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ACRN:DM:VGPU: Fix the incorrect offset for EDID detailed_timing_block

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The EDID uses the bytes of 54-125 to define the four detailed_timing_blocks.
But the static offset is used to update the DTB. This will cause that
the incorrect offset is used for DTB if the edid_generate is called several
times.

Tracked-On: #7376

Acked-by: Wang Yu <yu1.wang@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
This commit is contained in:
Zhao Yakui 2022-05-06 11:26:47 +08:00 committed by acrnsi-robot
parent 9aa373aa3a
commit 4972d29c2d
1 changed files with 10 additions and 11 deletions
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21
devicemodel/hw/vdisplay_sdl.c
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@ -353,22 +353,17 @@ vdpy_edid_set_dtd(uint8_t *dtd, const frame_param *frame)
}
static void
vdpy_edid_set_descripter(uint8_t *edid, uint8_t is_dtd,
vdpy_edid_set_descripter(uint8_t *desc, uint8_t is_dtd,
uint8_t tag, const base_param *b_param)
{
static uint8_t offset;
uint8_t *desc;
frame_param frame;
const char* text;
uint16_t len;
offset = 54;
desc = edid + offset;
if (is_dtd) {
vdpy_edid_set_frame(&frame, b_param);
vdpy_edid_set_dtd(desc, &frame);
offset += 18;
return;
}
desc[3] = tag;
@ -408,7 +403,6 @@ vdpy_edid_set_descripter(uint8_t *edid, uint8_t is_dtd,
default:
break;
}
offset += 18;
}
static uint8_t
@ -431,6 +425,7 @@ vdpy_edid_generate(uint8_t *edid, size_t size, struct edid_info *info)
uint16_t id_manuf;
uint16_t id_product;
uint32_t serial;
uint8_t *desc;
base_param b_param, c_param;
vdpy_edid_set_baseparam(&b_param, info->prefx, info->prefy);
@ -496,15 +491,19 @@ vdpy_edid_generate(uint8_t *edid, size_t size, struct edid_info *info)
/* edid[125:54], Detailed Timing Descriptor - 18 bytes x 4 */
// Detailed Timing Descriptor 1
desc = edid + 54;
vdpy_edid_set_baseparam(&c_param, VDPY_MAX_WIDTH, VDPY_MAX_HEIGHT);
vdpy_edid_set_descripter(edid, 0x1, 0, &c_param);
vdpy_edid_set_descripter(desc, 0x1, 0, &c_param);
// Detailed Timing Descriptor 2
desc += 18;
vdpy_edid_set_baseparam(&c_param, VDPY_DEFAULT_WIDTH, VDPY_DEFAULT_HEIGHT);
vdpy_edid_set_descripter(edid, 0x1, 0, &c_param);
vdpy_edid_set_descripter(desc, 0x1, 0, &c_param);
// Display Product Name (ASCII) String Descriptor (tag #FCh)
vdpy_edid_set_descripter(edid, 0, 0xfc, &b_param);
desc += 18;
vdpy_edid_set_descripter(desc, 0, 0xfc, &b_param);
// Display Product Serial Number Descriptor (tag #FFh)
vdpy_edid_set_descripter(edid, 0, 0xff, &b_param);
desc += 18;
vdpy_edid_set_descripter(desc, 0, 0xff, &b_param);
/* EDID[126], Extension Block Count */
edid[126] = 0; // no Extension Block