drm: Add old state pointer to CRTC .enable() helper function

The old state is useful for drivers that need to perform operations at
enable time that depend on the transition between the old and new
states.

While at it, rename the operation to .atomic_enable() to be consistent
with .atomic_disable(), as the .enable() operation is used by atomic
helpers only.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> # for sun4i
Acked-by: Philipp Zabel <p.zabel@pengutronix.de> # for imx-drm and mediatek
Acked-by: Alexey Brodkin <abrodkin@synopsys.com> # for arcpgu
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> # for atmel-hlcdc
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> # for hdlcd and mali-dp
Acked-by: Stefan Agner <stefan@agner.ch> # for fsl-dcu
Tested-by: Philippe Cornu <philippe.cornu@st.com> # for stm
Acked-by: Philippe Cornu <philippe.cornu@st.com> # for stm
Acked-by: Vincent Abriou <vincent.abriou@st.com> # for sti
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> # for vmwgfx
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170630093646.7928-2-laurent.pinchart+renesas@ideasonboard.com

drivers/gpu/drm/arc/arcpgu_crtc.c

@@ -119,7 +119,8 @@ static void arc_pgu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	clk_set_rate(arcpgu->clk, m->crtc_clock * 1000);
 }
 
-static void arc_pgu_crtc_enable(struct drm_crtc *crtc)
+static void arc_pgu_crtc_atomic_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 	struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
 
@@ -161,9 +162,9 @@ static const struct drm_crtc_helper_funcs arc_pgu_crtc_helper_funcs = {
 	.mode_set	= drm_helper_crtc_mode_set,
 	.mode_set_base	= drm_helper_crtc_mode_set_base,
 	.mode_set_nofb	= arc_pgu_crtc_mode_set_nofb,
-	.enable		= arc_pgu_crtc_enable,
 	.disable	= arc_pgu_crtc_disable,
 	.atomic_begin	= arc_pgu_crtc_atomic_begin,
+	.atomic_enable	= arc_pgu_crtc_atomic_enable,
 };
 
 static void arc_pgu_plane_atomic_update(struct drm_plane *plane,

drivers/gpu/drm/arm/hdlcd_crtc.c

@@ -165,7 +165,8 @@ static void hdlcd_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	clk_set_rate(hdlcd->clk, m->crtc_clock * 1000);
 }
 
-static void hdlcd_crtc_enable(struct drm_crtc *crtc)
+static void hdlcd_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_crtc_state *old_state)
 {
 	struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
 
@@ -218,10 +219,10 @@ static void hdlcd_crtc_atomic_begin(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = {
-	.enable		= hdlcd_crtc_enable,
 	.disable	= hdlcd_crtc_disable,
 	.atomic_check	= hdlcd_crtc_atomic_check,
 	.atomic_begin	= hdlcd_crtc_atomic_begin,
+	.atomic_enable	= hdlcd_crtc_atomic_enable,
 };
 
 static int hdlcd_plane_atomic_check(struct drm_plane *plane,

drivers/gpu/drm/arm/malidp_crtc.c

@@ -46,7 +46,8 @@ static enum drm_mode_status malidp_crtc_mode_valid(struct drm_crtc *crtc,
 	return MODE_OK;
 }
 
-static void malidp_crtc_enable(struct drm_crtc *crtc)
+static void malidp_crtc_atomic_enable(struct drm_crtc *crtc,
+				      struct drm_crtc_state *old_state)
 {
 	struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
 	struct malidp_hw_device *hwdev = malidp->dev;
@@ -408,9 +409,9 @@ static int malidp_crtc_atomic_check(struct drm_crtc *crtc,
 
 static const struct drm_crtc_helper_funcs malidp_crtc_helper_funcs = {
 	.mode_valid = malidp_crtc_mode_valid,
-	.enable = malidp_crtc_enable,
 	.disable = malidp_crtc_disable,
 	.atomic_check = malidp_crtc_atomic_check,
+	.atomic_enable = malidp_crtc_atomic_enable,
 };
 
 static struct drm_crtc_state *malidp_crtc_duplicate_state(struct drm_crtc *crtc)

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c

@@ -183,7 +183,8 @@ static void atmel_hlcdc_crtc_disable(struct drm_crtc *c)
 	pm_runtime_put_sync(dev->dev);
 }
 
