drm/panel: simple: Add support for AUO T215HVN01

The AUO T215HVN01 is a 21.5" FHD (1920x1080) color TFT LCD panel.

This panel is used on the Acer Chromebase 21.5-inch All-in-One (DC221HQ).

Link to spec: http://www.udmgroup.com/ftp/T215HVN01.0.pdf

v2: fix alphabetical order
v3: remove minor revision suffix ".0" and add link to spec
v4: add dt-binding documentation

Signed-off-by: Haixia Shi <[e-mail]>
Tested-by: Haixia Shi <[e-mail]>
Reviewed-by: Stéphane Marchesin <[e-mail]>
Cc: Emil Velikov <[e-mail]>
Cc: Thierry Reding <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

Documentation/devicetree/bindings/display/panel/auo,t215hvn01.txt

···
+AU Optronics Corporation 21.5" FHD (1920x1080) color TFT LCD panel
+
+Required properties:
+- compatible: should be "auo,t215hvn01"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.

drivers/gpu/drm/panel/panel-simple.c

···
 	},
 };
 
+static const struct drm_display_mode auo_t215hvn01_mode = {
+	.clock = 148800,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 88,
+	.hsync_end = 1920 + 88 + 44,
+	.htotal = 1920 + 88 + 44 + 148,
+	.vdisplay = 1080,
+	.vsync_start = 1080 + 4,
+	.vsync_end = 1080 + 4 + 5,
+	.vtotal = 1080 + 4 + 5 + 36,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc auo_t215hvn01 = {
+	.modes = &auo_t215hvn01_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 430,
+		.height = 270,
+	},
+	.delay = {
+		.disable = 5,
+		.unprepare = 1000,
+	}
+};
+
 static const struct drm_display_mode avic_tm070ddh03_mode = {
 	.clock = 51200,
 	.hdisplay = 1024,
···
 	}, {
 		.compatible = "auo,b133xtn01",
 		.data = &auo_b133xtn01,
+	}, {
+		.compatible = "auo,t215hvn01",
+		.data = &auo_t215hvn01,
 	}, {
 		.compatible = "avic,tm070ddh03",
 		.data = &avic_tm070ddh03,