[PATCH 2/2] drivers/tidss: Add support for AM62A7 DSS

[Aradhya Bhatia]

Add support for the DSS controller on TI's AM62A7 SoC in the tidss
driver.

This contrller has 2 video pipelines that can render 2 video planes on
over a screen, using the overlay managers. The output of the DSS comes
from video port 2 (VP2) in the form of RGB88 DPI signals, while the VP1
is tied off inside the SoC.

Signed-off-by: Aradhya Bhatia <a-bhatia1 at ti.com>
---
 drivers/gpu/drm/tidss/tidss_dispc.c | 53 +++++++++++++++++++++++++++++
 drivers/gpu/drm/tidss/tidss_dispc.h |  2 ++
 drivers/gpu/drm/tidss/tidss_drv.c   |  1 +
 3 files changed, 56 insertions(+)

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index 9d9dee7abaef..0e2d55d9a0d7 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -322,6 +322,54 @@ const struct dispc_features dispc_am625_feats = {
 	.vid_order = { 1, 0 },
 };
 
+const struct dispc_features dispc_am62a7_feats = {
+	.max_pclk_khz = {
+		[DISPC_VP_DPI] = 165000,
+	},
+
+	.scaling = {
+		.in_width_max_5tap_rgb = 1280,
+		.in_width_max_3tap_rgb = 2560,
+		.in_width_max_5tap_yuv = 2560,
+		.in_width_max_3tap_yuv = 4096,
+		.upscale_limit = 16,
+		.downscale_limit_5tap = 4,
+		.downscale_limit_3tap = 2,
+		/*
+		 * The max supported pixel inc value is 255. The value
+		 * of pixel inc is calculated like this: 1+(xinc-1)*bpp.
+		 * The maximum bpp of all formats supported by the HW
+		 * is 8. So the maximum supported xinc value is 32,
+		 * because 1+(32-1)*8 < 255 < 1+(33-1)*4.
+		 */
+		.xinc_max = 32,
+	},
+
+	.subrev = DISPC_AM62A7,
+
+	.common = "common",
+	.common_regs = tidss_am65x_common_regs,
+
+	.num_vps = 2,
+	.vp_name = { "vp1", "vp2" },
+	.ovr_name = { "ovr1", "ovr2" },
+	.vpclk_name =  { "vp1", "vp2" },
+	.vp_bus_type = { DISPC_VP_INTERNAL, DISPC_VP_DPI },
+
+	.vp_feat = { .color = {
+			.has_ctm = true,
+			.gamma_size = 256,
+			.gamma_type = TIDSS_GAMMA_8BIT,
+		},
+	},
+
+	.num_planes = 2,
+	/* note: vid is plane_id 0 and vidl1 is plane_id 1 */
+	.vid_name = { "vid", "vidl1" },
+	.vid_lite = { false, true, },
+	.vid_order = { 1, 0 },
+};
+
 static const u16 *dispc_common_regmap;
 
 struct dss_vp_data {
@@ -823,6 +871,7 @@ dispc_irq_t dispc_read_and_clear_irqstatus(struct dispc_device *dispc)
 	switch (dispc->feat->subrev) {
 	case DISPC_K2G:
 		return dispc_k2g_read_and_clear_irqstatus(dispc);
+	case DISPC_AM62A7:
 	case DISPC_AM625:
 	case DISPC_AM65X:
 	case DISPC_J721E:
@@ -839,6 +888,7 @@ void dispc_set_irqenable(struct dispc_device *dispc, dispc_irq_t mask)
 	case DISPC_K2G:
 		dispc_k2g_set_irqenable(dispc, mask);
 		break;
+	case DISPC_AM62A7:
 	case DISPC_AM625:
 	case DISPC_AM65X:
 	case DISPC_J721E:
@@ -1330,6 +1380,7 @@ void dispc_ovr_set_plane(struct dispc_device *dispc, u32 hw_plane,
 		dispc_k2g_ovr_set_plane(dispc, hw_plane, hw_videoport,
 					x, y, layer);
 		break;
+	case DISPC_AM62A7:
 	case DISPC_AM625:
 	case DISPC_AM65X:
 		dispc_am65x_ovr_set_plane(dispc, hw_plane, hw_videoport,
@@ -2249,6 +2300,7 @@ static void dispc_plane_init(struct dispc_device *dispc)
 	case DISPC_K2G:
 		dispc_k2g_plane_init(dispc);
 		break;
+	case DISPC_AM62A7:
 	case DISPC_AM625:
 	case DISPC_AM65X:
 	case DISPC_J721E:
@@ -2356,6 +2408,7 @@ static void dispc_vp_write_gamma_table(struct dispc_device *dispc,
 	case DISPC_K2G:
 		dispc_k2g_vp_write_gamma_table(dispc, hw_videoport);
 		break;
+	case DISPC_AM62A7:
 	case DISPC_AM625:
 	case DISPC_AM65X:
 		dispc_am65x_vp_write_gamma_table(dispc, hw_videoport);
diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
index 33ac5ad7a423..2aa1c814ea2a 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.h
+++ b/drivers/gpu/drm/tidss/tidss_dispc.h
@@ -59,6 +59,7 @@ enum dispc_vp_bus_type {
 
 enum dispc_dss_subrevision {
 	DISPC_K2G,
+	DISPC_AM62A7,
 	DISPC_AM625,
 	DISPC_AM65X,
 	DISPC_J721E,
@@ -88,6 +89,7 @@ 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_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 4d063eb9cd0b..edf69d020544 100644
--- a/drivers/gpu/drm/tidss/tidss_drv.c
+++ b/drivers/gpu/drm/tidss/tidss_drv.c
@@ -231,6 +231,7 @@ static void tidss_shutdown(struct platform_device *pdev)
 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,am65x-dss", .data = &dispc_am65x_feats, },
 	{ .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
 	{ }
-- 
2.40.1