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authorDave Airlie <airlied@redhat.com>2014-10-20 16:29:33 +1000
committerDave Airlie <airlied@redhat.com>2014-12-09 09:56:48 +1000
commit40d9b043a89e2301e1f97ade055a73ecc28e9afe (patch)
tree74bb18795eefa5a95852b100fe864f6bfaa26acc /drivers/gpu
parentc6a0aed4d493936f61cd153db84531026705c94d (diff)
drm/connector: store tile information from displayid (v3)
This creates a tile group from DisplayID block, and stores the pieces of parsed info from the DisplayID block into the connector. v2: add missing signoff, add new connector bits to docs. v3: remove some debugging. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/drm_crtc.c5
-rw-r--r--drivers/gpu/drm/drm_edid.c144
2 files changed, 146 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 0d1eaa9966e9..eb89327fb737 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -908,6 +908,11 @@ void drm_connector_cleanup(struct drm_connector *connector)
struct drm_device *dev = connector->dev;
struct drm_display_mode *mode, *t;
+ if (connector->tile_group) {
+ drm_mode_put_tile_group(dev, connector->tile_group);
+ connector->tile_group = NULL;
+ }
+
list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
drm_mode_remove(connector, mode);
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index a7b5a71856a7..72fd8820e186 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -34,6 +34,7 @@
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_edid.h>
+#include <drm/drm_displayid.h>
#define version_greater(edid, maj, min) \
(((edid)->version > (maj)) || \
@@ -1014,6 +1015,8 @@ module_param_named(edid_fixup, edid_fixup, int, 0400);
MODULE_PARM_DESC(edid_fixup,
"Minimum number of valid EDID header bytes (0-8, default 6)");
+static void drm_get_displayid(struct drm_connector *connector,
+ struct edid *edid);
/**
* drm_edid_block_valid - Sanity check the EDID block (base or extension)
* @raw_edid: pointer to raw EDID block
@@ -1308,10 +1311,15 @@ EXPORT_SYMBOL(drm_probe_ddc);
struct edid *drm_get_edid(struct drm_connector *connector,
struct i2c_adapter *adapter)
{
+ struct edid *edid;
+
if (!drm_probe_ddc(adapter))
return NULL;
- return drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter);
+ edid = drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter);
+ if (edid)
+ drm_get_displayid(connector, edid);
+ return edid;
}
EXPORT_SYMBOL(drm_get_edid);
@@ -2406,7 +2414,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
/*
* Search EDID for CEA extension block.
*/
-static u8 *drm_find_cea_extension(struct edid *edid)
+static u8 *drm_find_edid_extension(struct edid *edid, int ext_id)
{
u8 *edid_ext = NULL;
int i;
@@ -2418,7 +2426,7 @@ static u8 *drm_find_cea_extension(struct edid *edid)
/* Find CEA extension */
for (i = 0; i < edid->extensions; i++) {
edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
- if (edid_ext[0] == CEA_EXT)
+ if (edid_ext[0] == ext_id)
break;
}
@@ -2428,6 +2436,16 @@ static u8 *drm_find_cea_extension(struct edid *edid)
return edid_ext;
}
+static u8 *drm_find_cea_extension(struct edid *edid)
+{
+ return drm_find_edid_extension(edid, CEA_EXT);
+}
+
+static u8 *drm_find_displayid_extension(struct edid *edid)
+{
+ return drm_find_edid_extension(edid, DISPLAYID_EXT);
+}
+
/*
* Calculate the alternate clock for the CEA mode
* (60Hz vs. 59.94Hz etc.)
