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gop: Use EDID only if of better resolution than preset

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This commit is contained in:
mintsuki 2022-05-22 07:17:26 +02:00
parent b11b21dfb0
commit f77b1f803b
1 changed files with 32 additions and 21 deletions
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53
common/drivers/gop.c
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@ -126,6 +126,7 @@ static bool try_mode(struct fb_info *ret, size_t mode, uint64_t width, uint64_t
#define INVALID_PRESET_MODE 0xffffffff
static no_unwind size_t preset_mode = INVALID_PRESET_MODE;
static no_unwind EFI_GRAPHICS_OUTPUT_MODE_INFORMATION preset_mode_info;
bool init_gop(struct fb_info *ret,
uint64_t target_width, uint64_t target_height, uint16_t target_bpp) {
@ -146,19 +147,26 @@ bool init_gop(struct fb_info *ret,
if (status == EFI_NOT_STARTED) {
status = gop->SetMode(gop, 0);
if (status) {
panic(false, "gop: Initialisation failed");
}
}
status = gop->QueryMode(gop, gop->Mode->Mode, &mode_info_size, &mode_info);
if (status) {
panic(false, "gop: Initialisation failed");
}
if (preset_mode == INVALID_PRESET_MODE) {
preset_mode = gop->Mode->Mode;
memcpy(&preset_mode_info, mode_info, mode_info_size);
current_video_mode = preset_mode;
}
struct resolution fallback_resolutions[] = {
{ 0, 0, 0 }, // Overridden by preset mode
{ 0, 0, 0 }, // Overridden by EDID
{ 0, 0, 0 }, // Overridden by preset
{ 1024, 768, 32 },
{ 800, 600, 32 },
{ 640, 480, 32 },
@ -175,23 +183,6 @@ bool init_gop(struct fb_info *ret,
size_t current_fallback = 0;
if (!target_width || !target_height || !target_bpp) {
ret->default_res = true;
struct edid_info_struct *edid_info = get_edid_info();
if (edid_info != NULL) {
int edid_width = (int)edid_info->det_timing_desc1[2];
edid_width += ((int)edid_info->det_timing_desc1[4] & 0xf0) << 4;
int edid_height = (int)edid_info->det_timing_desc1[5];
edid_height += ((int)edid_info->det_timing_desc1[7] & 0xf0) << 4;
if (edid_width && edid_height) {
target_width = edid_width;
target_height = edid_height;
target_bpp = 32;
printv("gop: EDID detected screen resolution of %ux%u\n",
target_width, target_height);
goto retry;
}
}
goto fallback;
} else {
printv("gop: Requested resolution of %ux%ux%u\n",
@ -208,17 +199,37 @@ fallback:
ret->default_res = true;
if (current_fallback == 0) {
current_fallback++;
struct edid_info_struct *edid_info = get_edid_info();
if (edid_info != NULL) {
uint64_t edid_width = (uint64_t)edid_info->det_timing_desc1[2];
edid_width += ((uint64_t)edid_info->det_timing_desc1[4] & 0xf0) << 4;
uint64_t edid_height = (uint64_t)edid_info->det_timing_desc1[5];
edid_height += ((uint64_t)edid_info->det_timing_desc1[7] & 0xf0) << 4;
if (edid_width >= preset_mode_info.HorizontalResolution
&& edid_height >= preset_mode_info.VerticalResolution) {
target_width = edid_width;
target_height = edid_height;
target_bpp = 32;
goto retry;
}
}
}
if (current_fallback == 1) {
current_fallback++;
if (try_mode(ret, preset_mode, 0, 0, 0))
return true;
current_fallback++;
}
if (current_fallback < SIZEOF_ARRAY(fallback_resolutions)) {
current_fallback++;
target_width = fallback_resolutions[current_fallback].width;
target_height = fallback_resolutions[current_fallback].height;
target_bpp = fallback_resolutions[current_fallback].bpp;
current_fallback++;
goto retry;
}