edid: Change static variables to auto variables.
To support parsing multiple EDID blobs, the static "decode results" flags should
be changed to auto variables inside decode_edid.
This is done by packaging static variables into a structure inside decode_edid.
We also revised some functions (manufacturer_name, do_checksum) to avoid
accessing global variables directly. Extension (and detail block) parsing may
need to access and return all parsed context so we pass the whole structure to
it.
BRANCH=none
BUG=none
TEST=emerge-nyan coreboot chromeos-bootimage
# See EDID parsed correctly on Nyan.
Original-Change-Id: Ieca93d446bacf655c145dffdfa6cc6f5dc87ac26
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/195372
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit ed45909df24c05a0cb8b2ff662fdd2d7a39012f0)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I17cdfa770181a6eaac9d1050d340c8e052572b4a
Reviewed-on: http://review.coreboot.org/7834
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Hung-Te Lin
Marc Jones
parent
226db05a15
commit
1c8ee21fd3
382
src/lib/edid.c
382
src/lib/edid.c
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@ -39,35 +39,35 @@
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#include <boot/coreboot_tables.h>
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#include <vbe.h>
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static int claims_one_point_oh = 0;
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static int claims_one_point_two = 0;
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static int claims_one_point_three = 0;
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static int claims_one_point_four = 0;
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static int nonconformant_digital_display = 0;
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static int nonconformant_extension = 0;
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static int did_detailed_timing = 0;
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static int has_name_descriptor = 0;
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static int has_range_descriptor = 0;
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static int has_preferred_timing = 0;
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static int has_valid_checksum = 0;
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static int has_valid_cvt = 1;
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static int has_valid_dummy_block = 1;
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static int has_valid_week = 0;
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static int has_valid_year = 0;
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static int has_valid_detailed_blocks = 0;
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static int has_valid_extension_count = 0;
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static int has_valid_descriptor_ordering = 1;
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static int has_valid_descriptor_pad = 1;
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static int has_valid_range_descriptor = 1;
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static int has_valid_max_dotclock = 1;
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static int has_valid_string_termination = 1;
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static int manufacturer_name_well_formed = 0;
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static int seen_non_detailed_descriptor = 0;
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static int warning_excessive_dotclock_correction = 0;
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static int warning_zero_preferred_refresh = 0;
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static int conformant = 1;
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struct edid_context {
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int claims_one_point_oh;
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int claims_one_point_two;
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int claims_one_point_three;
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int claims_one_point_four;
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int nonconformant_digital_display;
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int nonconformant_extension;
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int did_detailed_timing;
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int has_name_descriptor;
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int has_range_descriptor;
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int has_preferred_timing;
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int has_valid_checksum;
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int has_valid_cvt;
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int has_valid_dummy_block;
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int has_valid_week;
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int has_valid_year;
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int has_valid_detailed_blocks;
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int has_valid_extension_count;
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int has_valid_descriptor_ordering;
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int has_valid_descriptor_pad;
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int has_valid_range_descriptor;
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int has_valid_max_dotclock;
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int has_valid_string_termination;
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int manufacturer_name_well_formed;
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int seen_non_detailed_descriptor;
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int warning_excessive_dotclock_correction;
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int warning_zero_preferred_refresh;
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int conformant;
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};
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static int vbe_valid;
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static struct lb_framebuffer edid_fb;
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@ -82,9 +82,9 @@ static char *manufacturer_name(struct edid *out, unsigned char *x)
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if (isupper(out->manuf_name[0]) &&
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isupper(out->manuf_name[1]) &&
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isupper(out->manuf_name[2]))
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manufacturer_name_well_formed = 1;
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return out->manuf_name;
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return out->manuf_name;
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return NULL;
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}
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static int
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@ -175,7 +175,8 @@ extract_string(unsigned char *x, int *valid_termination, int len)
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/* 1 means valid data */
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static int
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detailed_block(struct edid *out, unsigned char *x, int in_extension)
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detailed_block(struct edid *out, unsigned char *x, int in_extension,
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struct edid_context *c)
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{
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int i;
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#if 1
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@ -191,16 +192,16 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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/* 1.3, 3.10.3 */
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printk(BIOS_SPEW, "Monitor descriptor block has byte 2 nonzero (0x%02x)\n",
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x[2]);
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has_valid_descriptor_pad = 0;
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c->has_valid_descriptor_pad = 0;
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}
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if (x[3] != 0xfd && x[4] != 0x00) {
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/* 1.3, 3.10.3 */
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printk(BIOS_SPEW, "Monitor descriptor block has byte 4 nonzero (0x%02x)\n",
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x[4]);
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has_valid_descriptor_pad = 0;
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c->has_valid_descriptor_pad = 0;
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}
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seen_non_detailed_descriptor = 1;
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c->seen_non_detailed_descriptor = 1;
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if (x[3] <= 0xF) {
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/*
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* in principle we can decode these, if we know what they are.
