[SeaBIOS] [PATCH 3/4] bochsvga: Implement vbe 15h function
Hiroshi Miura
miurahr at linux.com
Sun Oct 28 03:19:20 CET 2012
This patch adds the ability for the Bochs VGA ROM to return information
about a HD wide monitor.
It is constructed from defitions at run time.
Inspired by this patch I digged out from the vgabios mailing list:
http://old.nabble.com/VBE-BIOS-support-for-monitor-information-(EDID)-td22952446.html
Signed-off-by: Hiroshi Miura <miurahr at linux.com>
---
Makefile | 3 +-
vgasrc/bochsedid.c | 101 ++++++++++++++++++++++++++++++++++++++
vgasrc/bochsedid.h | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++
vgasrc/bochsvga.c | 1 +
vgasrc/vgahw.h | 5 ++
5 files changed, 246 insertions(+), 1 deletion(-)
create mode 100644 vgasrc/bochsedid.c
create mode 100644 vgasrc/bochsedid.h
diff --git a/Makefile b/Makefile
index 45ea48a..d3e22b9 100644
--- a/Makefile
+++ b/Makefile
@@ -189,7 +189,8 @@ $(OUT)bios.bin.elf $(OUT)bios.bin: $(OUT)rom.o tools/checkrom.py
SRCVGA=src/output.c src/util.c src/pci.c \
vgasrc/vgabios.c vgasrc/vgafb.c vgasrc/vgafonts.c vgasrc/vbe.c \
vgasrc/stdvga.c vgasrc/stdvgamodes.c vgasrc/stdvgaio.c \
- vgasrc/clext.c vgasrc/bochsvga.c vgasrc/geodevga.c
+ vgasrc/clext.c vgasrc/bochsvga.c vgasrc/geodevga.c \
+ vgasrc/bochsedid.c
CFLAGS16VGA = $(CFLAGS16INC) -Isrc
diff --git a/vgasrc/bochsedid.c b/vgasrc/bochsedid.c
new file mode 100644
index 0000000..ec43d41
--- /dev/null
+++ b/vgasrc/bochsedid.c
@@ -0,0 +1,101 @@
+// VESA VBE EDID capability for virtual display
+//
+// Copyright (C) 2012 Hiroshi Miura <miurahr at linux.com>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "vbe.h" // VBE_CAPABILITY_8BIT_DAC
+#include "biosvar.h" // GET_GLOBAL
+#include "util.h" // dprintf
+#include "config.h" // CONFIG_*
+#include "bochsedid.h"
+
+struct edid_detailed_timing edid_dtd_1920x1200 VAR16 = {
+ 0x4B7D, 0xB0, 0xA0, 0x72, 0xB0, 0x2D,
+ 0x40, 0x88, 0xC8, 0x55, 0x75, 0x21,
+ 0x00, 0x00, 0x1C};
+struct edid_monitor_range_limit edid_range_limit VAR16 = {
+ {0x00,0x00,0x00,0xfD,0x00},
+ 50,150, /* Vertical 50Hz - 150Hz */
+ 31,135, /* Horiz 31kHz - 135kHz */
+ 20, /* clock 200MHz */
+ 0, /* no ext */
+ 0x0A,0x20,0x20,
+ 0x2020,
+ 0x20,0x20 /* padding */
+ };
+struct edid_monitor_text edid_serial VAR16 = {
+ {0,0,0,0xFF,0},
+ {'1','2','3','4','5','6','7','8','9','0',0x0A, 0x20, 0x20}
+};
+struct edid_monitor_text edid_name VAR16 = {
+ {0,0,0,0xFC,0},
+ {'S','e','a',' ','V','G','A','B','I','O','S',0x0A, 0x20}
+};
+
+struct edid_info BochsEDID VAR16 = {
+ .header={0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00},
+ .vendor=0x2104, .product=0xCDAB, .serial=0x00000000,
+ .week=36, .year=22, .major_version=1, .minor_version=3,
+ .video_setup=0x0F,
+ /* Video signal interface (analogue, 0.700 : 0.300 : 1.000 V p-p,
+ Video Setup: Blank Level = Black Level, Separate Sync H & V Signals are
+ supported, Composite Sync Signal on Horizontal is supported, Composite
+ Sync Signal on Green Video is supported, Serration on the Vertical Sync
+ is supported) */
+ .screen_width=0x21, .screen_height=0x19,/* 330 mm * 250 mm */
+ .gamma=0x78,/* 2.2 */
+ .feature_flag=0x0F,/* no DMPS states, RGB, display is continuous frequency, prefered mode */
+ .least_chromaticity={0x78, 0xF5},
+ .most_chromaticity={0xA6,0x55,0x48,0x9B,0x26,0x12,0x50,0x54},
