diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/bridge/tc358767.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 1b0ca1de2eae..86ec5bec73c2 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -312,6 +312,20 @@ static int tc_aux_get_status(struct tc_data *tc, u8 *reply) return 0; } +static int tc_aux_read_data(struct tc_data *tc, void *data, size_t size) +{ + u32 auxrdata[DP_AUX_MAX_PAYLOAD_BYTES / sizeof(u32)]; + int ret, count = ALIGN(size, sizeof(u32)); + + ret = regmap_raw_read(tc->regmap, DP0_AUXRDATA(0), auxrdata, count); + if (ret) + return ret; + + memcpy(data, auxrdata, size); + + return size; +} + static ssize_t tc_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { @@ -370,19 +384,10 @@ static ssize_t tc_aux_transfer(struct drm_dp_aux *aux, if (ret) return ret; - if (request == DP_AUX_I2C_READ || request == DP_AUX_NATIVE_READ) { - /* Read data */ - while (i < size) { - if ((i % 4) == 0) { - ret = regmap_read(tc->regmap, - DP0_AUXRDATA(i >> 2), &tmp); - if (ret) - return ret; - } - buf[i] = tmp & 0xff; - tmp = tmp >> 8; - i++; - } + switch (request) { + case DP_AUX_NATIVE_READ: + case DP_AUX_I2C_READ: + return tc_aux_read_data(tc, msg->buffer, size); } return size; |