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@ -215,7 +216,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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printk(BIOS_SPEW, "Dummy block\n");
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for (i = 5; i < 18; i++)
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if (x[i] != 0x00)
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has_valid_dummy_block = 0;
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c->has_valid_dummy_block = 0;
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return 1;
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case 0xF7:
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/* TODO */
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@ -226,12 +227,12 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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int valid_cvt = 1; /* just this block */
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printk(BIOS_SPEW, "CVT 3-byte code descriptor:\n");
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if (x[5] != 0x01) {
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has_valid_cvt = 0;
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c->has_valid_cvt = 0;
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return 0;
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}
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for (i = 0; i < 4; i++)
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valid_cvt &= detailed_cvt_descriptor(out, x + 6 + (i * 3), (i == 0));
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has_valid_cvt &= valid_cvt;
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c->has_valid_cvt &= valid_cvt;
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return 1;
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}
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case 0xF9:
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@ -249,7 +250,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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case 0xFC:
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printk(BIOS_SPEW, "Monitor name: %s\n",
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extract_string(x + 5,
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&has_valid_string_termination,
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&c->has_valid_string_termination,
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13));
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return 1;
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case 0xFD:
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@ -257,13 +258,13 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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int h_max_offset = 0, h_min_offset = 0;
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int v_max_offset = 0, v_min_offset = 0;
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int is_cvt = 0;
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has_range_descriptor = 1;
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c->has_range_descriptor = 1;
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out->range_class = "";
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/*
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* XXX todo: implement feature flags, vtd blocks
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* XXX check: ranges are well-formed; block termination if no vtd
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*/
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if (claims_one_point_four) {
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if (c->claims_one_point_four) {
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if (x[4] & 0x02) {
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v_max_offset = 255;
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if (x[4] & 0x01) {
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@ -277,7 +278,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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}
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}
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} else if (x[4]) {
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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}
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/*
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@ -289,8 +290,8 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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break;
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case 0x01: /* range limits only */
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out->range_class = "bare limits";
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if (!claims_one_point_four)
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has_valid_range_descriptor = 0;
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if (!c->claims_one_point_four)
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c->has_valid_range_descriptor = 0;
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break;
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case 0x02: /* secondary gtf curve */
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out->range_class = "GTF with icing";
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@ -298,19 +299,19 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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case 0x04: /* cvt */
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out->range_class = "CVT";
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is_cvt = 1;
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if (!claims_one_point_four)
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has_valid_range_descriptor = 0;
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if (!c->claims_one_point_four)
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c->has_valid_range_descriptor = 0;
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break;
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default: /* invalid */