+ .established_timing={0xFF,0xEF,0x80},
+ /* 720x400 at 70Hz, 720x400 at 88Hz, 640x480 at 60Hz, 640x480 at 67Hz, 640x480 at 72Hz, 640x480 at 75Hz,
+ 800x600 at 56Hz, 800x600 at 60Hz, 800x600 at 72Hz, 800x600 at 75Hz, 832x624 at 75Hz, 1152x870 at 75Hz,
+ not 1024x768 at 87Hz(I), 1024x768 at 60Hz, 1024x768 at 70Hz, 1024x768 at 75Hz, 1280x1024 at 75Hz */
+ .standard_timing={EDID_STD_640x480_85Hz, EDID_STD_800x600_85Hz,
+ EDID_STD_1024x768_85Hz, EDID_STD_1280x720_70Hz,
+ EDID_STD_1280x960_60Hz, EDID_STD_1440x900_60Hz,
+ EDID_STD_1600x1200_60Hz,EDID_STD_NOP},
+};
+
+void bochs_pupulate_edid_block0(u8 next)
+{
+ /* detailed timing block */
+ memcpy_far(get_global_seg(), &(BochsEDID.desc[0]), get_global_seg(),
+ &edid_dtd_1920x1200, sizeof (struct edid_detailed_timing));
+ /* monitor range */
+ memcpy_far(get_global_seg(), &(BochsEDID.desc[1].mrld), get_global_seg(), &edid_range_limit,
+ sizeof(edid_range_limit));
+ /* serial */
+ memcpy_far(get_global_seg(), &(BochsEDID.desc[2]), get_global_seg(), &edid_serial,
+ sizeof (struct edid_monitor_text));
+ /* monitor name */
+ memcpy_far(get_global_seg(), &(BochsEDID.desc[3]), get_global_seg(), &edid_name,
+ sizeof (struct edid_monitor_text));
+
+ SET_VGA(BochsEDID.extensions, next);
+ u8 sum = -checksum_far(get_global_seg(), &BochsEDID, sizeof(BochsEDID));
+ SET_VGA(BochsEDID.checksum, sum);
+}
+
+int bochs_read_edid_block0(u16 unit, u16 block, u16 seg, void *data)
+{
+ memcpy_far(seg, data, get_global_seg(), &BochsEDID, sizeof(BochsEDID));
+ return 0;
+}
+
+int bochs_get_ddc_capabilities(u16 unit)
+{
+ if (unit != 0)
+ return -1;
+
+ return (1 << 8) | VBE_DDC1_PROTOCOL_SUPPORTED;
+}
+
+int bochs_read_edid(u16 unit, u16 block, u16 seg, void *data)
+{
+ if (unit != 0 || block != 0)
+ return -1;
+
+ return bochs_read_edid_block0(unit, block, seg, data);
+}
diff --git a/vgasrc/bochsedid.h b/vgasrc/bochsedid.h
new file mode 100644
index 0000000..b6b2e3a
--- /dev/null
+++ b/vgasrc/bochsedid.h
@@ -0,0 +1,137 @@
+#ifndef __BOCHEDID_H
+#define __BOCHEDID_H
+
+/* EDID infomation definitions */
+/* Detailed Timing Descriptor */
+struct edid_detailed_timing {
+ u16 pixel_clock;
+ u8 horizontal_addressable_low;
+ u8 horizontal_blanking_low;
+ u8 horizontal_high;
+ u8 vertical_addressable_low;
+ u8 vertical_blanking_low;
+ u8 vertical_high;
+ u8 horizontal_front_porch_low;
+ u8 horizontal_sync_pulse_low;
+ u8 vertical_low4;
+ u8 horizontal_vertical_sync_hi;
+ u8 horizontal_video_image_low;
+ u8 vertical_video_image_low;
+ u8 video_image_high;
+ u8 horizontal_border;
+ u8 vertical_border;
+ u8 features;
+} PACKED;
+
+/* Other Monitor Descriptors */
+/*
+ 0xFF: Monitor serial number (text)
+ 0xFE: Unspecified text (text)
+ 0xFC: Monitor name (text)
+ */
+struct edid_monitor_text {
+ u8 header[5];
+ u8 text[13];
+} PACKED;
+
+/* Monitor Range Limits Descriptor */
+/*
+ 0xFD: Monitor range limits. 6- or 13-byte binary descriptor.
+ */
+struct edid_monitor_range_limit {
+ u8 header[5];
+ u8 vertical_rate_min;
+ u8 vertical_rate_max;
+ u8 horizontal_rate_min;
+ u8 horizontal_rate_max;
+ u8 pixel_clock_max;
+ u8 extended_timing_type;
+ u8 reserved;
+ u8 start_frequency;
+ u8 gtf_c_val;
+ u16 gtf_m_val;
+ u8 gtf_k_val;
+ u8 gtf_j_val;
+} PACKED;
+
+/* White point Descriptor */
+/*
+ 0xFB: Additional white point data. 2ÃÂ 5-byte descriptors, padded with 0A 20 20.
