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authorAlex Deucher <alexdeucher@gmail.com>2010-02-05 04:21:19 -0500
committerDave Airlie <airlied@redhat.com>2010-02-09 09:31:20 +1000
commit3c537889e17232e9073f75ae8710ea0f008c5a29 (patch)
tree9d3c25825b466b8ddc3fdc8224d4484c99173b08 /drivers/gpu/drm/drm_edid.c
parent2739d49cd7f1f44876cad614b072da698967b370 (diff)
drm/radeon/kms: add support for hardcoded edids in rom (v2)
Some servers hardcode an edid in rom so that they will work properly with KVMs. This is a port of the relevant code from the ddx. [airlied: reworked to validate edid at boot stage - and remove special quirk, if there is a valid EDID in the BIOS rom we'll just try and use it.] Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r--drivers/gpu/drm/drm_edid.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index f665b05592f..f41e91ceaea 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -60,8 +60,7 @@
#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
/* use +hsync +vsync for detailed mode */
#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
-/* define the number of Extension EDID block */
-#define MAX_EDID_EXT_NUM 4
+
#define LEVEL_DMT 0
#define LEVEL_GTF 1
@@ -114,14 +113,14 @@ static const u8 edid_header[] = {
};
/**
- * edid_is_valid - sanity check EDID data
+ * drm_edid_is_valid - sanity check EDID data
* @edid: EDID data
*
* Sanity check the EDID block by looking at the header, the version number
* and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
* valid.
*/
-static bool edid_is_valid(struct edid *edid)
+bool drm_edid_is_valid(struct edid *edid)
{
int i, score = 0;
u8 csum = 0;
@@ -163,6 +162,7 @@ bad:
}
return 0;
}
+EXPORT_SYMBOL(drm_edid_is_valid);
/**
* edid_vendor - match a string against EDID's obfuscated vendor field
@@ -1069,8 +1069,8 @@ static int add_detailed_info_eedid(struct drm_connector *connector,
}
/* Chose real EDID extension number */
- edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
- MAX_EDID_EXT_NUM : edid->extensions;
+ edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
+ DRM_MAX_EDID_EXT_NUM : edid->extensions;
/* Find CEA extension */
for (i = 0; i < edid_ext_num; i++) {
@@ -1152,7 +1152,7 @@ static int drm_ddc_read_edid(struct drm_connector *connector,
for (i = 0; i < 4; i++) {
if (drm_do_probe_ddc_edid(adapter, buf, len))
return -1;
- if (edid_is_valid((struct edid *)buf))
+ if (drm_edid_is_valid((struct edid *)buf))
return 0;
}
@@ -1177,7 +1177,7 @@ struct edid *drm_get_edid(struct drm_connector *connector,
int ret;
struct edid *edid;
- edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
+ edid = kmalloc(EDID_LENGTH * (DRM_MAX_EDID_EXT_NUM + 1),
GFP_KERNEL);
if (edid == NULL) {
dev_warn(&connector->dev->pdev->dev,
@@ -1195,14 +1195,14 @@ struct edid *drm_get_edid(struct drm_connector *connector,
if (edid->extensions != 0) {
int edid_ext_num = edid->extensions;
- if (edid_ext_num > MAX_EDID_EXT_NUM) {
+ if (edid_ext_num > DRM_MAX_EDID_EXT_NUM) {
dev_warn(&connector->dev->pdev->dev,
"The number of extension(%d) is "
"over max (%d), actually read number (%d)\n",
- edid_ext_num, MAX_EDID_EXT_NUM,
- MAX_EDID_EXT_NUM);
+ edid_ext_num, DRM_MAX_EDID_EXT_NUM,
+ DRM_MAX_EDID_EXT_NUM);
/* Reset EDID extension number to be read */
- edid_ext_num = MAX_EDID_EXT_NUM;
+ edid_ext_num = DRM_MAX_EDID_EXT_NUM;
}
/* Read EDID including extensions too */
ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
@@ -1245,8 +1245,8 @@ bool drm_detect_hdmi_monitor(struct edid *edid)
goto end;
/* Chose real EDID extension number */
- edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
- MAX_EDID_EXT_NUM : edid->extensions;
+ edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
+ DRM_MAX_EDID_EXT_NUM : edid->extensions;
/* Find CEA extension */
for (i = 0; i < edid_ext_num; i++) {
@@ -1303,7 +1303,7 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
if (edid == NULL) {
return 0;
}
- if (!edid_is_valid(edid)) {
+ if (!drm_edid_is_valid(edid)) {
dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
drm_get_connector_name(connector));
return 0;