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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out->range_class = "invalid";
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break;
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}
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if (x[5] + v_min_offset > x[6] + v_max_offset)
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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if (x[7] + h_min_offset > x[8] + h_max_offset)
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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printk(BIOS_SPEW, "Monitor ranges (%s): %d-%dHz V, %d-%dkHz H",
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out->range_class,
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x[5] + v_min_offset, x[6] + v_max_offset,
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@ -318,8 +319,8 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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if (x[9])
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printk(BIOS_SPEW, ", max dotclock %dMHz\n", x[9] * 10);
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else {
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if (claims_one_point_four)
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has_valid_max_dotclock = 0;
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if (c->claims_one_point_four)
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c->has_valid_max_dotclock = 0;
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printk(BIOS_SPEW, "\n");
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}
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@ -333,7 +334,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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printk(BIOS_SPEW, "Real max dotclock: %dKHz\n",
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(x[9] * 10000) - (raw_offset * 250));
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if (raw_offset >= 40)
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warning_excessive_dotclock_correction = 1;
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c->warning_excessive_dotclock_correction = 1;
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}
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max_h_pixels = x[12] & 0x03;
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@ -350,7 +351,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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x[14] & 0x10 ? "5:4" : "",
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x[14] & 0x08 ? "15:9" : "");
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if (x[14] & 0x07)
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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printk(BIOS_SPEW, "Preferred aspect ratio: ");
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switch((x[15] & 0xe0) >> 5) {
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@ -369,7 +370,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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printk(BIOS_SPEW, "Supports CVT reduced blanking\n");
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if (x[15] & 0x07)
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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if (x[16] & 0xf0) {
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printk(BIOS_SPEW, "Supported display scaling:\n");
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@ -384,12 +385,12 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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}
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if (x[16] & 0x0f)
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has_valid_range_descriptor = 0;
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c->has_valid_range_descriptor = 0;
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if (x[17])
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printk(BIOS_SPEW, "Preferred vertical refresh: %d Hz\n", x[17]);
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else
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warning_zero_preferred_refresh = 1;
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c->warning_zero_preferred_refresh = 1;
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}
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/*
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@ -404,11 +405,11 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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* seems to be specified by SPWG: http://www.spwg.org/
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*/
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printk(BIOS_SPEW, "ASCII string: %s\n",
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extract_string(x + 5, &has_valid_string_termination, 13));
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extract_string(x + 5, &c->has_valid_string_termination, 13));
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return 1;
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case 0xFF:
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printk(BIOS_SPEW, "Serial number: %s\n",
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extract_string(x + 5, &has_valid_string_termination, 13));
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extract_string(x + 5, &c->has_valid_string_termination, 13));
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return 1;
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default:
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printk(BIOS_SPEW, "Unknown monitor description type %d\n", x[3]);
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@ -416,11 +417,11 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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}
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}
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if (seen_non_detailed_descriptor && !in_extension) {
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has_valid_descriptor_ordering = 0;
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if (c->seen_non_detailed_descriptor && !in_extension) {
