Change in coreboot[master]: lib/edid.c: Return value differentiates absent and non-confo...

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded a new change for review. ( https://review.coreboot.org/19502 )

Change subject: lib/edid.c: Return value differentiates absent and non-conformant
......................................................................

lib/edid.c: Return value differentiates absent and non-conformant

Change-Id: Id90aa210ff72092c4ab638a7bafb82bd11889bdc
Signed-off-by: Arthur Heymans 
---
M src/include/edid.h
M src/lib/edid.c
2 files changed, 17 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/02/19502/1

diff --git a/src/include/edid.h b/src/include/edid.h
index cf81258..100dbe9 100644
--- a/src/include/edid.h
+++ b/src/include/edid.h
@@ -91,6 +91,12 @@
    int hdmi_monitor_detected;
 };

+enum edid_status {
+	EDID_CONFORMANT,
+	EDID_NOT_CONFORMANT,
+	EDID_ABSENT,
+};
+
 /* Defined in src/lib/edid.c */
 int decode_edid(unsigned char *edid, int size, struct edid *out);
 void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp,
diff --git a/src/lib/edid.c b/src/lib/edid.c
index 58dd813..9de3a24 100644
--- a/src/lib/edid.c
+++ b/src/lib/edid.c
@@ -1134,7 +1134,7 @@
        .has_valid_range_descriptor = 1,
        .has_valid_max_dotclock = 1,
        .has_valid_string_termination = 1,
-	    .conformant = 1,
+	    .conformant = EDID_CONFORMANT,
    };

dump_breakdown(edid);
@@ -1143,7 +1143,7 @@

if (!edid || memcmp(edid, "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00", 8)) {
    	printk(BIOS_SPEW, "No header found\n");
-		return 1;
+		return EDID_ABSENT;
    }

if (manufacturer_name(edid + 0x08))
@@ -1486,7 +1486,7 @@
    	    !c.has_valid_string_termination ||
    	    !c.has_valid_descriptor_pad ||
    	    !c.has_preferred_timing)
-			c.conformant = 0;
+			c.conformant = EDID_NOT_CONFORMANT;
    	if (!c.conformant)
    		printk(BIOS_ERR,
    			"EDID block does NOT conform to EDID 1.4!\n");
@@ -1507,7 +1507,7 @@
    	    !c.has_valid_string_termination ||
    	    !c.has_valid_descriptor_pad ||
    	    !c.has_preferred_timing) {
-			c.conformant = 0;
+			c.conformant = EDID_NOT_CONFORMANT;
    	}
    	/**
    	 * According to E-EDID (EDIDv1.3), has_name_descriptor and
@@ -1543,7 +1543,7 @@
    } else if (c.claims_one_point_two) {
    	if (c.nonconformant_digital_display ||
    	    !c.has_valid_string_termination)
-			c.conformant = 0;
+			c.conformant = EDID_NOT_CONFORMANT;
    	if (!c.conformant)
    		printk(BIOS_ERR,
    			"EDID block does NOT conform to EDID 1.2!\n");
@@ -1556,7 +1556,7 @@
    		   "\tDetailed block string not properly terminated\n");
    } else if (c.claims_one_point_oh) {
    	if (c.seen_non_detailed_descriptor)
-			c.conformant = 0;
+			c.conformant = EDID_NOT_CONFORMANT;
    	if (!c.conformant)
    		printk(BIOS_ERR,
    			"EDID block does NOT conform to EDID 1.0!\n");
@@ -1576,7 +1576,7 @@
        !c.has_valid_descriptor_ordering ||
        !c.has_valid_range_descriptor ||
        !c.manufacturer_name_well_formed) {
-		c.conformant = 0;
+		c.conformant = EDID_CONFORMANT;
    	printk(BIOS_ERR, "EDID block does not conform at all!\n");
    	if (c.nonconformant_extension)
    		printk(BIOS_ERR,
@@ -1618,7 +1618,10 @@
    if (c.warning_zero_preferred_refresh)
    	printk(BIOS_ERR,
    	       "Warning: CVT block does not set preferred refresh rate\n");
-	return !c.conformant;
+	if (!c.conformant)
+		return EDID_NOT_CONFORMANT;
+	else
+		return EDID_CONFORMANT;
 }

/*