drm: atmel-hlcdc: use appropriate enabled flag in suspend/resume

Unfortunately we used the enabled flag in struct drm_crtc instead of the
enabled flag in struct atmel_hlcdc_crtc. This obviously leads to
discrepancies on crtc enable state.

This patch fixes the issue by using the struct atmel_hlcdc_crtc enabled
flag in PM support.

Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

3 files changed, 28 insertions, 15 deletions

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index d55c0c232e1d..f69b92535505 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -207,6 +207,27 @@ static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
         crtc->enabled = true;
 }
 
+void atmel_hlcdc_crtc_suspend(struct drm_crtc *c)
+{
+        struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+        if (crtc->enabled) {
+                atmel_hlcdc_crtc_disable(c);
+                /* save enable state for resume */
+                crtc->enabled = true;
+        }
+}
+
+void atmel_hlcdc_crtc_resume(struct drm_crtc *c)
+{
+        struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+        if (crtc->enabled) {
+                crtc->enabled = false;
+                atmel_hlcdc_crtc_enable(c);
+        }
+}
+
 static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c,
                                          struct drm_crtc_state *s)
 {
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index c4bb1f9f95c6..60b0c13d7ff5 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -569,14 +569,8 @@ static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
                 return 0;
 
         drm_modeset_lock_all(drm_dev);
-        list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
-                struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
-                if (crtc->enabled) {
-                        crtc_funcs->disable(crtc);
-                        /* save enable state for resume */
-                        crtc->enabled = true;
-                }
-        }
+        list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
+                atmel_hlcdc_crtc_suspend(crtc);
         drm_modeset_unlock_all(drm_dev);
         return 0;
 }
@@ -590,13 +584,8 @@ static int atmel_hlcdc_dc_drm_resume(struct device *dev)
                 return 0;
 
         drm_modeset_lock_all(drm_dev);
-        list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
-                struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
-                if (crtc->enabled) {
-                        crtc->enabled = false;
-                        crtc_funcs->enable(crtc);
-                }
-        }
+        list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
+                atmel_hlcdc_crtc_resume(crtc);
         drm_modeset_unlock_all(drm_dev);
         return 0;
 }
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index 1ea9c2ccd8a7..cf6b375bc38d 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -155,6 +155,9 @@ void atmel_hlcdc_crtc_irq(struct drm_crtc *c);
 void atmel_hlcdc_crtc_cancel_page_flip(struct drm_crtc *crtc,
                                        struct drm_file *file);
 
+void atmel_hlcdc_crtc_suspend(struct drm_crtc *crtc);
+void atmel_hlcdc_crtc_resume(struct drm_crtc *crtc);
+
 int atmel_hlcdc_crtc_create(struct drm_device *dev);
 
 int atmel_hlcdc_create_outputs(struct drm_device *dev);