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c->has_valid_descriptor_ordering = 0;
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}
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if (! did_detailed_timing){
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if (! c->did_detailed_timing){
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/* Edid contains pixel clock in terms of 10KHz */
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out->pixel_clock = (x[0] + (x[1] << 8)) * 10;
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out->x_mm = (x[12] + ((x[14] & 0xF0) << 4));
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@ -461,7 +462,7 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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64);
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printk(BIOS_SPEW, "Did detailed timing\n");
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}
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did_detailed_timing = 1;
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c->did_detailed_timing = 1;
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switch ((x[17] & 0x18) >> 3) {
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case 0x00:
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out->syncmethod = " analog composite";
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@ -523,22 +524,22 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension)
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static int
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do_checksum(unsigned char *x)
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{
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printk(BIOS_SPEW, "Checksum: 0x%hhx", x[0x7f]);
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int valid = 0;
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printk(BIOS_SPEW, "Checksum: 0x%hx", x[0x7f]);
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{
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unsigned char sum = 0;
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int i;
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for (i = 0; i < 128; i++)
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sum += x[i];
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if (sum) {
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printk(BIOS_SPEW, " (should be 0x%hhx)", (unsigned char)(x[0x7f] - sum));
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has_valid_checksum = 0;
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printk(BIOS_SPEW, " (should be 0x%hx)", (unsigned char)(x[0x7f] - sum));
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} else {
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has_valid_checksum = 1;
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valid = 1;
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printk(BIOS_SPEW, " (valid)");
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}
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}
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printk(BIOS_SPEW, "\n");
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return has_valid_checksum;
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return valid;
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}
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/* CEA extension */
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@ -812,7 +813,7 @@ cea_block(struct edid *out, unsigned char *x)
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}
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static int
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parse_cea(struct edid *out, unsigned char *x)
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parse_cea(struct edid *out, unsigned char *x, struct edid_context *c)
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{
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int ret = 0;
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int version = x[1];
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@ -852,11 +853,10 @@ parse_cea(struct edid *out, unsigned char *x)
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for (detailed = x + offset; detailed + 18 < x + 127; detailed += 18)
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if (detailed[0])
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detailed_block(out, detailed, 1);
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detailed_block(out, detailed, 1, c);
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} while (0);
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do_checksum(x);
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c->has_valid_checksum &= do_checksum(x);
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return ret;
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}
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@ -869,7 +869,7 @@ extension_version(struct edid *out, unsigned char *x)
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}
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static int
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parse_extension(struct edid *out, unsigned char *x)
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parse_extension(struct edid *out, unsigned char *x, struct edid_context *c)
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{
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int conformant_extension = 0;
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printk(BIOS_SPEW, "\n");
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@ -878,14 +878,14 @@ parse_extension(struct edid *out, unsigned char *x)
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case 0x02:
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printk(BIOS_SPEW, "CEA extension block\n");
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extension_version(out, x);
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conformant_extension = parse_cea(out, x);
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conformant_extension = parse_cea(out, x, c);
