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From c5ee3f3aab59ff26b0fed770077a16714da9696e Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 28 Apr 2016 16:07:27 +0200
Subject: [PATCH 22/27] vga: Remove some "should be done in BIOS" comments
RH-Author: Gerd Hoffmann <kraxel@redhat.com>
Message-id: <1461859652-20918-2-git-send-email-kraxel@redhat.com>
Patchwork-id: 70292
O-Subject: [virt-devel] [RHEL-7.3 qemu-kvm PATCH 1/6] vga: Remove some "should be done in BIOS" comments
Bugzilla: 1331413
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Not all platforms have a VGA BIOS, powerpc typically relies on
using the DISPI interface to initialize the card.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
(cherry picked from commit ace89b8ff21cc3fb20986a334e54e6e6a1ccf729)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
hw/display/vga.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 0761b9e..48dad03 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -764,14 +764,13 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
vbe_fixup_regs(s);
- /* clear the screen (should be done in BIOS) */
+ /* clear the screen */
if (!(val & VBE_DISPI_NOCLEARMEM)) {
memset(s->vram_ptr, 0,
s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
}
- /* we initialize the VGA graphic mode (should be done
- in BIOS) */
+ /* we initialize the VGA graphic mode */
/* graphic mode + memory map 1 */
s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
VGA_GR06_GRAPHICS_MODE;
@@ -804,7 +803,6 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
(shift_control << 5);
s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
} else {
- /* XXX: the bios should do that */
s->bank_offset = 0;
}
s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
--
1.8.3.1