 26 Sep 2022 11:43:32 -0500, Chris Morgan wrote: > From: Chris Morgan <macromorgan@hotmail.com> > > Add documentation for the Samsung AMS495QA01 panel. > > Signed-off-by: Chris Morgan <macromorgan@hotmail.com> > Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> > --- > .../display/panel/samsung,ams495qa01.yaml | 56 +++++++++++++++++++ > 1 file changed, 56 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml > Reviewed-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH V3 1/2] dt-bindings: display: panel: Add Samsung AMS495QA01 bindings @ 2022-09-29 21:34 ` Rob Herring 0 siblings, 0 replies; 8+ messages in thread From: Rob Herring @ 2022-09-29 21:34 UTC (permalink / raw) To: Chris Morgan Cc: devicetree, Chris Morgan, krzysztof.kozlowski+dt, robh+dt, thierry.reding, dri-devel, sam, Maya Matuszczyk On Mon, 26 Sep 2022 11:43:32 -0500, Chris Morgan wrote: > From: Chris Morgan <macromorgan@hotmail.com> > > Add documentation for the Samsung AMS495QA01 panel. > > Signed-off-by: Chris Morgan <macromorgan@hotmail.com> > Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> > --- > .../display/panel/samsung,ams495qa01.yaml | 56 +++++++++++++++++++ > 1 file changed, 56 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,ams495qa01.yaml > Reviewed-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH V3 2/2] drm/panel: Add Samsung AMS495QA01 MIPI-DSI LCD panel 2022-09-26 16:43 ` Chris Morgan @ 2022-09-26 16:43 ` Chris Morgan -1 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, robh+dt, daniel, airlied, sam, thierry.reding, Chris Morgan, Maya Matuszczyk From: Chris Morgan <macromorgan@hotmail.com> Support Samsung AMS495QA01 panel as found on the Anbernic RG503. Note This panel receives video signals via DSI, however it receives commands via 3-wire SPI. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> --- drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + .../gpu/drm/panel/panel-samsung-ams495qa01.c | 547 ++++++++++++++++++ 3 files changed, 558 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-samsung-ams495qa01.c diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index a9043eacce97..954b66a2adee 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -444,6 +444,16 @@ config DRM_PANEL_RONBO_RB070D30 Say Y here if you want to enable support for Ronbo Electronics RB070D30 1024x600 DSI panel. +config DRM_PANEL_SAMSUNG_AMS495QA01 + tristate "Samsung AMS495QA01 DSI panel" + depends on OF && SPI + depends on DRM_MIPI_DSI + select DRM_MIPI_DBI + help + DRM panel driver for the Samsung AMS495QA01 panel. This panel + receives video data via DSI but commands via 3-Wire 9-bit + SPI. + config DRM_PANEL_SAMSUNG_ATNA33XC20 tristate "Samsung ATNA33XC20 eDP panel" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 34e717382dbb..de0b57baf851 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o +obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS495QA01) += panel-samsung-ams495qa01.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o diff --git a/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c b/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c new file mode 100644 index 000000000000..b59839d026da --- /dev/null +++ b/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c @@ -0,0 +1,547 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Samsung ams495qa01 MIPI-DSI panel driver + * Copyright (C) 2022 Chris Morgan + */ + +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/media-bus-format.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <video/mipi_display.h> + +struct ams495qa01_panel_info { + /** @display_modes: the supported display modes */ + const struct drm_display_mode *display_modes; + /** @num_modes: the number of supported display modes */ + unsigned int num_modes; + /** @width_mm: panel width in mm */ + u16 width_mm; + /** @height_mm: panel height in mm */ + u16 height_mm; + /** @bus_flags: drm bus flags for panel */ + u32 bus_flags; +}; + +struct ams495qa01 { + /** @dev: the container device */ + struct device *dev; + /** @dbi: the DBI bus abstraction handle */ + struct mipi_dbi dbi; + /** @panel: the DRM panel instance for this device */ + struct drm_panel panel; + /** @reset: reset GPIO line */ + struct gpio_desc *reset; + /** @enable: enable GPIO line */ + struct gpio_desc *enable; + /** @reg_vdd: VDD supply regulator for panel logic */ + struct regulator *reg_vdd; + /** @reg_elvdd: ELVDD supply regulator