Convert the HLCDC driver to atomic mode-setting.

Signed-off-by: Boris Brezillon <boris.brezillon at free-electrons.com>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c   | 142 ++----
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c     |   4 +
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h     |   5 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c  |   4 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h  |   3 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c |   3 +
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c  | 556 +++++++++++++----------
 7 files changed, 383 insertions(+), 334 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 0409b90..a69c966 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -114,25 +114,17 @@ static void atmel_hlcdc_crtc_dpms(struct drm_crtc *c, int 
mode)
        crtc->dpms = mode;
 }

-static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,
-                                    struct drm_display_mode *mode,
-                                    struct drm_display_mode *adj,
-                                    int x, int y,
-                                    struct drm_framebuffer *old_fb)
+static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 {
        struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
        struct regmap *regmap = crtc->dc->hlcdc->regmap;
-       struct drm_plane *plane = c->primary;
-       struct drm_framebuffer *fb;
+       struct drm_display_mode *adj = &c->state->adjusted_mode;
        unsigned long mode_rate;
        struct videomode vm;
        unsigned long prate;
        unsigned int cfg;
        int div;

-       if (atmel_hlcdc_dc_mode_valid(crtc->dc, adj) != MODE_OK)
-               return -EINVAL;
-
        vm.vfront_porch = adj->crtc_vsync_start - adj->crtc_vdisplay;
        vm.vback_porch = adj->crtc_vtotal - adj->crtc_vsync_end;
        vm.vsync_len = adj->crtc_vsync_end - adj->crtc_vsync_start;
@@ -156,7 +148,7 @@ static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,
        cfg = ATMEL_HLCDC_CLKPOL;

        prate = clk_get_rate(crtc->dc->hlcdc->sys_clk);
-       mode_rate = mode->crtc_clock * 1000;
+       mode_rate = adj->crtc_clock * 1000;
        if ((prate / 2) < mode_rate) {
                prate *= 2;
                cfg |= ATMEL_HLCDC_CLKSEL;
@@ -174,10 +166,10 @@ static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,

        cfg = 0;

-       if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+       if (adj->flags & DRM_MODE_FLAG_NVSYNC)
                cfg |= ATMEL_HLCDC_VSPOL;

-       if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+       if (adj->flags & DRM_MODE_FLAG_NHSYNC)
                cfg |= ATMEL_HLCDC_HSPOL;

        regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
@@ -187,34 +179,6 @@ static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,
                           ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
                           ATMEL_HLCDC_GUARDTIME_MASK,
                           cfg);
-
-       fb = plane->fb;
-       plane->fb = old_fb;
-
-       return atmel_hlcdc_plane_update_with_mode(plane, c, fb, 0, 0,
-                                                 adj->hdisplay, adj->vdisplay,
-                                                 x << 16, y << 16,
-                                                 adj->hdisplay << 16,
-                                                 adj->vdisplay << 16,
-                                                 adj);
-}
-
-int atmel_hlcdc_crtc_mode_set_base(struct drm_crtc *c, int x, int y,
-                                  struct drm_framebuffer *old_fb)
-{
-       struct drm_plane *plane = c->primary;
-       struct drm_framebuffer *fb = plane->fb;
-       struct drm_display_mode *mode = &c->hwmode;
-
-       plane->fb = old_fb;
-
-       return plane->funcs->update_plane(plane, c, fb,
-                                         0, 0,
-                                         mode->hdisplay,
-                                         mode->vdisplay,
-                                         x << 16, y << 16,
-                                         mode->hdisplay << 16,
-                                         mode->vdisplay << 16);
 }

 static void atmel_hlcdc_crtc_prepare(struct drm_crtc *crtc)
@@ -250,14 +214,48 @@ static void atmel_hlcdc_crtc_disable(struct drm_crtc 
*crtc)
        }
 }

+static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c,
+                                        struct drm_crtc_state *s)
+{
+       struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+       if (atmel_hlcdc_dc_mode_valid(crtc->dc, &s->adjusted_mode) != MODE_OK)
+               return -EINVAL;
+
+       return 0;
+}
+
+static void atmel_hlcdc_crtc_atomic_begin(struct drm_crtc *c)
+{
+       struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+       if (c->state->event) {
+               c->state->event->pipe = drm_crtc_index(c);
+
+               WARN_ON(drm_crtc_vblank_get(c) != 0);
+
+               crtc->event = c->state->event;
+               c->state->event = NULL;
+       }
+}
+
+static void atmel_hlcdc_crtc_atomic_flush(struct drm_crtc *crtc)
+{
+       /* TODO: write common plane control register if available */
+}
+
 static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
        .mode_fixup = atmel_hlcdc_crtc_mode_fixup,
        .dpms = atmel_hlcdc_crtc_dpms,
-       .mode_set = atmel_hlcdc_crtc_mode_set,
-       .mode_set_base = atmel_hlcdc_crtc_mode_set_base,
+       .mode_set = drm_helper_crtc_mode_set,
+       .mode_set_nofb = atmel_hlcdc_crtc_mode_set_nofb,
+       .mode_set_base = drm_helper_crtc_mode_set_base,
        .prepare = atmel_hlcdc_crtc_prepare,
        .commit = atmel_hlcdc_crtc_commit,
        .disable = atmel_hlcdc_crtc_disable,
+       .atomic_check = atmel_hlcdc_crtc_atomic_check,
+       .atomic_begin = atmel_hlcdc_crtc_atomic_begin,
+       .atomic_flush = atmel_hlcdc_crtc_atomic_flush,
 };

 static void atmel_hlcdc_crtc_destroy(struct drm_crtc *c)
@@ -306,61 +304,13 @@ void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
        atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
 }