-static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
+static void atmel_hlcdc_crtc_atomic_enable(struct drm_crtc *c,
+					   struct drm_crtc_state *old_state)
 {
 	struct drm_device *dev = c->dev;
 	struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
@@ -320,10 +321,10 @@ static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
 	.mode_set_nofb = atmel_hlcdc_crtc_mode_set_nofb,
 	.mode_set_base = drm_helper_crtc_mode_set_base,
 	.disable = atmel_hlcdc_crtc_disable,
-	.enable = atmel_hlcdc_crtc_enable,
 	.atomic_check = atmel_hlcdc_crtc_atomic_check,
 	.atomic_begin = atmel_hlcdc_crtc_atomic_begin,
 	.atomic_flush = atmel_hlcdc_crtc_atomic_flush,
+	.atomic_enable = atmel_hlcdc_crtc_atomic_enable,
 };
 
 static void atmel_hlcdc_crtc_destroy(struct drm_crtc *c)

drivers/gpu/drm/drm_atomic_helper.c

@@ -1069,12 +1069,13 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 					      struct drm_atomic_state *old_state)
 {
 	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state;
 	struct drm_crtc_state *new_crtc_state;
 	struct drm_connector *connector;
 	struct drm_connector_state *new_conn_state;
 	int i;
 
-	for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
+	for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
 		const struct drm_crtc_helper_funcs *funcs;
 
 		/* Need to filter out CRTCs where only planes change. */
@@ -1090,8 +1091,8 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 			DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
 					 crtc->base.id, crtc->name);
 
-			if (funcs->enable)
-				funcs->enable(crtc);
+			if (funcs->atomic_enable)
+				funcs->atomic_enable(crtc, old_crtc_state);
 			else
 				funcs->commit(crtc);
 		}

drivers/gpu/drm/drm_simple_kms_helper.c

@@ -40,7 +40,8 @@ static int drm_simple_kms_crtc_check(struct drm_crtc *crtc,
 	return drm_atomic_add_affected_planes(state->state, crtc);
 }
 
-static void drm_simple_kms_crtc_enable(struct drm_crtc *crtc)
+static void drm_simple_kms_crtc_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 	struct drm_simple_display_pipe *pipe;
 
@@ -64,8 +65,8 @@ static void drm_simple_kms_crtc_disable(struct drm_crtc *crtc)
 
 static const struct drm_crtc_helper_funcs drm_simple_kms_crtc_helper_funcs = {
 	.atomic_check = drm_simple_kms_crtc_check,
+	.atomic_enable = drm_simple_kms_crtc_enable,
 	.disable = drm_simple_kms_crtc_disable,
-	.enable = drm_simple_kms_crtc_enable,
 };
 
 static const struct drm_crtc_funcs drm_simple_kms_crtc_funcs = {

drivers/gpu/drm/exynos/exynos_drm_crtc.c

@@ -21,7 +21,8 @@
 #include "exynos_drm_drv.h"
 #include "exynos_drm_plane.h"
 
-static void exynos_drm_crtc_enable(struct drm_crtc *crtc)
+static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
+					  struct drm_crtc_state *old_state)
 {
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 
@@ -82,11 +83,11 @@ static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
-	.enable		= exynos_drm_crtc_enable,
 	.disable	= exynos_drm_crtc_disable,
 	.atomic_check	= exynos_crtc_atomic_check,
 	.atomic_begin	= exynos_crtc_atomic_begin,
 	.atomic_flush	= exynos_crtc_atomic_flush,
+	.atomic_enable	= exynos_drm_crtc_atomic_enable,
 };
 
 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c

@@ -63,7 +63,8 @@ static void fsl_dcu_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 	clk_disable_unprepare(fsl_dev->pix_clk);
 }
 
-static void fsl_dcu_drm_crtc_enable(struct drm_crtc *crtc)
+static void fsl_dcu_drm_crtc_atomic_enable(struct drm_crtc *crtc,
+					   struct drm_crtc_state *old_state)
 {
 	struct drm_device *dev = crtc->dev;
 	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
@@ -133,7 +134,7 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = {
 	.atomic_disable = fsl_dcu_drm_crtc_atomic_disable,
 	.atomic_flush = fsl_dcu_drm_crtc_atomic_flush,
-	.enable = fsl_dcu_drm_crtc_enable,
+	.atomic_enable = fsl_dcu_drm_crtc_atomic_enable,
 	.mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb,
 };
 

