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SubjectRe: [PATCH v3 6/9] drm/komeda: Add komeda_framebuffer
On Fri, Dec 21, 2018 at 10:00:17AM +0000, james qian wang (Arm Technology China) wrote:
> komeda_framebuffer is for extending drm_framebuffer to add komeda own
> attributes and komeda specific fb handling.
>
> Changes in v3:
> - Fixed style problem found by checkpatch.pl --strict.
>
> Signed-off-by: James (Qian) Wang <james.qian.wang@arm.com>
> ---
> drivers/gpu/drm/arm/display/komeda/Makefile | 3 +-
> .../arm/display/komeda/komeda_framebuffer.c | 165 ++++++++++++++++++
> .../arm/display/komeda/komeda_framebuffer.h | 31 ++++
> 3 files changed, 198 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile b/drivers/gpu/drm/arm/display/komeda/Makefile
> index 394fc2aa434a..25beae900ed2 100644
> --- a/drivers/gpu/drm/arm/display/komeda/Makefile
> +++ b/drivers/gpu/drm/arm/display/komeda/Makefile
> @@ -8,7 +8,8 @@ komeda-y := \
> komeda_drv.o \
> komeda_dev.o \
> komeda_format_caps.o \
> - komeda_pipeline.o
> + komeda_pipeline.o \
> + komeda_framebuffer.o
>
> komeda-y += \
> d71/d71_dev.o
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> new file mode 100644
> index 000000000000..4ddd5314ca23
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> @@ -0,0 +1,165 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#include <drm/drm_gem.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include "komeda_framebuffer.h"
> +#include "komeda_dev.h"
> +
> +static void komeda_fb_destroy(struct drm_framebuffer *fb)
> +{
> + struct komeda_fb *kfb = to_kfb(fb);
> + u32 i;
> +
> + for (i = 0; i < fb->format->num_planes; i++)
> + drm_gem_object_put_unlocked(fb->obj[i]);
> +
> + drm_framebuffer_cleanup(fb);
> + kfree(kfb);
> +}
> +
> +static int komeda_fb_create_handle(struct drm_framebuffer *fb,
> + struct drm_file *file, u32 *handle)
> +{
> + return drm_gem_handle_create(file, fb->obj[0], handle);
> +}
> +
> +static const struct drm_framebuffer_funcs komeda_fb_funcs = {
> + .destroy = komeda_fb_destroy,
> + .create_handle = komeda_fb_create_handle,
> +};
> +
> +static int
> +komeda_fb_none_afbc_size_check(struct komeda_dev *mdev, struct komeda_fb *kfb,
> + struct drm_file *file,
> + const struct drm_mode_fb_cmd2 *mode_cmd)
Not sure what _none stands for here, but otherwise:

