Subject: [PATCH] drm/komeda: Adds internal bpp computing for arm afbc only format YU08 YU10

From: "Lowry Li (Arm Technology China)" <[email protected]>

The drm_format_info doesn't have any cpp or block_size (both are zero)
information for arm only afbc format YU08/YU10. we need to compute it
by ourselves.

Changes since v1:
1. Removed redundant warning check in komeda_get_afbc_format_bpp();
2. Removed a redundant empty line;
3. Rebased the branch.

Signed-off-by: Lowry Li (Arm Technology China) <[email protected]>
---
.../gpu/drm/arm/display/komeda/komeda_format_caps.c | 19 +++++++++++++++++++
.../gpu/drm/arm/display/komeda/komeda_format_caps.h | 3 +++
.../gpu/drm/arm/display/komeda/komeda_framebuffer.c | 5 +++--
3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
index cd4d9f5..c9a1edb 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
@@ -35,6 +35,25 @@
return NULL;
}

+u32 komeda_get_afbc_format_bpp(const struct drm_format_info *info, u64 modifier)
+{
+ u32 bpp;
+
+ switch (info->format) {
+ case DRM_FORMAT_YUV420_8BIT:
+ bpp = 12;
+ break;
+ case DRM_FORMAT_YUV420_10BIT:
+ bpp = 15;
+ break;
+ default:
+ bpp = info->cpp[0] * 8;
+ break;
+ }
+
+ return bpp;
+}
+
/* Two assumptions
* 1. RGB always has YTR
* 2. Tiled RGB always has SC
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
index 3631910..32273cf 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
@@ -97,6 +97,9 @@ static inline const char *komeda_get_format_name(u32 fourcc, u64 modifier)
komeda_get_format_caps(struct komeda_format_caps_table *table,
u32 fourcc, u64 modifier);

+u32 komeda_get_afbc_format_bpp(const struct drm_format_info *info,
+ u64 modifier);
+
u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
u32 layer_type, u32 *n_fmts);

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
index 3b0a70e..1b01a62 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
@@ -43,7 +43,7 @@ static int komeda_fb_create_handle(struct drm_framebuffer *fb,
struct drm_framebuffer *fb = &kfb->base;
const struct drm_format_info *info = fb->format;
struct drm_gem_object *obj;
- u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks;
+ u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks, bpp;
u64 min_size;

obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
@@ -88,8 +88,9 @@ static int komeda_fb_create_handle(struct drm_framebuffer *fb,
kfb->offset_payload = ALIGN(n_blocks * AFBC_HEADER_SIZE,
alignment_header);

+ bpp = komeda_get_afbc_format_bpp(info, fb->modifier);
kfb->afbc_size = kfb->offset_payload + n_blocks *
- ALIGN(info->cpp[0] * AFBC_SUPERBLK_PIXELS,
+ ALIGN(bpp * AFBC_SUPERBLK_PIXELS / 8,
AFBC_SUPERBLK_ALIGNMENT);
min_size = kfb->afbc_size + fb->offsets[0];
if (min_size > obj->size) {
--
1.9.1


2019-08-12 10:54:15

by James Qian Wang

[permalink] [raw]
Subject: Re: drm/komeda: Adds internal bpp computing for arm afbc only format YU08 YU10

On Tue, Aug 06, 2019 at 06:31:56AM +0000, Lowry Li (Arm Technology China) wrote:
> From: "Lowry Li (Arm Technology China)" <[email protected]>
>
> The drm_format_info doesn't have any cpp or block_size (both are zero)
> information for arm only afbc format YU08/YU10. we need to compute it
> by ourselves.
>
> Changes since v1:
> 1. Removed redundant warning check in komeda_get_afbc_format_bpp();
> 2. Removed a redundant empty line;
> 3. Rebased the branch.
>
> Signed-off-by: Lowry Li (Arm Technology China) <[email protected]>
> ---
> .../gpu/drm/arm/display/komeda/komeda_format_caps.c | 19 +++++++++++++++++++
> .../gpu/drm/arm/display/komeda/komeda_format_caps.h | 3 +++
> .../gpu/drm/arm/display/komeda/komeda_framebuffer.c | 5 +++--
> 3 files changed, 25 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
> index cd4d9f5..c9a1edb 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c
> @@ -35,6 +35,25 @@
> return NULL;
> }
>
> +u32 komeda_get_afbc_format_bpp(const struct drm_format_info *info, u64 modifier)
> +{
> + u32 bpp;
> +
> + switch (info->format) {
> + case DRM_FORMAT_YUV420_8BIT:
> + bpp = 12;
> + break;
> + case DRM_FORMAT_YUV420_10BIT:
> + bpp = 15;
> + break;
> + default:
> + bpp = info->cpp[0] * 8;
> + break;
> + }
> +
> + return bpp;
> +}
> +
> /* Two assumptions
> * 1. RGB always has YTR
> * 2. Tiled RGB always has SC
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
> index 3631910..32273cf 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h
> @@ -97,6 +97,9 @@ static inline const char *komeda_get_format_name(u32 fourcc, u64 modifier)
> komeda_get_format_caps(struct komeda_format_caps_table *table,
> u32 fourcc, u64 modifier);
>
> +u32 komeda_get_afbc_format_bpp(const struct drm_format_info *info,
> + u64 modifier);
> +
> u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
> u32 layer_type, u32 *n_fmts);
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> index 3b0a70e..1b01a62 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
> @@ -43,7 +43,7 @@ static int komeda_fb_create_handle(struct drm_framebuffer *fb,
> struct drm_framebuffer *fb = &kfb->base;
> const struct drm_format_info *info = fb->format;
> struct drm_gem_object *obj;
> - u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks;
> + u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks, bpp;
> u64 min_size;
>
> obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
> @@ -88,8 +88,9 @@ static int komeda_fb_create_handle(struct drm_framebuffer *fb,
> kfb->offset_payload = ALIGN(n_blocks * AFBC_HEADER_SIZE,
> alignment_header);
>
> + bpp = komeda_get_afbc_format_bpp(info, fb->modifier);
> kfb->afbc_size = kfb->offset_payload + n_blocks *
> - ALIGN(info->cpp[0] * AFBC_SUPERBLK_PIXELS,
> + ALIGN(bpp * AFBC_SUPERBLK_PIXELS / 8,
> AFBC_SUPERBLK_ALIGNMENT);
> min_size = kfb->afbc_size + fb->offsets[0];
> if (min_size > obj->size) {

Looks good to me.

Reviewed-by: James Qian Wang (Arm Technology China) <[email protected]>