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c

@@ -192,7 +192,8 @@ static struct drm_plane *hibmc_plane_init(struct hibmc_drm_private *priv)
 	return plane;
 }
 
-static void hibmc_crtc_enable(struct drm_crtc *crtc)
+static void hibmc_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_crtc_state *old_state)
 {
 	unsigned int reg;
 	struct hibmc_drm_private *priv = crtc->dev->dev_private;
@@ -453,11 +454,11 @@ static const struct drm_crtc_funcs hibmc_crtc_funcs = {
 };
 
 static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
-	.enable		= hibmc_crtc_enable,
 	.disable	= hibmc_crtc_disable,
 	.mode_set_nofb	= hibmc_crtc_mode_set_nofb,
 	.atomic_begin	= hibmc_crtc_atomic_begin,
 	.atomic_flush	= hibmc_crtc_atomic_flush,
+	.atomic_enable	= hibmc_crtc_atomic_enable,
 };
 
 int hibmc_de_init(struct hibmc_drm_private *priv)

drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c

@@ -467,7 +467,8 @@ static void ade_dump_regs(void __iomem *base)
 static void ade_dump_regs(void __iomem *base) { }
 #endif
 
-static void ade_crtc_enable(struct drm_crtc *crtc)
+static void ade_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	struct ade_crtc *acrtc = to_ade_crtc(crtc);
 	struct ade_hw_ctx *ctx = acrtc->ctx;
@@ -553,11 +554,11 @@ static void ade_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs ade_crtc_helper_funcs = {
-	.enable		= ade_crtc_enable,
 	.disable	= ade_crtc_disable,
 	.mode_set_nofb	= ade_crtc_mode_set_nofb,
 	.atomic_begin	= ade_crtc_atomic_begin,
 	.atomic_flush	= ade_crtc_atomic_flush,
+	.atomic_enable	= ade_crtc_atomic_enable,
 };
 
 static const struct drm_crtc_funcs ade_crtc_funcs = {

drivers/gpu/drm/imx/ipuv3-crtc.c

@@ -50,7 +50,8 @@ static inline struct ipu_crtc *to_ipu_crtc(struct drm_crtc *crtc)
 	return container_of(crtc, struct ipu_crtc, base);
 }
 
-static void ipu_crtc_enable(struct drm_crtc *crtc)
+static void ipu_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 	struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
@@ -293,7 +294,7 @@ static const struct drm_crtc_helper_funcs ipu_helper_funcs = {
 	.atomic_check = ipu_crtc_atomic_check,
 	.atomic_begin = ipu_crtc_atomic_begin,
 	.atomic_disable = ipu_crtc_atomic_disable,
-	.enable = ipu_crtc_enable,
+	.atomic_enable = ipu_crtc_atomic_enable,
 };
 
 static void ipu_put_resources(struct ipu_crtc *ipu_crtc)

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

@@ -366,7 +366,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
 	}
 }
 
-static void mtk_drm_crtc_enable(struct drm_crtc *crtc)
+static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 	struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
@@ -487,10 +488,10 @@ static const struct drm_crtc_funcs mtk_crtc_funcs = {
 static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
 	.mode_fixup	= mtk_drm_crtc_mode_fixup,
 	.mode_set_nofb	= mtk_drm_crtc_mode_set_nofb,
-	.enable		= mtk_drm_crtc_enable,
 	.disable	= mtk_drm_crtc_disable,
 	.atomic_begin	= mtk_drm_crtc_atomic_begin,
 	.atomic_flush	= mtk_drm_crtc_atomic_flush,
+	.atomic_enable	= mtk_drm_crtc_atomic_enable,
 };
 
 static int mtk_drm_crtc_init(struct drm_device *drm,

drivers/gpu/drm/meson/meson_crtc.c

@@ -79,7 +79,8 @@ static const struct drm_crtc_funcs meson_crtc_funcs = {
 
 };
 
