From 2f3d6a42300616630b3c9c1e52cb6e58da390393 Mon Sep 17 00:00:00 2001
From: Nikhil M Jain <n-jain1@ti.com>
Date: Tue, 31 Jan 2023 15:35:15 +0530
Subject: [PATCH] test: dm: test-fdt: Add decode_panel_timing test

To test decode_panel_timing add a panel-timings node
and a DM test for decode panel timingd by matching
the panel timing node parameters.

Signed-off-by: Nikhil M Jain <n-jain1@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 arch/sandbox/dts/test.dts | 18 ++++++++++++++++++
 test/dm/test-fdt.c        | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 8c05927670..f98f0152ee 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -342,6 +342,24 @@
 				vsync-len = <13>;
 			};
 		};
+		panel-timings {
+			clock-frequency = <6500000>;
+			hactive = <240>;
+			vactive = <320>;
+			hfront-porch = <6>;
+			hback-porch = <7>;
+			hsync-len = <1>;
+			vback-porch = <5>;
+			vfront-porch = <8>;
+			vsync-len = <2>;
+			hsync-active = <1>;
+			vsync-active = <0>;
+			de-active = <1>;
+			pixelclk-active = <1>;
+			interlaced;
+			doublescan;
+			doubleclk;
+		};
 	};
 
 	junk {
diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
index 7cd2d04612..1d2af94f56 100644
--- a/test/dm/test-fdt.c
+++ b/test/dm/test-fdt.c
@@ -12,6 +12,7 @@
 #include <asm/global_data.h>
 #include <asm/io.h>
 #include <dm/test.h>
+#include <dm/read.h>
 #include <dm/root.h>
 #include <dm/device-internal.h>
 #include <dm/devres.h>
@@ -1157,6 +1158,41 @@ static int dm_test_decode_display_timing(struct unit_test_state *uts)
 }
 DM_TEST(dm_test_decode_display_timing, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
 
+/* Test dev_decode_panel_timing() */
+static int dm_test_decode_panel_timing(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	struct display_timing timing;
+
+	ut_assertok(uclass_first_device_err(UCLASS_TEST_FDT, &dev));
+	ut_asserteq_str("a-test", dev->name);
+
+	ut_assertok(dev_decode_panel_timing(dev, &timing));
+	ut_assert(timing.hactive.typ == 240);
+	ut_assert(timing.hback_porch.typ == 7);
+	ut_assert(timing.hfront_porch.typ == 6);
+	ut_assert(timing.hsync_len.typ == 1);
+	ut_assert(timing.vactive.typ == 320);
+	ut_assert(timing.vback_porch.typ == 5);
+	ut_assert(timing.vfront_porch.typ == 8);
+	ut_assert(timing.vsync_len.typ == 2);
+	ut_assert(timing.pixelclock.typ == 6500000);
+	ut_assert(timing.flags & DISPLAY_FLAGS_HSYNC_HIGH);
+	ut_assert(!(timing.flags & DISPLAY_FLAGS_HSYNC_LOW));
+	ut_assert(!(timing.flags & DISPLAY_FLAGS_VSYNC_HIGH));
+	ut_assert(timing.flags & DISPLAY_FLAGS_VSYNC_LOW);
+	ut_assert(timing.flags & DISPLAY_FLAGS_DE_HIGH);
+	ut_assert(!(timing.flags & DISPLAY_FLAGS_DE_LOW));
+	ut_assert(timing.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE);
+	ut_assert(!(timing.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE));
+	ut_assert(timing.flags & DISPLAY_FLAGS_INTERLACED);
+	ut_assert(timing.flags & DISPLAY_FLAGS_DOUBLESCAN);
+	ut_assert(timing.flags & DISPLAY_FLAGS_DOUBLECLK);
+
+	return 0;
+}
+DM_TEST(dm_test_decode_panel_timing, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+
 /* Test read_resourcee() */
 static int dm_test_read_resource(struct unit_test_state *uts)
 {