-static int atmel_hlcdc_crtc_page_flip(struct drm_crtc *c,
-                                     struct drm_framebuffer *fb,
-                                     struct drm_pending_vblank_event *event,
-                                     uint32_t page_flip_flags)
-{
-       struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
-       struct atmel_hlcdc_plane_update_req req;
-       struct drm_plane *plane = c->primary;
-       struct drm_device *dev = c->dev;
-       unsigned long flags;
-       int ret = 0;
-
-       spin_lock_irqsave(&dev->event_lock, flags);
-       if (crtc->event)
-               ret = -EBUSY;
-       spin_unlock_irqrestore(&dev->event_lock, flags);
-
-       if (ret)
-               return ret;
-
-       memset(&req, 0, sizeof(req));
-       req.crtc_x = 0;
-       req.crtc_y = 0;
-       req.crtc_h = c->mode.crtc_vdisplay;
-       req.crtc_w = c->mode.crtc_hdisplay;
-       req.src_x = c->x << 16;
-       req.src_y = c->y << 16;
-       req.src_w = req.crtc_w << 16;
-       req.src_h = req.crtc_h << 16;
-       req.fb = fb;
-
-       ret = atmel_hlcdc_plane_prepare_update_req(plane, &req, &c->hwmode);
-       if (ret)
-               return ret;
-
-       if (event) {
-               drm_vblank_get(c->dev, crtc->id);
-               spin_lock_irqsave(&dev->event_lock, flags);
-               crtc->event = event;
-               spin_unlock_irqrestore(&dev->event_lock, flags);
-       }
-
-       ret = atmel_hlcdc_plane_apply_update_req(plane, &req);
-       if (ret)
-               crtc->event = NULL;
-       else
-               plane->fb = fb;
-
-       return ret;
-}
-
 static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = {
-       .page_flip = atmel_hlcdc_crtc_page_flip,
-       .set_config = drm_crtc_helper_set_config,
+       .page_flip = drm_atomic_helper_page_flip,
+       .set_config = drm_atomic_helper_set_config,
        .destroy = atmel_hlcdc_crtc_destroy,
+       .reset = drm_atomic_helper_crtc_reset,
+       .atomic_duplicate_state =  drm_atomic_helper_crtc_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 };

 int atmel_hlcdc_crtc_create(struct drm_device *dev)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 7320a6c..47fd147 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -222,6 +222,8 @@ static void atmel_hlcdc_fb_output_poll_changed(struct 
drm_device *dev)
 static const struct drm_mode_config_funcs mode_config_funcs = {
        .fb_create = atmel_hlcdc_fb_create,
        .output_poll_changed = atmel_hlcdc_fb_output_poll_changed,
+       .atomic_check = drm_atomic_helper_check,
+       .atomic_commit = drm_atomic_helper_commit,
 };

 static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
@@ -319,6 +321,8 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
                goto err_periph_clk_disable;
        }

+       drm_mode_config_reset(dev);
+
        ret = drm_vblank_init(dev, 1);
        if (ret < 0) {
                dev_err(dev->dev, "failed to initialize vblank\n");
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index 7bc96af..c18da22 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -26,11 +26,14 @@
 #include <linux/irqdomain.h>
 #include <linux/pwm.h>

+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_panel.h>
+#include <drm/drm_plane_helper.h>
 #include <drm/drmP.h>

 #include "atmel_hlcdc_layer.h"
@@ -69,7 +72,6 @@ struct atmel_hlcdc_dc_desc {
  */
 struct atmel_hlcdc_plane_properties {
        struct drm_property *alpha;
-       struct drm_property *rotation;
 };

 /**
@@ -84,7 +86,6 @@ struct atmel_hlcdc_plane {
        struct drm_plane base;
        struct atmel_hlcdc_layer layer;
        struct atmel_hlcdc_plane_properties *properties;
-       unsigned int rotation;
 };

 static inline struct atmel_hlcdc_plane *
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c
index 063d2a7..d1dca39 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c
@@ -298,7 +298,7 @@ void atmel_hlcdc_layer_irq(struct atmel_hlcdc_layer *layer)
        spin_unlock_irqrestore(&layer->lock, flags);
 }

-int atmel_hlcdc_layer_disable(struct atmel_hlcdc_layer *layer)
+void atmel_hlcdc_layer_disable(struct atmel_hlcdc_layer *layer)
 {
        struct atmel_hlcdc_layer_dma_channel *dma = &layer->dma;
        struct atmel_hlcdc_layer_update *upd = &layer->update;
@@ -340,8 +340,6 @@ int atmel_hlcdc_layer_disable(struct atmel_hlcdc_layer 
*layer)
        dma->status = ATMEL_HLCDC_LAYER_DISABLED;

        spin_unlock_irqrestore(&layer->lock, flags);
-
-       return 0;
 }

 int atmel_hlcdc_layer_update_start(struct atmel_hlcdc_layer *layer)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h
index 27e56c0..9beabc9 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h
@@ -120,6 +120,7 @@
 #define ATMEL_HLCDC_LAYER_DISCEN               BIT(11)
 #define ATMEL_HLCDC_LAYER_GA_SHIFT             16
 #define ATMEL_HLCDC_LAYER_GA_MASK              GENMASK(23, 
ATMEL_HLCDC_LAYER_GA_SHIFT)
+#define ATMEL_HLCDC_LAYER_GA(x)                        ((x) << 
ATMEL_HLCDC_LAYER_GA_SHIFT)

 #define ATMEL_HLCDC_LAYER_CSC_CFG(p, o)                
ATMEL_HLCDC_LAYER_CFG(p, (p)->desc->layout.csc + o)

@@ -376,7 +377,7 @@ int atmel_hlcdc_layer_init(struct drm_device *dev,
 void atmel_hlcdc_layer_cleanup(struct drm_device *dev,
                               struct atmel_hlcdc_layer *layer);

-int atmel_hlcdc_layer_disable(struct atmel_hlcdc_layer *layer);
+void atmel_hlcdc_layer_disable(struct atmel_hlcdc_layer *layer);

 int atmel_hlcdc_layer_update_start(struct atmel_hlcdc_layer *layer);