-static void meson_crtc_enable(struct drm_crtc *crtc)
+static void meson_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_crtc_state *old_state)
 {
 	struct meson_crtc *meson_crtc = to_meson_crtc(crtc);
 	struct drm_crtc_state *crtc_state = crtc->state;
@@ -149,10 +150,10 @@ static void meson_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs meson_crtc_helper_funcs = {
-	.enable		= meson_crtc_enable,
 	.disable	= meson_crtc_disable,
 	.atomic_begin	= meson_crtc_atomic_begin,
 	.atomic_flush	= meson_crtc_atomic_flush,
+	.atomic_enable	= meson_crtc_atomic_enable,
 };
 
 void meson_crtc_irq(struct meson_drm *priv)

drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c

@@ -295,7 +295,8 @@ static void mdp4_crtc_disable(struct drm_crtc *crtc)
 	mdp4_crtc->enabled = false;
 }
 
-static void mdp4_crtc_enable(struct drm_crtc *crtc)
+static void mdp4_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
 {
 	struct mdp4_crtc *mdp4_crtc = to_mdp4_crtc(crtc);
 	struct mdp4_kms *mdp4_kms = get_kms(crtc);
@@ -493,10 +494,10 @@ static const struct drm_crtc_funcs mdp4_crtc_funcs = {
 static const struct drm_crtc_helper_funcs mdp4_crtc_helper_funcs = {
 	.mode_set_nofb = mdp4_crtc_mode_set_nofb,
 	.disable = mdp4_crtc_disable,
-	.enable = mdp4_crtc_enable,
 	.atomic_check = mdp4_crtc_atomic_check,
 	.atomic_begin = mdp4_crtc_atomic_begin,
 	.atomic_flush = mdp4_crtc_atomic_flush,
+	.atomic_enable = mdp4_crtc_atomic_enable,
 };
 
 static void mdp4_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus)

drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c

@@ -429,7 +429,8 @@ static void mdp5_crtc_disable(struct drm_crtc *crtc)
 	mdp5_crtc->enabled = false;
 }
 
-static void mdp5_crtc_enable(struct drm_crtc *crtc)
+static void mdp5_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
 {
 	struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
 	struct mdp5_crtc_state *mdp5_cstate = to_mdp5_crtc_state(crtc->state);
@@ -940,10 +941,10 @@ static const struct drm_crtc_funcs mdp5_crtc_no_lm_cursor_funcs = {
 static const struct drm_crtc_helper_funcs mdp5_crtc_helper_funcs = {
 	.mode_set_nofb = mdp5_crtc_mode_set_nofb,
 	.disable = mdp5_crtc_disable,
-	.enable = mdp5_crtc_enable,
 	.atomic_check = mdp5_crtc_atomic_check,
 	.atomic_begin = mdp5_crtc_atomic_begin,
 	.atomic_flush = mdp5_crtc_atomic_flush,
+	.atomic_enable = mdp5_crtc_atomic_enable,
 };
 
 static void mdp5_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus)

drivers/gpu/drm/omapdrm/omap_crtc.c

@@ -356,7 +356,8 @@ static void omap_crtc_arm_event(struct drm_crtc *crtc)
 	}
 }
 
-static void omap_crtc_enable(struct drm_crtc *crtc)
+static void omap_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
 {
 	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 	int ret;
@@ -568,10 +569,10 @@ static const struct drm_crtc_funcs omap_crtc_funcs = {
 static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
 	.mode_set_nofb = omap_crtc_mode_set_nofb,
 	.disable = omap_crtc_disable,
-	.enable = omap_crtc_enable,
 	.atomic_check = omap_crtc_atomic_check,
 	.atomic_begin = omap_crtc_atomic_begin,
 	.atomic_flush = omap_crtc_atomic_flush,
+	.atomic_enable = omap_crtc_atomic_enable,
 };
 
 /* -----------------------------------------------------------------------------

drivers/gpu/drm/qxl/qxl_display.c

@@ -447,7 +447,8 @@ static void qxl_mode_set_nofb(struct drm_crtc *crtc)
 
