linux-kernel - [PATCH 2/2] drm/tidss: Add support for AM62L display subsystem

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Message-ID: <20241231090432.3649158-3-devarsht@ti.com>
Date: Tue, 31 Dec 2024 14:34:32 +0530
From: Devarsh Thakkar <devarsht@...com>
To: <jyri.sarha@....fi>, <tomi.valkeinen@...asonboard.com>,
        <airlied@...il.com>, <maarten.lankhorst@...ux.intel.com>,
        <mripard@...nel.org>, <tzimmermann@...e.de>,
        <dri-devel@...ts.freedesktop.org>, <simona@...ll.ch>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <praneeth@...com>, <vigneshr@...com>, <aradhya.bhatia@...ux.dev>,
        <s-jain1@...com>, <r-donadkar@...com>, <j-choudhary@...com>,
        <h-shenoy@...com>, <devarsht@...com>
Subject: [PATCH 2/2] drm/tidss: Add support for AM62L display subsystem

Enable display for AM62L DSS [1] which supports only a single display
pipeline using a single overlay manager, single video port and a single
video lite pipeline which does not support scaling.

The output of video port is routed to SoC boundary via DPI interface and
the DPI signals from the video port are also routed to DSI Tx controller
present within the SoC.

[1]: Section 11.7 (Display Subsystem and Peripherals)
Link : https://www.ti.com/lit/pdf/sprujb4

Signed-off-by: Devarsh Thakkar <devarsht@...com>
---
 drivers/gpu/drm/tidss/tidss_dispc.c | 34 +++++++++++++++++++++++++++++
 drivers/gpu/drm/tidss/tidss_dispc.h |  2 ++
 drivers/gpu/drm/tidss/tidss_drv.c   |  1 +
 3 files changed, 37 insertions(+)

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index cacb5f3d8085..cd322d60b825 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -376,6 +376,35 @@ const struct dispc_features dispc_am62a7_feats = {
 	.vid_order = { 1, 0 },
 };
 
+const struct dispc_features dispc_am62l_feats = {
+	.max_pclk_khz = {
+		[DISPC_VP_DPI] = 165000,
+	},
+
+	.subrev = DISPC_AM62L,
+
+	.common = "common",
+	.common_regs = tidss_am65x_common_regs,
+
+	.num_vps = 1,
+	.vp_name = { "vp1" },
+	.ovr_name = { "ovr1" },
+	.vpclk_name =  { "vp1" },
+	.vp_bus_type = { DISPC_VP_DPI },
+
+	.vp_feat = { .color = {
+			.has_ctm = true,
+			.gamma_size = 256,
+			.gamma_type = TIDSS_GAMMA_8BIT,
+		},
+	},
+
+	.num_planes = 1,
+	.vid_name = { "vidl1" },
+	.vid_lite = { true },
+	.vid_order = { 0 },
+};
+
 static const u16 *dispc_common_regmap;
 
 struct dss_vp_data {
@@ -879,6 +908,7 @@ dispc_irq_t dispc_read_and_clear_irqstatus(struct dispc_device *dispc)
 		return dispc_k2g_read_and_clear_irqstatus(dispc);
 	case DISPC_AM625:
 	case DISPC_AM62A7:
+	case DISPC_AM62L:
 	case DISPC_AM65X:
 	case DISPC_J721E:
 		return dispc_k3_read_and_clear_irqstatus(dispc);
@@ -896,6 +926,7 @@ void dispc_set_irqenable(struct dispc_device *dispc, dispc_irq_t mask)
 		break;
 	case DISPC_AM625:
 	case DISPC_AM62A7:
+	case DISPC_AM62L:
 	case DISPC_AM65X:
 	case DISPC_J721E:
 		dispc_k3_set_irqenable(dispc, mask);
@@ -1388,6 +1419,7 @@ void dispc_ovr_set_plane(struct dispc_device *dispc, u32 hw_plane,
 		break;
 	case DISPC_AM625:
 	case DISPC_AM62A7:
+	case DISPC_AM62L:
 	case DISPC_AM65X:
 		dispc_am65x_ovr_set_plane(dispc, hw_plane, hw_videoport,
 					  x, y, layer);
@@ -2308,6 +2340,7 @@ static void dispc_plane_init(struct dispc_device *dispc)
 		break;
 	case DISPC_AM625:
 	case DISPC_AM62A7:
+	case DISPC_AM62L:
 	case DISPC_AM65X:
 	case DISPC_J721E:
 		dispc_k3_plane_init(dispc);
@@ -2416,6 +2449,7 @@ static void dispc_vp_write_gamma_table(struct dispc_device *dispc,
 		break;
 	case DISPC_AM625:
 	case DISPC_AM62A7:
+	case DISPC_AM62L:
 	case DISPC_AM65X:
 		dispc_am65x_vp_write_gamma_table(dispc, hw_videoport);
 		break;
diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
index 086327d51a90..275de8d02b75 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.h
+++ b/drivers/gpu/drm/tidss/tidss_dispc.h
@@ -62,6 +62,7 @@ enum dispc_dss_subrevision {
 	DISPC_K2G,
 	DISPC_AM625,
 	DISPC_AM62A7,
+	DISPC_AM62L,
 	DISPC_AM65X,
 	DISPC_J721E,
 };
@@ -91,6 +92,7 @@ struct dispc_features {
 extern const struct dispc_features dispc_k2g_feats;
 extern const struct dispc_features dispc_am625_feats;
 extern const struct dispc_features dispc_am62a7_feats;
+extern const struct dispc_features dispc_am62l_feats;
 extern const struct dispc_features dispc_am65x_feats;
 extern const struct dispc_features dispc_j721e_feats;
 
diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
index d4652e8cc28c..f2a4f659f574 100644
--- a/drivers/gpu/drm/tidss/tidss_drv.c
+++ b/drivers/gpu/drm/tidss/tidss_drv.c
@@ -242,6 +242,7 @@ static const struct of_device_id tidss_of_table[] = {
 	{ .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
 	{ .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
 	{ .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
+	{ .compatible = "ti,am62l-dss", .data = &dispc_am62l_feats, },
 	{ .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
 	{ .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
 	{ }
-- 
2.39.1