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
index b049f22..1e814c7 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -234,6 +234,9 @@ static const struct drm_connector_funcs 
atmel_hlcdc_panel_connector_funcs = {
        .detect = atmel_hlcdc_panel_connector_detect,
        .fill_modes = drm_helper_probe_single_connector_modes,
        .destroy = atmel_hlcdc_panel_connector_destroy,
+       .reset = drm_atomic_helper_connector_reset,
+       .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };

 static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
index c5892dc..4aa473c 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
@@ -19,6 +19,52 @@

 #include "atmel_hlcdc_dc.h"

+/**
+ * Atmel HLCDC Plane state structure.
+ *
+ * @base: DRM plane state
+ * @crtc_x: x position of the plane relative to the CRTC
+ * @crtc_y: y position of the plane relative to the CRTC
+ * @crtc_w: visible width of the plane
+ * @crtc_h: visible height of the plane
+ * @src_x: x buffer position
+ * @src_y: y buffer position
+ * @src_w: buffer width
+ * @src_h: buffer height
+ * @alpha: alpha blending of the plane
+ * @bpp: bytes per pixel deduced from pixel_format
+ * @offsets: offsets to apply to the GEM buffers
+ * @xstride: value to add to the pixel pointer between each line
+ * @pstride: value to add to the pixel pointer between each pixel
+ * @nplanes: number of planes (deduced from pixel_format)
+ */
+struct atmel_hlcdc_plane_state {
+       struct drm_plane_state base;
+       int crtc_x;
+       int crtc_y;
+       unsigned int crtc_w;
+       unsigned int crtc_h;
+       uint32_t src_x;
+       uint32_t src_y;
+       uint32_t src_w;
+       uint32_t src_h;
+
+       u8 alpha;
+
+       /* These fields are private and should not be touched */
+       int bpp[ATMEL_HLCDC_MAX_PLANES];
+       unsigned int offsets[ATMEL_HLCDC_MAX_PLANES];
+       int xstride[ATMEL_HLCDC_MAX_PLANES];
+       int pstride[ATMEL_HLCDC_MAX_PLANES];
+       int nplanes;
+};
+
+static inline struct atmel_hlcdc_plane_state *
+drm_plane_state_to_atmel_hlcdc_plane_state(struct drm_plane_state *s)
+{
+       return container_of(s, struct atmel_hlcdc_plane_state, base);
+}
+
 #define SUBPIXEL_MASK                  0xffff

 static uint32_t rgb_formats[] = {
@@ -128,7 +174,7 @@ static int atmel_hlcdc_format_to_plane_mode(u32 format, u32 
*mode)
        return 0;
 }

-static bool atmel_hlcdc_format_embedds_alpha(u32 format)
+static bool atmel_hlcdc_format_embeds_alpha(u32 format)
 {
        int i;

@@ -204,7 +250,7 @@ static u32 heo_upscaling_ycoef[] = {

 static void
 atmel_hlcdc_plane_update_pos_and_size(struct atmel_hlcdc_plane *plane,
-                               struct atmel_hlcdc_plane_update_req *req)
+                                     struct atmel_hlcdc_plane_state *state)
 {
        const struct atmel_hlcdc_layer_cfg_layout *layout =
                                                &plane->layer.desc->layout;
@@ -213,69 +259,69 @@ atmel_hlcdc_plane_update_pos_and_size(struct 
atmel_hlcdc_plane *plane,
                atmel_hlcdc_layer_update_cfg(&plane->layer,
                                             layout->size,
                                             0xffffffff,
-                                            (req->crtc_w - 1) |
-                                            ((req->crtc_h - 1) << 16));
+                                            (state->crtc_w - 1) |
+                                            ((state->crtc_h - 1) << 16));

        if (layout->memsize)
                atmel_hlcdc_layer_update_cfg(&plane->layer,
                                             layout->memsize,
                                             0xffffffff,
-                                            (req->src_w - 1) |
-                                            ((req->src_h - 1) << 16));
+                                            (state->src_w - 1) |
+                                            ((state->src_h - 1) << 16));

        if (layout->pos)
                atmel_hlcdc_layer_update_cfg(&plane->layer,
                                             layout->pos,
                                             0xffffffff,
-                                            req->crtc_x |
-                                            (req->crtc_y  << 16));
+                                            state->crtc_x |
+                                            (state->crtc_y  << 16));

        /* TODO: rework the rescaling part */
-       if (req->crtc_w != req->src_w || req->crtc_h != req->src_h) {
+       if (state->crtc_w != state->src_w || state->crtc_h != state->src_h) {
                u32 factor_reg = 0;

-               if (req->crtc_w != req->src_w) {
+               if (state->crtc_w != state->src_w) {
                        int i;
                        u32 factor;
                        u32 *coeff_tab = heo_upscaling_xcoef;
                        u32 max_memsize;

-                       if (req->crtc_w < req->src_w)
+                       if (state->crtc_w < state->src_w)
                                coeff_tab = heo_downscaling_xcoef;
                        for (i = 0; i < ARRAY_SIZE(heo_upscaling_xcoef); i++)
                                atmel_hlcdc_layer_update_cfg(&plane->layer,
                                                             17 + i,
                                                             0xffffffff,
                                                             coeff_tab[i]);
-                       factor = ((8 * 256 * req->src_w) - (256 * 4)) /
-                                req->crtc_w;
+                       factor = ((8 * 256 * state->src_w) - (256 * 4)) /
+                                state->crtc_w;
                        factor++;
-                       max_memsize = ((factor * req->crtc_w) + (256 * 4)) /
+                       max_memsize = ((factor * state->crtc_w) + (256 * 4)) /
                                      2048;
-                       if (max_memsize > req->src_w)
+                       if (max_memsize > state->src_w)
                                factor--;
                        factor_reg |= factor | 0x80000000;
                }

-               if (req->crtc_h != req->src_h) {
+               if (state->crtc_h != state->src_h) {
                        int i;
                        u32 factor;
                        u32 *coeff_tab = heo_upscaling_ycoef;
                        u32 max_memsize;