 }
 
-static void qxl_crtc_enable(struct drm_crtc *crtc)
+static void qxl_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	DRM_DEBUG("\n");
 }
@@ -466,8 +467,8 @@ static const struct drm_crtc_helper_funcs qxl_crtc_helper_funcs = {
 	.disable = qxl_crtc_disable,
 	.mode_fixup = qxl_crtc_mode_fixup,
 	.mode_set_nofb = qxl_mode_set_nofb,
-	.enable = qxl_crtc_enable,
 	.atomic_flush = qxl_crtc_atomic_flush,
+	.atomic_enable = qxl_crtc_atomic_enable,
 };
 
 static int qxl_primary_atomic_check(struct drm_plane *plane,

drivers/gpu/drm/rcar-du/rcar_du_crtc.c

@@ -552,7 +552,8 @@ void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc)
  * CRTC Functions
  */
 
-static void rcar_du_crtc_enable(struct drm_crtc *crtc)
+static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 
@@ -610,9 +611,9 @@ static void rcar_du_crtc_atomic_flush(struct drm_crtc *crtc,
 
 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 	.disable = rcar_du_crtc_disable,
-	.enable = rcar_du_crtc_enable,
 	.atomic_begin = rcar_du_crtc_atomic_begin,
 	.atomic_flush = rcar_du_crtc_atomic_flush,
+	.atomic_enable = rcar_du_crtc_atomic_enable,
 };
 
 static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -871,7 +871,8 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
 	return true;
 }
 
-static void vop_crtc_enable(struct drm_crtc *crtc)
+static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	struct vop *vop = to_vop(crtc);
 	const struct vop_data *vop_data = vop->data;
@@ -1079,11 +1080,11 @@ static void vop_crtc_atomic_begin(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs vop_crtc_helper_funcs = {
-	.enable = vop_crtc_enable,
 	.disable = vop_crtc_disable,
 	.mode_fixup = vop_crtc_mode_fixup,
 	.atomic_flush = vop_crtc_atomic_flush,
 	.atomic_begin = vop_crtc_atomic_begin,
+	.atomic_enable = vop_crtc_atomic_enable,
 };
 
 static void vop_crtc_destroy(struct drm_crtc *crtc)

drivers/gpu/drm/sti/sti_crtc.c

@@ -20,7 +20,8 @@
 #include "sti_vid.h"
 #include "sti_vtg.h"
 
-static void sti_crtc_enable(struct drm_crtc *crtc)
+static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	struct sti_mixer *mixer = to_sti_mixer(crtc);
 
@@ -222,10 +223,10 @@ static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
-	.enable = sti_crtc_enable,
 	.disable = sti_crtc_disabling,
 	.mode_set_nofb = sti_crtc_mode_set_nofb,
 	.atomic_flush = sti_crtc_atomic_flush,
+	.atomic_enable = sti_crtc_atomic_enable,
 };
 
 static void sti_crtc_destroy(struct drm_crtc *crtc)

drivers/gpu/drm/stm/ltdc.c

@@ -386,7 +386,8 @@ static void ltdc_crtc_load_lut(struct drm_crtc *crtc)
 				  ldev->clut[i]);
 }
 
-static void ltdc_crtc_enable(struct drm_crtc *crtc)
+static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
 {
 	struct ltdc_device *ldev = crtc_to_ltdc(crtc);
 
@@ -524,10 +525,10 @@ static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
 
 static struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
 	.load_lut = ltdc_crtc_load_lut,
-	.enable = ltdc_crtc_enable,
 	.disable = ltdc_crtc_disable,
 	.mode_set_nofb = ltdc_crtc_mode_set_nofb,
 	.atomic_flush = ltdc_crtc_atomic_flush,
+	.atomic_enable = ltdc_crtc_atomic_enable,
 };
 
 int ltdc_crtc_enable_vblank(struct drm_device *ddev, unsigned int pipe)

drivers/gpu/drm/sun4i/sun4i_crtc.c

@@ -86,7 +86,8 @@ static void sun4i_crtc_disable(struct drm_crtc *crtc)
 	}
 }
 
-static void sun4i_crtc_enable(struct drm_crtc *crtc)
+static void sun4i_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_crtc_state *old_state)
 {
 	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
 
