[PATCH 1/4] drm/bridge: ti-sn65dsi86: Combine register accesses in ti_sn_aux_transfer()

[Doug Anderson]

Hi,

On Wed, Oct 28, 2020 at 6:11 PM Stephen Boyd <swboyd at chromium.org> wrote:
>
> These register reads and writes are sometimes directly next to each
> other in the register address space. Let's use regmap bulk read/write
> APIs to get the data with one transfer instead of multiple i2c
> transfers. This helps cut down on the number of transfers in the case of
> something like reading an EDID where we read in blocks of 16 bytes at a
> time and the last for loop here is sending an i2c transfer for each of
> those 16 bytes, one at a time. Ouch!
>
> Cc: Douglas Anderson <dianders at chromium.org>
> Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> Cc: Jonas Karlman <jonas at kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec at siol.net>
> Cc: Sean Paul <seanpaul at chromium.org>

+Sam Ravnborg has helped land a few changes to this bridge drive in
the past, so maybe good to CC him if you have future spins?

> Signed-off-by: Stephen Boyd <swboyd at chromium.org>
> ---
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 50 ++++++++++++---------------
>  1 file changed, 22 insertions(+), 28 deletions(-)

Since we already did some early reviews off-list, it's not a surprise
that I have no comments.  ;-)

Reviewed-by: Douglas Anderson <dianders at chromium.org>