-                       if (req->crtc_w < req->src_w)
+                       if (state->crtc_w < state->src_w)
                                coeff_tab = heo_downscaling_ycoef;
                        for (i = 0; i < ARRAY_SIZE(heo_upscaling_ycoef); i++)
                                atmel_hlcdc_layer_update_cfg(&plane->layer,
                                                             33 + i,
                                                             0xffffffff,
                                                             coeff_tab[i]);
-                       factor = ((8 * 256 * req->src_w) - (256 * 4)) /
-                                req->crtc_w;
+                       factor = ((8 * 256 * state->src_w) - (256 * 4)) /
+                                state->crtc_w;
                        factor++;
-                       max_memsize = ((factor * req->crtc_w) + (256 * 4)) /
+                       max_memsize = ((factor * state->crtc_w) + (256 * 4)) /
                                      2048;
-                       if (max_memsize > req->src_w)
+                       if (max_memsize > state->src_w)
                                factor--;
                        factor_reg |= (factor << 16) | 0x80000000;
                }
@@ -287,7 +333,7 @@ atmel_hlcdc_plane_update_pos_and_size(struct 
atmel_hlcdc_plane *plane,

 static void
 atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
-                               struct atmel_hlcdc_plane_update_req *req)
+                                       struct atmel_hlcdc_plane_state *state)
 {
        const struct atmel_hlcdc_layer_cfg_layout *layout =
                                                &plane->layer.desc->layout;
@@ -297,10 +343,11 @@ atmel_hlcdc_plane_update_general_settings(struct 
atmel_hlcdc_plane *plane,
                cfg |= ATMEL_HLCDC_LAYER_OVR | ATMEL_HLCDC_LAYER_ITER2BL |
                       ATMEL_HLCDC_LAYER_ITER;

-               if (atmel_hlcdc_format_embedds_alpha(req->fb->pixel_format))
+               if 
(atmel_hlcdc_format_embeds_alpha(state->base.fb->pixel_format))
                        cfg |= ATMEL_HLCDC_LAYER_LAEN;
                else
-                       cfg |= ATMEL_HLCDC_LAYER_GAEN;
+                       cfg |= ATMEL_HLCDC_LAYER_GAEN |
+                              ATMEL_HLCDC_LAYER_GA(state->alpha);
        }

        atmel_hlcdc_layer_update_cfg(&plane->layer,
@@ -312,24 +359,26 @@ atmel_hlcdc_plane_update_general_settings(struct 
atmel_hlcdc_plane *plane,
                                     ATMEL_HLCDC_LAYER_ITER2BL |
                                     ATMEL_HLCDC_LAYER_ITER |
                                     ATMEL_HLCDC_LAYER_GAEN |
+                                    ATMEL_HLCDC_LAYER_GA_MASK |
                                     ATMEL_HLCDC_LAYER_LAEN |
                                     ATMEL_HLCDC_LAYER_OVR |
                                     ATMEL_HLCDC_LAYER_DMA, cfg);
 }

 static void atmel_hlcdc_plane_update_format(struct atmel_hlcdc_plane *plane,
-                               struct atmel_hlcdc_plane_update_req *req)
+                                       struct atmel_hlcdc_plane_state *state)
 {
        u32 cfg;
        int ret;

-       ret = atmel_hlcdc_format_to_plane_mode(req->fb->pixel_format, &cfg);
+       ret = atmel_hlcdc_format_to_plane_mode(state->base.fb->pixel_format,
+                                              &cfg);
        if (ret)
                return;

-       if ((req->fb->pixel_format == DRM_FORMAT_YUV422 ||
-            req->fb->pixel_format == DRM_FORMAT_NV61) &&
-           (plane->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))))
+       if ((state->base.fb->pixel_format == DRM_FORMAT_YUV422 ||
+            state->base.fb->pixel_format == DRM_FORMAT_NV61) &&
+           (state->base.rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))))
                cfg |= ATMEL_HLCDC_YUV422ROT;

        atmel_hlcdc_layer_update_cfg(&plane->layer,
@@ -341,7 +390,7 @@ static void atmel_hlcdc_plane_update_format(struct 
atmel_hlcdc_plane *plane,
         * Rotation optimization is not working on RGB888 (rotation is still
         * working but without any optimization).
         */
-       if (req->fb->pixel_format == DRM_FORMAT_RGB888)
+       if (state->base.fb->pixel_format == DRM_FORMAT_RGB888)
                cfg = ATMEL_HLCDC_LAYER_DMA_ROTDIS;
        else
                cfg = 0;
@@ -352,73 +401,44 @@ static void atmel_hlcdc_plane_update_format(struct 
atmel_hlcdc_plane *plane,
 }

 static void atmel_hlcdc_plane_update_buffers(struct atmel_hlcdc_plane *plane,
-                               struct atmel_hlcdc_plane_update_req *req)
+                                       struct atmel_hlcdc_plane_state *state)
 {
        struct atmel_hlcdc_layer *layer = &plane->layer;
        const struct atmel_hlcdc_layer_cfg_layout *layout =
                                                        &layer->desc->layout;
        int i;

-       atmel_hlcdc_layer_update_set_fb(&plane->layer, req->fb, req->offsets);
+       atmel_hlcdc_layer_update_set_fb(&plane->layer, state->base.fb,
+                                       state->offsets);

-       for (i = 0; i < req->nplanes; i++) {
+       for (i = 0; i < state->nplanes; i++) {
                if (layout->xstride[i]) {
                        atmel_hlcdc_layer_update_cfg(&plane->layer,
                                                layout->xstride[i],
                                                0xffffffff,
-                                               req->xstride[i]);
+                                               state->xstride[i]);
                }

                if (layout->pstride[i]) {
                        atmel_hlcdc_layer_update_cfg(&plane->layer,
                                                layout->pstride[i],
                                                0xffffffff,
-                                               req->pstride[i]);
+                                               state->pstride[i]);
                }
        }
 }