@@ -98,8 +99,8 @@ static void sun4i_crtc_enable(struct drm_crtc *crtc)
 static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
 	.atomic_begin	= sun4i_crtc_atomic_begin,
 	.atomic_flush	= sun4i_crtc_atomic_flush,
+	.atomic_enable	= sun4i_crtc_atomic_enable,
 	.disable	= sun4i_crtc_disable,
-	.enable		= sun4i_crtc_enable,
 };
 
 static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)

drivers/gpu/drm/tegra/dc.c

@@ -1243,7 +1243,8 @@ static void tegra_crtc_disable(struct drm_crtc *crtc)
 	pm_runtime_put_sync(dc->dev);
 }
 
-static void tegra_crtc_enable(struct drm_crtc *crtc)
+static void tegra_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_crtc_state *old_state)
 {
 	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 	struct tegra_dc_state *state = to_dc_state(crtc->state);
@@ -1352,10 +1353,10 @@ static void tegra_crtc_atomic_flush(struct drm_crtc *crtc,
 
 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
 	.disable = tegra_crtc_disable,
-	.enable = tegra_crtc_enable,
 	.atomic_check = tegra_crtc_atomic_check,
 	.atomic_begin = tegra_crtc_atomic_begin,
 	.atomic_flush = tegra_crtc_atomic_flush,
+	.atomic_enable = tegra_crtc_atomic_enable,
 };
 
 static irqreturn_t tegra_dc_irq(int irq, void *data)

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

@@ -504,6 +504,12 @@ static void tilcdc_crtc_enable(struct drm_crtc *crtc)
 	mutex_unlock(&tilcdc_crtc->enable_lock);
 }
 
+static void tilcdc_crtc_atomic_enable(struct drm_crtc *crtc,
+				      struct drm_crtc_state *old_state)
+{
+	tilcdc_crtc_enable(crtc);
+}
+
 static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown)
 {
 	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
@@ -729,9 +735,9 @@ static const struct drm_crtc_funcs tilcdc_crtc_funcs = {
 
 static const struct drm_crtc_helper_funcs tilcdc_crtc_helper_funcs = {
 		.mode_fixup     = tilcdc_crtc_mode_fixup,
-		.enable		= tilcdc_crtc_enable,
 		.disable	= tilcdc_crtc_disable,
 		.atomic_check	= tilcdc_crtc_atomic_check,
+		.atomic_enable	= tilcdc_crtc_atomic_enable,
 };
 
 int tilcdc_crtc_max_width(struct drm_crtc *crtc)

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -533,7 +533,8 @@ static void vc4_crtc_disable(struct drm_crtc *crtc)
 	}
 }
 
-static void vc4_crtc_enable(struct drm_crtc *crtc)
+static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
 {
 	struct drm_device *dev = crtc->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
@@ -870,10 +871,10 @@ static const struct drm_crtc_funcs vc4_crtc_funcs = {
 static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
 	.mode_set_nofb = vc4_crtc_mode_set_nofb,
 	.disable = vc4_crtc_disable,
-	.enable = vc4_crtc_enable,
 	.mode_valid = vc4_crtc_mode_valid,
 	.atomic_check = vc4_crtc_atomic_check,
 	.atomic_flush = vc4_crtc_atomic_flush,
+	.atomic_enable = vc4_crtc_atomic_enable,
 };
 
 static const struct vc4_crtc_data pv0_data = {

drivers/gpu/drm/virtio/virtgpu_display.c

@@ -113,7 +113,8 @@ static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 				   crtc->mode.vdisplay, 0, 0);
 }
 
-static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
+static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
+					  struct drm_crtc_state *old_state)
 {
 }
 
@@ -145,11 +146,11 @@ static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
-	.enable        = virtio_gpu_crtc_enable,
 	.disable       = virtio_gpu_crtc_disable,
 	.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
 	.atomic_check  = virtio_gpu_crtc_atomic_check,
 	.atomic_flush  = virtio_gpu_crtc_atomic_flush,
+	.atomic_enable = virtio_gpu_crtc_atomic_enable,
 };
 
 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,

drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

@@ -203,7 +203,7 @@ static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 }
 
 /**
- * vmw_ldu_crtc_helper_enable - Noop
+ * vmw_ldu_crtc_atomic_enable - Noop
  *
  * @crtc: CRTC associated with the new screen
  *
@@ -212,7 +212,8 @@ static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
  * but since for LDU the display plane is closely tied to the
  * CRTC, it makes more sense to do those at plane update time.
  */
-static void vmw_ldu_crtc_helper_enable(struct drm_crtc *crtc)
+static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 }
 
