On 26.03.2019 11:31, Tomi Valkeinen wrote:
> Currently we have tc_main_link_setup(), which configures and enabled the
enables
> link, but we have no counter-part for disabling the link.
>
> Add tc_main_link_disable, and rename tc_main_link_setup to
> tc_main_link_enable.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
> ---
> drivers/gpu/drm/bridge/tc358767.c | 27 ++++++++++++++++++++++++---
> 1 file changed, 24 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358767.c
> b/drivers/gpu/drm/bridge/tc358767.c
> index f8039149a4e8..fe5fd7db0247 100644
> --- a/drivers/gpu/drm/bridge/tc358767.c
> +++ b/drivers/gpu/drm/bridge/tc358767.c
> @@ -822,7 +822,7 @@ static int tc_link_training(struct tc_data *tc, int
> pattern)
> return ret;
> }
>
> -static int tc_main_link_setup(struct tc_data *tc)
> +static int tc_main_link_enable(struct tc_data *tc)
> {
> struct drm_dp_aux *aux = &tc->aux;
> struct device *dev = tc->dev;
> @@ -837,6 +837,8 @@ static int tc_main_link_setup(struct tc_data *tc)
> if (!tc->mode)
> return -EINVAL;
>
> + dev_dbg(tc->dev, "link enable\n");
> +
> tc_write(DP0_SRCCTRL, tc_srcctrl(tc));
> /* SSCG and BW27 on DP1 must be set to the same as on DP0 */
> tc_write(DP1_SRCCTRL,
> @@ -1005,6 +1007,20 @@ static int tc_main_link_setup(struct tc_data *tc)
> return ret;
> }
>
> +static int tc_main_link_disable(struct tc_data *tc)
> +{
> + int ret;
> +
> + dev_dbg(tc->dev, "link disable\n");
> +
> + tc_write(DP0_SRCCTRL, 0);
> + tc_write(DP0CTL, 0);
The same register is set in stream_disable, is it correct? Looks
suspicious, disabling stream and link should be different things.
Regards
Andrzej
> +
> + return 0;
> +err:
> + return ret;
> +}
> +
> static int tc_stream_enable(struct tc_data *tc)
> {
> int ret;
> @@ -1083,15 +1099,16 @@ static void tc_bridge_enable(struct drm_bridge
> *bridge)
> struct tc_data *tc = bridge_to_tc(bridge);
> int ret;
>
> - ret = tc_main_link_setup(tc);
> + ret = tc_main_link_enable(tc);
> if (ret < 0) {
> - dev_err(tc->dev, "main link setup error: %d\n", ret);
> + dev_err(tc->dev, "main link enable error: %d\n", ret);
> return;
> }
>
> ret = tc_stream_enable(tc);
> if (ret < 0) {
> dev_err(tc->dev, "main link stream start error: %d\n", ret);
> + tc_main_link_disable(tc);
> return;
> }
>
> @@ -1108,6 +1125,10 @@ static void tc_bridge_disable(struct drm_bridge
> *bridge)
> ret = tc_stream_disable(tc);
> if (ret < 0)
> dev_err(tc->dev, "main link stream stop error: %d\n", ret);
> +
> + ret = tc_main_link_disable(tc);
> + if (ret < 0)
> + dev_err(tc->dev, "main link disable error: %d\n", ret);
> }
>
> static void tc_bridge_post_disable(struct drm_bridge *bridge)
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