@@ -3888,3 +3906,123 @@ drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
return 0;
}
EXPORT_SYMBOL(drm_hdmi_vendor_infoframe_from_display_mode);
+
+static int drm_parse_display_id(struct drm_connector *connector,
+ u8 *displayid, int length,
+ bool is_edid_extension)
+{
+ /* if this is an EDID extension the first byte will be 0x70 */
+ int idx = 0;
+ struct displayid_hdr *base;
+ struct displayid_block *block;
+ u8 csum = 0;
+ int i;
+
+ if (is_edid_extension)
+ idx = 1;
+
+ base = (struct displayid_hdr *)&displayid[idx];
+
+ DRM_DEBUG_KMS("base revision 0x%x, length %d, %d %d\n",
+ base->rev, base->bytes, base->prod_id, base->ext_count);
+
+ if (base->bytes + 5 > length - idx)
+ return -EINVAL;
+
+ for (i = idx; i <= base->bytes + 5; i++) {
+ csum += displayid[i];
+ }
+ if (csum) {
+ DRM_ERROR("DisplayID checksum invalid, remainder is %d\n", csum);
+ return -EINVAL;
+ }
+
+ block = (struct displayid_block *)&displayid[idx + 4];
+ DRM_DEBUG_KMS("block id %d, rev %d, len %d\n",
+ block->tag, block->rev, block->num_bytes);
+
+ switch (block->tag) {
+ case DATA_BLOCK_TILED_DISPLAY: {
+ struct displayid_tiled_block *tile = (struct displayid_tiled_block *)block;
+
+ u16 w, h;
+ u8 tile_v_loc, tile_h_loc;
+ u8 num_v_tile, num_h_tile;
+ struct drm_tile_group *tg;
+
+ w = tile->tile_size[0] | tile->tile_size[1] << 8;
+ h = tile->tile_size[2] | tile->tile_size[3] << 8;
+
+ num_v_tile = (tile->topo[0] & 0xf) | (tile->topo[2] & 0x30);
+ num_h_tile = (tile->topo[0] >> 4) | ((tile->topo[2] >> 2) & 0x30);
+ tile_v_loc = (tile->topo[1] & 0xf) | ((tile->topo[2] & 0x3) << 4);
+ tile_h_loc = (tile->topo[1] >> 4) | (((tile->topo[2] >> 2) & 0x3) << 4);
+
+ connector->has_tile = true;
+ if (tile->tile_cap & 0x80)
+ connector->tile_is_single_monitor = true;
+
+ connector->num_h_tile = num_h_tile + 1;
+ connector->num_v_tile = num_v_tile + 1;
+ connector->tile_h_loc = tile_h_loc;
+ connector->tile_v_loc = tile_v_loc;
+ connector->tile_h_size = w + 1;
+ connector->tile_v_size = h + 1;
+
+ DRM_DEBUG_KMS("tile cap 0x%x\n", tile->tile_cap);
+ DRM_DEBUG_KMS("tile_size %d x %d\n", w + 1, h + 1);
+ DRM_DEBUG_KMS("topo num tiles %dx%d, location %dx%d\n",
+ num_h_tile + 1, num_v_tile + 1, tile_h_loc, tile_v_loc);
+ DRM_DEBUG_KMS("vend %c%c%c\n", tile->topology_id[0], tile->topology_id[1], tile->topology_id[2]);
+
+ tg = drm_mode_get_tile_group(connector->dev, tile->topology_id);
+ if (!tg) {
+ tg = drm_mode_create_tile_group(connector->dev, tile->topology_id);
+ }
+ if (!tg)
+ return -ENOMEM;
+
+ if (connector->tile_group != tg) {
+ /* if we haven't got a pointer,
+ take the reference, drop ref to old tile group */
+ if (connector->tile_group) {
+ drm_mode_put_tile_group(connector->dev, connector->tile_group);
+ }
+ connector->tile_group = tg;
+ } else
+ /* if same tile group, then release the ref we just took. */
+ drm_mode_put_tile_group(connector->dev, tg);
+ }
+ break;
+ default:
+ printk("unknown displayid tag %d\n", block->tag);
+ break;
+ }
+ return 0;
+}
+
+static void drm_get_displayid(struct drm_connector *connector,
+ struct edid *edid)
+{
+ void *displayid = NULL;
+ int ret;
+ connector->has_tile = false;
+ displayid = drm_find_displayid_extension(edid);
+ if (!displayid) {
+ /* drop reference to any tile group we had */
+ goto out_drop_ref;
+ }
+
+ ret = drm_parse_display_id(connector, displayid, EDID_LENGTH, true);
+ if (ret < 0)
+ goto out_drop_ref;
+ if (!connector->has_tile)
+ goto out_drop_ref;
+ return;
+out_drop_ref:
+ if (connector->tile_group) {
+ drm_mode_put_tile_group(connector->dev, connector->tile_group);
+ connector->tile_group = NULL;
+ }
+ return;
+}