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break;
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case 0x10: printk(BIOS_SPEW, "VTB extension block\n"); break;
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case 0x40: printk(BIOS_SPEW, "DI extension block\n"); break;
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case 0x50: printk(BIOS_SPEW, "LS extension block\n"); break;
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case 0x60: printk(BIOS_SPEW, "DPVL extension block\n"); break;
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case 0xF0: printk(BIOS_SPEW, "Block map\n"); break;
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case 0xFF: printk(BIOS_SPEW, "Manufacturer-specific extension block\n"); break;
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case 0xFF: printk(BIOS_SPEW, "Manufacturer-specific extension block\n");
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default:
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printk(BIOS_SPEW, "Unknown extension block\n");
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break;
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@ -964,6 +964,16 @@ static void dump_breakdown(unsigned char *edid)
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int decode_edid(unsigned char *edid, int size, struct edid *out)
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{
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int analog, i;
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struct edid_context c = {
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.has_valid_cvt = 1,
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.has_valid_dummy_block = 1,
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.has_valid_descriptor_ordering = 1,
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.has_valid_descriptor_pad = 1,
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.has_valid_range_descriptor = 1,
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.has_valid_max_dotclock = 1,
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.has_valid_string_termination = 1,
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.conformant = 1,
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};
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dump_breakdown(edid);
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@ -971,8 +981,11 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
printk(BIOS_SPEW, "No header found\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
memset(out, 0, sizeof(*out));
|
||||
manufacturer_name(out, edid + 0x08);
|
||||
if (manufacturer_name(out, edid + 0x08))
|
||||
c.manufacturer_name_well_formed = 1;
|
||||
|
||||
out->model = (unsigned short)(edid[0x0A] + (edid[0x0B] << 8));
|
||||
out->serial = (unsigned int)(edid[0x0C] + (edid[0x0D] << 8)
|
||||
+ (edid[0x0E] << 16) + (edid[0x0F] << 24));
|
||||
|
|
@ -985,19 +998,19 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
/* XXX need manufacturer ID table */
|
||||
|
||||
if (edid[0x10] < 55 || edid[0x10] == 0xff) {
|
||||
has_valid_week = 1;
|
||||
c.has_valid_week = 1;
|
||||
if (edid[0x11] > 0x0f) {
|
||||
if (edid[0x10] == 0xff) {
|
||||
has_valid_year = 1;
|
||||
printk(BIOS_SPEW, "Made week %hhu of model year %hhu\n", edid[0x10],
|
||||
c.has_valid_year = 1;
|
||||
printk(BIOS_SPEW, "Made week %hd of model year %hd\n", edid[0x10],
|
||||
edid[0x11]);
|
||||
out->week = edid[0x10];
|
||||
out->year = edid[0x11];
|
||||
} else {
|
||||
/* we know it's at least 2013, when this code was written */
|
||||
if (edid[0x11] + 90 <= 2013) {
|
||||
has_valid_year = 1;
|
||||
printk(BIOS_SPEW, "Made week %hhu of %d\n",
|
||||
c.has_valid_year = 1;
|
||||
printk(BIOS_SPEW, "Made week %hd of %hd\n",
|
||||
edid[0x10], edid[0x11] + 1990);
|
||||
out->week = edid[0x10];
|
||||
out->year = edid[0x11] + 1990;
|
||||
|
|
@ -1006,8 +1019,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
printk(BIOS_SPEW, "EDID version: %hhu.%hhu\n", edid[0x12], edid[0x13]);
|
||||
printk(BIOS_SPEW, "EDID version: %hd.%hd\n", edid[0x12], edid[0x13]);
|
||||
out->version[0] = edid[0x12];
|
||||
out->version[1] = edid[0x13];
|
||||
|
||||
|
|
@ -1018,29 +1030,28 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
}
|
||||
switch (edid[0x13]) {
|
||||
case 4:
|
||||
claims_one_point_four = 1;
|
||||
c.claims_one_point_four = 1;
|
||||
case 3:
|
||||
claims_one_point_three = 1;
|
||||
c.claims_one_point_three = 1;
|
||||
case 2:
|
||||
claims_one_point_two = 1;
|
||||
c.claims_one_point_two = 1;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
claims_one_point_oh = 1;
|
||||
c.claims_one_point_oh = 1;
|
||||
}
|
||||
|
||||
/* display section */
|
||||
|
||||
if (edid[0x14] & 0x80) {
|
||||
int conformance_mask;
|
||||
analog = 0;
|
||||
printk(BIOS_SPEW, "Digital display\n");
|
||||
if (claims_one_point_four) {
|
||||
if (c.claims_one_point_four) {
|
||||
conformance_mask = 0;
|
||||
if ((edid[0x14] & 0x70) == 0x00)
|
||||
printk(BIOS_SPEW, "Color depth is undefined\n");
|
||||
else if ((edid[0x14] & 0x70) == 0x70)
|
||||
nonconformant_digital_display = 1;
|
||||
c.nonconformant_digital_display = 1;
|
||||
else
|
||||
printk(BIOS_SPEW, "%d bits per primary color channel\n",
|
||||
((edid[0x14] & 0x70) >> 3) + 4);
|
||||
|
|
@ -1055,10 +1066,10 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
case 0x04: printk(BIOS_SPEW, "MDDI interface\n"); break;
|
||||
case 0x05: printk(BIOS_SPEW, "DisplayPort interface\n"); break;
|
||||
default:
|
||||
nonconformant_digital_display = 1;
|
||||
c.nonconformant_digital_display = 1;
|
||||
}
|
||||
out->type = edid[0x14] & 0x0f;
|
||||
} else if (claims_one_point_two) {
|
||||
} else if (c.claims_one_point_two) {
|
||||
conformance_mask = 0x7E;
|
||||
if (edid[0x14] & 0x01) {
|
||||
printk(BIOS_SPEW, "DFP 1.x compatible TMDS\n");
|
||||
|
|
@ -1066,9 +1077,9 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
} else
|
||||
conformance_mask = 0x7F;
|
||||
|
||||
if (!nonconformant_digital_display)
|
||||
nonconformant_digital_display = edid[0x14] & conformance_mask;
|
||||
out->nonconformant = nonconformant_digital_display;
|
||||
