linux-kernel - [PATCH v2 3/3] drm/panel: simple: add Tianma P0700WXF1MBAA panel

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Message-Id: <20250407-tianma-p0700wxf1mbaa-v2-3-ede8c5a3f538@bootlin.com>
Date: Mon, 07 Apr 2025 18:34:01 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, Sam Ravnborg <sam@...nborg.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 "Pu, Hui" <Hui.Pu@...ealthcare.com>, dri-devel@...ts.freedesktop.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH v2 3/3] drm/panel: simple: add Tianma P0700WXF1MBAA panel

Add the Tianma P0700WXF1MBAA 7" 1280x800 LVDS RGB TFT LCD panel.

Reuse the timings of the TM070JDHG34-00 as they are identical, even though
they are described differently by the datasheet as noted in the
comment. Power up/down timing are slightly different, so add a new struct
panel_desc for that.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 3496ed3e62056938ccc0ed2389ea46eed8d17ea2..0bc20547fc3b3b7164e7f5743d30332c479414b5 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -4418,10 +4418,10 @@ static const struct panel_desc tianma_tm070jvhg33 = {
 };
 
 /*
- * The datasheet computes total blanking as back porch + front porch, not
- * including sync pulse width. This is for both H and V. To make the total
- * blanking and period correct, subtract the pulse width from the front
- * porch.
+ * The TM070JDHG34-00 datasheet computes total blanking as back porch +
+ * front porch, not including sync pulse width. This is for both H and
+ * V. To make the total blanking and period correct, subtract the pulse
+ * width from the front porch.
  *
  * This works well for the Min and Typ values, but for Max values the sync
  * pulse width is higher than back porch + front porch, so work around that
@@ -4430,6 +4430,10 @@ static const struct panel_desc tianma_tm070jvhg33 = {
  *
  * Exact datasheet values are added as a comment where they differ from the
  * ones implemented for the above reason.
+ *
+ * The P0700WXF1MBAA datasheet is even less detailed, only listing period
+ * and total blanking time, however the resulting values are the same as
+ * the TM070JDHG34-00.
  */
 static const struct display_timing tianma_tm070jdhg34_00_timing = {
 	.pixelclock = { 68400000, 71900000, 78100000 },
@@ -4462,6 +4466,24 @@ static const struct panel_desc tianma_tm070jdhg34_00 = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct panel_desc tianma_p0700wxf1mbaa = {
+	.timings = &tianma_tm070jdhg34_00_timing,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 150, /* 149.76 */
+		.height = 94, /* 93.60 */
+	},
+	.delay = {
+		.prepare = 18,		/* Tr + Tp1 */
+		.enable = 152,		/* Tp2 + Tp5 */
+		.disable = 152,		/* Tp6 + Tp4 */
+		.unprepare = 120,	/* Tp3 */
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
+};
+
 static const struct display_timing tianma_tm070rvhg71_timing = {
 	.pixelclock = { 27700000, 29200000, 39600000 },
 	.hactive = { 800, 800, 800 },
@@ -5247,6 +5269,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "tfc,s9700rtwv43tr-01b",
 		.data = &tfc_s9700rtwv43tr_01b,
+	}, {
+		.compatible = "tianma,p0700wxf1mbaa",
+		.data = &tianma_p0700wxf1mbaa,
 	}, {
 		.compatible = "tianma,tm070jdhg30",
 		.data = &tianma_tm070jdhg30,

-- 
2.49.0