Re: [PATCH v3 3/3] drm/bridge/synopsys: dsi: explicitly request exclusive reset control

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On 09/01/2017 07:15 PM, Andrzej Hajda wrote:
On 01.08.2017 15:23, Philippe CORNU wrote:
Based on patch "Convert drivers to explicit reset API" from Philipp Zabel

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Philippe CORNU <philippe.cornu@xxxxxx>
Acked-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
  drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 10 +++-------
  1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 781340d..4e1f91e 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -885,15 +885,11 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge)
  	 * Note that the reset was not defined in the initial device tree, so
  	 * we have to be prepared for it not being found.
  	 */
-	apb_rst = devm_reset_control_get(dev, "apb");
+	apb_rst = devm_reset_control_get_optional_exclusive(dev, "apb");
  	if (IS_ERR(apb_rst)) {
  		ret = PTR_ERR(apb_rst);
-		if (ret == -ENOENT) {
-			apb_rst = NULL;
-		} else {
-			dev_err(dev, "Unable to get reset control: %d\n", ret);
-			return ERR_PTR(ret);
-		}
+		dev_err(dev, "Unable to get reset control: %d\n", ret);

I think in case of deferred probing it shouldn't be dev_err, but this is
rather suggestion.

+		return ERR_PTR(ret);
return apb_rst;

With this fixed:
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>

queued to drm-misc-next after incorporating Andrzej's comment.


  --
Regards
Andrzej

  	}
if (apb_rst) {



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