File ati-vga-try-vga-ddc-first.patch of Package qemu

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File ati-vga-try-vga-ddc-first.patch of Package qemu (Revision 2649452088470fff609e57325de9d9df)

Currently displaying revision 2649452088470fff609e57325de9d9df , Show latest

From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 24 Jun 2019 12:17:28 +0200
Subject: ati-vga: try vga ddc first

Git-commit: af573dceef7b9a45d13192ec5abf29b73c78540e

Try vga ddc bus before dvi ddc bus.
Return early in case we got valid data.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 vgasrc/atiext.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/roms/seabios/vgasrc/atiext.c b/roms/seabios/vgasrc/atiext.c
index 901e82d013837f54f4db292628d1..71dfa859a22dc569ed2fd1312c6b 100644
--- a/roms/seabios/vgasrc/atiext.c
+++ b/roms/seabios/vgasrc/atiext.c
@@ -299,6 +299,15 @@ static void ati_i2c_edid_radeon(void)
     SET_VGA(ati_i2c_bit_sda_out, 16);
     SET_VGA(ati_i2c_bit_sda_in, 8);
 
+    dprintf(1, "ati: reading edid blob (radeon vga) ... \n");
+    SET_VGA(ati_i2c_reg, GPIO_VGA_DDC);
+    ati_i2c_edid();
+    valid = (GET_GLOBAL(VBE_edid[0]) == 0x00 &&
+             GET_GLOBAL(VBE_edid[1]) == 0xff);
+    dprintf(1, "ati: ... %s\n", valid ? "good" : "invalid");
+    if (valid)
+        return;
+
     dprintf(1, "ati: reading edid blob (radeon dvi) ... \n");
     SET_VGA(ati_i2c_reg, GPIO_DVI_DDC);
     ati_i2c_edid();

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File ati-vga-try-vga-ddc-first.patch of Package qemu (Revision 2649452088470fff609e57325de9d9df)

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