drm/verisilicon: Add mode config funcs

Add mode setting functions for JH7110 SoC.

Signed-off-by: Keith Zhao <keith.zhao@starfivetech.com>
[cherry-pick : https://patchwork.kernel.org/project/linux-riscv/cover/20230602074043.33872-1-keith.zhao@starfivetech.com/]
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Change-Id: I42ab5eaf511a339a9e13e47e395ea47eb1f3c0fd

diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
index 30360e3..38254dc 100644 (file)
--- a/drivers/gpu/drm/verisilicon/Makefile
+++ b/drivers/gpu/drm/verisilicon/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 vs_drm-objs := vs_drv.o \
+               vs_fb.o \
                vs_gem.o
 
 obj-$(CONFIG_DRM_VERISILICON) += vs_drm.o

diff --git a/drivers/gpu/drm/verisilicon/vs_drv.c b/drivers/gpu/drm/verisilicon/vs_drv.c
index e0a2fc4..d84aacd 100644 (file)
--- a/drivers/gpu/drm/verisilicon/vs_drv.c
+++ b/drivers/gpu/drm/verisilicon/vs_drv.c
@@ -30,6 +30,7 @@
 #include <drm/drm_vblank.h>
 
 #include "vs_drv.h"
+#include "vs_fb.h"
 #include "vs_gem.h"
 
 #define DRV_NAME       "starfive"
@@ -118,6 +119,8 @@ static int vs_drm_bind(struct device *dev)
        if (ret)
                goto err_mode;
 
+       vs_mode_config_init(drm_dev);
+
        ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
        if (ret)
                goto err_bind;