+ 0xFA: Additional standard timing identifiers. 6ÃÂ 2-byte descriptors, padded with 0A
+ */
+struct edid_wp_desc {
+ u8 index;
+ u8 least;
+ u8 x;
+ u8 y;
+ u8 gamma;
+} PACKED;
+
+struct edid_white_point {
+ u8 header[5];
+ struct edid_wp_desc desc[2];
+ u8 padding[3];
+} PACKED;
+
+struct edid_additional_timing {
+ u8 header[5];
+ u16 standard_timing[6];
+ u8 padding;
+} PACKED;
+
+union edid_descriptors {
+ struct edid_detailed_timing dtd;
+ struct edid_monitor_range_limit mrld;
+ struct edid_monitor_text mtxtd;
+ struct edid_white_point wpd;
+ struct edid_additional_timing astd;
+} PACKED;
+
+struct edid_info {
+ u8 header[8];
+ u16 vendor;
+ u16 product;
+ u32 serial;
+ u8 week;
+ u8 year;
+ u8 major_version;
+ u8 minor_version;
+ u8 video_setup;
+ u8 screen_width;
+ u8 screen_height;
+ u8 gamma;
+ u8 feature_flag;
+ u8 least_chromaticity[2];
+ u8 most_chromaticity[8];
+ u8 established_timing[3];
+ u16 standard_timing[8];
+ union edid_descriptors desc[4];
+ u8 extensions;
+ u8 checksum;
+} PACKED;
+
+/* EDID Standard Timing Description */
+
+/* First byte: X resolution, divided by 8, less 31 (256âÂÂ2288 pixels) */
+/* bit 7-6, X:Y pixel ratio: 00=16:10; 01=4:3; 10=5:4; 11=16:9 */
+/* bit 5-0, Vertical frequency, less 60 (60âÂÂ123 Hz), nop 01 01 in Big Endian*/
+#define EDID_STD_640x480_85Hz 0x5931
+#define EDID_STD_800x600_85Hz 0x5945
+#define EDID_STD_1024x768_85Hz 0x5961
+#define EDID_STD_1152x864_70Hz 0x4A71
+#define EDID_STD_1280x720_70Hz 0xCA81
+#define EDID_STD_1280x800_70Hz 0x0A81
+#define EDID_STD_1280x960_60Hz 0x4081
+#define EDID_STD_1280x1024_60Hz 0x8081
+#define EDID_STD_1440x900_60Hz 0x0095
+#define EDID_STD_1600x1200_60Hz 0x40A9
+#define EDID_STD_1600x900_60Hz 0xC0A9
+#define EDID_STD_1680x1050_60Hz 0x00B3
+#define EDID_STD_1920x1080_60Hz 0xC0D1
+#define EDID_STD_1920x1200_60Hz 0x00D1
+#define EDID_STD_NOP 0x0101
+
+void bochs_pupulate_edid_block0(u8 next);
+int bochs_get_ddc_capabilities(u16 unit);
+int bochs_read_edid(u16 unit, u16 block, u16 seg, void *data);
+#endif /* bochedid.h */
diff --git a/vgasrc/bochsvga.c b/vgasrc/bochsvga.c
index 2a8aeb1..7b8f430 100644
--- a/vgasrc/bochsvga.c
+++ b/vgasrc/bochsvga.c
@@ -388,6 +388,7 @@ bochsvga_init(void)
SET_VGA(m->mode, 0xffff);
}
}
+ bochs_pupulate_edid_block0(0);
return 0;
}
diff --git a/vgasrc/vgahw.h b/vgasrc/vgahw.h
index 01d2609..130462c 100644
--- a/vgasrc/vgahw.h
+++ b/vgasrc/vgahw.h
@@ -8,6 +8,7 @@
#include "bochsvga.h" // bochsvga_set_mode
#include "stdvga.h" // stdvga_set_mode
#include "geodevga.h" // geodevga_init
+#include "bochsedid.h"
static inline struct vgamode_s *vgahw_find_mode(int mode) {
if (CONFIG_VGA_CIRRUS)
@@ -130,10 +131,14 @@ static inline int vgahw_restore_state(u16 seg, void *data, int states) {
}
static inline int vgahw_get_ddc_capabilities(u16 unit) {
+ if (CONFIG_VGA_BOCHS)
+ return bochs_get_ddc_capabilities(unit);
return stdvga_get_ddc_capabilities(unit);
}
static inline int vgahw_read_edid(u16 unit, u16 block, u16 seg, void *data) {
+ if (CONFIG_VGA_BOCHS)
+ return bochs_read_edid(unit, block, seg, data);
return stdvga_read_edid(unit, block, seg, data);
}
--
1.7.9.5
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