On Wed 02 Sep 01:44 CDT 2020, Sumit Semwal wrote:

Novatek nt36672a is a display driver IC that can drive DSI panel. It is also present in the Tianma video mode panel, which is a FHD+ panel with a resolution of 1080x2246 and 6.18 inches size. It is found in some of the Poco F1 phones.

This patch adds the display driver for the IC, with support added for this tianma fhd video mode panel.

Signed-off-by: Sumit Semwal sumit.semwal@linaro.org Reviewed-by: Rob Herring robh@kernel.org

Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org

Regards, Bjorn

---

v2: remove ports node, making port@0 directly under panel@0 node. v3: updated to replace port@0 to just 'port'. v5: renamed to novatek,nt36672a, since the binding is for the IC and not the panel. v6: v5 review comments incorporated. - added enum for the compatible part, since it can be extended in future. - few cosmetic updates.

---

.../display/panel/novatek,nt36672a.yaml | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml new file mode 100644 index 000000000000..d2170de6b723 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml @@ -0,0 +1,87 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/novatek,nt36672a.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml#

+title: Novatek NT36672A based DSI display Panels

+maintainers:

• • Sumit Semwal sumit.semwal@linaro.org

+description: |

• The nt36672a IC from Novatek is a generic DSI Panel IC used to drive dsi
• panels.
• Right now, support is added only for a Tianma FHD+ LCD display panel with a
• resolution of 1080x2246. It is a video mode DSI panel.

+allOf:

• • $ref: panel-common.yaml#

+properties:

• compatible:
• items:

•  - enum:
  

•     - tianma,fhd-video
  

•  - const: novatek,nt36672a
  

• description: This indicates the panel manufacturer of the panel that is

•  in turn using the NT36672A panel driver. This compatible string
  

•  determines how the NT36672A panel driver is configured for the indicated
  

•  panel. The novatek,nt36672a compatible shall always be provided as a fallback.
  

• reset-gpios:
• description: phandle of gpio for reset line - This should be 8mA, gpio

•  can be configured using mux, pinctrl, pinctrl-names (active high)
  

• vddio-supply:
• description: phandle of the regulator that provides the supply voltage

•  Power IC supply
  

• vddpos-supply:
• description: phandle of the positive boost supply regulator
• vddneg-supply:
• description: phandle of the negative boost supply regulator
• reg: true
• port: true

+required:

• • compatible
• • reg
• • vddi0-supply
• • vddpos-supply
• • vddneg-supply
• • reset-gpios
• • port

+unevaluatedProperties: false

+examples:

• • |+
• #include <dt-bindings/gpio/gpio.h>
• dsi0 {

•    #address-cells = <1>;
  

•    #size-cells = <0>;
  

•    panel@0 {
  

•        compatible = "tianma,fhd-video", "novatek,nt36672a";
  

•        reg = <0>;
  

•        vddi0-supply = <&vreg_l14a_1p88>;
  

•        vddpos-supply = <&lab>;
  

•        vddneg-supply = <&ibb>;
  

•        reset-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>;
  

•        #address-cells = <1>;
  

•        #size-cells = <0>;
  

•        port {
  

•            tianma_nt36672a_in_0: endpoint {
  

•                remote-endpoint = <&dsi0_out>;
  

•            };
  

•        };
  

•    };
  

• };

+...

2.28.0

Hi Sam,

On Thu, 15 Oct 2020 at 00:14, Sam Ravnborg sam@ravnborg.org wrote:

Hi Sumit. On Wed, Sep 02, 2020 at 12:14:06PM +0530, Sumit Semwal wrote:

...

Novatek nt36672a is a display driver IC that can drive DSI panel. It is also present in the Tianma video mode panel, which is a FHD+ panel with a resolution of 1080x2246 and 6.18 inches size. It is found in some of the Poco F1 phones.

This patch adds the display driver for the IC, with support added for this tianma fhd video mode panel.

Signed-off-by: Sumit Semwal sumit.semwal@linaro.org Reviewed-by: Rob Herring robh@kernel.org

Reviewed-by: Sam Ravnborg sam@ravnborg.org I assume you will apply the patch yourself.

Thanks, I will.

    Sam

Best, Sumit.

...

---

v2: remove ports node, making port@0 directly under panel@0 node. v3: updated to replace port@0 to just 'port'. v5: renamed to novatek,nt36672a, since the binding is for the IC and not the panel. v6: v5 review comments incorporated. - added enum for the compatible part, since it can be extended in future. - few cosmetic updates.