if (!c.nonconformant_digital_display)
|
||||
c.nonconformant_digital_display = edid[0x14] & conformance_mask;
|
||||
out->nonconformant = c.nonconformant_digital_display;
|
||||
} else {
|
||||
analog = 1;
|
||||
int voltage = (edid[0x14] & 0x60) >> 5;
|
||||
|
|
@ -1082,7 +1093,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
voltage == 1 ? "0.714/0.286" :
|
||||
"0.7/0.3");
|
||||
|
||||
if (claims_one_point_four) {
|
||||
if (c.claims_one_point_four) {
|
||||
if (edid[0x14] & 0x10)
|
||||
printk(BIOS_SPEW, "Blank-to-black setup/pedestal\n");
|
||||
else
|
||||
|
|
@ -1108,7 +1119,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
edid[0x15], edid[0x16]);
|
||||
out->xsize_cm = edid[0x15];
|
||||
out->ysize_cm = edid[0x16];
|
||||
} else if (claims_one_point_four && (edid[0x15] || edid[0x16])) {
|
||||
} else if (c.claims_one_point_four && (edid[0x15] || edid[0x16])) {
|
||||
if (edid[0x15]) { /* edid[0x15] != 0 && edid[0x16] == 0 */
|
||||
unsigned int ratio = 100000/(edid[0x15] + 99);
|
||||
printk(BIOS_SPEW, "Aspect ratio is %u.%03u (landscape)\n",
|
||||
|
|
@ -1126,7 +1137,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
}
|
||||
|
||||
if (edid[0x17] == 0xff) {
|
||||
if (claims_one_point_four)
|
||||
if (c.claims_one_point_four)
|
||||
printk(BIOS_SPEW, "Gamma is defined in an extension block\n");
|
||||
else
|
||||
/* XXX Technically 1.3 doesn't say this... */
|
||||
|
|
@ -1162,7 +1173,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
printk(BIOS_SPEW, "Default (sRGB) color space is primary color space\n");
|
||||
if (edid[0x18] & 0x02) {
|
||||
printk(BIOS_SPEW, "First detailed timing is preferred timing\n");
|
||||
has_preferred_timing = 1;
|
||||
c.has_preferred_timing = 1;
|
||||
}
|
||||
if (edid[0x18] & 0x01)
|
||||
printk(BIOS_SPEW, "Supports GTF timings within operating range\n");
|
||||
|
|
@ -1195,7 +1206,7 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
x = (b1 + 31) * 8;
|
||||
switch ((b2 >> 6) & 0x3) {
|
||||
case 0x00:
|
||||
if (claims_one_point_three)
|
||||
if (c.claims_one_point_three)
|
||||
y = x * 10 / 16;
|
||||
else
|
||||
y = x;
|
||||
|
|
@ -1217,25 +1228,28 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
|
||||
/* detailed timings */
|
||||
printk(BIOS_SPEW, "Detailed timings\n");
|
||||
has_valid_detailed_blocks = detailed_block(out, edid + 0x36, 0);
|
||||
if (has_preferred_timing && !did_detailed_timing)
|
||||
has_preferred_timing = 0; /* not really accurate... */
|
||||
has_valid_detailed_blocks &= detailed_block(out, edid + 0x48, 0);
|
||||
has_valid_detailed_blocks &= detailed_block(out, edid + 0x5A, 0);
|
||||
has_valid_detailed_blocks &= detailed_block(out, edid + 0x6C, 0);
|
||||
for (i = 0; i < 4; i++) {
|
||||
c.has_valid_detailed_blocks &= detailed_block(
|
||||
out, edid + 0x36 + i * 18, 0, &c);
|
||||
if (i == 0 && c.has_preferred_timing && !c.did_detailed_timing)
|
||||
{
|
||||
/* not really accurate... */
|
||||
c.has_preferred_timing = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* check this, 1.4 verification guide says otherwise */
|
||||
if (edid[0x7e]) {
|
||||
printk(BIOS_SPEW, "Has %d extension blocks\n", edid[0x7e]);
|
||||
/* 2 is impossible because of the block map */
|
||||
if (edid[0x7e] != 2)
|
||||
has_valid_extension_count = 1;
|
||||
c.has_valid_extension_count = 1;
|
||||
} else {
|
||||
has_valid_extension_count = 1;
|
||||
c.has_valid_extension_count = 1;
|
||||
}
|
||||
|
||||
printk(BIOS_SPEW, "Checksum\n");
|
||||
do_checksum(edid);
|
||||
c.has_valid_checksum = do_checksum(edid);
|
||||
|
||||
/* EDID v2.0 has a larger blob (256 bytes) and may have some problem in
|
||||
* the extension parsing loop below. Since v2.0 was quickly deprecated
|
||||
|
|
@ -1243,38 +1257,32 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
* that case now and can fix it when we need to use a real 2.0 panel.
|
||||
*/
|
||||
for(i = 128; i < size; i += 128)
|
||||
nonconformant_extension += parse_extension(out, &edid[i]);
|
||||
/*
|
||||
* x = edid;
|
||||
* for (edid_lines /= 8; edid_lines > 1; edid_lines--) {
|
||||
* x += 128;
|
||||
* nonconformant_extension += parse_extension(x);
|
||||
* }
|
||||
*/
|
||||
c.nonconformant_extension +=
|
||||
parse_extension(out, &edid[i], &c);
|
||||
|
||||
if (claims_one_point_four) {
|
||||
if (nonconformant_digital_display ||
|
||||
!has_valid_string_termination ||
|
||||
!has_valid_descriptor_pad ||
|
||||
!has_preferred_timing)
|
||||
conformant = 0;
|
||||
if (!conformant)
|
||||
if (c.claims_one_point_four) {
|
||||
if (c.nonconformant_digital_display ||
|
||||
!c.has_valid_string_termination ||
|
||||
!c.has_valid_descriptor_pad ||
|
||||
!c.has_preferred_timing)
|
||||
c.conformant = 0;
|
||||
if (!c.conformant)
|
||||
printk(BIOS_ERR, "EDID block does NOT conform to EDID 1.4!\n");
|
||||
if (nonconformant_digital_display)
|
||||
if (c.nonconformant_digital_display)
|
||||
printk(BIOS_ERR, "\tDigital display field contains garbage: %x\n",
|
||||
nonconformant_digital_display);
|
||||
if (!has_valid_string_termination)
|
||||
c.nonconformant_digital_display);
|
||||
if (!c.has_valid_string_termination)
|
||||
printk(BIOS_ERR, "\tDetailed block string not properly terminated\n");
|
||||
if (!has_valid_descriptor_pad)
|
||||
if (!c.has_valid_descriptor_pad)
|
||||
printk(BIOS_ERR, "\tInvalid descriptor block padding\n");
|
||||
if (!has_preferred_timing)
|
||||
if (!c.has_preferred_timing)
|
||||
printk(BIOS_ERR, "\tMissing preferred timing\n");
|
||||
} else if (claims_one_point_three) {
|
||||
if (nonconformant_digital_display ||
|
||||
!has_valid_string_termination ||
|
||||
!has_valid_descriptor_pad ||
|
||||
!has_preferred_timing) {
|
||||
conformant = 0;
|
||||
} else if (c.claims_one_point_three) {
|
||||
if (c.nonconformant_digital_display ||
|
||||
!c.has_valid_string_termination ||
|
||||
!c.has_valid_descriptor_pad ||
|
||||
!c.has_preferred_timing) {
|
||||
c.conformant = 0;
|
||||
}
|
||||
/**
|
||||
* According to E-EDID (EDIDv1.3), has_name_descriptor and
|
||||
|
|
@ -1283,92 +1291,92 @@ int decode_edid(unsigned char *edid, int size, struct edid *out)
|
|||
* don't have them. As a workaround, we only print warning
|
||||
* messages.
