drm/exynos: Add plane support with fimd

The exynos fimd supports 5 window overlays. Only one window overlay of
fimd is used by the crtc, so we need plane feature to use the rest
window overlays.

This creates one ioctl exynos specific - DRM_EXYNOS_PLANE_SET_ZPOS, it
is the ioctl to decide for user to assign which window overlay.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

9 files changed, 244 insertions, 15 deletions

diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile
index 0496d3ff2683..c99127214f8e 100644
--- a/drivers/gpu/drm/exynos/Makefile
+++ b/drivers/gpu/drm/exynos/Makefile
@@ -5,7 +5,8 @@
 ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/exynos
 exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o exynos_drm_connector.o \
                 exynos_drm_crtc.o exynos_drm_fbdev.o exynos_drm_fb.o \
-                exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o
+                exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o \
+                exynos_drm_plane.o
 
 obj-$(CONFIG_DRM_EXYNOS) += exynosdrm.o
 obj-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index a435c3390332..e1ce9fd5a160 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -380,6 +380,7 @@ int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
 
         exynos_crtc->pipe = nr;
         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
+        exynos_crtc->overlay.zpos = DEFAULT_ZPOS;
         crtc = &exynos_crtc->drm_crtc;
 
         private->crtc[nr] = crtc;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index b86a04bd9399..050684ceab9d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -36,6 +36,7 @@
 #include "exynos_drm_fbdev.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_gem.h"
+#include "exynos_drm_plane.h"
 
 #define DRIVER_NAME     "exynos-drm"
 #define DRIVER_DESC     "Samsung SoC DRM"
@@ -77,6 +78,12 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
                         goto err_crtc;
         }
 
+        for (nr = 0; nr < MAX_PLANE; nr++) {
+                ret = exynos_plane_init(dev, nr);
+                if (ret)
+                        goto err_crtc;
+        }
+
         ret = drm_vblank_init(dev, MAX_CRTC);
         if (ret)
                 goto err_crtc;
@@ -163,6 +170,8 @@ static struct drm_ioctl_desc exynos_ioctls[] = {
                         DRM_AUTH),
         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
+        DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
+                        DRM_UNLOCKED | DRM_AUTH),
 };
 
 static const struct file_operations exynos_drm_driver_fops = {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 8018798710df..8e8d8f0f8f33 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -33,6 +33,8 @@
 #include "drm.h"
 
 #define MAX_CRTC        2
+#define MAX_PLANE       5
+#define DEFAULT_ZPOS    -1
 
 struct drm_device;
 struct exynos_drm_overlay;
@@ -57,8 +59,8 @@ enum exynos_drm_output_type {
 struct exynos_drm_overlay_ops {
         void (*mode_set)(struct device *subdrv_dev,
                          struct exynos_drm_overlay *overlay);
-        void (*commit)(struct device *subdrv_dev);
-        void (*disable)(struct device *subdrv_dev);
+        void (*commit)(struct device *subdrv_dev, int zpos);
+        void (*disable)(struct device *subdrv_dev, int zpos);
 };
 
 /*
@@ -83,6 +85,7 @@ struct exynos_drm_overlay_ops {
  * @dma_addr: bus(accessed by dma) address to the memory region allocated
  *      for a overlay.
  * @vaddr: virtual memory addresss to this overlay.
+ * @zpos: order of overlay layer(z position).
  * @default_win: a window to be enabled.
  * @color_key: color key on or off.
  * @index_color: if using color key feature then this value would be used
@@ -111,6 +114,7 @@ struct exynos_drm_overlay {
         unsigned int pitch;
         dma_addr_t dma_addr;
         void __iomem *vaddr;
+        int zpos;
 
         bool default_win;
         bool color_key;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 4ff4a217c1d6..86b93dde219a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -294,12 +294,27 @@ void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
                 manager_ops->disable_vblank(manager->dev);
 }
 
-void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
+void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
+                                          void *data)
 {
         struct exynos_drm_manager *manager =
                 to_exynos_encoder(encoder)->manager;
         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
+        int zpos = DEFAULT_ZPOS;
+
+        if (data)
+                zpos = *(int *)data;
+
+        if (overlay_ops && overlay_ops->commit)
+                overlay_ops->commit(manager->dev, zpos);
+}
+
+void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
+{
+        struct exynos_drm_manager *manager =
+                to_exynos_encoder(encoder)->manager;
         int crtc = *(int *)data;
+        int zpos = DEFAULT_ZPOS;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
@@ -309,8 +324,7 @@ void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
          */
         manager->pipe = crtc;
 
