[PATCH v2 0/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[PATCH v2 0/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Guido Günther]

The panel uses a Focaltech FT8006p, the touch part is handled by the already
existing edt-ft5x06. It can be found in e.g. the Librem 5.

Changes from v1:
- Due to review comments by Sam Ravnborg, thanks!
  https://lore.kernel.org/dri-devel/20200815083917.GA993113@ravnborg.org/
  - Don't preserve newlines with '|' in description
  - Use reset-gpios and backlight from panel-common.yaml
  - Reindent example
  https://lore.kernel.org/dri-devel/20200815093226.GB993113@ravnborg.org/
  - Drop unused includes
  - Use dev_* instead of DRM_* for printing
  - Turn off regulators in reverse order from enable
  - Silence errors in mantix_{shutdown,remove}
  - Drop duplicate mipi_dsi_dcs_enter_sleep_mode()
  https://lore.kernel.org/dri-devel/20200815100230.GA1002374@ravnborg.org/
  - Use dev_err_probe()
- Add delays when turning off panel as suggested by the data sheet

This series is against next-20200814.

Guido Günther (3):
  dt-bindings: vendor-prefixes: Add mantix vendor prefix
  dt-bindings: Add Mantix MLAF057WE51-X panel bindings
  drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

 .../display/panel/mantix,mlaf057we51-x.yaml   |  70 ++++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   7 +
 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-mantix-mlaf057we51.c  | 328 ++++++++++++++++++
 6 files changed, 419 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
 create mode 100644 drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c

-- 
2.26.2

[PATCH v2 1/3] dt-bindings: vendor-prefixes: Add mantix vendor prefix

[Guido Günther]

Add prefix for Mantix Display Technology Co.,Ltd.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 2baee2c817c1a..59d4c8b068c4d 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -611,6 +611,8 @@ patternProperties:
     description: Linux Automation GmbH
   "^macnica,.*":
     description: Macnica Americas
+  "^mantix,.*":
+    description: Mantix Display Technology Co.,Ltd.
   "^mapleboard,.*":
     description: Mapleboard.org
   "^marvell,.*":
-- 
2.26.2

Re: [PATCH v2 1/3] dt-bindings: vendor-prefixes: Add mantix vendor prefix

[Sam Ravnborg]

On Sat, Aug 15, 2020 at 11:16:20PM +0200, Guido Günther wrote:
> Add prefix for Mantix Display Technology Co.,Ltd.
> 
> Signed-off-by: Guido Günther <agx@sigxcpu.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
> ---
>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 2baee2c817c1a..59d4c8b068c4d 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -611,6 +611,8 @@ patternProperties:
>      description: Linux Automation GmbH
>    "^macnica,.*":
>      description: Macnica Americas
> +  "^mantix,.*":
> +    description: Mantix Display Technology Co.,Ltd.
>    "^mapleboard,.*":
>      description: Mapleboard.org
>    "^marvell,.*":
> -- 
> 2.26.2

[PATCH v2 2/3] dt-bindings: Add Mantix MLAF057WE51-X panel bindings

[Guido Günther]

The panel uses a Focaltech FT8006p, the touch part is handled by the
already existing edt-ft5x06.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
 .../display/panel/mantix,mlaf057we51-x.yaml   | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml b/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
new file mode 100644
index 0000000000000..937323cc9aaac
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/mantix,mlaf057we51-x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mantix MLAF057WE51-X 5.7" 720x1440 TFT LCD panel
+
+maintainers:
+  - Guido Günther <agx@sigxcpu.org>
+
+description:
+  Mantix MLAF057WE51 X is a 720x1440 TFT LCD panel connected using
+  a MIPI-DSI video interface.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - mantix,mlaf057we51-x
+
+  port: true
+  reg:
+    maxItems: 1
+    description: DSI virtual channel
+
+  avdd-supply:
+    description: Positive analog power supply
+
+  avee-supply:
+    description: Negative analog power supply
+
+  vddi-supply:
+    description: 1.8V I/O voltage supply
+
+  reset-gpios: true
+
+  backlight: true
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+  - avee-supply
+  - vddi-supply
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "mantix,mlaf057we51-x";
+            reg = <0>;
+            avdd-supply = <&reg_avdd>;
+            avee-supply = <&reg_avee>;
+            vddi-supply = <&reg_1v8_p>;
+            reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
+            backlight = <&backlight>;
+        };
+    };
+
+...
-- 
2.26.2

Re: [PATCH v2 2/3] dt-bindings: Add Mantix MLAF057WE51-X panel bindings

[Sam Ravnborg]

On Sat, Aug 15, 2020 at 11:16:21PM +0200, Guido Günther wrote:
> The panel uses a Focaltech FT8006p, the touch part is handled by the
> already existing edt-ft5x06.
> 
> Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

I assume you will apply yourself, otherwise I will do so when we have
seen a backmerge.