|
||||
*/
|
||||
if (!conformant)
|
||||
if (!c.conformant)
|
||||
printk(BIOS_ERR, "EDID block does NOT conform to EDID 1.3!\n");
|
||||
else if (!has_name_descriptor || !has_range_descriptor)
|
||||
else if (!c.has_name_descriptor || !c.has_range_descriptor)
|
||||
printk(BIOS_WARNING, "WARNING: EDID block does NOT "
|
||||
"fully conform to EDID 1.3.\n");
|
||||
|
||||
if (nonconformant_digital_display)
|
||||
if (c.nonconformant_digital_display)
|
||||
printk(BIOS_ERR, "\tDigital display field contains garbage: %x\n",
|
||||
nonconformant_digital_display);
|
||||
if (!has_name_descriptor)
|
||||
c.nonconformant_digital_display);
|
||||
if (!c.has_name_descriptor)
|
||||
printk(BIOS_ERR, "\tMissing name descriptor\n");
|
||||
if (!has_preferred_timing)
|
||||
if (!c.has_preferred_timing)
|
||||
printk(BIOS_ERR, "\tMissing preferred timing\n");
|
||||
if (!has_range_descriptor)
|
||||
if (!c.has_range_descriptor)
|
||||
printk(BIOS_ERR, "\tMissing monitor ranges\n");
|
||||
if (!has_valid_descriptor_pad) /* Might be more than just 1.3 */
|
||||
if (!c.has_valid_descriptor_pad) /* Might be more than just 1.3 */
|
||||
printk(BIOS_ERR, "\tInvalid descriptor block padding\n");
|
||||
if (!has_valid_string_termination) /* Likewise */
|
||||
if (!c.has_valid_string_termination) /* Likewise */
|
||||
printk(BIOS_ERR, "\tDetailed block string not properly terminated\n");
|
||||
} else if (claims_one_point_two) {
|
||||
if (nonconformant_digital_display ||
|
||||
!has_valid_string_termination)
|
||||
conformant = 0;
|
||||
if (!conformant)
|
||||
} else if (c.claims_one_point_two) {
|
||||
if (c.nonconformant_digital_display ||
|
||||
!c.has_valid_string_termination)
|
||||
c.conformant = 0;
|
||||
if (!c.conformant)
|
||||
printk(BIOS_ERR, "EDID block does NOT conform to EDID 1.2!\n");
|
||||
if (nonconformant_digital_display)
|
||||
if (c.nonconformant_digital_display)
|
||||
printk(BIOS_ERR, "\tDigital display field contains garbage: %x\n",
|
||||
nonconformant_digital_display);
|
||||
if (!has_valid_string_termination)
|
||||
c.nonconformant_digital_display);
|
||||
if (!c.has_valid_string_termination)
|
||||
printk(BIOS_ERR, "\tDetailed block string not properly terminated\n");
|
||||
} else if (claims_one_point_oh) {
|
||||
if (seen_non_detailed_descriptor)
|
||||
conformant = 0;
|
||||
if (!conformant)
|
||||
} else if (c.claims_one_point_oh) {
|
||||
if (c.seen_non_detailed_descriptor)
|
||||
c.conformant = 0;
|
||||
if (!c.conformant)
|
||||
printk(BIOS_ERR, "EDID block does NOT conform to EDID 1.0!\n");
|
||||
if (seen_non_detailed_descriptor)
|
||||
if (c.seen_non_detailed_descriptor)
|
||||
printk(BIOS_ERR, "\tHas descriptor blocks other than detailed timings\n");
|
||||
}
|
||||
|
||||
if (nonconformant_extension ||
|
||||
!has_valid_checksum ||
|
||||
!has_valid_cvt ||
|
||||
!has_valid_year ||
|
||||
!has_valid_week ||
|
||||
!has_valid_detailed_blocks ||
|
||||
!has_valid_dummy_block ||
|
||||
!has_valid_extension_count ||
|
||||
!has_valid_descriptor_ordering ||
|
||||
!has_valid_range_descriptor ||
|
||||
!manufacturer_name_well_formed) {
|
||||
conformant = 0;
|
||||
if (c.nonconformant_extension ||
|
||||
!c.has_valid_checksum ||
|
||||
!c.has_valid_cvt ||
|
||||
!c.has_valid_year ||
|
||||
!c.has_valid_week ||
|
||||
!c.has_valid_detailed_blocks ||
|
||||
!c.has_valid_dummy_block ||