---

.../display/panel/novatek,nt36672a.yaml | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml new file mode 100644 index 000000000000..d2170de6b723 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml @@ -0,0 +1,87 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/novatek,nt36672a.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml#

+title: Novatek NT36672A based DSI display Panels

+maintainers:

• • Sumit Semwal sumit.semwal@linaro.org

+description: |

• The nt36672a IC from Novatek is a generic DSI Panel IC used to drive dsi
• panels.
• Right now, support is added only for a Tianma FHD+ LCD display panel with a
• resolution of 1080x2246. It is a video mode DSI panel.

+allOf:

• • $ref: panel-common.yaml#

+properties:

• compatible:
• items:

•  - enum:
  

•     - tianma,fhd-video
  

•  - const: novatek,nt36672a
  

• description: This indicates the panel manufacturer of the panel that is

•  in turn using the NT36672A panel driver. This compatible string
  

•  determines how the NT36672A panel driver is configured for the indicated
  

•  panel. The novatek,nt36672a compatible shall always be provided as a fallback.
  

• reset-gpios:
• description: phandle of gpio for reset line - This should be 8mA, gpio

•  can be configured using mux, pinctrl, pinctrl-names (active high)
  

• vddio-supply:
• description: phandle of the regulator that provides the supply voltage

•  Power IC supply
  

• vddpos-supply:
• description: phandle of the positive boost supply regulator
• vddneg-supply:
• description: phandle of the negative boost supply regulator
• reg: true
• port: true

+required:

• • compatible
• • reg
• • vddi0-supply
• • vddpos-supply
• • vddneg-supply
• • reset-gpios
• • port

+unevaluatedProperties: false

+examples:

• • |+
• #include <dt-bindings/gpio/gpio.h>
• dsi0 {

•    #address-cells = <1>;
  

•    #size-cells = <0>;
  

•    panel@0 {
  

•        compatible = "tianma,fhd-video", "novatek,nt36672a";
  

•        reg = <0>;
  

•        vddi0-supply = <&vreg_l14a_1p88>;
  

•        vddpos-supply = <&lab>;
  

•        vddneg-supply = <&ibb>;
  

•        reset-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>;
  

•        #address-cells = <1>;
  

•        #size-cells = <0>;
  

•        port {
  

•            tianma_nt36672a_in_0: endpoint {
  

•                remote-endpoint = <&dsi0_out>;
  

•            };
  

•        };
  

•    };
  

• };

+...

2.28.0

---

dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

On Wed 02 Sep 01:44 CDT 2020, Sumit Semwal wrote:

Novatek NT36672a is a generic DSI IC that drives command and video mode panels. Add the driver for it.

Right now adding support for some Poco F1 phones that have an LCD panel from Tianma connected with this IC, with a resolution of 1080x2246 that operates in DSI video mode.

During testing, Benni Steini bennisteinir@gmail.com helped us fix the reset sequence timing (from 10ms to 20ms), to get the bootanimation to work on Android.

With current AOSP, we need to increase it to 200ms - this seems to be a safe high value to avoid a white screen occasionally.

Signed-off-by: Sumit Semwal sumit.semwal@linaro.org Cc: Benni Steini bennisteinir@gmail.com

Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org

Regards, Bjorn

---

v2: increase reset sequence timing to a safe 200ms v4: Since "0425662fdf05: drm: Nuke mode->vrefresh", we have to calculate vrefresh on demand. Update for it. v5: Fixed review comments from Sam: - rebased on top of drm-misc-next remove return of drm_panel_add() remove drm_panel_detach() - renamed the panel driver file to reflect that this is a novatek nt36672a display driver and not only for tianma panels. Adjusted some internal names also to reflect the same. - corrected changelog to add info about the generic Novatek DSI IC - corrected compatible string accordingly - removed pinctrl - used drm_panel* API for prepare/unprepare/disable/remove v6: Fixed few review comments on v5 from Sam: - add dev_err_probe() support - move DRM_* error printing to dev_err() - removed a few unnecessary bits v7: Fixed review comments on v6 from Bjorn: - Reworked the send_mipi_commands functionality - removed regulator disable_loads; moved active_load setting to probe time - made function names and struct less generic - updated the reset_gpio working to active_low - update MAINTAINERS for file name changes

---

MAINTAINERS | 7 + drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + .../gpu/drm/panel/panel-novatek-nt36672a.c | 711 ++++++++++++++++++ 4 files changed, 729 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-novatek-nt36672a.c

diff --git a/MAINTAINERS b/MAINTAINERS index 01fb9ee6b951..c6fb966c0959 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5517,6 +5517,13 @@ T: git git://anongit.freedesktop.org/drm/drm-misc F: Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml F: drivers/gpu/drm/panel/panel-novatek-nt35510.c

+DRM DRIVER FOR NOVATEK NT36672A PANELS +M: Sumit Semwal sumit.semwal@linaro.org +S: Maintained +T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml +F: drivers/gpu/drm/panel/panel-novatek-nt36672a.c

DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS M: Ben Skeggs bskeggs@redhat.com L: dri-devel@lists.freedesktop.org diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 8d97d07c5871..51e6cb6c7826 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -208,6 +208,16 @@ config DRM_PANEL_NOVATEK_NT35510 around the Novatek NT35510 display controller, such as some Hydis panels.

+config DRM_PANEL_NOVATEK_NT36672A

• tristate "Novatek NT36672A DSI panel"
• depends on OF
• depends on DRM_MIPI_DSI
• depends on BACKLIGHT_CLASS_DEVICE
• help

•  Say Y here if you want to enable support for the panels built
  

•  around the Novatek NT36672A display controller, such as some
  

•  Tianma panels used in a few Xiaomi Poco F1 mobile phones.
  

config DRM_PANEL_NOVATEK_NT39016 tristate "Novatek NT39016 RGB/SPI panel" depends on OF && SPI diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 15a4e7752951..4a36eb45f670 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35510) += panel-novatek-nt35510.o +obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36672A) += panel-novatek-nt36672a.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT39016) += panel-novatek-nt39016.o obj-$(CONFIG_DRM_PANEL_MANTIX_MLAF057WE51) += panel-mantix-mlaf057we51.o obj-$(CONFIG_DRM_PANEL_OLIMEX_LCD_OLINUXINO) += panel-olimex-lcd-olinuxino.o diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c new file mode 100644 index 000000000000..533cd3934b8b --- /dev/null +++ b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c @@ -0,0 +1,711 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*

• • Copyright (C) 2020 Linaro Ltd
• • Author: Sumit Semwal sumit.semwal@linaro.org
• • This driver is for the DSI interface to panels using the NT36672A display driver IC
• • from Novatek.
• • Currently supported are the Tianma FHD+ panels found in some Xiaomi phones, including
• • some variants of the Poco F1 phone.
• • Panels using the Novatek NT37762A IC should add appropriate configuration per-panel and
• • use this driver.
• */

+#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h>

+#include <linux/gpio/consumer.h> +#include <linux/pinctrl/consumer.h> +#include <linux/regulator/consumer.h>

+#include <drm/drm_device.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h>

+#include <video/mipi_display.h>

+struct nt36672a_panel_cmd {

• const char data[2];

+};

+static const char * const nt36672a_regulator_names[] = {

• "vddio",
• "vddpos",
• "vddneg",

+};

+static unsigned long const nt36672a_regulator_enable_loads[] = {

• 62000,
• 100000,
• 100000

+};

+struct nt36672a_panel_desc {

• const struct drm_display_mode *display_mode;
• const char *panel_name;
• unsigned int width_mm;
• unsigned int height_mm;
• unsigned long mode_flags;
• enum mipi_dsi_pixel_format format;
• unsigned int lanes;
• unsigned int num_on_cmds_1;
• const struct nt36672a_panel_cmd *on_cmds_1;
• unsigned int num_on_cmds_2;
• const struct nt36672a_panel_cmd *on_cmds_2;
• unsigned int num_off_cmds;
• const struct nt36672a_panel_cmd *off_cmds;

+};

+struct nt36672a_panel {

• struct drm_panel base;
• struct mipi_dsi_device *link;
• const struct nt36672a_panel_desc *desc;
• struct regulator_bulk_data supplies[ARRAY_SIZE(nt36672a_regulator_names)];
• struct gpio_desc *reset_gpio;
• bool prepared;

+};

+static inline struct nt36672a_panel *to_nt36672a_panel(struct drm_panel *panel) +{

• return container_of(panel, struct nt36672a_panel, base);

+}

+static int nt36672a_send_cmds(struct drm_panel *panel, const struct nt36672a_panel_cmd *cmds,

• 	      int num)
  

+{

• struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
• unsigned int i;
• int err;
• for (i = 0; i < num; i++) {

• const struct nt36672a_panel_cmd *cmd = &cmds[i];
  

• err = mipi_dsi_dcs_write(pinfo->link, cmd->data[0], cmd->data + 1, 1);
  

• if (err < 0)
  

• 	return err;
  

• }
• return 0;

+}

+static int nt36672a_panel_power_off(struct drm_panel *panel) +{

• struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
• int ret = 0;
• gpiod_set_value(pinfo->reset_gpio, 1);
• ret = regulator_bulk_disable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies);
• if (ret)

