linux-kernel - [PATCH 4/4] drm/panel: Add the Raspberry Pi 7" touchscreen's panel.

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Message-Id: <20170511235625.22427-5-eric@anholt.net>
Date:   Thu, 11 May 2017 16:56:25 -0700
From:   Eric Anholt <eric@...olt.net>
To:     dri-devel@...ts.freedesktop.org,
        Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Eric Anholt <eric@...olt.net>
Subject: [PATCH 4/4] drm/panel: Add the Raspberry Pi 7" touchscreen's panel.

The timings are those that the firmware defines as the baseline, which
will be modified by the bridge/host as necessary to get the clocking
to work.

Signed-off-by: Eric Anholt <eric@...olt.net>
---
 drivers/gpu/drm/panel/panel-simple.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index c4566ce8fda7..5bd026cf432b 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1530,6 +1530,33 @@ static const struct panel_desc qd43003c0_40 = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode raspberrypi_7inch_mode = {
+	/* Modeline comes from the Raspberry Pi firmware, with HFP=1
+	 * plugged in and clock re-computed from that.
+	 */
+	.clock = 25979400 / 1000,
+	.hdisplay = 800,
+	.hsync_start = 800 + 1,
+	.hsync_end = 800 + 1 + 2,
+	.htotal = 800 + 1 + 2 + 46,
+	.vdisplay = 480,
+	.vsync_start = 480 + 7,
+	.vsync_end = 480 + 7 + 2,
+	.vtotal = 480 + 7 + 2 + 21,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc raspberrypi_7inch = {
+	.modes = &raspberrypi_7inch_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 154,
+		.height = 86,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+};
+
 static const struct drm_display_mode samsung_lsn122dl01_c01_mode = {
 	.clock = 271560,
 	.hdisplay = 2560,
@@ -1996,6 +2023,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "qiaodian,qd43003c0-40",
 		.data = &qd43003c0_40,
 	}, {
+		.compatible = "raspberrypi,7inch-touchscreen-panel",
+		.data = &raspberrypi_7inch,
+	}, {
 		.compatible = "samsung,lsn122dl01-c01",
 		.data = &samsung_lsn122dl01_c01,
 	}, {
-- 
2.11.0