36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Mon, 24 Jun 2019 12:17:28 +0200
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Subject: ati-vga: try vga ddc first
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Git-commit: af573dceef7b9a45d13192ec5abf29b73c78540e
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Try vga ddc bus before dvi ddc bus.
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Return early in case we got valid data.
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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vgasrc/atiext.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/roms/seabios/vgasrc/atiext.c b/roms/seabios/vgasrc/atiext.c
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index 901e82d013837f54f4db292628d1..71dfa859a22dc569ed2fd1312c6b 100644
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--- a/roms/seabios/vgasrc/atiext.c
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+++ b/roms/seabios/vgasrc/atiext.c
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@@ -299,6 +299,15 @@ static void ati_i2c_edid_radeon(void)
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SET_VGA(ati_i2c_bit_sda_out, 16);
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SET_VGA(ati_i2c_bit_sda_in, 8);
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+ dprintf(1, "ati: reading edid blob (radeon vga) ... \n");
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+ SET_VGA(ati_i2c_reg, GPIO_VGA_DDC);
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+ ati_i2c_edid();
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+ valid = (GET_GLOBAL(VBE_edid[0]) == 0x00 &&
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+ GET_GLOBAL(VBE_edid[1]) == 0xff);
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+ dprintf(1, "ati: ... %s\n", valid ? "good" : "invalid");
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+ if (valid)
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+ return;
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+
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dprintf(1, "ati: reading edid blob (radeon dvi) ... \n");
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SET_VGA(ati_i2c_reg, GPIO_DVI_DDC);
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ati_i2c_edid();
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