-        if (overlay_ops && overlay_ops->commit)
-                overlay_ops->commit(manager->dev);
+        exynos_drm_encoder_crtc_plane_commit(encoder, &zpos);
 }
 
 void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder, void *data)
@@ -375,11 +389,15 @@ void exynos_drm_encoder_crtc_disable(struct drm_encoder *encoder, void *data)
         struct exynos_drm_manager *manager =
                 to_exynos_encoder(encoder)->manager;
         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
+        int zpos = DEFAULT_ZPOS;
 
         DRM_DEBUG_KMS("\n");
 
+        if (data)
+                zpos = *(int *)data;
+
         if (overlay_ops && overlay_ops->disable)
-                overlay_ops->disable(manager->dev);
+                overlay_ops->disable(manager->dev, zpos);
 }
 
 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.h b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
index 72f15b021c43..97b087a51cb6 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
@@ -39,6 +39,8 @@ void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
                             void (*fn)(struct drm_encoder *, void *));
 void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data);
 void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data);
+void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
+                                          void *data);
 void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data);
 void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder,
                                         void *data);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 0b76bc058bca..fe4172e48ad2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -161,12 +161,15 @@ static void fimd_apply(struct device *subdrv_dev)
         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
         struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
         struct fimd_win_data *win_data;
+        int i;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
-        win_data = &ctx->win_data[ctx->default_win];
-        if (win_data->enabled && (ovl_ops && ovl_ops->commit))
-                ovl_ops->commit(subdrv_dev);
+        for (i = 0; i < WINDOWS_NR; i++) {
+                win_data = &ctx->win_data[i];
+                if (win_data->enabled && (ovl_ops && ovl_ops->commit))
+                        ovl_ops->commit(subdrv_dev, i);
+        }
 
         if (mgr_ops && mgr_ops->commit)
                 mgr_ops->commit(subdrv_dev);
@@ -277,6 +280,7 @@ static void fimd_win_mode_set(struct device *dev,
 {
         struct fimd_context *ctx = get_fimd_context(dev);
         struct fimd_win_data *win_data;
+        int win;
         unsigned long offset;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
@@ -286,12 +290,19 @@ static void fimd_win_mode_set(struct device *dev,
                 return;
         }
 
+        win = overlay->zpos;
+        if (win == DEFAULT_ZPOS)
+                win = ctx->default_win;
+
+        if (win < 0 || win > WINDOWS_NR)
+                return;
+
         offset = overlay->fb_x * (overlay->bpp >> 3);
         offset += overlay->fb_y * overlay->pitch;
 
         DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
 
-        win_data = &ctx->win_data[ctx->default_win];
+        win_data = &ctx->win_data[win];
 
         win_data->offset_x = overlay->crtc_x;
         win_data->offset_y = overlay->crtc_y;
@@ -394,15 +405,18 @@ static void fimd_win_set_colkey(struct device *dev, unsigned int win)
         writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 }
 
-static void fimd_win_commit(struct device *dev)
+static void fimd_win_commit(struct device *dev, int zpos)
 {
         struct fimd_context *ctx = get_fimd_context(dev);
         struct fimd_win_data *win_data;
-        int win = ctx->default_win;
+        int win = zpos;
         unsigned long val, alpha, size;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
+        if (win == DEFAULT_ZPOS)
+                win = ctx->default_win;
+
         if (win < 0 || win > WINDOWS_NR)
                 return;
 
@@ -499,15 +513,18 @@ static void fimd_win_commit(struct device *dev)
         win_data->enabled = true;
 }
 
