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path: root/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
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Diffstat (limited to 'drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c')
-rw-r--r--drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c57
1 files changed, 9 insertions, 48 deletions
diff --git a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
index 460db3c8a0..e93083bbec 100644
--- a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
+++ b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
@@ -65,12 +65,11 @@ struct ge_b850v3_lvds {
static struct ge_b850v3_lvds *ge_b850v3_lvds_ptr;
-static u8 *stdp2690_get_edid(struct i2c_client *client)
+static int stdp2690_read_block(void *context, u8 *buf, unsigned int block, size_t len)
{
+ struct i2c_client *client = context;
struct i2c_adapter *adapter = client->adapter;
- unsigned char start = 0x00;
- unsigned int total_size;
- u8 *block = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ unsigned char start = block * EDID_LENGTH;
struct i2c_msg msgs[] = {
{
@@ -81,53 +80,15 @@ static u8 *stdp2690_get_edid(struct i2c_client *client)
}, {
.addr = client->addr,
.flags = I2C_M_RD,
- .len = EDID_LENGTH,
- .buf = block,
+ .len = len,
+ .buf = buf,
}
};
- if (!block)
- return NULL;
+ if (i2c_transfer(adapter, msgs, 2) != 2)
+ return -1;
- if (i2c_transfer(adapter, msgs, 2) != 2) {
- DRM_ERROR("Unable to read EDID.\n");
- goto err;
- }
-
- if (!drm_edid_block_valid(block, 0, false, NULL)) {
- DRM_ERROR("Invalid EDID data\n");
- goto err;
- }
-
- total_size = (block[EDID_EXT_BLOCK_CNT] + 1) * EDID_LENGTH;
- if (total_size > EDID_LENGTH) {
- kfree(block);
- block = kmalloc(total_size, GFP_KERNEL);
- if (!block)
- return NULL;
-
- /* Yes, read the entire buffer, and do not skip the first
- * EDID_LENGTH bytes.
- */
- start = 0x00;
- msgs[1].len = total_size;
- msgs[1].buf = block;
-
- if (i2c_transfer(adapter, msgs, 2) != 2) {
- DRM_ERROR("Unable to read EDID extension blocks.\n");
- goto err;
- }
- if (!drm_edid_block_valid(block, 1, false, NULL)) {
- DRM_ERROR("Invalid EDID data\n");
- goto err;
- }
- }
-
- return block;
-
-err:
- kfree(block);
- return NULL;
+ return 0;
}
static struct edid *ge_b850v3_lvds_get_edid(struct drm_bridge *bridge,
@@ -137,7 +98,7 @@ static struct edid *ge_b850v3_lvds_get_edid(struct drm_bridge *bridge,
client = ge_b850v3_lvds_ptr->stdp2690_i2c;
- return (struct edid *)stdp2690_get_edid(client);
+ return drm_do_get_edid(connector, stdp2690_read_block, client);
}
static int ge_b850v3_lvds_get_modes(struct drm_connector *connector)