	Sam

> ---
>  .../display/panel/mantix,mlaf057we51-x.yaml   | 70 +++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml b/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
> new file mode 100644
> index 0000000000000..937323cc9aaac
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/mantix,mlaf057we51-x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mantix MLAF057WE51-X 5.7" 720x1440 TFT LCD panel
> +
> +maintainers:
> +  - Guido Günther <agx@sigxcpu.org>
> +
> +description:
> +  Mantix MLAF057WE51 X is a 720x1440 TFT LCD panel connected using
> +  a MIPI-DSI video interface.
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mantix,mlaf057we51-x
> +
> +  port: true
> +  reg:
> +    maxItems: 1
> +    description: DSI virtual channel
> +
> +  avdd-supply:
> +    description: Positive analog power supply
> +
> +  avee-supply:
> +    description: Negative analog power supply
> +
> +  vddi-supply:
> +    description: 1.8V I/O voltage supply
> +
> +  reset-gpios: true
> +
> +  backlight: true
> +
> +required:
> +  - compatible
> +  - reg
> +  - avdd-supply
> +  - avee-supply
> +  - vddi-supply
> +  - reset-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    dsi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        panel@0 {
> +            compatible = "mantix,mlaf057we51-x";
> +            reg = <0>;
> +            avdd-supply = <&reg_avdd>;
> +            avee-supply = <&reg_avee>;
> +            vddi-supply = <&reg_1v8_p>;
> +            reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
> +            backlight = <&backlight>;
> +        };
> +    };
> +
> +...
> -- 
> 2.26.2

[PATCH v2 3/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Guido Günther]

The panel uses a Focaltech FT8006p, the touch part is handled by the
already existing edt-ft5x06.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
 MAINTAINERS                                   |   7 +
 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-mantix-mlaf057we51.c  | 328 ++++++++++++++++++
 4 files changed, 347 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 83ba7b62651f7..7dfe4cc3d4ec8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5474,6 +5474,13 @@ S:	Maintained
 F:	drivers/gpu/drm/panel/panel-lvds.c
 F:	Documentation/devicetree/bindings/display/panel/lvds.yaml
 
+DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
+M:	Guido Günther <agx@sigxcpu.org>
+R:	Purism Kernel Team <kernel@puri.sm>
+S:	Maintained
+F:	Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
+F:	drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
+
 DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
 S:	Orphan / Obsolete
 F:	drivers/gpu/drm/mga/
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index de2f2a452be55..8d97d07c58713 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -217,6 +217,17 @@ config DRM_PANEL_NOVATEK_NT39016
 	  Say Y here if you want to enable support for the panels built
 	  around the Novatek NT39016 display controller.
 
