[PATCH] drm/msm/dsi: Fix bug in dsi_mgr_phy_enable

[Rob Clark]

On Thu, Feb 16, 2017 at 5:59 AM, Archit Taneja <architt at codeaurora.org> wrote:
> A recent commit introduces a bug in dsi_mgr_phy_enable. In the non
> dual DSI mode, we reset the mdsi (master DSI) PHY. This isn't right
> since master and slave DSI exist only in dual DSI mode. For the normal
> mode of operation, we should simply reset the PHY of the DSI device
> (i.e. msm_dsi) corresponding to the current bridge.
>
> Usage of the wrong DSI pointer also resulted in a static checker
> warning. That too is resolved with this fix.
>
> Fixes: b62aa70a98c5 (drm/msm/dsi: Move PHY operations out of host)
>
> Reported-by: Dan Carpenter <dan.carpenter at oracle.com>
> Signed-off-by: Archit Taneja <architt at codeaurora.org>

Reviewed-by: Rob Clark <robdclark at gmail.com>

> ---
>  drivers/gpu/drm/msm/dsi/dsi_manager.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> index 921270ea6059..a879ffa534b4 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> @@ -171,7 +171,7 @@ dsi_mgr_phy_enable(int id,
>                         }
>                 }
>         } else {
> -               msm_dsi_host_reset_phy(mdsi->host);
> +               msm_dsi_host_reset_phy(msm_dsi->host);
>                 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
>                 if (ret)
>                         return ret;
> --
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>