-static int atmel_hlcdc_plane_check_update_req(struct drm_plane *p,
-                               struct atmel_hlcdc_plane_update_req *req,
-                               const struct drm_display_mode *mode)
+static int atmel_hlcdc_plane_atomic_check(struct drm_plane *p,
+                                         struct drm_plane_state *s)
 {
        struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
+       struct atmel_hlcdc_plane_state *state =
+                               drm_plane_state_to_atmel_hlcdc_plane_state(s);
        const struct atmel_hlcdc_layer_cfg_layout *layout =
                                                &plane->layer.desc->layout;
-
-       if (!layout->size &&
-           (mode->hdisplay != req->crtc_w ||
-            mode->vdisplay != req->crtc_h))
-               return -EINVAL;
-
-       if (plane->layer.desc->max_height &&
-           req->crtc_h > plane->layer.desc->max_height)
-               return -EINVAL;
-
-       if (plane->layer.desc->max_width &&
-           req->crtc_w > plane->layer.desc->max_width)
-               return -EINVAL;
-
-       if ((req->crtc_h != req->src_h || req->crtc_w != req->src_w) &&
-           (!layout->memsize ||
-            atmel_hlcdc_format_embedds_alpha(req->fb->pixel_format)))
-               return -EINVAL;
-
-       if (req->crtc_x < 0 || req->crtc_y < 0)
-               return -EINVAL;
-
-       if (req->crtc_w + req->crtc_x > mode->hdisplay ||
-           req->crtc_h + req->crtc_y > mode->vdisplay)
-               return -EINVAL;
-
-       return 0;
-}
-
-int atmel_hlcdc_plane_prepare_update_req(struct drm_plane *p,
-                               struct atmel_hlcdc_plane_update_req *req,
-                               const struct drm_display_mode *mode)
-{
-       struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
+       struct drm_framebuffer *fb = state->base.fb;
+       const struct drm_display_mode *mode;
+       struct drm_crtc_state *crtc_state;
        unsigned int patched_crtc_w;
        unsigned int patched_crtc_h;
        unsigned int patched_src_w;
@@ -430,196 +450,202 @@ int atmel_hlcdc_plane_prepare_update_req(struct 
drm_plane *p,
        int vsub = 1;
        int i;

-       if ((req->src_x | req->src_y | req->src_w | req->src_h) &
+       if (!state->base.crtc || !fb)
+               return 0;
+
+       crtc_state = s->state->crtc_states[drm_crtc_index(s->crtc)];
+       mode = &crtc_state->adjusted_mode;
+
+       state->src_x = s->src_x;
+       state->src_y = s->src_y;
+       state->src_h = s->src_h;
+       state->src_w = s->src_w;
+       state->crtc_x = s->crtc_x;
+       state->crtc_y = s->crtc_y;
+       state->crtc_h = s->crtc_h;
+       state->crtc_w = s->crtc_w;
+       if ((state->src_x | state->src_y | state->src_w | state->src_h) &
            SUBPIXEL_MASK)
                return -EINVAL;

-       req->src_x >>= 16;
-       req->src_y >>= 16;
-       req->src_w >>= 16;
-       req->src_h >>= 16;
+       state->src_x >>= 16;
+       state->src_y >>= 16;
+       state->src_w >>= 16;
+       state->src_h >>= 16;

-       req->nplanes = drm_format_num_planes(req->fb->pixel_format);
-       if (req->nplanes > ATMEL_HLCDC_MAX_PLANES)
+       state->nplanes = drm_format_num_planes(fb->pixel_format);
+       if (state->nplanes > ATMEL_HLCDC_MAX_PLANES)
                return -EINVAL;

        /*
         * Swap width and size in case of 90 or 270 degrees rotation
         */
-       if (plane->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) {
-               tmp = req->crtc_w;
-               req->crtc_w = req->crtc_h;
-               req->crtc_h = tmp;
-               tmp = req->src_w;
-               req->src_w = req->src_h;
-               req->src_h = tmp;
+       if (state->base.rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) {
+               tmp = state->crtc_w;
+               state->crtc_w = state->crtc_h;
+               state->crtc_h = tmp;
+               tmp = state->src_w;
+               state->src_w = state->src_h;
+               state->src_h = tmp;
        }

-       if (req->crtc_x + req->crtc_w > mode->hdisplay)
-               patched_crtc_w = mode->hdisplay - req->crtc_x;
+       if (state->crtc_x + state->crtc_w > mode->hdisplay)
+               patched_crtc_w = mode->hdisplay - state->crtc_x;
        else
-               patched_crtc_w = req->crtc_w;
+               patched_crtc_w = state->crtc_w;

-       if (req->crtc_x < 0) {
-               patched_crtc_w += req->crtc_x;
-               x_offset = -req->crtc_x;
-               req->crtc_x = 0;
+       if (state->crtc_x < 0) {
+               patched_crtc_w += state->crtc_x;
+               x_offset = -state->crtc_x;
+               state->crtc_x = 0;
        }

-       if (req->crtc_y + req->crtc_h > mode->vdisplay)
-               patched_crtc_h = mode->vdisplay - req->crtc_y;
+       if (state->crtc_y + state->crtc_h > mode->vdisplay)
+               patched_crtc_h = mode->vdisplay - state->crtc_y;
        else
-               patched_crtc_h = req->crtc_h;
+               patched_crtc_h = state->crtc_h;

-       if (req->crtc_y < 0) {
-               patched_crtc_h += req->crtc_y;
-               y_offset = -req->crtc_y;
-               req->crtc_y = 0;
+       if (state->crtc_y < 0) {
+               patched_crtc_h += state->crtc_y;
+               y_offset = -state->crtc_y;
+               state->crtc_y = 0;
        }