for panel display */ + struct regulator *reg_elvdd; + /** @dsi_dev: DSI child device (panel) */ + struct mipi_dsi_device *dsi_dev; + /** @bl_dev: pseudo-backlight device for oled panel */ + struct backlight_device *bl_dev; + /** @panel_info: struct containing panel timing and info */ + const struct ams495qa01_panel_info *panel_info; + /** @prepared: value tracking panel prepare status */ + bool prepared; +}; + +#define NUM_GAMMA_LEVELS 16 +#define GAMMA_TABLE_COUNT 23 +#define MAX_BRIGHTNESS (NUM_GAMMA_LEVELS - 1) + +/* Table of gamma values provided in datasheet */ +static u8 ams495qa01_gamma[NUM_GAMMA_LEVELS][GAMMA_TABLE_COUNT] = { + {0x01, 0x79, 0x78, 0x8d, 0xd9, 0xdf, 0xd5, 0xcb, 0xcf, 0xc5, + 0xe5, 0xe0, 0xe4, 0xdc, 0xb8, 0xd4, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x7d, 0x7c, 0x92, 0xd7, 0xdd, 0xd2, 0xcb, 0xd0, 0xc6, + 0xe5, 0xe1, 0xe3, 0xda, 0xbd, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x7f, 0x7e, 0x95, 0xd7, 0xde, 0xd2, 0xcb, 0xcf, 0xc5, + 0xe5, 0xe3, 0xe3, 0xda, 0xbf, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x82, 0x81, 0x99, 0xd6, 0xdd, 0xd1, 0xca, 0xcf, 0xc3, + 0xe4, 0xe3, 0xe3, 0xda, 0xc2, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x84, 0x83, 0x9b, 0xd7, 0xde, 0xd2, 0xc8, 0xce, 0xc2, + 0xe4, 0xe3, 0xe2, 0xd9, 0xc3, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x87, 0x86, 0x9f, 0xd6, 0xdd, 0xd1, 0xc7, 0xce, 0xc1, + 0xe4, 0xe3, 0xe2, 0xd9, 0xc6, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x89, 0x89, 0xa2, 0xd5, 0xdb, 0xcf, 0xc8, 0xcf, 0xc2, + 0xe3, 0xe3, 0xe1, 0xd9, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8b, 0x8b, 0xa5, 0xd5, 0xdb, 0xcf, 0xc7, 0xce, 0xc0, + 0xe3, 0xe3, 0xe1, 0xd8, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8d, 0x8d, 0xa7, 0xd5, 0xdb, 0xcf, 0xc6, 0xce, 0xc0, + 0xe4, 0xe4, 0xe1, 0xd7, 0xc8, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8f, 0x8f, 0xaa, 0xd4, 0xdb, 0xce, 0xc6, 0xcd, 0xbf, + 0xe3, 0xe3, 0xe1, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x91, 0x91, 0xac, 0xd3, 0xda, 0xce, 0xc5, 0xcd, 0xbe, + 0xe3, 0xe3, 0xe0, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x93, 0x93, 0xaf, 0xd3, 0xda, 0xcd, 0xc5, 0xcd, 0xbe, + 0xe2, 0xe3, 0xdf, 0xd6, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x95, 0x95, 0xb1, 0xd2, 0xd9, 0xcc, 0xc4, 0xcd, 0xbe, + 0xe2, 0xe3, 0xdf, 0xd7, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x99, 0x99, 0xb6, 0xd1, 0xd9, 0xcc, 0xc3, 0xcb, 0xbc, + 0xe2, 0xe4, 0xdf, 0xd6, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x9c, 0x9c, 0xba, 0xd0, 0xd8, 0xcb, 0xc3, 0xcb, 0xbb, + 0xe2, 0xe4, 0xdf, 0xd6, 0xce, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x9f, 0x9f, 0xbe, 0xcf, 0xd7, 0xc9, 0xc2, 0xcb, 0xbb, + 0xe1, 0xe3, 0xde, 0xd6, 0xd0, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, +}; + +/* + * Table of elvss values provided in datasheet and corresponds to + * gamma values. + */ +static u8 ams495qa01_elvss[NUM_GAMMA_LEVELS] = { + 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, + 0x15, 0x15, 0x14, 0x14, 0x13, 0x12, +}; + +static inline struct ams495qa01 *to_ams495qa01(struct drm_panel *panel) +{ + return container_of(panel, struct ams495qa01, panel); +} + +static int ams495qa01_update_gamma(struct mipi_dbi *dbi, u32 brightness) +{ + u32 tmp = brightness; + + /* Set gamma values */ + mipi_dbi_command_buf(dbi, 0xf9, ams495qa01_gamma[tmp], + ARRAY_SIZE(ams495qa01_gamma[tmp])); + /* Set gamma change */ + mipi_dbi_command(dbi, 0xf9, 0x00); + /* Undocumented command */ + mipi_dbi_command(dbi, 0x26, 0x00); + /* Set ELVSS value */ + mipi_dbi_command(dbi, 0xb2, ams495qa01_elvss[tmp]); + + return 0; +} + +static int ams495qa01_prepare(struct drm_panel *panel) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + struct mipi_dbi *dbi = &db->dbi; + int ret; + + if (db->prepared) + return 0; + + /* Power up */ + ret = regulator_enable(db->reg_vdd); + if (ret) { + dev_err(db->dev, "failed to enable vdd regulator: %d\n", ret); + return ret; + } + if (db->reg_elvdd) { + ret = regulator_enable(db->reg_elvdd); + if (ret) { + dev_err(db->dev, + "failed to enable elvdd regulator: %d\n", ret); + regulator_disable(db->reg_vdd); + return ret; + } + } + + /* Enable */ + if (db->enable) + gpiod_set_value_cansleep(db->enable, 1); + + msleep(50); + + /* Reset */ + gpiod_set_value_cansleep(db->reset, 1); + usleep_range(1000, 5000); + gpiod_set_value_cansleep(db->reset, 0); + msleep(20); + + /* Panel Init Sequence */ + + /* Password to start command sequence */ + mipi_dbi_command(dbi, 0xf0, 0x5a, 0x5a); + mipi_dbi_command(dbi, 0xf1, 0x5a, 0x5a); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xb0, 0x02); + mipi_dbi_command(dbi, 0xf3, 0x3b); + + /* Analog Power condition set */ + mipi_dbi_command(dbi, 0xf4, 0x33, 0x42, 0x00, 0x08); + mipi_dbi_command(dbi, 0xf5, 0x00, 0x06, 0x26, 0x35, 0x03); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xf6, 0x02); + mipi_dbi_command(dbi, 0xc6, 0x0b, 0x00, 0x00, 0x3c, 0x00, 0x22, + 0x00, 0x00, 0x00, 0x00); + + /* GTCON set */ + mipi_dbi_command(dbi, 0xf7, 0x20); + + /* TEMP_SWIRE set */ + mipi_dbi_command(dbi, 0xb2, 0x06, 0x06, 0x06, 0x06); + + /* ELVSS_CON set */ + mipi_dbi_command(dbi, 0xb1, 0x07, 0x00, 0x10); + + /* Gateless signal set */ + mipi_dbi_command(dbi, 0xf8, 0x7f, 0x7a, 0x89, 0x67, 0x26, 0x38, + 0x00, 0x00, 0x09, 0x67, 0x70, 0x88, 0x7a, + 0x76, 0x05, 0x09, 0x23, 0x23, 0x23); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xb5, 0xff, 0xef, 0x35, 0x42, 0x0d, 0xd7, + 0xff, 0x07, 0xff, 0xff, 0xfd, 0x00, 0x01, + 0xff, 0x05, 0x12, 0x0f, 0xff, 0xff, 0xff, + 0xff); + mipi_dbi_command(dbi, 0xb4, 0x15); + mipi_dbi_command(dbi, 0xb3, 0x00); + + ams495qa01_update_gamma(dbi, MAX_BRIGHTNESS); + + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(200); + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + usleep_range(10000, 15000); + + db->prepared = true; + + return 0; +} + +static int ams495qa01_unprepare(struct drm_panel *panel) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + struct mipi_dbi *dbi = &db->dbi; + + if (!db->prepared) + return 0; + + /* Panel Exit Sequence */ + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); + msleep(20); + mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE); + usleep_range(10000, 15000); + + if (db->enable) + gpiod_set_value_cansleep(db->enable, 0); + if (db->reg_elvdd) + regulator_disable(db->reg_elvdd); + regulator_disable(db->reg_vdd); + msleep(20); + + db->prepared = false; + + return 0; +} + +static int ams495qa01_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + const struct ams495qa01_panel_info *panel_info = db->panel_info; + struct drm_display_mode *mode; + static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; + unsigned int i; + + for (i = 0; i < panel_info->num_modes; i++) { + mode = drm_mode_duplicate(connector->dev, + &panel_info->display_modes[i]); + if (!mode) + return -ENOMEM; + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER; + if (panel_info->num_modes == 1) + mode->type |= DRM_MODE_TYPE_PREFERRED; + + drm_mode_probed_add(connector, mode); + } + + connector->display_info.bpc = 8; + connector->display_info.width_mm = panel_info->width_mm; + connector->display_info.height_mm = panel_info->height_mm; + connector->display_info.bus_flags = panel_info->bus_flags; + + drm_display_info_set_bus_formats(&connector->display_info, + &bus_format, 1); + + return 1; +} + +static const struct drm_panel_funcs ams495qa01_drm_funcs = { + .unprepare = ams495qa01_unprepare, + .prepare = ams495qa01_prepare, + .get_modes = ams495qa01_get_modes, +}; + +static int ams495qa01_set_brightness(struct backlight_device *bd) +{ + struct ams495qa01 *db = bl_get_data(bd); + struct mipi_dbi *dbi = &db->dbi; + int brightness = bd->props.brightness; + + ams495qa01_update_gamma(dbi, brightness); + + return 0; +} + +static const struct backlight_ops ams495qa01_backlight_ops = { + .update_status = ams495qa01_set_brightness, +}; + +static int ams495qa01_backlight_register(struct ams495qa01 *db) +{ + struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = MAX_BRIGHTNESS, + .max_brightness = MAX_BRIGHTNESS, + }; + struct device *dev = db->dev; + int ret = 0; + + db->bl_dev = devm_backlight_device_register(dev, "panel", dev, db, + &ams495qa01_backlight_ops, + &props); + if (IS_ERR(db->bl_dev)) { + ret = PTR_ERR(db->bl_dev); + dev_err(dev, "error registering backlight device (%d)\n", ret); + } + + return ret; +} + +static int ams495qa01_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct device_node *endpoint, *dsi_host_node; + struct mipi_dsi_host *dsi_host; + struct ams495qa01 *db; + int ret; + struct mipi_dsi_device_info info = { + .type = "ams495qa01", + .channel = 0, + .node = NULL, + }; + + db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL); + if (!db) + return -ENOMEM; + + spi_set_drvdata(spi, db); + + db->dev = dev; + + db->panel_info = of_device_get_match_data(dev); + if (!db->panel_info) + return -EINVAL; + + db->reg_vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(db->reg_vdd)) + return dev_err_probe(dev, PTR_ERR(db->reg_vdd), + "Failed to get vdd supply\n"); + + db->reg_elvdd = devm_regulator_get_optional(dev, "elvdd"); + if (IS_ERR(db->reg_elvdd)) + db->reg_elvdd = NULL; + + db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(db->reset)) { + ret = PTR_ERR(db->reset); + return dev_err_probe(dev, ret, "no RESET GPIO\n"); + } + + db->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(db->enable)) { + ret = PTR_ERR(db->enable); + return dev_err_probe(dev, ret, "cannot get ENABLE GPIO\n"); + } + + ret = mipi_dbi_spi_init(spi, &db->dbi, NULL); + if (ret) + return dev_err_probe(dev, ret, "MIPI DBI init failed\n"); + + /* + * Get the DSI controller that is supplying data for this display + * which is controlled via SPI 3-wire. + */ + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (!endpoint) { + dev_err(dev, "failed to get endpoint\n"); + return -ENODEV; + } + dsi_host_node = of_graph_get_remote_port_parent(endpoint); + if (!dsi_host_node) { + dev_err(dev, "failed to get remote port parent\n"); + goto put_endpoint; + } + dsi_host = of_find_mipi_dsi_host_by_node(dsi_host_node); + if (!dsi_host) { + dev_err(dev, "failed to find dsi host\n"); + goto put_host; + } + info.node = of_graph_get_remote_port(endpoint); + if (!info.node) { + dev_err(dev, "failed to get remote port node\n"); + ret = -ENODEV; + goto put_host; + } + + db->dsi_dev = devm_mipi_dsi_device_register_full(dev, dsi_host, &info); + if (IS_ERR(db->dsi_dev)) { + dev_err(dev, "failed to register dsi device: %ld\n", + PTR_ERR(db->dsi_dev)); + ret = PTR_ERR(db->dsi_dev); + goto put_host; + } + + db->dsi_dev->lanes = 2; + db->dsi_dev->format = MIPI_DSI_FMT_RGB888; + db->dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; + + drm_panel_init(&db->panel, dev, &ams495qa01_drm_funcs, + DRM_MODE_CONNECTOR_DSI); + + ret = ams495qa01_backlight_register(db); + if (ret < 0) + return ret; + + drm_panel_add(&db->panel); + + ret = devm_mipi_dsi_attach(dev, db->dsi_dev); + if (ret < 0) { + dev_err(dev, "mipi_dsi_attach failed: %d\n", ret); + drm_panel_remove(&db->panel); + return ret; + } + + of_node_put(dsi_host_node); + of_node_put(endpoint); + + return 0; + +put_host: + of_node_put(dsi_host_node); + +put_endpoint: + of_node_put(endpoint); + return -ENODEV; +} + +static void ams495qa01_shutdown(struct spi_device *spi) +{ + struct ams495qa01 *db = spi_get_drvdata(spi); + int ret; + + ret = drm_panel_unprepare(&db->panel); + if (ret < 0) + dev_err(&spi->dev, "Failed to unprepare panel: %d\n", ret); + + ret = drm_panel_disable(&db->panel); + if (ret < 0) + dev_err(&spi->dev, "Failed to disable panel: %d\n", ret); +} + +static void ams495qa01_remove(struct spi_device *spi) +{ + struct ams495qa01 *db = spi_get_drvdata(spi); + + ams495qa01_shutdown(spi); + + drm_panel_remove(&db->panel); +} + +static const struct drm_display_mode ams495qa01_modes[] = { + { /* 60hz */ + .clock = 33500, + .hdisplay = 960, + .hsync_start = 960 + 10, + .hsync_end = 960 + 10 + 2, + .htotal = 960 + 10 + 2 + 10, + .vdisplay = 544, + .vsync_start = 544 + 10, + .vsync_end = 544 + 10 + 2, + .vtotal = 544 + 10 + 2 + 10, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, + { /* 50hz */ + .clock = 27800, + .hdisplay = 960, + .hsync_start = 960 + 10, + .hsync_end = 960 + 10 + 2, + .htotal = 960 + 10 + 2 + 10, + .vdisplay = 544, + .vsync_start = 544 + 10, + .vsync_end = 544 + 10 + 2, + .vtotal = 544 + 10 + 2 + 10, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, +}; + +static const struct ams495qa01_panel_info ams495qa01_info = { + .display_modes = ams495qa01_modes, + .num_modes = ARRAY_SIZE(ams495qa01_modes), + .width_mm = 117, + .height_mm = 74, + .bus_flags = DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE, +}; + +static const struct of_device_id ams495qa01_match[] = { + { .compatible = "samsung,ams495qa01", .data = &ams495qa01_info }, + {}, +}; +MODULE_DEVICE_TABLE(of, ams495qa01_match); + +static const struct spi_device_id ams495qa01_ids[] = { + { "ams495qa01", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(spi, ams495qa01_ids); + +static struct spi_driver ams495qa01_driver = { + .driver = { + .name = "ams495qa01-panel", + .of_match_table = ams495qa01_match, + }, + .id_table = ams495qa01_ids, + .probe = ams495qa01_probe, + .remove = ams495qa01_remove, + .shutdown = ams495qa01_shutdown, +}; +module_spi_driver(ams495qa01_driver); + +MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>"); +MODULE_DESCRIPTION("Samsung ams495qa01 panel driver"); +MODULE_LICENSE("GPL"); -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH V3 2/2] drm/panel: Add Samsung AMS495QA01 MIPI-DSI LCD panel @ 2022-09-26 16:43 ` Chris Morgan 0 siblings, 0 replies; 8+ messages in thread From: Chris Morgan @ 2022-09-26 16:43 UTC (permalink / raw) To: dri-devel Cc: devicetree, krzysztof.kozlowski+dt, Chris Morgan, robh+dt, thierry.reding, sam, Maya Matuszczyk From: Chris Morgan <macromorgan@hotmail.com> Support Samsung AMS495QA01 panel as found on the Anbernic RG503. Note This panel receives video signals via DSI, however it receives commands via 3-wire SPI. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com> --- drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + .../gpu/drm/panel/panel-samsung-ams495qa01.c | 547 ++++++++++++++++++ 3 files changed, 558 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-samsung-ams495qa01.c diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index a9043eacce97..954b66a2adee 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -444,6 +444,16 @@ config DRM_PANEL_RONBO_RB070D30 Say Y here if you want to enable support for Ronbo Electronics RB070D30 1024x600 DSI panel. +config DRM_PANEL_SAMSUNG_AMS495QA01 + tristate "Samsung AMS495QA01 DSI panel" + depends on OF && SPI + depends on DRM_MIPI_DSI + select DRM_MIPI_DBI + help + DRM panel driver for the Samsung AMS495QA01 panel. This panel + receives video data via DSI but commands via 3-Wire 9-bit + SPI. + config DRM_PANEL_SAMSUNG_ATNA33XC20 tristate "Samsung ATNA33XC20 eDP panel" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 34e717382dbb..de0b57baf851 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o +obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS495QA01) += panel-samsung-ams495qa01.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o diff --git a/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c b/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c new file mode 100644 index 000000000000..b59839d026da --- /dev/null +++ b/drivers/gpu/drm/panel/panel-samsung-ams495qa01.c @@ -0,0 +1,547 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Samsung ams495qa01 MIPI-DSI panel driver + * Copyright (C) 2022 Chris Morgan + */ + +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/media-bus-format.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <video/mipi_display.h> + +struct ams495qa01_panel_info { + /** @display_modes: the supported display modes */ + const struct drm_display_mode *display_modes; + /** @num_modes: the number of supported display modes */ + unsigned int num_modes; + /** @width_mm: panel width in mm */ + u16 width_mm; + /** @height_mm: panel height in mm */ + u16 height_mm; + /** @bus_flags: drm bus flags for panel */ + u32 bus_flags; +}; + +struct ams495qa01 { + /** @dev: the container device */ + struct device *dev; + /** @dbi: the DBI bus abstraction handle */ + struct mipi_dbi dbi; + /** @panel: the DRM panel instance for this device */ + struct drm_panel panel; + /** @reset: reset GPIO line */ + struct gpio_desc *reset; + /** @enable: enable GPIO line */ + struct gpio_desc *enable; + /** @reg_vdd: VDD supply regulator for panel logic */ + struct regulator *reg_vdd; + /** @reg_elvdd: ELVDD supply regulator for panel display */ + struct regulator *reg_elvdd; + /** @dsi_dev: DSI child device (panel) */ + struct mipi_dsi_device *dsi_dev; + /** @bl_dev: pseudo-backlight device for oled panel */ + struct backlight_device *bl_dev; + /** @panel_info: struct containing panel timing and info */ + const struct ams495qa01_panel_info *panel_info; + /** @prepared: value tracking panel prepare status */ + bool prepared; +}; + +#define NUM_GAMMA_LEVELS 16 +#define GAMMA_TABLE_COUNT 23 +#define MAX_BRIGHTNESS (NUM_GAMMA_LEVELS - 1) + +/* Table of gamma values provided in datasheet */ +static u8 ams495qa01_gamma[NUM_GAMMA_LEVELS][GAMMA_TABLE_COUNT] = { + {0x01, 0x79, 0x78, 0x8d, 0xd9, 0xdf, 0xd5, 0xcb, 0xcf, 0xc5, + 0xe5, 0xe0, 0xe4, 0xdc, 0xb8, 0xd4, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x7d, 0x7c, 0x92, 0xd7, 0xdd, 0xd2, 0xcb, 0xd0, 0xc6, + 0xe5, 0xe1, 0xe3, 0xda, 0xbd, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x7f, 0x7e, 0x95, 0xd7, 0xde, 0xd2, 0xcb, 0xcf, 0xc5, + 0xe5, 0xe3, 0xe3, 0xda, 0xbf, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x82, 0x81, 0x99, 0xd6, 0xdd, 0xd1, 0xca, 0xcf, 0xc3, + 0xe4, 0xe3, 0xe3, 0xda, 0xc2, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x84, 0x83, 0x9b, 0xd7, 0xde, 0xd2, 0xc8, 0xce, 0xc2, + 0xe4, 0xe3, 0xe2, 0xd9, 0xc3, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x87, 0x86, 0x9f, 0xd6, 0xdd, 0xd1, 0xc7, 0xce, 0xc1, + 0xe4, 0xe3, 0xe2, 0xd9, 0xc6, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x89, 0x89, 0xa2, 0xd5, 0xdb, 0xcf, 0xc8, 0xcf, 0xc2, + 0xe3, 0xe3, 0xe1, 0xd9, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8b, 0x8b, 0xa5, 0xd5, 0xdb, 0xcf, 0xc7, 0xce, 0xc0, + 0xe3, 0xe3, 0xe1, 0xd8, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8d, 0x8d, 0xa7, 0xd5, 0xdb, 0xcf, 0xc6, 0xce, 0xc0, + 0xe4, 0xe4, 0xe1, 0xd7, 0xc8, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x8f, 0x8f, 0xaa, 0xd4, 0xdb, 0xce, 0xc6, 0xcd, 0xbf, + 0xe3, 0xe3, 0xe1, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x91, 0x91, 0xac, 0xd3, 0xda, 0xce, 0xc5, 0xcd, 0xbe, + 0xe3, 0xe3, 0xe0, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x93, 0x93, 0xaf, 0xd3, 0xda, 0xcd, 0xc5, 0xcd, 0xbe, + 0xe2, 0xe3, 0xdf, 0xd6, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x95, 0x95, 0xb1, 0xd2, 0xd9, 0xcc, 0xc4, 0xcd, 0xbe, + 0xe2, 0xe3, 0xdf, 0xd7, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x99, 0x99, 0xb6, 0xd1, 0xd9, 0xcc, 0xc3, 0xcb, 0xbc, + 0xe2, 0xe4, 0xdf, 0xd6, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x9c, 0x9c, 0xba, 0xd0, 0xd8, 0xcb, 0xc3, 0xcb, 0xbb, + 0xe2, 0xe4, 0xdf, 0xd6, 0xce, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, + {0x01, 0x9f, 0x9f, 0xbe, 0xcf, 0xd7, 0xc9, 0xc2, 0xcb, 0xbb, + 0xe1, 0xe3, 0xde, 0xd6, 0xd0, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, + 0x00, 0x2f}, +}; + +/* + * Table of elvss values provided in datasheet and corresponds to + * gamma values. + */ +static u8 ams495qa01_elvss[NUM_GAMMA_LEVELS] = { + 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, + 0x15, 0x15, 0x14, 0x14, 0x13, 0x12, +}; + +static inline struct ams495qa01 *to_ams495qa01(struct drm_panel *panel) +{ + return container_of(panel, struct ams495qa01, panel); +} + +static int ams495qa01_update_gamma(struct mipi_dbi *dbi, u32 brightness) +{ + u32 tmp = brightness; + + /* Set gamma values */ + mipi_dbi_command_buf(dbi, 0xf9, ams495qa01_gamma[tmp], + ARRAY_SIZE(ams495qa01_gamma[tmp])); + /* Set gamma change */ + mipi_dbi_command(dbi, 0xf9, 0x00); + /* Undocumented command */ + mipi_dbi_command(dbi, 0x26, 0x00); + /* Set ELVSS value */ + mipi_dbi_command(dbi, 0xb2, ams495qa01_elvss[tmp]); + + return 0; +} + +static int ams495qa01_prepare(struct drm_panel *panel) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + struct mipi_dbi *dbi = &db->dbi; + int ret; + + if (db->prepared) + return 0; + + /* Power up */ + ret = regulator_enable(db->reg_vdd); + if (ret) { + dev_err(db->dev, "failed to enable vdd regulator: %d\n", ret); + return ret; + } + if (db->reg_elvdd) { + ret = regulator_enable(db->reg_elvdd); + if (ret) { + dev_err(db->dev, + "failed to enable elvdd regulator: %d\n", ret); + regulator_disable(db->reg_vdd); + return ret; + } + } + + /* Enable */ + if (db->enable) + gpiod_set_value_cansleep(db->enable, 1); + + msleep(50); + + /* Reset */ + gpiod_set_value_cansleep(db->reset, 1); + usleep_range(1000, 5000); + gpiod_set_value_cansleep(db->reset, 0); + msleep(20); + + /* Panel Init Sequence */ + + /* Password to start command sequence */ + mipi_dbi_command(dbi, 0xf0, 0x5a, 0x5a); + mipi_dbi_command(dbi, 0xf1, 0x5a, 0x5a); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xb0, 0x02); + mipi_dbi_command(dbi, 0xf3, 0x3b); + + /* Analog Power condition set */ + mipi_dbi_command(dbi, 0xf4, 0x33, 0x42, 0x00, 0x08); + mipi_dbi_command(dbi, 0xf5, 0x00, 0x06, 0x26, 0x35, 0x03); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xf6, 0x02); + mipi_dbi_command(dbi, 0xc6, 0x0b, 0x00, 0x00, 0x3c, 0x00, 0x22, + 0x00, 0x00, 0x00, 0x00); + + /* GTCON set */ + mipi_dbi_command(dbi, 0xf7, 0x20); + + /* TEMP_SWIRE set */ + mipi_dbi_command(dbi, 0xb2, 0x06, 0x06, 0x06, 0x06); + + /* ELVSS_CON set */ + mipi_dbi_command(dbi, 0xb1, 0x07, 0x00, 0x10); + + /* Gateless signal set */ + mipi_dbi_command(dbi, 0xf8, 0x7f, 0x7a, 0x89, 0x67, 0x26, 0x38, + 0x00, 0x00, 0x09, 0x67, 0x70, 0x88, 0x7a, + 0x76, 0x05, 0x09, 0x23, 0x23, 0x23); + + /* Undocumented commands */ + mipi_dbi_command(dbi, 0xb5, 0xff, 0xef, 0x35, 0x42, 0x0d, 0xd7, + 0xff, 0x07, 0xff, 0xff, 0xfd, 0x00, 0x01, + 0xff, 0x05, 0x12, 0x0f, 0xff, 0xff, 0xff, + 0xff); + mipi_dbi_command(dbi, 0xb4, 0x15); + mipi_dbi_command(dbi, 0xb3, 0x00); + + ams495qa01_update_gamma(dbi, MAX_BRIGHTNESS); + + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(200); + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + usleep_range(10000, 15000); + + db->prepared = true; + + return 0; +} + +static int ams495qa01_unprepare(struct drm_panel *panel) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + struct mipi_dbi *dbi = &db->dbi; + + if (!db->prepared) + return 0; + + /* Panel Exit Sequence */ + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); + msleep(20); + mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE); + usleep_range(10000, 15000); + + if (db->enable) + gpiod_set_value_cansleep(db->enable, 0); + if (db->reg_elvdd) + regulator_disable(db->reg_elvdd); + regulator_disable(db->reg_vdd); + msleep(20); + + db->prepared = false; + + return 0; +} + +static int ams495qa01_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct ams495qa01 *db = to_ams495qa01(panel); + const struct ams495qa01_panel_info *panel_info = db->panel_info; + struct drm_display_mode *mode; + static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; + unsigned int i; + + for (i = 0; i < panel_info->num_modes; i++) { + mode = drm_mode_duplicate(connector->dev, + &panel_info->display_modes[i]); + if (!mode) + return -ENOMEM; + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER; + if (panel_info->num_modes == 1) + mode->type |= DRM_MODE_TYPE_PREFERRED; + + drm_mode_probed_add(connector, mode); + } + + connector->display_info.bpc = 8; + connector->display_info.width_mm = panel_info->width_mm; + connector->display_info.height_mm = panel_info->height_mm; + connector->display_info.bus_flags = panel_info->bus_flags; + + drm_display_info_set_bus_formats(&connector->display_info, + &bus_format, 1); + + return 1; +} + +static const struct drm_panel_funcs ams495qa01_drm_funcs = { + .unprepare = ams495qa01_unprepare, + .prepare = ams495qa01_prepare, + .get_modes = ams495qa01_get_modes, +}; + +static int ams495qa01_set_brightness(struct backlight_device *bd) +{ + struct ams495qa01 *db = bl_get_data(bd); + struct mipi_dbi *dbi = &db->dbi; + int brightness = bd->props.brightness; + + ams495qa01_update_gamma(dbi, brightness); + + return 0; +} + +static const struct backlight_ops ams495qa01_backlight_ops = { + .update_status = ams495qa01_set_brightness, +}; + +static int ams495qa01_backlight_register(struct ams495qa01 *db) +{ + struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = MAX_BRIGHTNESS, + .max_brightness = MAX_BRIGHTNESS, + }; + struct device *dev = db->dev; + int ret = 0; + + db->bl_dev = devm_backlight_device_register(dev, "panel", dev, db, + &ams495qa01_backlight_ops, + &props); + if (IS_ERR(db->bl_dev)) { + ret = PTR_ERR(db->bl_dev); + dev_err(dev, "error registering backlight device (%d)\n", ret); + } + + return ret; +} + +static int ams495qa01_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct device_node *endpoint, *dsi_host_node; + struct mipi_dsi_host *dsi_host; + struct ams495qa01 *db; + int ret; + struct mipi_dsi_device_info info = { + .type = "ams495qa01", + .channel = 0, + .node = NULL, + }; + + db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL); + if (!db) + return -ENOMEM; + + spi_set_drvdata(spi, db); + + db->dev = dev; + + db->panel_info = of_device_get_match_data(dev); + if (!db->panel_info) + return -EINVAL; + + db->reg_vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(db->reg_vdd)) + return dev_err_probe(dev, PTR_ERR(db->reg_vdd), + "Failed to get vdd supply\n"); + + db->reg_elvdd = devm_regulator_get_optional(dev, "elvdd"); + if (IS_ERR(db->reg_elvdd)) + db->reg_elvdd = NULL; + + db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(db->reset)) { + ret = PTR_ERR(db->reset); + return dev_err_probe(dev, ret, "no RESET GPIO\n"); + } + + db->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(db->enable)) { + ret = PTR_ERR(db->enable); + return dev_err_probe(dev, ret, "cannot get ENABLE GPIO\n"); + } + + ret = mipi_dbi_spi_init(spi, &db->dbi, NULL); + if (ret) + return dev_err_probe(dev, ret, "MIPI DBI init failed\n"); + + /* + * Get the DSI controller that is supplying data for this display + * which is controlled