|
||||
!c.has_valid_extension_count ||
|
||||
!c.has_valid_descriptor_ordering ||
|
||||
!c.has_valid_range_descriptor ||
|
||||
!c.manufacturer_name_well_formed) {
|
||||
c.conformant = 0;
|
||||
printk(BIOS_ERR, "EDID block does not conform at all!\n");
|
||||
if (nonconformant_extension)
|
||||
if (c.nonconformant_extension)
|
||||
printk(BIOS_ERR, "\tHas %d nonconformant extension block(s)\n",
|
||||
nonconformant_extension);
|
||||
if (!has_valid_checksum)
|
||||
c.nonconformant_extension);
|
||||
if (!c.has_valid_checksum)
|
||||
printk(BIOS_ERR, "\tBlock has broken checksum\n");
|
||||
if (!has_valid_cvt)
|
||||
if (!c.has_valid_cvt)
|
||||
printk(BIOS_ERR, "\tBroken 3-byte CVT blocks\n");
|
||||
if (!has_valid_year)
|
||||
if (!c.has_valid_year)
|
||||
printk(BIOS_ERR, "\tBad year of manufacture\n");
|
||||
if (!has_valid_week)
|
||||
if (!c.has_valid_week)
|
||||
printk(BIOS_ERR, "\tBad week of manufacture\n");
|
||||
if (!has_valid_detailed_blocks)
|
||||
if (!c.has_valid_detailed_blocks)
|
||||
printk(BIOS_ERR, "\tDetailed blocks filled with garbage\n");
|
||||
if (!has_valid_dummy_block)
|
||||
if (!c.has_valid_dummy_block)
|
||||
printk(BIOS_ERR, "\tDummy block filled with garbage\n");
|
||||
if (!has_valid_extension_count)
|
||||
if (!c.has_valid_extension_count)
|
||||
printk(BIOS_ERR, "\tImpossible extension block count\n");
|
||||
if (!manufacturer_name_well_formed)
|
||||
if (!c.manufacturer_name_well_formed)
|
||||
printk(BIOS_ERR, "\tManufacturer name field contains garbage\n");
|
||||
if (!has_valid_descriptor_ordering)
|
||||
if (!c.has_valid_descriptor_ordering)
|
||||
printk(BIOS_ERR, "\tInvalid detailed timing descriptor ordering\n");
|
||||
if (!has_valid_range_descriptor)
|
||||
if (!c.has_valid_range_descriptor)
|
||||
printk(BIOS_ERR, "\tRange descriptor contains garbage\n");
|
||||
if (!has_valid_max_dotclock)
|
||||
if (!c.has_valid_max_dotclock)
|
||||
printk(BIOS_ERR, "\tEDID 1.4 block does not set max dotclock\n");
|
||||
}
|
||||
|
||||
if (warning_excessive_dotclock_correction)
|
||||
if (c.warning_excessive_dotclock_correction)
|
||||
printk(BIOS_ERR,
|
||||
"Warning: CVT block corrects dotclock by more than 9.75MHz\n");
|
||||
if (warning_zero_preferred_refresh)
|
||||
if (c.warning_zero_preferred_refresh)
|
||||
printk(BIOS_ERR,
|
||||
"Warning: CVT block does not set preferred refresh rate\n");
|
||||
return !conformant;
|
||||
return !c.conformant;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1447,14 +1455,10 @@ void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr)
|
|||
* I'm not sure with grahpics you ever can.
|
||||
*/
|
||||
edid_fb.bits_per_pixel = edid->framebuffer_bits_per_pixel;
|
||||
edid_fb.reserved_mask_pos = 0;
|
||||
edid_fb.reserved_mask_size = 0;
|
||||
switch(edid->framebuffer_bits_per_pixel){
|
||||
case 32:
|
||||
case 24:
|
||||
/* packed into 4-byte words */
|
||||
edid_fb.reserved_mask_pos = 24;
|
||||
edid_fb.reserved_mask_size = 8;
|
||||
edid_fb.red_mask_pos = 16;
|
||||
edid_fb.red_mask_size = 8;
|
||||
edid_fb.green_mask_pos = 8;
|
||||
|
|
@ -1477,6 +1481,8 @@ void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr)
|
|||
return;
|
||||
}
|
||||
|
||||
edid_fb.reserved_mask_pos = 0;
|
||||
edid_fb.reserved_mask_size = 0;
|
||||
vbe_valid = 1;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue