drm/atomic-helper: Add NO_DISABLE_AFTER_MODESET flag support for plane commit

Drivers may set the NO_DISABLE_AFTER_MODESET flag in the 'flags' parameter
of the helper drm_atomic_helper_commit_planes() if the relevant display
controllers(e.g., IPUv3 for imx-drm) require to disable a CRTC's planes
when the CRTC is disabled. The helper would skip the ->atomic_disable
call for a plane if the CRTC of the old plane state needs a modesetting
operation. Of course, the drivers need to disable the planes in their CRTC
disable callbacks since no one else would do that.

Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Peter Senna Tschudin <peter.senna@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Liu Ying <gnuiyl@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1472461923-14364-1-git-send-email-gnuiyl@gmail.com

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index 82171d2..c383d72 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -91,7 +91,8 @@ static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
 
        drm_atomic_helper_commit_modeset_disables(drm, state);
        drm_atomic_helper_commit_modeset_enables(drm, state);
-       drm_atomic_helper_commit_planes(drm, state, true);
+       drm_atomic_helper_commit_planes(drm, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        malidp_atomic_commit_hw_done(state);
 

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index d4a3d61..8e7483d 100644 (file)
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -457,7 +457,7 @@ atmel_hlcdc_dc_atomic_complete(struct atmel_hlcdc_dc_commit *commit)
 
        /* Apply the atomic update. */
        drm_atomic_helper_commit_modeset_disables(dev, old_state);
-       drm_atomic_helper_commit_planes(dev, old_state, false);
+       drm_atomic_helper_commit_planes(dev, old_state, 0);
        drm_atomic_helper_commit_modeset_enables(dev, old_state);
 
        drm_atomic_helper_wait_for_vblanks(dev, old_state);

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 5f82290..6fdd7ba 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1148,7 +1148,8 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
  *
  *     drm_atomic_helper_commit_modeset_enables(dev, state);
  *
- *     drm_atomic_helper_commit_planes(dev, state, true);
+ *     drm_atomic_helper_commit_planes(dev, state,
+ *                                     DRM_PLANE_COMMIT_ACTIVE_ONLY);
  *
  * for committing the atomic update to hardware.  See the kerneldoc entries for
  * these three functions for more details.
@@ -1159,7 +1160,7 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *state)
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, false);
+       drm_atomic_helper_commit_planes(dev, state, 0);
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 
@@ -1678,7 +1679,7 @@ bool plane_crtc_active(struct drm_plane_state *state)
  * drm_atomic_helper_commit_planes - commit plane state
  * @dev: DRM device
  * @old_state: atomic state object with old state structures
- * @active_only: Only commit on active CRTC if set
+ * @flags: flags for committing plane state
  *
  * This function commits the new plane state using the plane and atomic helper
  * functions for planes and crtcs. It assumes that the atomic state has already
@@ -1698,25 +1699,34 @@ bool plane_crtc_active(struct drm_plane_state *state)
  * most drivers don't need to be immediately notified of plane updates for a
  * disabled CRTC.
  *
- * Unless otherwise needed, drivers are advised to set the @active_only
- * parameters to true in order not to receive plane update notifications related
- * to a disabled CRTC. This avoids the need to manually ignore plane updates in
+ * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in
+ * @flags in order not to receive plane update notifications related to a
+ * disabled CRTC. This avoids the need to manually ignore plane updates in
  * driver code when the driver and/or hardware can't or just don't need to deal
  * with updates on disabled CRTCs, for example when supporting runtime PM.
  *
- * The drm_atomic_helper_commit() default implementation only sets @active_only
- * to false to most closely match the behaviour of the legacy helpers. This should
- * not be copied blindly by drivers.
+ * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant
+ * display controllers require to disable a CRTC's planes when the CRTC is
+ * disabled. This function would skip the ->atomic_disable call for a plane if
+ * the CRTC of the old plane state needs a modesetting operation. Of course,
+ * the drivers need to disable the planes in their CRTC disable callbacks
+ * since no one else would do that.
+ *
+ * The drm_atomic_helper_commit() default implementation doesn't set the
+ * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers.
+ * This should not be copied blindly by drivers.
  */
 void drm_atomic_helper_commit_planes(struct drm_device *dev,
                                     struct drm_atomic_state *old_state,
-                                    bool active_only)
+                                    uint32_t flags)
 {
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state;
        struct drm_plane *plane;
        struct drm_plane_state *old_plane_state;
        int i;
+       bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
+       bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
 
        for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
                const struct drm_crtc_helper_funcs *funcs;
@@ -1760,10 +1770,19 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
                /*
                 * Special-case disabling the plane if drivers support it.
                 */
-               if (disabling && funcs->atomic_disable)
+               if (disabling && funcs->atomic_disable) {
+                       struct drm_crtc_state *crtc_state;
+
+                       crtc_state = old_plane_state->crtc->state;
+
+                       if (drm_atomic_crtc_needs_modeset(crtc_state) &&
+                           no_disable)
+                               continue;
+
                        funcs->atomic_disable(plane, old_plane_state);
-               else if (plane->state->crtc || disabling)
+               } else if (plane->state->crtc || disabling) {
                        funcs->atomic_update(plane, old_plane_state);
+               }
        }
 
        for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 877d2ef..486943e 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -105,7 +105,7 @@ static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
                atomic_inc(&exynos_crtc->pending_update);
        }
 
-       drm_atomic_helper_commit_planes(dev, state, false);
+       drm_atomic_helper_commit_planes(dev, state, 0);
 
        exynos_atomic_wait_for_commit(state);
 

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 438bac8..56dfc4c 100644 (file)
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -193,7 +193,8 @@ static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, true);
+       drm_atomic_helper_commit_planes(dev, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 0e769ab..72c1ae4 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -70,13 +70,15 @@ static void mtk_atomic_complete(struct mtk_drm_private *private,
         *
         *     drm_atomic_helper_commit_modeset_disables(dev, state);
         *     drm_atomic_helper_commit_modeset_enables(dev, state);
-        *     drm_atomic_helper_commit_planes(dev, state, true);
+        *     drm_atomic_helper_commit_planes(dev, state,
+        *                                     DRM_PLANE_COMMIT_ACTIVE_ONLY);
         *
         * See the kerneldoc entries for these three functions for more details.
         */
        drm_atomic_helper_commit_modeset_disables(drm, state);
        drm_atomic_helper_commit_modeset_enables(drm, state);
-       drm_atomic_helper_commit_planes(drm, state, true);
+       drm_atomic_helper_commit_planes(drm, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_wait_for_vblanks(drm, state);
 

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 4a8a6f1..5df252c 100644 (file)
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -118,7 +118,7 @@ static void complete_commit(struct msm_commit *c, bool async)
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, false);
+       drm_atomic_helper_commit_planes(dev, state, 0);
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 3dd78f2..e1cfba5 100644 (file)
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -96,7 +96,7 @@ static void omap_atomic_complete(struct omap_atomic_state_commit *commit)
        dispc_runtime_get();
 
        drm_atomic_helper_commit_modeset_disables(dev, old_state);
-       drm_atomic_helper_commit_planes(dev, old_state, false);
+       drm_atomic_helper_commit_planes(dev, old_state, 0);
        drm_atomic_helper_commit_modeset_enables(dev, old_state);
 
        omap_atomic_wait_for_completion(dev, old_state);

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index f03eb55..bd9c3bb 100644 (file)
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -257,7 +257,8 @@ static void rcar_du_atomic_complete(struct rcar_du_commit *commit)
        /* Apply the atomic update. */
        drm_atomic_helper_commit_modeset_disables(dev, old_state);
        drm_atomic_helper_commit_modeset_enables(dev, old_state);
-       drm_atomic_helper_commit_planes(dev, old_state, true);
+       drm_atomic_helper_commit_planes(dev, old_state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_wait_for_vblanks(dev, old_state);
 

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 55c5273..7ca8f34 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -233,7 +233,8 @@ rockchip_atomic_commit_tail(struct drm_atomic_state *state)
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, true);
+       drm_atomic_helper_commit_planes(dev, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_commit_hw_done(state);
 

diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
index f8311b2..7cd3804 100644 (file)
--- a/drivers/gpu/drm/sti/sti_drv.c
+++ b/drivers/gpu/drm/sti/sti_drv.c
@@ -178,7 +178,7 @@ static void sti_atomic_complete(struct sti_private *private,
         */
 
        drm_atomic_helper_commit_modeset_disables(drm, state);
-       drm_atomic_helper_commit_planes(drm, state, false);
+       drm_atomic_helper_commit_planes(drm, state, 0);
        drm_atomic_helper_commit_modeset_enables(drm, state);
 
        drm_atomic_helper_wait_for_vblanks(drm, state);

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 755264d..4b9f1c7 100644 (file)
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -57,7 +57,8 @@ static void tegra_atomic_complete(struct tegra_drm *tegra,
 
        drm_atomic_helper_commit_modeset_disables(drm, state);
        drm_atomic_helper_commit_modeset_enables(drm, state);
-       drm_atomic_helper_commit_planes(drm, state, true);
+       drm_atomic_helper_commit_planes(drm, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_wait_for_vblanks(drm, state);
 

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 3404d24..4405e4b 100644 (file)
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -118,7 +118,7 @@ static int tilcdc_commit(struct drm_device *dev,
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, false);
+       drm_atomic_helper_commit_planes(dev, state, 0);
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 

diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 4ac894d..c1f65c6 100644 (file)
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -44,7 +44,7 @@ vc4_atomic_complete_commit(struct vc4_commit *c)
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
 
-       drm_atomic_helper_commit_planes(dev, state, false);
+       drm_atomic_helper_commit_planes(dev, state, 0);
 
        drm_atomic_helper_commit_modeset_enables(dev, state);
 

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index 4e192aa..7cf3678 100644 (file)
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -338,7 +338,8 @@ static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
 
        drm_atomic_helper_commit_modeset_disables(dev, state);
        drm_atomic_helper_commit_modeset_enables(dev, state);
-       drm_atomic_helper_commit_planes(dev, state, true);
+       drm_atomic_helper_commit_planes(dev, state,
+                                       DRM_PLANE_COMMIT_ACTIVE_ONLY);
 
        drm_atomic_helper_commit_hw_done(state);
 

diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 1abf2c0..f866828 100644 (file)
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -65,9 +65,13 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 
 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
                                     struct drm_atomic_state *state);
+
+#define DRM_PLANE_COMMIT_ACTIVE_ONLY                   BIT(0)
+#define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET      BIT(1)
+
 void drm_atomic_helper_commit_planes(struct drm_device *dev,
                                     struct drm_atomic_state *state,
-                                    bool active_only);
+                                    uint32_t flags);
 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
                                      struct drm_atomic_state *old_state);
 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);