Acked-by: Liviu Dudau <liviu.dudau@arm.com>

Best regards,
Liviu

> +{
> + struct drm_framebuffer *fb = &kfb->base;
> + struct drm_gem_object *obj;
> + u32 min_size = 0;
> + u32 i;
> +
> + for (i = 0; i < fb->format->num_planes; i++) {
> + obj = drm_gem_object_lookup(file, mode_cmd->handles[i]);
> + if (!obj) {
> + DRM_DEBUG_KMS("Failed to lookup GEM object\n");
> + fb->obj[i] = NULL;
> +
> + return -ENOENT;
> + }
> +
> + kfb->aligned_w = fb->width / (i ? fb->format->hsub : 1);
> + kfb->aligned_h = fb->height / (i ? fb->format->vsub : 1);
> +
> + if (fb->pitches[i] % mdev->chip.bus_width) {
> + DRM_DEBUG_KMS("Pitch[%d]: 0x%x doesn't align to 0x%x\n",
> + i, fb->pitches[i], mdev->chip.bus_width);
> + drm_gem_object_put_unlocked(obj);
> + fb->obj[i] = NULL;
> +
> + return -EINVAL;
> + }
> +
> + min_size = ((kfb->aligned_h / kfb->format_caps->tile_size - 1)
> + * fb->pitches[i])
> + + (kfb->aligned_w * fb->format->cpp[i]
> + * kfb->format_caps->tile_size)
> + + fb->offsets[i];
> +
> + if (obj->size < min_size) {
> + DRM_DEBUG_KMS("Fail to check none afbc fb size.\n");
> + drm_gem_object_put_unlocked(obj);
> + fb->obj[i] = NULL;
> +
> + return -EINVAL;
> + }
> +
> + fb->obj[i] = obj;
> + }
> +
> + if (fb->format->num_planes == 3) {
> + if (fb->pitches[1] != fb->pitches[2]) {
> + DRM_DEBUG_KMS("The pitch[1] and [2] are not same\n");
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +struct drm_framebuffer *
> +komeda_fb_create(struct drm_device *dev, struct drm_file *file,
> + const struct drm_mode_fb_cmd2 *mode_cmd)
> +{
> + struct komeda_dev *mdev = dev->dev_private;
> + struct komeda_fb *kfb;
> + int ret = 0, i;
> +
> + kfb = kzalloc(sizeof(*kfb), GFP_KERNEL);
> + if (!kfb)
> + return ERR_PTR(-ENOMEM);
> +
> + kfb->format_caps = komeda_get_format_caps(&mdev->fmt_tbl,
> + mode_cmd->pixel_format,
> + mode_cmd->modifier[0]);
> + if (!kfb->format_caps) {
> + DRM_DEBUG_KMS("FMT %x is not supported.\n",
> + mode_cmd->pixel_format);
> + kfree(kfb);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + drm_helper_mode_fill_fb_struct(dev, &kfb->base, mode_cmd);
> +
> + ret = komeda_fb_none_afbc_size_check(mdev, kfb, file, mode_cmd);
> + if (ret < 0)
> + goto err_cleanup;
> +
> + ret = drm_framebuffer_init(dev, &kfb->base, &komeda_fb_funcs);
> + if (ret < 0) {
> + DRM_DEBUG_KMS("failed to initialize fb\n");
> +
> + goto err_cleanup;
> + }
> +
> + return &kfb->base;
> +
> +err_cleanup:
> + for (i = 0; i < kfb->base.format->num_planes; i++)
> + drm_gem_object_put_unlocked(kfb->base.obj[i]);
> +
> + kfree(kfb);
> + return ERR_PTR(ret);
> +}
> +
> +dma_addr_t
> +komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
> +{
> + struct drm_framebuffer *fb = &kfb->base;
> + const struct drm_gem_cma_object *obj;
> + u32 plane_x, plane_y, cpp, pitch, offset;
> +
> + if (plane > fb->format->num_planes) {
> + DRM_DEBUG_KMS("Out of max plane num.\n");
> + return -EINVAL;
> + }
> +
> + obj = drm_fb_cma_get_gem_obj(fb, plane);
> +
> + offset = fb->offsets[plane];
> + if (!fb->modifier) {
> + plane_x = x / (plane ? fb->format->hsub : 1);
> + plane_y = y / (plane ? fb->format->vsub : 1);
> + cpp = fb->format->cpp[plane];
> + pitch = fb->pitches[plane];
> + offset += plane_x * cpp * kfb->format_caps->tile_size +
> + (plane_y * pitch) / kfb->format_caps->tile_size;
> + }
> +
> + return obj->paddr + offset;
> +}
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
> new file mode 100644
> index 000000000000..383780013bb9
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
> @@ -0,0 +1,31 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#ifndef _KOMEDA_FRAMEBUFFER_H_
> +#define _KOMEDA_FRAMEBUFFER_H_
> +
> +/** struct komeda_fb - entend drm_framebuffer with komeda attribute */
> +struct komeda_fb {
> + /** @base: &drm_framebuffer */
> + struct drm_framebuffer base;
> + /* @format_caps: &komeda_format_caps */
> + const struct komeda_format_caps *format_caps;
> + /** @aligned_w: aligned frame buffer width */
> + u32 aligned_w;
> + /** @aligned_h: aligned frame buffer height */
> + u32 aligned_h;
> +};
> +
> +#define to_kfb(dfb) container_of(dfb, struct komeda_fb, base)
> +
> +struct drm_framebuffer *
> +komeda_fb_create(struct drm_device *dev, struct drm_file *file,
> + const struct drm_mode_fb_cmd2 *mode_cmd);
> +dma_addr_t
> +komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane);
> +bool komeda_fb_is_layer_supported(struct komeda_fb *kfb, u32 layer_type);
> +
> +#endif
> --
> 2.17.1
>

--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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