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drm/i2c: tda998x: use drm_do_get_edid()

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Replace the internal EDID read implementation by a call to the new EDID
read core function.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Tested-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Laurent Pinchart 2015-01-16 18:37:43 +02:00 committed by Russell King
parent 288ffc73f6
commit 07259f8b9f
1 changed files with 22 additions and 72 deletions
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94
drivers/gpu/drm/i2c/tda998x_drv.c
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@ -1012,8 +1012,9 @@ tda998x_encoder_detect(struct tda998x_priv *priv)
connector_status_disconnected;
}
static int read_edid_block(struct tda998x_priv *priv, uint8_t *buf, int blk)
static int read_edid_block(void *data, u8 *buf, unsigned int blk, size_t length)
{
struct tda998x_priv *priv = data;
uint8_t offset, segptr;
int ret, i;
@ -1057,8 +1058,8 @@ static int read_edid_block(struct tda998x_priv *priv, uint8_t *buf, int blk)
return -ETIMEDOUT;
}
ret = reg_read_range(priv, REG_EDID_DATA_0, buf, EDID_LENGTH);
if (ret != EDID_LENGTH) {
ret = reg_read_range(priv, REG_EDID_DATA_0, buf, length);
if (ret != length) {
dev_err(&priv->hdmi->dev, "failed to read edid block %d: %d\n",
blk, ret);
return ret;
@ -1067,82 +1068,31 @@ static int read_edid_block(struct tda998x_priv *priv, uint8_t *buf, int blk)
return 0;
}
static uint8_t *do_get_edid(struct tda998x_priv *priv)
{
int j, valid_extensions = 0;
uint8_t *block, *new;
bool print_bad_edid = drm_debug & DRM_UT_KMS;
if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
return NULL;
if (priv->rev == TDA19988)
reg_clear(priv, REG_TX4, TX4_PD_RAM);
/* base block fetch */
if (read_edid_block(priv, block, 0))
goto fail;
if (!drm_edid_block_valid(block, 0, print_bad_edid))
goto fail;
/* if there's no extensions, we're done */
if (block[0x7e] == 0)
goto done;
new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
if (!new)
goto fail;
block = new;
for (j = 1; j <= block[0x7e]; j++) {
uint8_t *ext_block = block + (valid_extensions + 1) * EDID_LENGTH;
if (read_edid_block(priv, ext_block, j))
goto fail;
if (!drm_edid_block_valid(ext_block, j, print_bad_edid))
goto fail;
valid_extensions++;
}
if (valid_extensions != block[0x7e]) {
block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
block[0x7e] = valid_extensions;
new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
if (!new)
goto fail;
block = new;
}
done:
if (priv->rev == TDA19988)
reg_set(priv, REG_TX4, TX4_PD_RAM);
return block;
fail:
if (priv->rev == TDA19988)
reg_set(priv, REG_TX4, TX4_PD_RAM);
dev_warn(&priv->hdmi->dev, "failed to read EDID\n");
kfree(block);
return NULL;
}
static int
tda998x_encoder_get_modes(struct tda998x_priv *priv,
struct drm_connector *connector)
{
struct edid *edid = (struct edid *)do_get_edid(priv);
int n = 0;
struct edid *edid;
int n;
if (edid) {
drm_mode_connector_update_edid_property(connector, edid);
n = drm_add_edid_modes(connector, edid);
priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
kfree(edid);
if (priv->rev == TDA19988)
reg_clear(priv, REG_TX4, TX4_PD_RAM);
edid = drm_do_get_edid(connector, read_edid_block, priv);
if (priv->rev == TDA19988)
reg_set(priv, REG_TX4, TX4_PD_RAM);
if (!edid) {
dev_warn(&priv->hdmi->dev, "failed to read EDID\n");
return 0;
}
drm_mode_connector_update_edid_property(connector, edid);
n = drm_add_edid_modes(connector, edid);
priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
kfree(edid);
return n;
}