@@ -376,12 +377,12 @@ drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
 };
 
 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
-	.enable = vmw_ldu_crtc_helper_enable,
 	.disable = vmw_ldu_crtc_helper_disable,
 	.mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
 	.atomic_flush = vmw_du_crtc_atomic_flush,
+	.atomic_enable = vmw_ldu_crtc_atomic_enable,
 };
 
 

drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

@@ -270,13 +270,14 @@ static void vmw_sou_crtc_helper_prepare(struct drm_crtc *crtc)
 }
 
 /**
- * vmw_sou_crtc_helper_enable - Noop
+ * vmw_sou_crtc_atomic_enable - Noop
  *
  * @crtc: CRTC associated with the new screen
  *
  * This is called after a mode set has been completed.
  */
-static void vmw_sou_crtc_helper_enable(struct drm_crtc *crtc)
+static void vmw_sou_crtc_atomic_enable(struct drm_crtc *crtc,
+				       struct drm_crtc_state *old_state)
 {
 }
 
@@ -573,12 +574,12 @@ drm_plane_helper_funcs vmw_sou_primary_plane_helper_funcs = {
 
 static const struct drm_crtc_helper_funcs vmw_sou_crtc_helper_funcs = {
 	.prepare = vmw_sou_crtc_helper_prepare,
-	.enable = vmw_sou_crtc_helper_enable,
 	.disable = vmw_sou_crtc_helper_disable,
 	.mode_set_nofb = vmw_sou_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
 	.atomic_flush = vmw_du_crtc_atomic_flush,
+	.atomic_enable = vmw_sou_crtc_atomic_enable,
 };
 
 

drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c

@@ -412,7 +412,8 @@ static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
 }
 
 
-static void vmw_stdu_crtc_helper_enable(struct drm_crtc *crtc)
+static void vmw_stdu_crtc_atomic_enable(struct drm_crtc *crtc,
+					struct drm_crtc_state *old_state)
 {
 	struct vmw_private *dev_priv;
 	struct vmw_screen_target_display_unit *stdu;
@@ -1415,12 +1416,12 @@ drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
 
 static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
 	.prepare = vmw_stdu_crtc_helper_prepare,
-	.enable = vmw_stdu_crtc_helper_enable,
 	.disable = vmw_stdu_crtc_helper_disable,
 	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
 	.atomic_flush = vmw_du_crtc_atomic_flush,
+	.atomic_enable = vmw_stdu_crtc_atomic_enable,
 };
 
 

drivers/gpu/drm/zte/zx_vou.c

@@ -350,7 +350,8 @@ static inline void vou_chn_set_update(struct zx_crtc *zcrtc)
 	zx_writel(zcrtc->chnreg + CHN_UPDATE, 1);
 }
 
-static void zx_crtc_enable(struct drm_crtc *crtc)
+static void zx_crtc_atomic_enable(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_state)
 {
 	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 	bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
@@ -490,9 +491,9 @@ static void zx_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs zx_crtc_helper_funcs = {
-	.enable = zx_crtc_enable,
 	.disable = zx_crtc_disable,
 	.atomic_flush = zx_crtc_atomic_flush,
+	.atomic_enable = zx_crtc_atomic_enable,
 };
 
 static int zx_vou_enable_vblank(struct drm_crtc *crtc)

include/drm/drm_modeset_helper_vtables.h

@@ -71,7 +71,7 @@ struct drm_crtc_helper_funcs {
 	 * This callback is used by the legacy CRTC helpers.  Atomic helpers
 	 * also support using this hook for enabling and disabling a CRTC to
 	 * facilitate transitions to atomic, but it is deprecated. Instead
-	 * @enable and @disable should be used.
+	 * @atomic_enable and @atomic_disable should be used.
 	 */
 	void (*dpms)(struct drm_crtc *crtc, int mode);
 
@@ -85,8 +85,8 @@ struct drm_crtc_helper_funcs {
 	 *
 	 * This callback is used by the legacy CRTC helpers.  Atomic helpers
 	 * also support using this hook for disabling a CRTC to facilitate
-	 * transitions to atomic, but it is deprecated. Instead @disable should
-	 * be used.
+	 * transitions to atomic, but it is deprecated. Instead @atomic_disable
+	 * should be used.
 	 */
 	void (*prepare)(struct drm_crtc *crtc);
 