+config DRM_PANEL_MANTIX_MLAF057WE51
+	tristate "Mantix MLAF057WE51-X MIPI-DSI LCD 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 Mantix
+	  MLAF057WE51-X MIPI DSI panel as e.g. used in the Librem 5. It
+	  has a resolution of 720x1440 pixels, a built in backlight and touch
+	  controller.
+
 config DRM_PANEL_OLIMEX_LCD_OLINUXINO
 	tristate "Olimex LCD-OLinuXino panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index e45ceac6286fd..15a4e77529514 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -20,6 +20,7 @@ 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_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
 obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
 obj-$(CONFIG_DRM_PANEL_OSD_OSD101T2587_53TS) += panel-osd-osd101t2587-53ts.o
diff --git a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
new file mode 100644
index 0000000000000..cd5424d5bdb63
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mantix MLAF057WE51 5.7" MIPI-DSI panel driver
+ *
+ * Copyright (C) Purism SPC 2020
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+#define DRV_NAME "panel-mantix-mlaf057we51"
+
+/* Manufacturer specific Commands send via DSI */
+#define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
+#define MANTIX_CMD_INT_CANCEL           0x4C
+
+struct mantix {
+	struct device *dev;
+	struct drm_panel panel;
+	struct gpio_desc *reset_gpio;
+
+	struct regulator *avdd;
+	struct regulator *avee;
+	struct regulator *vddi;
+};
+
+static inline struct mantix *panel_to_mantix(struct drm_panel *panel)
+{
+	return container_of(panel, struct mantix, panel);
+}
+
+#define dsi_generic_write_seq(dsi, seq...) do {				\
+		static const u8 d[] = { seq };				\
+		int ret;						\
+		ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d));	\
+		if (ret < 0)						\
+			return ret;					\
+	} while (0)
+
+static int mantix_init_sequence(struct mantix *ctx)
+{
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+	struct device *dev = ctx->dev;
+
+	/*
+	 * Init sequence was supplied by the panel vendor.
+	 */
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A);
+
+	dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03);
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03);
+	dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00);
+
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09);
+	dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
+	msleep(20);
+
+	dev_dbg(dev, "Panel init sequence done\n");
+	return 0;
+}
+
+static int mantix_enable(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct device *dev = ctx->dev;
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
+	int ret;
+
+	ret = mantix_init_sequence(ctx);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to exit sleep mode\n");
+		return ret;
+	}
+	msleep(20);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret)
+		return ret;
+	usleep_range(10000, 12000);
+
+	ret = mipi_dsi_turn_on_peripheral(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to turn on peripheral\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mantix_disable(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+	int ret;
+
+	ret = mipi_dsi_dcs_set_display_off(dsi);
+	if (ret < 0)
+		dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);
+
+	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+	if (ret < 0)
+		dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
+
+
+	return 0;
+}
+
+static int mantix_unprepare(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+
+	regulator_disable(ctx->avee);
+	regulator_disable(ctx->avdd);
+	/* T11 */
+	usleep_range(5000, 6000);
+	regulator_disable(ctx->vddi);
+	/* T14 */
+	msleep(50);
+
+	return 0;
+}
+
+static int mantix_prepare(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	int ret;
+
+	/* Focaltech FT8006P, section 7.3.1 and 7.3.4 */
+	dev_dbg(ctx->dev, "Resetting the panel\n");
+	ret = regulator_enable(ctx->vddi);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret);
+		return ret;
+	}
+	/* T1 + T2 */
+	usleep_range(8000, 10000);
+
+	ret = regulator_enable(ctx->avdd);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret);
+		return ret;
+	}
+
+	/* T2d */
+	usleep_range(3500, 4000);
+	ret = regulator_enable(ctx->avee);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret);
+		return ret;
+	}
+
+	/* T3+T5 */
+	usleep_range(10000, 12000);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(5150, 7000);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+
+	/* T6 */
+	msleep(50);
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.hdisplay    = 720,
+	.hsync_start = 720 + 45,
+	.hsync_end   = 720 + 45 + 14,
+	.htotal	     = 720 + 45 + 14 + 25,
+	.vdisplay    = 1440,
+	.vsync_start = 1440 + 130,
+	.vsync_end   = 1440 + 130 + 8,
+	.vtotal	     = 1440 + 130 + 8 + 106,
+	.clock	     = 85298,
+	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	.width_mm    = 65,
+	.height_mm   = 130,
+};
+
+static int mantix_get_modes(struct drm_panel *panel,
+			    struct drm_connector *connector)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	connector->display_info.width_mm = mode->width_mm;
+	connector->display_info.height_mm = mode->height_mm;
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs mantix_drm_funcs = {
+	.disable   = mantix_disable,
+	.unprepare = mantix_unprepare,
+	.prepare   = mantix_prepare,
+	.enable	   = mantix_enable,
+	.get_modes = mantix_get_modes,
+};
+