-       patched_src_w = DIV_ROUND_CLOSEST(patched_crtc_w * req->src_w,
-                                         req->crtc_w);
-       patched_src_h = DIV_ROUND_CLOSEST(patched_crtc_h * req->src_h,
-                                         req->crtc_h);
+       patched_src_w = DIV_ROUND_CLOSEST(patched_crtc_w * state->src_w,
+                                         state->crtc_w);
+       patched_src_h = DIV_ROUND_CLOSEST(patched_crtc_h * state->src_h,
+                                         state->crtc_h);

-       hsub = drm_format_horz_chroma_subsampling(req->fb->pixel_format);
-       vsub = drm_format_vert_chroma_subsampling(req->fb->pixel_format);
+       hsub = drm_format_horz_chroma_subsampling(fb->pixel_format);
+       vsub = drm_format_vert_chroma_subsampling(fb->pixel_format);

-       for (i = 0; i < req->nplanes; i++) {
+       for (i = 0; i < state->nplanes; i++) {
                unsigned int offset = 0;
                int xdiv = i ? hsub : 1;
                int ydiv = i ? vsub : 1;

-               req->bpp[i] = drm_format_plane_cpp(req->fb->pixel_format, i);
-               if (!req->bpp[i])
+               state->bpp[i] = drm_format_plane_cpp(fb->pixel_format, i);
+               if (!state->bpp[i])
                        return -EINVAL;

-               switch (plane->rotation & 0xf) {
+               switch (state->base.rotation & 0xf) {
                case BIT(DRM_ROTATE_90):
-                       offset = ((y_offset + req->src_y + patched_src_w - 1) /
-                                 ydiv) * req->fb->pitches[i];
-                       offset += ((x_offset + req->src_x) / xdiv) *
-                                 req->bpp[i];
-                       req->xstride[i] = ((patched_src_w - 1) / ydiv) *
-                                         req->fb->pitches[i];
-                       req->pstride[i] = -req->fb->pitches[i] - req->bpp[i];
+                       offset = ((y_offset + state->src_y + patched_src_w - 1) 
/
+                                 ydiv) * fb->pitches[i];
+                       offset += ((x_offset + state->src_x) / xdiv) *
+                                 state->bpp[i];
+                       state->xstride[i] = ((patched_src_w - 1) / ydiv) *
+                                         fb->pitches[i];
+                       state->pstride[i] = -fb->pitches[i] - state->bpp[i];
                        break;
                case BIT(DRM_ROTATE_180):
-                       offset = ((y_offset + req->src_y + patched_src_h - 1) /
-                                 ydiv) * req->fb->pitches[i];
-                       offset += ((x_offset + req->src_x + patched_src_w - 1) /
-                                  xdiv) * req->bpp[i];
-                       req->xstride[i] = ((((patched_src_w - 1) / xdiv) - 1) *
-                                          req->bpp[i]) - req->fb->pitches[i];
-                       req->pstride[i] = -2 * req->bpp[i];
+                       offset = ((y_offset + state->src_y + patched_src_h - 1) 
/
+                                 ydiv) * fb->pitches[i];
+                       offset += ((x_offset + state->src_x + patched_src_w - 
1) /
+                                  xdiv) * state->bpp[i];
+                       state->xstride[i] = ((((patched_src_w - 1) / xdiv) - 1) 
*
+                                          state->bpp[i]) - fb->pitches[i];
+                       state->pstride[i] = -2 * state->bpp[i];
                        break;
                case BIT(DRM_ROTATE_270):
-                       offset = ((y_offset + req->src_y) / ydiv) *
-                                req->fb->pitches[i];
-                       offset += ((x_offset + req->src_x + patched_src_h - 1) /
-                                  xdiv) * req->bpp[i];
-                       req->xstride[i] = -(((patched_src_w - 1) / ydiv) *
-                                           req->fb->pitches[i]) -
-                                         (2 * req->bpp[i]);
-                       req->pstride[i] = req->fb->pitches[i] - req->bpp[i];
+                       offset = ((y_offset + state->src_y) / ydiv) *
+                                fb->pitches[i];
+                       offset += ((x_offset + state->src_x + patched_src_h - 
1) /
+                                  xdiv) * state->bpp[i];
+                       state->xstride[i] = -(((patched_src_w - 1) / ydiv) *
+                                           fb->pitches[i]) -
+                                         (2 * state->bpp[i]);
+                       state->pstride[i] = fb->pitches[i] - state->bpp[i];
                        break;
                case BIT(DRM_ROTATE_0):
                default:
-                       offset = ((y_offset + req->src_y) / ydiv) *
-                                req->fb->pitches[i];
-                       offset += ((x_offset + req->src_x) / xdiv) *
-                                 req->bpp[i];
-                       req->xstride[i] = req->fb->pitches[i] -
+                       offset = ((y_offset + state->src_y) / ydiv) *
+                                fb->pitches[i];
+                       offset += ((x_offset + state->src_x) / xdiv) *
+                                 state->bpp[i];
+                       state->xstride[i] = fb->pitches[i] -
                                          ((patched_src_w / xdiv) *
-                                          req->bpp[i]);
-                       req->pstride[i] = 0;
+                                          state->bpp[i]);
+                       state->pstride[i] = 0;
                        break;
                }

-               req->offsets[i] = offset + req->fb->offsets[i];
+               state->offsets[i] = offset + fb->offsets[i];
        }

-       req->src_w = patched_src_w;
-       req->src_h = patched_src_h;
-       req->crtc_w = patched_crtc_w;
-       req->crtc_h = patched_crtc_h;
+       state->src_w = patched_src_w;
+       state->src_h = patched_src_h;
+       state->crtc_w = patched_crtc_w;
+       state->crtc_h = patched_crtc_h;

-       return atmel_hlcdc_plane_check_update_req(p, req, mode);
-}
+       if (!layout->size &&
+           (mode->hdisplay != state->crtc_w ||
+            mode->vdisplay != state->crtc_h))
+               return -EINVAL;

-int atmel_hlcdc_plane_apply_update_req(struct drm_plane *p,
-                               struct atmel_hlcdc_plane_update_req *req)
-{
-       struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
-       int ret;
+       if (plane->layer.desc->max_height &&
+           state->crtc_h > plane->layer.desc->max_height)
+               return -EINVAL;