@@ -100,8 +100,8 @@ struct drm_crtc_helper_funcs {
 	 *
 	 * This callback is used by the legacy CRTC helpers.  Atomic helpers
 	 * also support using this hook for enabling a CRTC to facilitate
-	 * transitions to atomic, but it is deprecated. Instead @enable should
-	 * be used.
+	 * transitions to atomic, but it is deprecated. Instead @atomic_enable
+	 * should be used.
 	 */
 	void (*commit)(struct drm_crtc *crtc);
 
@@ -222,7 +222,7 @@ struct drm_crtc_helper_funcs {
 	 * pipeline is suspended using either DPMS or the new "ACTIVE" property.
 	 * Which means register values set in this callback might get reset when
 	 * the CRTC is suspended, but not restored.  Such drivers should instead
-	 * move all their CRTC setup into the @enable callback.
+	 * move all their CRTC setup into the @atomic_enable callback.
 	 *
 	 * This callback is optional.
 	 */
@@ -297,7 +297,7 @@ struct drm_crtc_helper_funcs {
 	 * Atomic drivers don't need to implement it if there's no need to
 	 * disable anything at the CRTC level. To ensure that runtime PM
 	 * handling (using either DPMS or the new "ACTIVE" property) works
-	 * @disable must be the inverse of @enable for atomic drivers.
+	 * @disable must be the inverse of @atomic_enable for atomic drivers.
 	 * Atomic drivers should consider to use @atomic_disable instead of
 	 * this one.
 	 *
@@ -315,24 +315,6 @@ struct drm_crtc_helper_funcs {
 	 */
 	void (*disable)(struct drm_crtc *crtc);
 
-	/**
-	 * @enable:
-	 *
-	 * This callback should be used to enable the CRTC. With the atomic
-	 * drivers it is called before all encoders connected to this CRTC are
-	 * enabled through the encoder's own &drm_encoder_helper_funcs.enable
-	 * hook.  If that sequence is too simple drivers can just add their own
-	 * hooks and call it from this CRTC callback here by looping over all
-	 * encoders connected to it using for_each_encoder_on_crtc().
-	 *
-	 * This hook is used only by atomic helpers, for symmetry with @disable.
-	 * Atomic drivers don't need to implement it if there's no need to
-	 * enable anything at the CRTC level. To ensure that runtime PM handling
-	 * (using either DPMS or the new "ACTIVE" property) works
-	 * @enable must be the inverse of @disable for atomic drivers.
-	 */
-	void (*enable)(struct drm_crtc *crtc);
-
 	/**
 	 * @atomic_check:
 	 *
@@ -432,6 +414,30 @@ struct drm_crtc_helper_funcs {
 	void (*atomic_flush)(struct drm_crtc *crtc,
 			     struct drm_crtc_state *old_crtc_state);
 
+	/**
+	 * @atomic_enable:
+	 *
+	 * This callback should be used to enable the CRTC. With the atomic
+	 * drivers it is called before all encoders connected to this CRTC are
+	 * enabled through the encoder's own &drm_encoder_helper_funcs.enable
+	 * hook.  If that sequence is too simple drivers can just add their own
+	 * hooks and call it from this CRTC callback here by looping over all
+	 * encoders connected to it using for_each_encoder_on_crtc().
+	 *
+	 * This hook is used only by atomic helpers, for symmetry with
+	 * @atomic_disable. Atomic drivers don't need to implement it if there's
+	 * no need to enable anything at the CRTC level. To ensure that runtime
+	 * PM handling (using either DPMS or the new "ACTIVE" property) works
+	 * @atomic_enable must be the inverse of @atomic_disable for atomic
+	 * drivers.
+	 *
+	 * Drivers can use the @old_crtc_state input parameter if the operations
+	 * needed to enable the CRTC don't depend solely on the new state but
+	 * also on the transition between the old state and the new state.
+	 */
+	void (*atomic_enable)(struct drm_crtc *crtc,
+			      struct drm_crtc_state *old_crtc_state);
+
 	/**
 	 * @atomic_disable:
 	 *