• dev_err(panel->dev, "regulator_bulk_disable failed %d\n", ret);
  

• return ret;

+}

+static int nt36672a_panel_unprepare(struct drm_panel *panel) +{

• struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
• int ret;
• if (!pinfo->prepared)

• return 0;
  

• /* send off cmds */
• ret = nt36672a_send_cmds(panel, pinfo->desc->off_cmds,

• 		 pinfo->desc->num_off_cmds);
  

• if (ret < 0)

• dev_err(panel->dev, "failed to send DCS off cmds: %d\n", ret);
  

• ret = mipi_dsi_dcs_set_display_off(pinfo->link);
• if (ret < 0)

• dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret);
  

• /* 120ms delay required here as per DCS spec */
• msleep(120);
• ret = mipi_dsi_dcs_enter_sleep_mode(pinfo->link);
• if (ret < 0)

• dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret);
  

• /* 0x3C = 60ms delay */
• msleep(60);
• ret = nt36672a_panel_power_off(panel);
• if (ret < 0)

• dev_err(panel->dev, "power_off failed ret = %d\n", ret);
  

• pinfo->prepared = false;
• return ret;

+}

+static int nt36672a_panel_power_on(struct nt36672a_panel *pinfo) +{

• int ret;
• ret = regulator_bulk_enable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies);
• if (ret < 0)

• return ret;
  

• /*

• * As per downstream kernel, Reset sequence of Tianma FHD panel requires the panel to
  

• * be out of reset for 10ms, followed by being held in reset for 10ms. But for Android
  

• * AOSP, we needed to bump it upto 200ms otherwise we get white screen sometimes.
  

• * FIXME: Try to reduce this 200ms to a lesser value.
  

• */
  

• gpiod_set_value(pinfo->reset_gpio, 1);
• msleep(200);
• gpiod_set_value(pinfo->reset_gpio, 0);
• msleep(200);
• return 0;

+}

+static int nt36672a_panel_prepare(struct drm_panel *panel) +{

• struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
• int err;
• if (pinfo->prepared)

• return 0;
  

• err = nt36672a_panel_power_on(pinfo);
• if (err < 0)

• goto poweroff;
  

• /* send first part of init cmds */
• err = nt36672a_send_cmds(panel, pinfo->desc->on_cmds_1,

• 		 pinfo->desc->num_on_cmds_1);
  

• if (err < 0) {

• dev_err(panel->dev, "failed to send DCS Init 1st Code: %d\n", err);
  

• goto poweroff;
  

• }
• err = mipi_dsi_dcs_exit_sleep_mode(pinfo->link);
• if (err < 0) {

• dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
  

• goto poweroff;
  

• }
• /* 0x46 = 70 ms delay */
• msleep(70);
• err = mipi_dsi_dcs_set_display_on(pinfo->link);
• if (err < 0) {

• dev_err(panel->dev, "failed to Set Display ON: %d\n", err);
  

• goto poweroff;
  

• }
• /* Send rest of the init cmds */
• err = nt36672a_send_cmds(panel, pinfo->desc->on_cmds_2,

• 		 pinfo->desc->num_on_cmds_2);
  

• if (err < 0) {

• dev_err(panel->dev, "failed to send DCS Init 2nd Code: %d\n", err);
  

• goto poweroff;
  

• }
• msleep(120);
• pinfo->prepared = true;
• return 0;

+poweroff:

• gpiod_set_value(pinfo->reset_gpio, 0);
• return err;

+}

+static int nt36672a_panel_get_modes(struct drm_panel *panel,

• 		    struct drm_connector *connector)
  

+{

• struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
• const struct drm_display_mode *m = pinfo->desc->display_mode;
• struct drm_display_mode *mode;
• mode = drm_mode_duplicate(connector->dev, m);
• if (!mode) {

• dev_err(panel->dev, "failed to add mode %ux%u@%u\n", m->hdisplay,
  

• 	m->vdisplay, drm_mode_vrefresh(m));
  

• return -ENOMEM;
  

• }
• connector->display_info.width_mm = pinfo->desc->width_mm;
• connector->display_info.height_mm = pinfo->desc->height_mm;
• drm_mode_set_name(mode);
• drm_mode_probed_add(connector, mode);
• return 1;

+}

+static const struct drm_panel_funcs panel_funcs = {

• .unprepare = nt36672a_panel_unprepare,
• .prepare = nt36672a_panel_prepare,
• .get_modes = nt36672a_panel_get_modes,

+};

+static const struct nt36672a_panel_cmd tianma_fhd_video_on_cmds_1[] = {

• /* skin enhancement mode */
• { .data = {0xFF, 0x22} },
• { .data = {0x00, 0x40} },
• { .data = {0x01, 0xC0} },
• { .data = {0x02, 0x40} },
• { .data = {0x03, 0x40} },
• { .data = {0x04, 0x40} },
• { .data = {0x05, 0x40} },
• { .data = {0x06, 0x40} },
• { .data = {0x07, 0x40} },
• { .data = {0x08, 0x40} },
• { .data = {0x09, 0x40} },
• { .data = {0x0A, 0x40} },
• { .data = {0x0B, 0x40} },
• { .data = {0x0C, 0x40} },
• { .data = {0x0D, 0x40} },
• { .data = {0x0E, 0x40} },
• { .data = {0x0F, 0x40} },
• { .data = {0x10, 0x40} },
• { .data = {0x11, 0x50} },
• { .data = {0x12, 0x60} },
• { .data = {0x13, 0x70} },
• { .data = {0x14, 0x58} },
• { .data = {0x15, 0x68} },
• { .data = {0x16, 0x78} },
• { .data = {0x17, 0x77} },
• { .data = {0x18, 0x39} },
• { .data = {0x19, 0x2D} },
• { .data = {0x1A, 0x2E} },
• { .data = {0x1B, 0x32} },
• { .data = {0x1C, 0x37} },
• { .data = {0x1D, 0x3A} },
• { .data = {0x1E, 0x40} },
• { .data = {0x1F, 0x40} },
• { .data = {0x20, 0x40} },
• { .data = {0x21, 0x40} },
• { .data = {0x22, 0x40} },
• { .data = {0x23, 0x40} },
• { .data = {0x24, 0x40} },
• { .data = {0x25, 0x40} },
• { .data = {0x26, 0x40} },
• { .data = {0x27, 0x40} },
• { .data = {0x28, 0x40} },
• { .data = {0x2D, 0x00} },
• { .data = {0x2F, 0x40} },
• { .data = {0x30, 0x40} },
• { .data = {0x31, 0x40} },
• { .data = {0x32, 0x40} },
• { .data = {0x33, 0x40} },
• { .data = {0x34, 0x40} },
• { .data = {0x35, 0x40} },
• { .data = {0x36, 0x40} },
• { .data = {0x37, 0x40} },
• { .data = {0x38, 0x40} },
• { .data = {0x39, 0x40} },
• { .data = {0x3A, 0x40} },
• { .data = {0x3B, 0x40} },
• { .data = {0x3D, 0x40} },
• { .data = {0x3F, 0x40} },
• { .data = {0x40, 0x40} },
• { .data = {0x41, 0x40} },
• { .data = {0x42, 0x40} },
• { .data = {0x43, 0x40} },
• { .data = {0x44, 0x40} },
• { .data = {0x45, 0x40} },
• { .data = {0x46, 0x40} },
• { .data = {0x47, 0x40} },
• { .data = {0x48, 0x40} },
• { .data = {0x49, 0x40} },
• { .data = {0x4A, 0x40} },
• { .data = {0x4B, 0x40} },
• { .data = {0x4C, 0x40} },
• { .data = {0x4D, 0x40} },
• { .data = {0x4E, 0x40} },
• { .data = {0x4F, 0x40} },
• { .data = {0x50, 0x40} },
• { .data = {0x51, 0x40} },
• { .data = {0x52, 0x40} },
• { .data = {0x53, 0x01} },
• { .data = {0x54, 0x01} },
• { .data = {0x55, 0xFE} },
• { .data = {0x56, 0x77} },
• { .data = {0x58, 0xCD} },
• { .data = {0x59, 0xD0} },
• { .data = {0x5A, 0xD0} },
• { .data = {0x5B, 0x50} },
• { .data = {0x5C, 0x50} },
• { .data = {0x5D, 0x50} },
• { .data = {0x5E, 0x50} },
• { .data = {0x5F, 0x50} },
• { .data = {0x60, 0x50} },
• { .data = {0x61, 0x50} },
• { .data = {0x62, 0x50} },
• { .data = {0x63, 0x50} },
• { .data = {0x64, 0x50} },
• { .data = {0x65, 0x50} },
• { .data = {0x66, 0x50} },
• { .data = {0x67, 0x50} },
• { .data = {0x68, 0x50} },
• { .data = {0x69, 0x50} },
• { .data = {0x6A, 0x50} },
• { .data = {0x6B, 0x50} },
• { .data = {0x6C, 0x50} },
• { .data = {0x6D, 0x50} },
• { .data = {0x6E, 0x50} },
• { .data = {0x6F, 0x50} },
• { .data = {0x70, 0x07} },
• { .data = {0x71, 0x00} },
• { .data = {0x72, 0x00} },
• { .data = {0x73, 0x00} },
• { .data = {0x74, 0x06} },
• { .data = {0x75, 0x0C} },
• { .data = {0x76, 0x03} },
• { .data = {0x77, 0x09} },
• { .data = {0x78, 0x0F} },
• { .data = {0x79, 0x68} },
• { .data = {0x7A, 0x88} },
• { .data = {0x7C, 0x80} },
• { .data = {0x7D, 0x80} },
• { .data = {0x7E, 0x80} },
• { .data = {0x7F, 0x00} },
• { .data = {0x80, 0x00} },
• { .data = {0x81, 0x00} },
• { .data = {0x83, 0x01} },
• { .data = {0x84, 0x00} },
• { .data = {0x85, 0x80} },
• { .data = {0x86, 0x80} },
• { .data = {0x87, 0x80} },
• { .data = {0x88, 0x40} },
• { .data = {0x89, 0x91} },
• { .data = {0x8A, 0x98} },
• { .data = {0x8B, 0x80} },
• { .data = {0x8C, 0x80} },
• { .data = {0x8D, 0x80} },
• { .data = {0x8E, 0x80} },
• { .data = {0x8F, 0x80} },
• { .data = {0x90, 0x80} },
• { .data = {0x91, 0x80} },
• { .data = {0x92, 0x80} },
• { .data = {0x93, 0x80} },
• { .data = {0x94, 0x80} },
• { .data = {0x95, 0x80} },
• { .data = {0x96, 0x80} },
• { .data = {0x97, 0x80} },
• { .data = {0x98, 0x80} },
• { .data = {0x99, 0x80} },
• { .data = {0x9A, 0x80} },
• { .data = {0x9B, 0x80} },
• { .data = {0x9C, 0x80} },
• { .data = {0x9D, 0x80} },
• { .data = {0x9E, 0x80} },
• { .data = {0x9F, 0x80} },
• { .data = {0xA0, 0x8A} },
• { .data = {0xA2, 0x80} },
• { .data = {0xA6, 0x80} },
• { .data = {0xA7, 0x80} },
• { .data = {0xA9, 0x80} },
• { .data = {0xAA, 0x80} },
• { .data = {0xAB, 0x80} },
• { .data = {0xAC, 0x80} },
• { .data = {0xAD, 0x80} },
• { .data = {0xAE, 0x80} },
• { .data = {0xAF, 0x80} },
• { .data = {0xB7, 0x76} },
• { .data = {0xB8, 0x76} },
• { .data = {0xB9, 0x05} },
• { .data = {0xBA, 0x0D} },
• { .data = {0xBB, 0x14} },
• { .data = {0xBC, 0x0F} },
• { .data = {0xBD, 0x18} },
• { .data = {0xBE, 0x1F} },
• { .data = {0xBF, 0x05} },
• { .data = {0xC0, 0x0D} },
• { .data = {0xC1, 0x14} },
• { .data = {0xC2, 0x03} },
• { .data = {0xC3, 0x07} },
• { .data = {0xC4, 0x0A} },
• { .data = {0xC5, 0xA0} },
• { .data = {0xC6, 0x55} },
• { .data = {0xC7, 0xFF} },
• { .data = {0xC8, 0x39} },
• { .data = {0xC9, 0x44} },
• { .data = {0xCA, 0x12} },
• { .data = {0xCD, 0x80} },
• { .data = {0xDB, 0x80} },
• { .data = {0xDC, 0x80} },
• { .data = {0xDD, 0x80} },
• { .data = {0xE0, 0x80} },
• { .data = {0xE1, 0x80} },
• { .data = {0xE2, 0x80} },
• { .data = {0xE3, 0x80} },
• { .data = {0xE4, 0x80} },
• { .data = {0xE5, 0x40} },
• { .data = {0xE6, 0x40} },
• { .data = {0xE7, 0x40} },
• { .data = {0xE8, 0x40} },
• { .data = {0xE9, 0x40} },
• { .data = {0xEA, 0x40} },
• { .data = {0xEB, 0x40} },
• { .data = {0xEC, 0x40} },
• { .data = {0xED, 0x40} },
• { .data = {0xEE, 0x40} },
• { .data = {0xEF, 0x40} },
• { .data = {0xF0, 0x40} },
• { .data = {0xF1, 0x40} },
• { .data = {0xF2, 0x40} },
• { .data = {0xF3, 0x40} },
• { .data = {0xF4, 0x40} },
• { .data = {0xF5, 0x40} },
• { .data = {0xF6, 0x40} },
• { .data = {0xFB, 0x1} },
• { .data = {0xFF, 0x23} },
• { .data = {0xFB, 0x01} },
• /* dimming enable */
• { .data = {0x01, 0x84} },
• { .data = {0x05, 0x2D} },
• { .data = {0x06, 0x00} },

• /* resolution 1080*2246 */
  

• { .data = {0x11, 0x01} },
• { .data = {0x12, 0x7B} },
• { .data = {0x15, 0x6F} },
• { .data = {0x16, 0x0B} },

• /* UI mode */
  

• { .data = {0x29, 0x0A} },
• { .data = {0x30, 0xFF} },
• { .data = {0x31, 0xFF} },
• { .data = {0x32, 0xFF} },
• { .data = {0x33, 0xFF} },
• { .data = {0x34, 0xFF} },
• { .data = {0x35, 0xFF} },
• { .data = {0x36, 0xFF} },
• { .data = {0x37, 0xFF} },
• { .data = {0x38, 0xFC} },
• { .data = {0x39, 0xF8} },
• { .data = {0x3A, 0xF4} },
• { .data = {0x3B, 0xF1} },
• { .data = {0x3D, 0xEE} },
• { .data = {0x3F, 0xEB} },
• { .data = {0x40, 0xE8} },
• { .data = {0x41, 0xE5} },

• /* STILL mode */
  

• { .data = {0x2A, 0x13} },
• { .data = {0x45, 0xFF} },
• { .data = {0x46, 0xFF} },
• { .data = {0x47, 0xFF} },
• { .data = {0x48, 0xFF} },
• { .data = {0x49, 0xFF} },
• { .data = {0x4A, 0xFF} },
• { .data = {0x4B, 0xFF} },
• { .data = {0x4C, 0xFF} },
• { .data = {0x4D, 0xED} },
• { .data = {0x4E, 0xD5} },
• { .data = {0x4F, 0xBF} },
• { .data = {0x50, 0xA6} },
• { .data = {0x51, 0x96} },
• { .data = {0x52, 0x86} },
• { .data = {0x53, 0x76} },
• { .data = {0x54, 0x66} },

• /* MOVING mode */
  

• { .data = {0x2B, 0x0E} },
• { .data = {0x58, 0xFF} },
• { .data = {0x59, 0xFF} },
• { .data = {0x5A, 0xFF} },
• { .data = {0x5B, 0xFF} },
• { .data = {0x5C, 0xFF} },
• { .data = {0x5D, 0xFF} },
• { .data = {0x5E, 0xFF} },
• { .data = {0x5F, 0xFF} },
• { .data = {0x60, 0xF6} },
• { .data = {0x61, 0xEA} },
• { .data = {0x62, 0xE1} },
• { .data = {0x63, 0xD8} },
• { .data = {0x64, 0xCE} },
• { .data = {0x65, 0xC3} },
• { .data = {0x66, 0xBA} },
• { .data = {0x67, 0xB3} },
• { .data = {0xFF, 0x25} },
• { .data = {0xFB, 0x01} },
• { .data = {0x05, 0x04} },
• { .data = {0xFF, 0x26} },
• { .data = {0xFB, 0x01} },
• { .data = {0x1C, 0xAF} },
• { .data = {0xFF, 0x10} },
• { .data = {0xFB, 0x01} },
• { .data = {0x51, 0xFF} },
• { .data = {0x53, 0x24} },
• { .data = {0x55, 0x00} },

+};

+static const struct nt36672a_panel_cmd tianma_fhd_video_on_cmds_2[] = {

• { .data = {0xFF, 0x24} },
• { .data = {0xFB, 0x01} },
• { .data = {0xC3, 0x01} },
• { .data = {0xC4, 0x54} },
• { .data = {0xFF, 0x10} },

+};

+static const struct nt36672a_panel_cmd tianma_fhd_video_off_cmds[] = {

• { .data = {0xFF, 0x24} },
• { .data = {0xFB, 0x01} },
• { .data = {0xC3, 0x01} },
• { .data = {0xFF, 0x10} },

+};

+static const struct drm_display_mode tianma_fhd_video_panel_default_mode = {

• .clock = 161331,
• .hdisplay = 1080,
• .hsync_start = 1080 + 40,
• .hsync_end = 1080 + 40 + 20,
• .htotal = 1080 + 40 + 20 + 44,
• .vdisplay = 2246,
• .vsync_start = 2246 + 15,
• .vsync_end = 2246 + 15 + 2,
• .vtotal = 2246 + 15 + 2 + 8,
• .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,

+};

+static const struct nt36672a_panel_desc tianma_fhd_video_panel_desc = {

• .display_mode = &tianma_fhd_video_panel_default_mode,
• .width_mm = 68,
• .height_mm = 136,
• .mode_flags = MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO

• 	| MIPI_DSI_MODE_VIDEO_HSE
  

• 	| MIPI_DSI_CLOCK_NON_CONTINUOUS
  

• 	| MIPI_DSI_MODE_VIDEO_BURST,
  

• .format = MIPI_DSI_FMT_RGB888,
• .lanes = 4,
• .on_cmds_1 = tianma_fhd_video_on_cmds_1,
• .num_on_cmds_1 = ARRAY_SIZE(tianma_fhd_video_on_cmds_1),
• .on_cmds_2 = tianma_fhd_video_on_cmds_2,
• .num_on_cmds_2 = ARRAY_SIZE(tianma_fhd_video_on_cmds_2),
• .off_cmds = tianma_fhd_video_off_cmds,
• .num_off_cmds = ARRAY_SIZE(tianma_fhd_video_off_cmds),

+};

+static int nt36672a_panel_add(struct nt36672a_panel *pinfo) +{

• struct device *dev = &pinfo->link->dev;
• int i, ret;
• for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++)

• pinfo->supplies[i].supply = nt36672a_regulator_names[i];
  

• ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pinfo->supplies),

• 		      pinfo->supplies);
  

• if (ret < 0)

• return dev_err_probe(dev, ret, "failed to get regulators\n");
  

• for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) {

• ret = regulator_set_load(pinfo->supplies[i].consumer,
  

• 			 nt36672a_regulator_enable_loads[i]);
  

• if (ret)
  

• 	return  dev_err_probe(dev, ret, "failed to set regulator enable loads\n");
  

• }
• pinfo->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
• if (IS_ERR(pinfo->reset_gpio))

• return dev_err_probe(dev, PTR_ERR(pinfo->reset_gpio),
  

• 		     "failed to get reset gpio from DT\n");
  

• drm_panel_init(&pinfo->base, dev, &panel_funcs, DRM_MODE_CONNECTOR_DSI);
• drm_panel_add(&pinfo->base);
• return 0;

+}

+static int nt36672a_panel_probe(struct mipi_dsi_device *dsi) +{

• struct nt36672a_panel *pinfo;
• const struct nt36672a_panel_desc *desc;
• int err;
• pinfo = devm_kzalloc(&dsi->dev, sizeof(*pinfo), GFP_KERNEL);
• if (!pinfo)

• return -ENOMEM;
  

• desc = of_device_get_match_data(&dsi->dev);
• dsi->mode_flags = desc->mode_flags;
• dsi->format = desc->format;
• dsi->lanes = desc->lanes;
• pinfo->desc = desc;
• pinfo->link = dsi;
• mipi_dsi_set_drvdata(dsi, pinfo);
• err = nt36672a_panel_add(pinfo);
• if (err < 0)

• return err;
  

• return mipi_dsi_attach(dsi);

+}

+static int nt36672a_panel_remove(struct mipi_dsi_device *dsi) +{

• struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi);
• int err;
• err = drm_panel_unprepare(&pinfo->base);
• if (err < 0)

• dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
  

• err = drm_panel_disable(&pinfo->base);
• if (err < 0)

• dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
  

• err = mipi_dsi_detach(dsi);
• if (err < 0)

• dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
  

• drm_panel_remove(&pinfo->base);
• return 0;

+}

+static void nt36672a_panel_shutdown(struct mipi_dsi_device *dsi) +{

• struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi);
• drm_panel_disable(&pinfo->base);
• drm_panel_unprepare(&pinfo->base);

+}

+static const struct of_device_id tianma_fhd_video_of_match[] = {

• { .compatible = "tianma,fhd-video", .data = &tianma_fhd_video_panel_desc },
• { },

+}; +MODULE_DEVICE_TABLE(of, tianma_fhd_video_of_match);

+static struct mipi_dsi_driver nt36672a_panel_driver = {

• .driver = {

• .name = "panel-tianma-nt36672a",
  

• .of_match_table = tianma_fhd_video_of_match,
  

• },
• .probe = nt36672a_panel_probe,
• .remove = nt36672a_panel_remove,
• .shutdown = nt36672a_panel_shutdown,

+}; +module_mipi_dsi_driver(nt36672a_panel_driver);

+MODULE_AUTHOR("Sumit Semwal sumit.semwal@linaro.org"); +MODULE_DESCRIPTION("NOVATEK NT36672A based MIPI-DSI LCD panel driver");

+MODULE_LICENSE("GPL");

2.28.0