diff --git a/drivers/gpu/drm/verisilicon/vs_fb.c b/drivers/gpu/drm/verisilicon/vs_fb.c
new file mode 100644 (file)
index 0000000..3e85f73
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_fb.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "vs_fb.h"
+#include "vs_gem.h"
+
+#define fourcc_mod_vs_get_type(val) \
+       (((val) & DRM_FORMAT_MOD_VS_TYPE_MASK) >> 54)
+
+static struct drm_framebuffer_funcs vs_fb_funcs = {
+       .create_handle  = drm_gem_fb_create_handle,
+       .destroy        = drm_gem_fb_destroy,
+       .dirty          = drm_atomic_helper_dirtyfb,
+};
+
+static struct drm_framebuffer *
+vs_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
+           struct vs_gem_object **obj, unsigned int num_planes)
+{
+       struct drm_framebuffer *fb;
+       int ret, i;
+
+       fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+       if (!fb)
+               return ERR_PTR(-ENOMEM);
+
+       drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
+
+       for (i = 0; i < num_planes; i++)
+               fb->obj[i] = &obj[i]->base;
+
+       ret = drm_framebuffer_init(dev, fb, &vs_fb_funcs);
+       if (ret) {
+               dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
+                       ret);
+               kfree(fb);
+               return ERR_PTR(ret);
+       }
+
+       return fb;
+}
+
+static struct drm_framebuffer *vs_fb_create(struct drm_device *dev,
+                                           struct drm_file *file_priv,
+                                           const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+       struct drm_framebuffer *fb;
+       const struct drm_format_info *info;
+       struct vs_gem_object *objs[MAX_NUM_PLANES];
+       struct drm_gem_object *obj;
+       unsigned int height, size;
+       unsigned char i, num_planes;
+       int ret = 0;
+
+       info = drm_get_format_info(dev, mode_cmd);
+       if (!info)
+               return ERR_PTR(-EINVAL);
+
+       num_planes = info->num_planes;
+       if (num_planes > MAX_NUM_PLANES)
+               return ERR_PTR(-EINVAL);
+
+       for (i = 0; i < num_planes; i++) {
+               obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
+               if (!obj) {
+                       dev_err(dev->dev, "Failed to lookup GEM object.\n");
+                       ret = -ENXIO;
+                       goto err;
+               }
+
+               height = drm_format_info_plane_height(info,
+                                                     mode_cmd->height, i);
+
+               size = height * mode_cmd->pitches[i] + mode_cmd->offsets[i];
+
+               if (obj->size < size) {
+                       drm_gem_object_put(obj);
+
+                       ret = -EINVAL;
+                       goto err;
+               }
+
+               objs[i] = to_vs_gem_object(obj);
+       }
+
+       fb = vs_fb_alloc(dev, mode_cmd, objs, i);
+       if (IS_ERR(fb)) {
+               ret = PTR_ERR(fb);
+               goto err;
+       }
+
+       return fb;
+
+err:
+       for (; i > 0; i--)
+               drm_gem_object_put(&objs[i - 1]->base);
+
+       return ERR_PTR(ret);
+}
+
+struct vs_gem_object *vs_fb_get_gem_obj(struct drm_framebuffer *fb,
+                                       unsigned char plane)
+{
+       if (plane > MAX_NUM_PLANES)
+               return NULL;
+
+       return to_vs_gem_object(fb->obj[plane]);
+}
+
+static const struct drm_format_info vs_formats[] = {
+       {.format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .char_per_block = { 20, 40, 0 },
+        .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true},
+       {.format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .char_per_block = { 20, 20, 20 },
+        .block_w = { 4, 4, 4 }, .block_h = { 4, 4, 4 }, .hsub = 1, .vsub = 1, .is_yuv = true},
+};
+
+static const struct drm_format_info *
+vs_lookup_format_info(const struct drm_format_info formats[],
+                     int num_formats, u32 format)
+{
+       int i;
+
+       for (i = 0; i < num_formats; i++) {
+               if (formats[i].format == format)
+                       return &formats[i];
+       }
+
+       return NULL;
+}
+
+static const struct drm_format_info *
+vs_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
+{
+       if (fourcc_mod_vs_get_type(cmd->modifier[0]) ==
+               DRM_FORMAT_MOD_VS_TYPE_CUSTOM_10BIT)
+               return vs_lookup_format_info(vs_formats, ARRAY_SIZE(vs_formats),
+                                                                        cmd->pixel_format);
+       else
+               return NULL;
+}
+
+static const struct drm_mode_config_funcs vs_mode_config_funcs = {
+       .fb_create                       = vs_fb_create,
+       .get_format_info         = vs_get_format_info,
+       .output_poll_changed = drm_fb_helper_output_poll_changed,
+       .atomic_check            = drm_atomic_helper_check,
+       .atomic_commit           = drm_atomic_helper_commit,
+};
+
+static struct drm_mode_config_helper_funcs vs_mode_config_helpers = {
+       .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+void vs_mode_config_init(struct drm_device *dev)
+{
+       dev->mode_config.fb_modifiers_not_supported = false;
+
+       if (dev->mode_config.max_width == 0 ||
+           dev->mode_config.max_height == 0) {
+               dev->mode_config.min_width  = 0;
+               dev->mode_config.min_height = 0;
+               dev->mode_config.max_width  = 4096;
+               dev->mode_config.max_height = 4096;
+       }
+       dev->mode_config.funcs = &vs_mode_config_funcs;
+       dev->mode_config.helper_private = &vs_mode_config_helpers;
+}

diff --git a/drivers/gpu/drm/verisilicon/vs_fb.h b/drivers/gpu/drm/verisilicon/vs_fb.h
new file mode 100644 (file)
index 0000000..78dda8e
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_fb.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_FB_H__
+#define __VS_FB_H__
+
+#define MAX_NUM_PLANES         3 /* colour format plane */
+
+struct vs_gem_object *vs_fb_get_gem_obj(struct drm_framebuffer *fb,
+                                       unsigned char plane);
+
+void vs_mode_config_init(struct drm_device *dev);
+#endif /* __VS_FB_H__ */