lkml.org 
[lkml]   [2019]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 5/5] RFC: drm/atomic-helper: Reapply color transformation after resume
Date
Some platforms are not able to maintain the color transformation
state after a system suspend/resume cycle.

Set the colog_mgmt_changed flag so that CMM on the CRTCs in
the suspend state are reapplied after system resume.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
This is an RFC, and it's mostly based on Jacopo Mondi's work https://lkml.org/lkml/2019/9/6/498.

Changes from v2:
* New patch.
---
drivers/gpu/drm/drm_atomic_helper.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index e41db0f202ca..518488125575 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3234,8 +3234,20 @@ int drm_atomic_helper_resume(struct drm_device *dev,
struct drm_atomic_state *state)
{
struct drm_modeset_acquire_ctx ctx;
+ struct drm_crtc_state *crtc_state;
+ struct drm_crtc *crtc;
+ unsigned int i;
int err;

+ for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
+ /*
+ * Force re-enablement of CMM after system resume if any
+ * of the DRM color transformation properties was set in
+ * the state saved at system suspend time.
+ */
+ if (crtc_state->gamma_lut)
+ crtc_state->color_mgmt_changed = true;
+ }
drm_mode_config_reset(dev);

DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
--
2.22.0
\
 
 \ /
  Last update: 2019-10-01 00:28    [W:0.111 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site