-       ret = atmel_hlcdc_layer_update_start(&plane->layer);
-       if (ret)
-               return ret;
+       if (plane->layer.desc->max_width &&
+           state->crtc_w > plane->layer.desc->max_width)
+               return -EINVAL;

-       atmel_hlcdc_plane_update_pos_and_size(plane, req);
-       atmel_hlcdc_plane_update_general_settings(plane, req);
-       atmel_hlcdc_plane_update_format(plane, req);
-       atmel_hlcdc_plane_update_buffers(plane, req);
+       if ((state->crtc_h != state->src_h || state->crtc_w != state->src_w) &&
+           (!layout->memsize ||
+            atmel_hlcdc_format_embeds_alpha(state->base.fb->pixel_format)))
+               return -EINVAL;

-       atmel_hlcdc_layer_update_commit(&plane->layer);
+       if (state->crtc_x < 0 || state->crtc_y < 0)
+               return -EINVAL;
+
+       if (state->crtc_w + state->crtc_x > mode->hdisplay ||
+           state->crtc_h + state->crtc_y > mode->vdisplay)
+               return -EINVAL;

        return 0;
 }

-int atmel_hlcdc_plane_update_with_mode(struct drm_plane *p,
-                                      struct drm_crtc *crtc,
-                                      struct drm_framebuffer *fb,
-                                      int crtc_x, int crtc_y,
-                                      unsigned int crtc_w,
-                                      unsigned int crtc_h,
-                                      uint32_t src_x, uint32_t src_y,
-                                      uint32_t src_w, uint32_t src_h,
-                                      const struct drm_display_mode *mode)
+static int atmel_hlcdc_plane_prepare_fb(struct drm_plane *p,
+                                       struct drm_framebuffer *fb)
 {
        struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
-       struct atmel_hlcdc_plane_update_req req;
-       int ret = 0;
-
-       memset(&req, 0, sizeof(req));
-       req.crtc_x = crtc_x;
-       req.crtc_y = crtc_y;
-       req.crtc_w = crtc_w;
-       req.crtc_h = crtc_h;
-       req.src_x = src_x;
-       req.src_y = src_y;
-       req.src_w = src_w;
-       req.src_h = src_h;
-       req.fb = fb;
-
-       ret = atmel_hlcdc_plane_prepare_update_req(&plane->base, &req, mode);
-       if (ret)
-               return ret;

-       if (!req.crtc_h || !req.crtc_w)
-               return atmel_hlcdc_layer_disable(&plane->layer);
+       return atmel_hlcdc_layer_update_start(&plane->layer);
+}
+
+static void atmel_hlcdc_plane_cleanup_fb(struct drm_plane *p,
+                                        struct drm_framebuffer *fb)
+{
+       struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);

-       return atmel_hlcdc_plane_apply_update_req(&plane->base, &req);
+       atmel_hlcdc_layer_update_rollback(&plane->layer);
 }

-static int atmel_hlcdc_plane_update(struct drm_plane *p,
-                                   struct drm_crtc *crtc,
-                                   struct drm_framebuffer *fb,
-                                   int crtc_x, int crtc_y,
-                                   unsigned int crtc_w, unsigned int crtc_h,
-                                   uint32_t src_x, uint32_t src_y,
-                                   uint32_t src_w, uint32_t src_h)
+static void atmel_hlcdc_plane_atomic_update(struct drm_plane *p,
+                                           struct drm_plane_state *old_s)
 {
-       return atmel_hlcdc_plane_update_with_mode(p, crtc, fb, crtc_x, crtc_y,
-                                                 crtc_w, crtc_h, src_x, src_y,
-                                                 src_w, src_h, &crtc->hwmode);
+       struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
+       struct atmel_hlcdc_plane_state *state =
+                       drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
+
+       if (!p->state->crtc || !p->state->fb)
+               return;
+
+       atmel_hlcdc_plane_update_pos_and_size(plane, state);
+       atmel_hlcdc_plane_update_general_settings(plane, state);
+       atmel_hlcdc_plane_update_format(plane, state);
+       atmel_hlcdc_plane_update_buffers(plane, state);
+
+       atmel_hlcdc_layer_update_commit(&plane->layer);
 }

-static int atmel_hlcdc_plane_disable(struct drm_plane *p)
+static void atmel_hlcdc_plane_atomic_disable(struct drm_plane *p,
+                                            struct drm_plane_state *old_state)
 {
        struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);

-       return atmel_hlcdc_layer_disable(&plane->layer);
+       atmel_hlcdc_layer_disable(&plane->layer);
 }

 static void atmel_hlcdc_plane_destroy(struct drm_plane *p)
@@ -635,38 +661,36 @@ static void atmel_hlcdc_plane_destroy(struct drm_plane *p)
        devm_kfree(p->dev->dev, plane);
 }

-static int atmel_hlcdc_plane_set_alpha(struct atmel_hlcdc_plane *plane,
-                                      u8 alpha)
+static int atmel_hlcdc_plane_atomic_set_property(struct drm_plane *p,
+                                                struct drm_plane_state *s,
+                                                struct drm_property *property,
+                                                uint64_t val)
 {
-       atmel_hlcdc_layer_update_start(&plane->layer);
-       atmel_hlcdc_layer_update_cfg(&plane->layer,
-                                    plane->layer.desc->layout.general_config,
-                                    ATMEL_HLCDC_LAYER_GA_MASK,
-                                    alpha << ATMEL_HLCDC_LAYER_GA_SHIFT);
-       atmel_hlcdc_layer_update_commit(&plane->layer);
-
-       return 0;
-}
+       struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
+       struct atmel_hlcdc_plane_properties *props = plane->properties;
+       struct atmel_hlcdc_plane_state *state =
+                       drm_plane_state_to_atmel_hlcdc_plane_state(s);