+static int mantix_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct mantix *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio)) {
+		dev_err(dev, "cannot get reset gpio\n");
+		return PTR_ERR(ctx->reset_gpio);
+	}
+
+	mipi_dsi_set_drvdata(dsi, ctx);
+	ctx->dev = dev;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+		MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+
+	ctx->avdd = devm_regulator_get(dev, "avdd");
+	if (IS_ERR(ctx->avdd))
+		return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n");
+
+	ctx->avee = devm_regulator_get(dev, "avee");
+	if (IS_ERR(ctx->avee))
+		return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n");
+
+	ctx->vddi = devm_regulator_get(dev, "vddi");
+	if (IS_ERR(ctx->vddi))
+		return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n");
+
+	drm_panel_init(&ctx->panel, dev, &mantix_drm_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return ret;
+
+	drm_panel_add(&ctx->panel);
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
+		 default_mode.hdisplay, default_mode.vdisplay,
+		 drm_mode_vrefresh(&default_mode),
+		 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
+
+	return 0;
+}
+
+static void mantix_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_unprepare(&ctx->panel);
+	drm_panel_disable(&ctx->panel);
+}
+
+static int mantix_remove(struct mipi_dsi_device *dsi)
+{
+	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
+
+	mantix_shutdown(dsi);
+
+	mipi_dsi_detach(dsi);
+	drm_panel_remove(&ctx->panel);
+
+	return 0;
+}
+
+static const struct of_device_id mantix_of_match[] = {
+	{ .compatible = "mantix,mlaf057we51-x" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mantix_of_match);
+
+static struct mipi_dsi_driver mantix_driver = {
+	.probe	= mantix_probe,
+	.remove = mantix_remove,
+	.shutdown = mantix_shutdown,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = mantix_of_match,
+	},
+};
+module_mipi_dsi_driver(mantix_driver);
+
+MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
+MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel");
+MODULE_LICENSE("GPL v2");
-- 
2.26.2

Re: [PATCH v2 3/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Sam Ravnborg]

Hi Guido.

On Sat, Aug 15, 2020 at 11:16:22PM +0200, Guido Günther wrote:
> The panel uses a Focaltech FT8006p, the touch part is handled by the
> already existing edt-ft5x06.
> 
> Signed-off-by: Guido Günther <agx@sigxcpu.org>

Two small nits - otherwise looks good.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

I can fix while applying or you can send a new revision,
but I cannot apply until drm-misc-next have seen a backmerge
due to dev_err_probe() usage.

Did you have commit rights yet?
If yes, then please apply yourself.

	Sam

> ---
>  MAINTAINERS                                   |   7 +
>  drivers/gpu/drm/panel/Kconfig                 |  11 +
>  drivers/gpu/drm/panel/Makefile                |   1 +
>  .../gpu/drm/panel/panel-mantix-mlaf057we51.c  | 328 ++++++++++++++++++
>  4 files changed, 347 insertions(+)
>  create mode 100644 drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 83ba7b62651f7..7dfe4cc3d4ec8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5474,6 +5474,13 @@ S:	Maintained
>  F:	drivers/gpu/drm/panel/panel-lvds.c
>  F:	Documentation/devicetree/bindings/display/panel/lvds.yaml
>  
> +DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
> +M:	Guido Günther <agx@sigxcpu.org>
> +R:	Purism Kernel Team <kernel@puri.sm>
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
> +F:	drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> +
>  DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
>  S:	Orphan / Obsolete
>  F:	drivers/gpu/drm/mga/
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index de2f2a452be55..8d97d07c58713 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -217,6 +217,17 @@ config DRM_PANEL_NOVATEK_NT39016
>  	  Say Y here if you want to enable support for the panels built
>  	  around the Novatek NT39016 display controller.
>  
> +config DRM_PANEL_MANTIX_MLAF057WE51
> +	tristate "Mantix MLAF057WE51-X MIPI-DSI LCD 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 Mantix
> +	  MLAF057WE51-X MIPI DSI panel as e.g. used in the Librem 5. It
> +	  has a resolution of 720x1440 pixels, a built in backlight and touch
> +	  controller.
> +
>  config DRM_PANEL_OLIMEX_LCD_OLINUXINO
>  	tristate "Olimex LCD-OLinuXino panel"
>  	depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index e45ceac6286fd..15a4e77529514 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -20,6 +20,7 @@ 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_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
>  obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
>  obj-$(CONFIG_DRM_PANEL_OSD_OSD101T2587_53TS) += panel-osd-osd101t2587-53ts.o
> diff --git a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> new file mode 100644
> index 0000000000000..cd5424d5bdb63
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> @@ -0,0 +1,328 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Mantix MLAF057WE51 5.7" MIPI-DSI panel driver
> + *
> + * Copyright (C) Purism SPC 2020
> + */
> +
> +#include <linux/backlight.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/module.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <video/mipi_display.h>
> +
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_modes.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
drm_print.h is no longer used - drop.