via SPI 3-wire. + */ + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (!endpoint) { + dev_err(dev, "failed to get endpoint\n"); + return -ENODEV; + } + dsi_host_node = of_graph_get_remote_port_parent(endpoint); + if (!dsi_host_node) { + dev_err(dev, "failed to get remote port parent\n"); + goto put_endpoint; + } + dsi_host = of_find_mipi_dsi_host_by_node(dsi_host_node); + if (!dsi_host) { + dev_err(dev, "failed to find dsi host\n"); + goto put_host; + } + info.node = of_graph_get_remote_port(endpoint); + if (!info.node) { + dev_err(dev, "failed to get remote port node\n"); + ret = -ENODEV; + goto put_host; + } + + db->dsi_dev = devm_mipi_dsi_device_register_full(dev, dsi_host, &info); + if (IS_ERR(db->dsi_dev)) { + dev_err(dev, "failed to register dsi device: %ld\n", + PTR_ERR(db->dsi_dev)); + ret = PTR_ERR(db->dsi_dev); + goto put_host; + } + + db->dsi_dev->lanes = 2; + db->dsi_dev->format = MIPI_DSI_FMT_RGB888; + db->dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; + + drm_panel_init(&db->panel, dev, &ams495qa01_drm_funcs, + DRM_MODE_CONNECTOR_DSI); + + ret = ams495qa01_backlight_register(db); + if (ret < 0) + return ret; + + drm_panel_add(&db->panel); + + ret = devm_mipi_dsi_attach(dev, db->dsi_dev); + if (ret < 0) { + dev_err(dev, "mipi_dsi_attach failed: %d\n", ret); + drm_panel_remove(&db->panel); + return ret; + } + + of_node_put(dsi_host_node); + of_node_put(endpoint); + + return 0; + +put_host: + of_node_put(dsi_host_node); + +put_endpoint: + of_node_put(endpoint); + return -ENODEV; +} + +static void ams495qa01_shutdown(struct spi_device *spi) +{ + struct ams495qa01 *db = spi_get_drvdata(spi); + int ret; + + ret = drm_panel_unprepare(&db->panel); + if (ret < 0) + dev_err(&spi->dev, "Failed to unprepare panel: %d\n", ret); + + ret = drm_panel_disable(&db->panel); + if (ret < 0) + dev_err(&spi->dev, "Failed to disable panel: %d\n", ret); +} + +static void ams495qa01_remove(struct spi_device *spi) +{ + struct ams495qa01 *db = spi_get_drvdata(spi); + + ams495qa01_shutdown(spi); + + drm_panel_remove(&db->panel); +} + +static const struct drm_display_mode ams495qa01_modes[] = { + { /* 60hz */ + .clock = 33500, + .hdisplay = 960, + .hsync_start = 960 + 10, + .hsync_end = 960 + 10 + 2, + .htotal = 960 + 10 + 2 + 10, + .vdisplay = 544, + .vsync_start = 544 + 10, + .vsync_end = 544 + 10 + 2, + .vtotal = 544 + 10 + 2 + 10, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, + { /* 50hz */ + .clock = 27800, + .hdisplay = 960, + .hsync_start = 960 + 10, + .hsync_end = 960 + 10 + 2, + .htotal = 960 + 10 + 2 + 10, + .vdisplay = 544, + .vsync_start = 544 + 10, + .vsync_end = 544 + 10 + 2, + .vtotal = 544 + 10 + 2 + 10, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, +}; + +static const struct ams495qa01_panel_info ams495qa01_info = { + .display_modes = ams495qa01_modes, + .num_modes = ARRAY_SIZE(ams495qa01_modes), + .width_mm = 117, + .height_mm = 74, + .bus_flags = DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE, +}; + +static const struct of_device_id ams495qa01_match[] = { + { .compatible = "samsung,ams495qa01", .data = &ams495qa01_info }, + {}, +}; +MODULE_DEVICE_TABLE(of, ams495qa01_match); + +static const struct spi_device_id ams495qa01_ids[] = { + { "ams495qa01", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(spi, ams495qa01_ids); + +static struct spi_driver ams495qa01_driver = { + .driver = { + .name = "ams495qa01-panel", + .of_match_table = ams495qa01_match, + }, + .id_table = ams495qa01_ids, + .probe = ams495qa01_probe, + .remove = ams495qa01_remove, + .shutdown = ams495qa01_shutdown, +}; +module_spi_driver(ams495qa01_driver); + +MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>"); +MODULE_DESCRIPTION("Samsung ams495qa01 panel driver"); +MODULE_LICENSE("GPL"); -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
end of thread, other threads:[~2022-09-29 21:34 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2022-09-26 16:43 [PATCH V3 0/2] drm/panel: Add Samsung AMS495QA01 Panel Chris Morgan 2022-09-26 16:43 ` Chris Morgan 2022-09-26 16:43 ` [PATCH V3 1/2] dt-bindings: display: panel: Add Samsung AMS495QA01 bindings Chris Morgan 2022-09-26 16:43 ` Chris Morgan 2022-09-29 21:34 ` Rob Herring 2022-09-29 21:34 ` Rob Herring 2022-09-26 16:43 ` [PATCH V3 2/2] drm/panel: Add Samsung AMS495QA01 MIPI-DSI LCD panel Chris Morgan 2022-09-26 16:43 ` Chris Morgan
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.