-static int atmel_hlcdc_plane_set_rotation(struct atmel_hlcdc_plane *plane,
-                                         unsigned int rotation)
-{
-       plane->rotation = rotation;
+       if (property == props->alpha)
+               state->alpha = val;
+       else
+               return -EINVAL;

        return 0;
 }

-static int atmel_hlcdc_plane_set_property(struct drm_plane *p,
-                                         struct drm_property *property,
-                                         uint64_t value)
+static int atmel_hlcdc_plane_atomic_get_property(struct drm_plane *p,
+                                       const struct drm_plane_state *s,
+                                       struct drm_property *property,
+                                       uint64_t *val)
 {
        struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
        struct atmel_hlcdc_plane_properties *props = plane->properties;
+       const struct atmel_hlcdc_plane_state *state =
+               container_of(s, const struct atmel_hlcdc_plane_state, base);

        if (property == props->alpha)
-               atmel_hlcdc_plane_set_alpha(plane, value);
-       else if (property == props->rotation)
-               atmel_hlcdc_plane_set_rotation(plane, value);
+               *val = state->alpha;
        else
                return -EINVAL;

@@ -694,8 +718,8 @@ static void atmel_hlcdc_plane_init_properties(struct 
atmel_hlcdc_plane *plane,

        if (desc->layout.xstride && desc->layout.pstride)
                drm_object_attach_property(&plane->base.base,
-                                          props->rotation,
-                                          BIT(DRM_ROTATE_0));
+                               plane->base.dev->mode_config.rotation_property,
+                               BIT(DRM_ROTATE_0));

        if (desc->layout.csc) {
                /*
@@ -717,11 +741,75 @@ static void atmel_hlcdc_plane_init_properties(struct 
atmel_hlcdc_plane *plane,
        }
 }

+static struct drm_plane_helper_funcs atmel_hlcdc_layer_plane_helper_funcs = {
+       .prepare_fb = atmel_hlcdc_plane_prepare_fb,
+       .cleanup_fb = atmel_hlcdc_plane_cleanup_fb,
+       .atomic_check = atmel_hlcdc_plane_atomic_check,
+       .atomic_update = atmel_hlcdc_plane_atomic_update,
+       .atomic_disable = atmel_hlcdc_plane_atomic_disable,
+};
+
+static void atmel_hlcdc_plane_reset(struct drm_plane *p)
+{
+       struct atmel_hlcdc_plane_state *state;
+
+       if (p->state) {
+               state = drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
+
+               if (state->base.fb)
+                       drm_framebuffer_unreference(state->base.fb);
+
+               kfree(state);
+               p->state = NULL;
+       }
+
+       state = kzalloc(sizeof(*state), GFP_KERNEL);
+       if (state) {
+               state->alpha = 255;
+               p->state = &state->base;
+               p->state->plane = p;
+       }
+}
+
+static struct drm_plane_state *
+atmel_hlcdc_plane_atomic_duplicate_state(struct drm_plane *p)
+{
+       struct atmel_hlcdc_plane_state *state =
+                       drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
+       struct atmel_hlcdc_plane_state *copy;
+
+       copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
+       if (!copy)
+               return NULL;
+
+       if (copy->base.fb)
+               drm_framebuffer_reference(copy->base.fb);
+
+       return &copy->base;
+}
+
+static void atmel_hlcdc_plane_atomic_destroy_state(struct drm_plane *plane,
+                                                  struct drm_plane_state *s)
+{
+       struct atmel_hlcdc_plane_state *state =
+                       drm_plane_state_to_atmel_hlcdc_plane_state(s);
+
+       if (s->fb)
+               drm_framebuffer_unreference(s->fb);
+
+       kfree(state);
+}
+
 static struct drm_plane_funcs layer_plane_funcs = {
-       .update_plane = atmel_hlcdc_plane_update,
-       .disable_plane = atmel_hlcdc_plane_disable,
-       .set_property = atmel_hlcdc_plane_set_property,
+       .update_plane = drm_atomic_helper_update_plane,
+       .disable_plane = drm_atomic_helper_disable_plane,
+       .set_property = drm_atomic_helper_plane_set_property,
        .destroy = atmel_hlcdc_plane_destroy,
+       .reset = atmel_hlcdc_plane_reset,
+       .atomic_duplicate_state = atmel_hlcdc_plane_atomic_duplicate_state,
+       .atomic_destroy_state = atmel_hlcdc_plane_atomic_destroy_state,
+       .atomic_set_property = atmel_hlcdc_plane_atomic_set_property,
+       .atomic_get_property = atmel_hlcdc_plane_atomic_get_property,
 };

 static struct atmel_hlcdc_plane *
@@ -755,6 +843,9 @@ atmel_hlcdc_plane_create(struct drm_device *dev,
        if (ret)
                return ERR_PTR(ret);

+       drm_plane_helper_add(&plane->base,
+                            &atmel_hlcdc_layer_plane_helper_funcs);
+
        /* Set default property values*/
        atmel_hlcdc_plane_init_properties(plane, desc, props);

@@ -774,12 +865,13 @@ atmel_hlcdc_plane_create_properties(struct drm_device 
*dev)
        if (!props->alpha)
                return ERR_PTR(-ENOMEM);

-       props->rotation = drm_mode_create_rotation_property(dev,
-                                               BIT(DRM_ROTATE_0) |
-                                               BIT(DRM_ROTATE_90) |
-                                               BIT(DRM_ROTATE_180) |
-                                               BIT(DRM_ROTATE_270));
-       if (!props->rotation)
+       dev->mode_config.rotation_property =
+                       drm_mode_create_rotation_property(dev,
+                                                         BIT(DRM_ROTATE_0) |
+                                                         BIT(DRM_ROTATE_90) |
+                                                         BIT(DRM_ROTATE_180) |
+                                                         BIT(DRM_ROTATE_270));
+       if (!dev->mode_config.rotation_property)
                return ERR_PTR(-ENOMEM);

        return props;
-- 
1.9.1

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