> +
> +#define DRV_NAME "panel-mantix-mlaf057we51"
> +
> +/* Manufacturer specific Commands send via DSI */
> +#define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
> +#define MANTIX_CMD_INT_CANCEL           0x4C
> +
> +struct mantix {
> +	struct device *dev;
> +	struct drm_panel panel;
> +	struct gpio_desc *reset_gpio;
> +
> +	struct regulator *avdd;
> +	struct regulator *avee;
> +	struct regulator *vddi;
> +};
> +
> +static inline struct mantix *panel_to_mantix(struct drm_panel *panel)
> +{
> +	return container_of(panel, struct mantix, panel);
> +}
> +
> +#define dsi_generic_write_seq(dsi, seq...) do {				\
> +		static const u8 d[] = { seq };				\
> +		int ret;						\
> +		ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d));	\
> +		if (ret < 0)						\
> +			return ret;					\
> +	} while (0)
> +
> +static int mantix_init_sequence(struct mantix *ctx)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +	struct device *dev = ctx->dev;
> +
> +	/*
> +	 * Init sequence was supplied by the panel vendor.
> +	 */
> +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A);
> +
> +	dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03);
> +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03);
> +	dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00);
> +
> +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09);
> +	dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
> +	msleep(20);
> +
> +	dev_dbg(dev, "Panel init sequence done\n");
> +	return 0;
> +}
> +
> +static int mantix_enable(struct drm_panel *panel)
> +{
> +	struct mantix *ctx = panel_to_mantix(panel);
> +	struct device *dev = ctx->dev;
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
> +	int ret;
> +
> +	ret = mantix_init_sequence(ctx);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to exit sleep mode\n");
> +		return ret;
> +	}
> +	msleep(20);
> +
> +	ret = mipi_dsi_dcs_set_display_on(dsi);
> +	if (ret)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = mipi_dsi_turn_on_peripheral(dsi);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to turn on peripheral\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int mantix_disable(struct drm_panel *panel)
> +{
> +	struct mantix *ctx = panel_to_mantix(panel);
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +	int ret;
> +
> +	ret = mipi_dsi_dcs_set_display_off(dsi);
> +	if (ret < 0)
> +		dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);
> +
> +	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
> +	if (ret < 0)
> +		dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
> +
> +
> +	return 0;
> +}
> +
> +static int mantix_unprepare(struct drm_panel *panel)
> +{
> +	struct mantix *ctx = panel_to_mantix(panel);
> +
> +	regulator_disable(ctx->avee);
> +	regulator_disable(ctx->avdd);
> +	/* T11 */
> +	usleep_range(5000, 6000);
> +	regulator_disable(ctx->vddi);
> +	/* T14 */
> +	msleep(50);
> +
> +	return 0;
> +}
> +
> +static int mantix_prepare(struct drm_panel *panel)
> +{
> +	struct mantix *ctx = panel_to_mantix(panel);
> +	int ret;
> +
> +	/* Focaltech FT8006P, section 7.3.1 and 7.3.4 */
> +	dev_dbg(ctx->dev, "Resetting the panel\n");
> +	ret = regulator_enable(ctx->vddi);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret);
> +		return ret;
> +	}
Maybe add one empty line here
> +	/* T1 + T2 */
> +	usleep_range(8000, 10000);
> +
> +	ret = regulator_enable(ctx->avdd);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret);
> +		return ret;
> +	}
> +
> +	/* T2d */
> +	usleep_range(3500, 4000);
> +	ret = regulator_enable(ctx->avee);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret);
> +		return ret;
> +	}
> +
> +	/* T3+T5 */
> +	usleep_range(10000, 12000);
> +
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +	usleep_range(5150, 7000);
> +
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> +
> +	/* T6 */
> +	msleep(50);
> +
> +	return 0;
> +}
> +
> +static const struct drm_display_mode default_mode = {
> +	.hdisplay    = 720,
> +	.hsync_start = 720 + 45,
> +	.hsync_end   = 720 + 45 + 14,
> +	.htotal	     = 720 + 45 + 14 + 25,
> +	.vdisplay    = 1440,
> +	.vsync_start = 1440 + 130,
> +	.vsync_end   = 1440 + 130 + 8,
> +	.vtotal	     = 1440 + 130 + 8 + 106,
> +	.clock	     = 85298,
> +	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> +	.width_mm    = 65,
> +	.height_mm   = 130,
> +};
> +
> +static int mantix_get_modes(struct drm_panel *panel,
> +			    struct drm_connector *connector)
> +{
> +	struct mantix *ctx = panel_to_mantix(panel);
> +	struct drm_display_mode *mode;
> +
> +	mode = drm_mode_duplicate(connector->dev, &default_mode);
> +	if (!mode) {
> +		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
> +			default_mode.hdisplay, default_mode.vdisplay,
> +			drm_mode_vrefresh(mode));
> +		return -ENOMEM;
> +	}
> +
> +	drm_mode_set_name(mode);
> +
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	connector->display_info.width_mm = mode->width_mm;
> +	connector->display_info.height_mm = mode->height_mm;
> +	drm_mode_probed_add(connector, mode);
> +
> +	return 1;
> +}
> +
> +static const struct drm_panel_funcs mantix_drm_funcs = {
> +	.disable   = mantix_disable,
> +	.unprepare = mantix_unprepare,
> +	.prepare   = mantix_prepare,
> +	.enable	   = mantix_enable,
> +	.get_modes = mantix_get_modes,
> +};
> +
> +static int mantix_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct device *dev = &dsi->dev;
> +	struct mantix *ctx;
> +	int ret;
> +
> +	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> +	if (!ctx)
> +		return -ENOMEM;
> +
> +	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(ctx->reset_gpio)) {
> +		dev_err(dev, "cannot get reset gpio\n");
> +		return PTR_ERR(ctx->reset_gpio);
> +	}
> +
> +	mipi_dsi_set_drvdata(dsi, ctx);
> +	ctx->dev = dev;
> +
> +	dsi->lanes = 4;
> +	dsi->format = MIPI_DSI_FMT_RGB888;
> +	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> +		MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
> +
> +	ctx->avdd = devm_regulator_get(dev, "avdd");
> +	if (IS_ERR(ctx->avdd))
> +		return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n");
> +
> +	ctx->avee = devm_regulator_get(dev, "avee");
> +	if (IS_ERR(ctx->avee))
> +		return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n");
> +
> +	ctx->vddi = devm_regulator_get(dev, "vddi");
> +	if (IS_ERR(ctx->vddi))
> +		return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n");
> +
> +	drm_panel_init(&ctx->panel, dev, &mantix_drm_funcs,
> +		       DRM_MODE_CONNECTOR_DSI);
> +
> +	ret = drm_panel_of_backlight(&ctx->panel);
> +	if (ret)
> +		return ret;
> +
> +	drm_panel_add(&ctx->panel);
> +
> +	ret = mipi_dsi_attach(dsi);
> +	if (ret < 0) {
> +		dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
> +		drm_panel_remove(&ctx->panel);
> +		return ret;
> +	}
> +
> +	dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
> +		 default_mode.hdisplay, default_mode.vdisplay,
> +		 drm_mode_vrefresh(&default_mode),
> +		 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
> +
> +	return 0;
> +}
> +
> +static void mantix_shutdown(struct mipi_dsi_device *dsi)
> +{
> +	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
> +
> +	drm_panel_unprepare(&ctx->panel);
> +	drm_panel_disable(&ctx->panel);
> +}
> +
> +static int mantix_remove(struct mipi_dsi_device *dsi)
> +{
> +	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
> +
> +	mantix_shutdown(dsi);
> +
> +	mipi_dsi_detach(dsi);
> +	drm_panel_remove(&ctx->panel);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id mantix_of_match[] = {
> +	{ .compatible = "mantix,mlaf057we51-x" },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, mantix_of_match);
> +
> +static struct mipi_dsi_driver mantix_driver = {
> +	.probe	= mantix_probe,
> +	.remove = mantix_remove,
> +	.shutdown = mantix_shutdown,
> +	.driver = {
> +		.name = DRV_NAME,
> +		.of_match_table = mantix_of_match,
> +	},
> +};
> +module_mipi_dsi_driver(mantix_driver);
> +
> +MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
> +MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel");
> +MODULE_LICENSE("GPL v2");
> -- 
> 2.26.2

