| Message ID | 20241016-upstream-v6-v6-2-4d93a0c46de1@ite.com.tw (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/bridge: it6505: fix HDCP CTS fail items and add MCCS support | expand |
On Wed, Oct 16, 2024 at 03:54:14PM +0800, Hermes Wu via B4 Relay wrote: > From: Hermes Wu <Hermes.wu@ite.com.tw> > > The original AUX operation using data registers is limited to 4 bytes. > The AUX operation command CMD_AUX_I2C_EDID_READ uses AUX FIFO and > is capable of reading 16 bytes. > This improves the speed of EDID read. > > Signed-off-by: Hermes Wu <Hermes.wu@ite.com.tw> > --- > drivers/gpu/drm/bridge/ite-it6505.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 3272ca6951f2585f9592834869de23ac50ce41a4..9747d7ccf435d536da55c6a3ff79e504b7c724f0 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -1076,10 +1076,13 @@ static ssize_t it6505_aux_do_transfer(struct it6505 *it6505, size_t size, enum aux_cmd_reply *reply) { int i, ret_size, ret = 0, request_size; + int fifo_max_size = (cmd == CMD_AUX_I2C_EDID_READ) ? AUX_FIFO_MAX_SIZE : 4; mutex_lock(&it6505->aux_lock); - for (i = 0; i < size; i += 4) { - request_size = min((int)size - i, 4); + i = 0; + do { + request_size = min_t(int, (int)size - i, fifo_max_size); + ret_size = it6505_aux_operation(it6505, cmd, address + i, buffer + i, request_size, reply); @@ -1088,8 +1091,9 @@ static ssize_t it6505_aux_do_transfer(struct it6505 *it6505, goto aux_op_err; } + i += request_size; ret += ret_size; - } + } while (i < size); aux_op_err: mutex_unlock(&it6505->aux_lock);