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dm: core: add a function to decode display timings

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The patch adds a function to get display timings from the device tree
node attached to the device.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Dario Binacchi
2020-12-30 00:16:26 +01:00
committed by Lokesh Vutla
parent 0f4effb05b
commit 15daa4860b
4 changed files with 156 additions and 0 deletions
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80
test/dm/test-fdt.c
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@@ -1152,3 +1152,83 @@ static int dm_test_ofdata_order(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_ofdata_order, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/* Test dev_decode_display_timing() */
static int dm_test_decode_display_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_display_timing(dev, 0, &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);
ut_assertok(dev_decode_display_timing(dev, 1, &timing));
ut_assert(timing.hactive.typ == 480);
ut_assert(timing.hback_porch.typ == 59);
ut_assert(timing.hfront_porch.typ == 10);
ut_assert(timing.hsync_len.typ == 12);
ut_assert(timing.vactive.typ == 800);
ut_assert(timing.vback_porch.typ == 15);
ut_assert(timing.vfront_porch.typ == 17);
ut_assert(timing.vsync_len.typ == 16);
ut_assert(timing.pixelclock.typ == 9000000);
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));
ut_assertok(dev_decode_display_timing(dev, 2, &timing));
ut_assert(timing.hactive.typ == 800);
ut_assert(timing.hback_porch.typ == 89);
ut_assert(timing.hfront_porch.typ == 164);
ut_assert(timing.hsync_len.typ == 11);
ut_assert(timing.vactive.typ == 480);
ut_assert(timing.vback_porch.typ == 23);
ut_assert(timing.vfront_porch.typ == 10);
ut_assert(timing.vsync_len.typ == 13);
ut_assert(timing.pixelclock.typ == 33500000);
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));
ut_assert(dev_decode_display_timing(dev, 3, &timing));
return 0;
}
DM_TEST(dm_test_decode_display_timing, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);