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From 9397be4c801c71c84bc4ba6036efea32f5426c2e Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Fri, 29 Apr 2016 07:02:46 +0200
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Subject: [PATCH 1/6] vga: Remove some "should be done in BIOS" comments
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RH-Author: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: <1461913371-3145-2-git-send-email-kraxel@redhat.com>
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Patchwork-id: 70301
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O-Subject: [virt-devel] [RHEL-7.2.z qemu-kvm PATCH 1/6] vga: Remove some "should be done in BIOS" comments
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Bugzilla: 1331412
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Not all platforms have a VGA BIOS, powerpc typically relies on
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using the DISPI interface to initialize the card.
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/display/vga.c | 6 ++----
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1 file changed, 2 insertions(+), 4 deletions(-)
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diff --git a/hw/display/vga.c b/hw/display/vga.c
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index 0761b9e..48dad03 100644
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--- a/hw/display/vga.c
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+++ b/hw/display/vga.c
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@@ -764,14 +764,13 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
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s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
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vbe_fixup_regs(s);
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- /* clear the screen (should be done in BIOS) */
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+ /* clear the screen */
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if (!(val & VBE_DISPI_NOCLEARMEM)) {
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memset(s->vram_ptr, 0,
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s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
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}
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- /* we initialize the VGA graphic mode (should be done
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- in BIOS) */
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+ /* we initialize the VGA graphic mode */
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/* graphic mode + memory map 1 */
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s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
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VGA_GR06_GRAPHICS_MODE;
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@@ -804,7 +803,6 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
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(shift_control << 5);
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s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
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} else {
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- /* XXX: the bios should do that */
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s->bank_offset = 0;
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}
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s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
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--
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1.8.3.1
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