-static void fimd_win_disable(struct device *dev)
+static void fimd_win_disable(struct device *dev, int zpos)
 {
         struct fimd_context *ctx = get_fimd_context(dev);
         struct fimd_win_data *win_data;
-        int win = ctx->default_win;
+        int win = zpos;
         u32 val;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
+        if (win == DEFAULT_ZPOS)
+                win = ctx->default_win;
+
         if (win < 0 || win > WINDOWS_NR)
                 return;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
new file mode 100644
index 000000000000..c785e34ccff9
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include "drmP.h"
+
+#include "exynos_drm.h"
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_encoder.h"
+
+struct exynos_plane {
+        struct drm_plane                base;
+        struct exynos_drm_overlay       overlay;
+        bool                            enabled;
+};
+
+static int
+exynos_update_plane(struct drm_plane *plane, 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)
+{
+        struct exynos_plane *exynos_plane =
+                container_of(plane, struct exynos_plane, base);
+        struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
+        struct exynos_drm_crtc_pos pos;
+        unsigned int x = src_x >> 16;
+        unsigned int y = src_y >> 16;
+        int ret;
+
+        DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+        memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos));
+        pos.crtc_x = crtc_x;
+        pos.crtc_y = crtc_y;
+        pos.crtc_w = crtc_w;
+        pos.crtc_h = crtc_h;
+
+        pos.fb_x = x;
+        pos.fb_y = y;
+
+        /* TODO: scale feature */
+        ret = exynos_drm_overlay_update(overlay, fb, &crtc->mode, &pos);
+        if (ret < 0)
+                return ret;
+
+        exynos_drm_fn_encoder(crtc, overlay,
+                        exynos_drm_encoder_crtc_mode_set);
+        exynos_drm_fn_encoder(crtc, &overlay->zpos,
+                        exynos_drm_encoder_crtc_plane_commit);
+
+        exynos_plane->enabled = true;
+
+        return 0;
+}
+
+static int exynos_disable_plane(struct drm_plane *plane)
+{
+        struct exynos_plane *exynos_plane =
+                container_of(plane, struct exynos_plane, base);
+        struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
+
+        DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+        if (!exynos_plane->enabled)
+                return 0;
+
+        exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
+                        exynos_drm_encoder_crtc_disable);
+
+        exynos_plane->enabled = false;
+        exynos_plane->overlay.zpos = DEFAULT_ZPOS;
+
+        return 0;
+}
+
+static void exynos_plane_destroy(struct drm_plane *plane)
+{
+        struct exynos_plane *exynos_plane =
+                container_of(plane, struct exynos_plane, base);
+
+        DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+        exynos_disable_plane(plane);
+        drm_plane_cleanup(plane);
+        kfree(exynos_plane);
+}
+
+static struct drm_plane_funcs exynos_plane_funcs = {
+        .update_plane   = exynos_update_plane,
+        .disable_plane  = exynos_disable_plane,
+        .destroy        = exynos_plane_destroy,
+};
+
+int exynos_plane_init(struct drm_device *dev, unsigned int nr)
+{
+        struct exynos_plane *exynos_plane;
+        uint32_t possible_crtcs;
+
+        exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
+        if (!exynos_plane)
+                return -ENOMEM;
+
+        /* all CRTCs are available */
+        possible_crtcs = (1 << MAX_CRTC) - 1;
+
+        exynos_plane->overlay.zpos = DEFAULT_ZPOS;
+
+        /* TODO: format */
+        return drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
+                              &exynos_plane_funcs, NULL, 0);
+}
+
+int exynos_plane_set_zpos_ioctl(struct drm_device *dev, void *data,
+                                struct drm_file *file_priv)
+{
+        struct drm_exynos_plane_set_zpos *zpos_req = data;
+        struct drm_mode_object *obj;
+        struct drm_plane *plane;
+        struct exynos_plane *exynos_plane;
+        int ret = 0;
+
+        DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+        if (!drm_core_check_feature(dev, DRIVER_MODESET))
+                return -EINVAL;
+
+        if (zpos_req->zpos < 0 || zpos_req->zpos >= MAX_PLANE) {
+                if (zpos_req->zpos != DEFAULT_ZPOS) {
+                        DRM_ERROR("zpos not within limits\n");
+                        return -EINVAL;
+                }
+        }
+
+        mutex_lock(&dev->mode_config.mutex);
+
+        obj = drm_mode_object_find(dev, zpos_req->plane_id,
+                        DRM_MODE_OBJECT_PLANE);
+        if (!obj) {
+                DRM_DEBUG_KMS("Unknown plane ID %d\n",
+                              zpos_req->plane_id);
+                ret = -EINVAL;
+                goto out;
+        }
+
+        plane = obj_to_plane(obj);
+        exynos_plane = container_of(plane, struct exynos_plane, base);
+
+        exynos_plane->overlay.zpos = zpos_req->zpos;
+
+out:
+        mutex_unlock(&dev->mode_config.mutex);
+        return ret;
+}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.h b/drivers/gpu/drm/exynos/exynos_drm_plane.h
new file mode 100644
index 000000000000..16b71f8217e7
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+
+int exynos_plane_init(struct drm_device *dev, unsigned int nr);
+int exynos_plane_set_zpos_ioctl(struct drm_device *dev, void *data,
+                                struct drm_file *file_priv);