[PATCH v2] drm/bridge: analogix: Don't return -EINVAL when panel not support PSR in PSR functions

[zain wang <wzz@rock-chips.com>]

We will ignored PSR setting if panel not support it. So, in this case, we should
return from analogix_dp_enable/disable_psr() without any error code.
Let's retrun 0 instead of -EINVAL when panel not support PSR in
analogix_dp_enable/disable_psr().

Signed-off-by: zain wang <wzz@rock-chips.com>
---

Changes in v2:
- Remove dev_warn if panel not support PSR.

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 6e0447f..eb9bf87 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -112,7 +112,7 @@ int analogix_dp_enable_psr(struct device *dev)
 	struct edp_vsc_psr psr_vsc;
 
 	if (!dp->psr_support)
-		return -EINVAL;
+		return 0;
 
 	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
 	memset(&psr_vsc, 0, sizeof(psr_vsc));
@@ -135,7 +135,7 @@ int analogix_dp_disable_psr(struct device *dev)
 	struct edp_vsc_psr psr_vsc;
 
 	if (!dp->psr_support)
-		return -EINVAL;
+		return 0;
 
 	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
 	memset(&psr_vsc, 0, sizeof(psr_vsc));
-- 
1.9.1