Re: [PATCH v2 3/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Guido Günther]

Hi Sam,
thanks for having a look!

On Sat, Aug 15, 2020 at 11:27:27PM +0200, Sam Ravnborg wrote:
> Hi Guido.
> 
> On Sat, Aug 15, 2020 at 11:16:22PM +0200, Guido Günther wrote:
> > The panel uses a Focaltech FT8006p, the touch part is handled by the
> > already existing edt-ft5x06.
> > 
> > Signed-off-by: Guido Günther <agx@sigxcpu.org>
> 
> Two small nits - otherwise looks good.
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> 
> I can fix while applying or you can send a new revision,
> but I cannot apply until drm-misc-next have seen a backmerge
> due to dev_err_probe() usage.

I'll send out a v3 with this fixed.

> Did you have commit rights yet?
> If yes, then please apply yourself.

No commit rights here. So it would be great if you could apply the
patches. Should I look for commit rights? I assume that means following

    https://drm.pages.freedesktop.org/maintainer-tools/commit-access.html#drm-misc    

Cheers,
 -- Guido

> 
> 	Sam
> 
> > ---
> >  MAINTAINERS                                   |   7 +
> >  drivers/gpu/drm/panel/Kconfig                 |  11 +
> >  drivers/gpu/drm/panel/Makefile                |   1 +
> >  .../gpu/drm/panel/panel-mantix-mlaf057we51.c  | 328 ++++++++++++++++++
> >  4 files changed, 347 insertions(+)
> >  create mode 100644 drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> > 
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 83ba7b62651f7..7dfe4cc3d4ec8 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -5474,6 +5474,13 @@ S:	Maintained
> >  F:	drivers/gpu/drm/panel/panel-lvds.c
> >  F:	Documentation/devicetree/bindings/display/panel/lvds.yaml
> >  
> > +DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
> > +M:	Guido Günther <agx@sigxcpu.org>
> > +R:	Purism Kernel Team <kernel@puri.sm>
> > +S:	Maintained
> > +F:	Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
> > +F:	drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> > +
> >  DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
> >  S:	Orphan / Obsolete
> >  F:	drivers/gpu/drm/mga/
> > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> > index de2f2a452be55..8d97d07c58713 100644
> > --- a/drivers/gpu/drm/panel/Kconfig
> > +++ b/drivers/gpu/drm/panel/Kconfig
> > @@ -217,6 +217,17 @@ config DRM_PANEL_NOVATEK_NT39016
> >  	  Say Y here if you want to enable support for the panels built
> >  	  around the Novatek NT39016 display controller.
> >  
> > +config DRM_PANEL_MANTIX_MLAF057WE51
> > +	tristate "Mantix MLAF057WE51-X MIPI-DSI LCD 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 Mantix
> > +	  MLAF057WE51-X MIPI DSI panel as e.g. used in the Librem 5. It
> > +	  has a resolution of 720x1440 pixels, a built in backlight and touch
> > +	  controller.
> > +
> >  config DRM_PANEL_OLIMEX_LCD_OLINUXINO
> >  	tristate "Olimex LCD-OLinuXino panel"
> >  	depends on OF
> > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> > index e45ceac6286fd..15a4e77529514 100644
> > --- a/drivers/gpu/drm/panel/Makefile
> > +++ b/drivers/gpu/drm/panel/Makefile
> > @@ -20,6 +20,7 @@ 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_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
> >  obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
> >  obj-$(CONFIG_DRM_PANEL_OSD_OSD101T2587_53TS) += panel-osd-osd101t2587-53ts.o
> > diff --git a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> > new file mode 100644
> > index 0000000000000..cd5424d5bdb63
> > --- /dev/null
> > +++ b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
> > @@ -0,0 +1,328 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Mantix MLAF057WE51 5.7" MIPI-DSI panel driver
> > + *
> > + * Copyright (C) Purism SPC 2020
> > + */
> > +
> > +#include <linux/backlight.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/module.h>
> > +#include <linux/regulator/consumer.h>
> > +
> > +#include <video/mipi_display.h>
> > +
> > +#include <drm/drm_mipi_dsi.h>
> > +#include <drm/drm_modes.h>
> > +#include <drm/drm_panel.h>
> > +#include <drm/drm_print.h>
> drm_print.h is no longer used - drop.
> 
> > +
> > +#define DRV_NAME "panel-mantix-mlaf057we51"
> > +
> > +/* Manufacturer specific Commands send via DSI */
> > +#define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
> > +#define MANTIX_CMD_INT_CANCEL           0x4C
> > +
> > +struct mantix {
> > +	struct device *dev;
> > +	struct drm_panel panel;
> > +	struct gpio_desc *reset_gpio;
> > +
> > +	struct regulator *avdd;
> > +	struct regulator *avee;
> > +	struct regulator *vddi;
> > +};
> > +
> > +static inline struct mantix *panel_to_mantix(struct drm_panel *panel)
> > +{
> > +	return container_of(panel, struct mantix, panel);
> > +}
> > +
> > +#define dsi_generic_write_seq(dsi, seq...) do {				\
> > +		static const u8 d[] = { seq };				\
> > +		int ret;						\
> > +		ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d));	\
> > +		if (ret < 0)						\
> > +			return ret;					\
> > +	} while (0)
> > +
> > +static int mantix_init_sequence(struct mantix *ctx)
> > +{
> > +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> > +	struct device *dev = ctx->dev;
> > +
> > +	/*
> > +	 * Init sequence was supplied by the panel vendor.
> > +	 */
> > +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A);
> > +
> > +	dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03);
> > +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03);
> > +	dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00);
> > +
> > +	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09);
> > +	dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
> > +	msleep(20);
> > +
> > +	dev_dbg(dev, "Panel init sequence done\n");
> > +	return 0;
> > +}
> > +
> > +static int mantix_enable(struct drm_panel *panel)
> > +{
> > +	struct mantix *ctx = panel_to_mantix(panel);
> > +	struct device *dev = ctx->dev;
> > +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
> > +	int ret;
> > +
> > +	ret = mantix_init_sequence(ctx);
> > +	if (ret < 0) {
> > +		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
> > +		return ret;
> > +	}
> > +
> > +	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> > +	if (ret < 0) {
> > +		dev_err(dev, "Failed to exit sleep mode\n");
> > +		return ret;
> > +	}
> > +	msleep(20);
> > +
> > +	ret = mipi_dsi_dcs_set_display_on(dsi);
> > +	if (ret)
> > +		return ret;
> > +	usleep_range(10000, 12000);
> > +
> > +	ret = mipi_dsi_turn_on_peripheral(dsi);
> > +	if (ret < 0) {
> > +		dev_err(dev, "Failed to turn on peripheral\n");
> > +		return ret;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int mantix_disable(struct drm_panel *panel)
> > +{
> > +	struct mantix *ctx = panel_to_mantix(panel);
> > +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> > +	int ret;
> > +
> > +	ret = mipi_dsi_dcs_set_display_off(dsi);
> > +	if (ret < 0)
> > +		dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);
> > +
> > +	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
> > +	if (ret < 0)
> > +		dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
> > +
> > +
> > +	return 0;
> > +}
> > +
> > +static int mantix_unprepare(struct drm_panel *panel)
> > +{
> > +	struct mantix *ctx = panel_to_mantix(panel);
> > +
> > +	regulator_disable(ctx->avee);
> > +	regulator_disable(ctx->avdd);
> > +	/* T11 */
> > +	usleep_range(5000, 6000);
> > +	regulator_disable(ctx->vddi);
> > +	/* T14 */
> > +	msleep(50);
> > +
> > +	return 0;
> > +}
> > +
> > +static int mantix_prepare(struct drm_panel *panel)
> > +{
> > +	struct mantix *ctx = panel_to_mantix(panel);
> > +	int ret;
> > +
> > +	/* Focaltech FT8006P, section 7.3.1 and 7.3.4 */
> > +	dev_dbg(ctx->dev, "Resetting the panel\n");
> > +	ret = regulator_enable(ctx->vddi);
> > +	if (ret < 0) {
> > +		dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret);
> > +		return ret;
> > +	}
> Maybe add one empty line here
> > +	/* T1 + T2 */
> > +	usleep_range(8000, 10000);
> > +
> > +	ret = regulator_enable(ctx->avdd);
> > +	if (ret < 0) {
> > +		dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret);
> > +		return ret;
> > +	}
> > +
> > +	/* T2d */
> > +	usleep_range(3500, 4000);
> > +	ret = regulator_enable(ctx->avee);
> > +	if (ret < 0) {
> > +		dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret);
> > +		return ret;
> > +	}
> > +
> > +	/* T3+T5 */
> > +	usleep_range(10000, 12000);
> > +
> > +	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> > +	usleep_range(5150, 7000);
> > +
> > +	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> > +
> > +	/* T6 */
> > +	msleep(50);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct drm_display_mode default_mode = {
> > +	.hdisplay    = 720,
> > +	.hsync_start = 720 + 45,
> > +	.hsync_end   = 720 + 45 + 14,
> > +	.htotal	     = 720 + 45 + 14 + 25,
> > +	.vdisplay    = 1440,
> > +	.vsync_start = 1440 + 130,
> > +	.vsync_end   = 1440 + 130 + 8,
> > +	.vtotal	     = 1440 + 130 + 8 + 106,
> > +	.clock	     = 85298,
> > +	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> > +	.width_mm    = 65,
> > +	.height_mm   = 130,
> > +};
> > +
> > +static int mantix_get_modes(struct drm_panel *panel,
> > +			    struct drm_connector *connector)
> > +{
> > +	struct mantix *ctx = panel_to_mantix(panel);
> > +	struct drm_display_mode *mode;
> > +
> > +	mode = drm_mode_duplicate(connector->dev, &default_mode);
> > +	if (!mode) {
> > +		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
> > +			default_mode.hdisplay, default_mode.vdisplay,
> > +			drm_mode_vrefresh(mode));
> > +		return -ENOMEM;
> > +	}
> > +
> > +	drm_mode_set_name(mode);
> > +
> > +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> > +	connector->display_info.width_mm = mode->width_mm;
> > +	connector->display_info.height_mm = mode->height_mm;
> > +	drm_mode_probed_add(connector, mode);
> > +
> > +	return 1;
> > +}
> > +
> > +static const struct drm_panel_funcs mantix_drm_funcs = {
> > +	.disable   = mantix_disable,
> > +	.unprepare = mantix_unprepare,
> > +	.prepare   = mantix_prepare,
> > +	.enable	   = mantix_enable,
> > +	.get_modes = mantix_get_modes,
> > +};
> > +
> > +static int mantix_probe(struct mipi_dsi_device *dsi)
> > +{
> > +	struct device *dev = &dsi->dev;
> > +	struct mantix *ctx;
> > +	int ret;
> > +
> > +	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> > +	if (!ctx)
> > +		return -ENOMEM;
> > +
> > +	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> > +	if (IS_ERR(ctx->reset_gpio)) {
> > +		dev_err(dev, "cannot get reset gpio\n");
> > +		return PTR_ERR(ctx->reset_gpio);
> > +	}
> > +
> > +	mipi_dsi_set_drvdata(dsi, ctx);
> > +	ctx->dev = dev;
> > +
> > +	dsi->lanes = 4;
> > +	dsi->format = MIPI_DSI_FMT_RGB888;
> > +	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > +		MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
> > +
> > +	ctx->avdd = devm_regulator_get(dev, "avdd");
> > +	if (IS_ERR(ctx->avdd))
> > +		return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n");
> > +
> > +	ctx->avee = devm_regulator_get(dev, "avee");
> > +	if (IS_ERR(ctx->avee))
> > +		return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n");
> > +
> > +	ctx->vddi = devm_regulator_get(dev, "vddi");
> > +	if (IS_ERR(ctx->vddi))
> > +		return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n");
> > +
> > +	drm_panel_init(&ctx->panel, dev, &mantix_drm_funcs,
> > +		       DRM_MODE_CONNECTOR_DSI);
> > +
> > +	ret = drm_panel_of_backlight(&ctx->panel);
> > +	if (ret)
> > +		return ret;
> > +
> > +	drm_panel_add(&ctx->panel);
> > +
> > +	ret = mipi_dsi_attach(dsi);
> > +	if (ret < 0) {
> > +		dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
> > +		drm_panel_remove(&ctx->panel);
> > +		return ret;
> > +	}
> > +
> > +	dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
> > +		 default_mode.hdisplay, default_mode.vdisplay,
> > +		 drm_mode_vrefresh(&default_mode),
> > +		 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
> > +
> > +	return 0;
> > +}
> > +
> > +static void mantix_shutdown(struct mipi_dsi_device *dsi)
> > +{
> > +	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
> > +
> > +	drm_panel_unprepare(&ctx->panel);
> > +	drm_panel_disable(&ctx->panel);
> > +}
> > +
> > +static int mantix_remove(struct mipi_dsi_device *dsi)
> > +{
> > +	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
> > +
> > +	mantix_shutdown(dsi);
> > +
> > +	mipi_dsi_detach(dsi);
> > +	drm_panel_remove(&ctx->panel);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct of_device_id mantix_of_match[] = {
> > +	{ .compatible = "mantix,mlaf057we51-x" },
> > +	{ /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, mantix_of_match);
> > +
> > +static struct mipi_dsi_driver mantix_driver = {
> > +	.probe	= mantix_probe,
> > +	.remove = mantix_remove,
> > +	.shutdown = mantix_shutdown,
> > +	.driver = {
> > +		.name = DRV_NAME,
> > +		.of_match_table = mantix_of_match,
> > +	},
> > +};
> > +module_mipi_dsi_driver(mantix_driver);
> > +
> > +MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
> > +MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel");
> > +MODULE_LICENSE("GPL v2");
> > -- 
> > 2.26.2
> 

Re: [PATCH v2 3/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Sam Ravnborg]

On Sun, Aug 16, 2020 at 07:55:21PM +0200, Guido Günther wrote:
> Hi Sam,
> thanks for having a look!
> 
> On Sat, Aug 15, 2020 at 11:27:27PM +0200, Sam Ravnborg wrote:
> > Hi Guido.
> > 
> > On Sat, Aug 15, 2020 at 11:16:22PM +0200, Guido Günther wrote:
> > > The panel uses a Focaltech FT8006p, the touch part is handled by the
> > > already existing edt-ft5x06.
> > > 
> > > Signed-off-by: Guido Günther <agx@sigxcpu.org>
> > 
> > Two small nits - otherwise looks good.
> > Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> > 
> > I can fix while applying or you can send a new revision,
> > but I cannot apply until drm-misc-next have seen a backmerge
> > due to dev_err_probe() usage.
> 
> I'll send out a v3 with this fixed.
> 
> > Did you have commit rights yet?
> > If yes, then please apply yourself.
> 
> No commit rights here. So it would be great if you could apply the
> patches. Should I look for commit rights? I assume that means following
> 
>     https://drm.pages.freedesktop.org/maintainer-tools/commit-access.html#drm-misc    
I recall we discussed this before for some other driver.
For a single panel it is not needed, but if you continue to be active
on other parts it makes sense.


I will apply v3 when drm-misc-next is backmeged unless you tell me
otherwise. And ping me if I forgets.

	Sam

Re: [PATCH v2 3/3] drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel

[Guido Günther]

Hi Sam,
On Sun, Aug 16, 2020 at 09:04:17PM +0200, Sam Ravnborg wrote:
> On Sun, Aug 16, 2020 at 07:55:21PM +0200, Guido Günther wrote:
> > Hi Sam,
> > thanks for having a look!
> > 
> > On Sat, Aug 15, 2020 at 11:27:27PM +0200, Sam Ravnborg wrote:
> > > Hi Guido.
> > > 
> > > On Sat, Aug 15, 2020 at 11:16:22PM +0200, Guido Günther wrote:
> > > > The panel uses a Focaltech FT8006p, the touch part is handled by the
> > > > already existing edt-ft5x06.
> > > > 
> > > > Signed-off-by: Guido Günther <agx@sigxcpu.org>
> > > 
> > > Two small nits - otherwise looks good.
> > > Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> > > 
> > > I can fix while applying or you can send a new revision,
> > > but I cannot apply until drm-misc-next have seen a backmerge
> > > due to dev_err_probe() usage.
> > 
> > I'll send out a v3 with this fixed.
> > 
> > > Did you have commit rights yet?
> > > If yes, then please apply yourself.
> > 
> > No commit rights here. So it would be great if you could apply the
> > patches. Should I look for commit rights? I assume that means following
> > 
> >     https://drm.pages.freedesktop.org/maintainer-tools/commit-access.html#drm-misc    
> I recall we discussed this before for some other driver.
> For a single panel it is not needed, but if you continue to be active
> on other parts it makes sense.

I think st7703, mantix and nwl all go in via drm-misc so it might make
sense. Thanks for the suggestion!

> I will apply v3 when drm-misc-next is backmeged unless you tell me
> otherwise. And ping me if I forgets.

Thanks!
 -- Guido