2012/8/20 Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>:
> On 08/20/2012 11:23 AM, InKi Dae wrote:
>>
>> 2012/8/20 Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>:
>>>
>>> On 08/17/2012 06:50 PM, Inki Dae wrote:
>>>>
>>>> this patch adds buf_cnt variable in exynos_drm_fb structure and
>>>> that means a buffer count to drm framebuffer and also adds two
>>>> functions to get/set the buffer count from/to exynos_drm_fb structure.
>>>> if pixel format is not DRM_FORMAT_NV12MT then it gets a buffer count
>>>> to drm framebuffer refering to mode_cmd->handles and offsets.
>>>> but when booted, the buffer count will always be 1 because pixel
>>>> format of console framebuffer is RGB format.
>>>>
>>>> Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
>>>> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
>>>> ---
>>>> drivers/gpu/drm/exynos/exynos_drm_fb.c | 65
>>>> +++++++++++++++++++++++++++-
>>>> drivers/gpu/drm/exynos/exynos_drm_fb.h | 20 +++------
>>>> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 3 +
>>>> drivers/gpu/drm/exynos/exynos_drm_plane.c | 2 +-
>>>> 4 files changed, 73 insertions(+), 17 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c
>>>> b/drivers/gpu/drm/exynos/exynos_drm_fb.c
>>>> index 4ccfe43..2d1bc3a 100644
>>>> --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
>>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
>>>> @@ -41,10 +41,12 @@
>>>> * exynos specific framebuffer structure.
>>>> *
>>>> * @fb: drm framebuffer obejct.
>>>> + * @buf_cnt: a buffer count to drm framebuffer.
>>>> * @exynos_gem_obj: array of exynos specific gem object containing a
>>>> gem
>>>> object.
>>>> */
>>>> struct exynos_drm_fb {
>>>> struct drm_framebuffer fb;
>>>> + unsigned int buf_cnt;
>>>> struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
>>>> };
>>>> @@ -101,6 +103,25 @@ static struct drm_framebuffer_funcs
>>>> exynos_drm_fb_funcs = {
>>>> .dirty = exynos_drm_fb_dirty,
>>>> };
>>>> +void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
>>>> + unsigned int cnt)
>>>> +{
>>>> + struct exynos_drm_fb *exynos_fb;
>>>> +
>>>> + exynos_fb = to_exynos_fb(fb);
>>>> +
>>>> + exynos_fb->buf_cnt = cnt;
>>>> +}
>>>> +
>>>> +unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
>>>> +{
>>>> + struct exynos_drm_fb *exynos_fb;
>>>> +
>>>> + exynos_fb = to_exynos_fb(fb);
>>>> +
>>>> + return exynos_fb->buf_cnt;
>>>> +}
>>>> +
>>>> struct drm_framebuffer *
>>>> exynos_drm_framebuffer_init(struct drm_device *dev,
>>>> struct drm_mode_fb_cmd2 *mode_cmd,
>>>> @@ -127,6 +148,43 @@ exynos_drm_framebuffer_init(struct drm_device *dev,
>>>> return &exynos_fb->fb;
>>>> }
>>>> +static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2
>>>> *mode_cmd)
>>>> +{
>>>> + unsigned int cnt = 0;
>>>> +
>>>> + if (mode_cmd->pixel_format == DRM_FORMAT_NV12MT)
>>>> + return 2;
>>>> +
>>>> + while (cnt != MAX_FB_BUFFER) {
>>>> + if (!mode_cmd->handles[cnt])
>>>> + break;
>>>> + cnt++;
>>>> + }
>>>> +
>>>> + /*
>>>> + * check if NV12 or NV12M.
>>>> + *
>>>> + * NV12
>>>> + * handles[0] = base1, offsets[0] = 0
>>>> + * handles[1] = base1, offsets[1] = Y_size
>>>> + *
>>>> + * NV12M
>>>> + * handles[0] = base1, offsets[0] = 0
>>>> + * handles[1] = base2, offsets[1] = 0
>>>> + */
>>>> + if (cnt == 2) {
>>>> + /*
>>>> + * in case of NV12 format, offsets[1] is not 0 and
>>>> + * handles[0] is same as handles[1].
>>>> + */
>>>> + if (mode_cmd->offsets[1] &&
>>>> + mode_cmd->handles[0] == mode_cmd->handles[1])
>>>> + cnt = 1;
>>>> + }
>>>> +
>>>> + return cnt;
>>>> +}
>>>
>>>
>>> No, please don't add specific function. There is already
>>> drm_format_num_planes() function
>>>
>>>
>> I know that, but NV12M format is specific to Exynos. for this, we
>> already had a discussion and you can refer to below link,
>> http://web.archiveorange.com/archive/v/hhSc5JAv767vo7fKZLPf
>
>
> Yes, but this implementation is not clear, just get plane number using
> drm_format_num_planes()
> and check handle and offset argument when format is NV12.
>
drm_format_num_planes() doesn't include NV12MT format type so first
that format should be added and then we can get plane count using
drm_format_num_planes if not NV12. but if not,
exynos_drm_format_num_buffers() like below,
if (mode_cmd == DRM_FORMAT_NV12)
>
>>>> +
>>>> static struct drm_framebuffer *
>>>> exynos_user_fb_create(struct drm_device *dev, struct drm_file
>>>> *file_priv,
>>>> struct drm_mode_fb_cmd2 *mode_cmd)
>>>> @@ -134,7 +192,6 @@ exynos_user_fb_create(struct drm_device *dev, struct
>>>> drm_file *file_priv,
>>>> struct drm_gem_object *obj;
>>>> struct drm_framebuffer *fb;
>>>> struct exynos_drm_fb *exynos_fb;
>>>> - int nr;
>>>> int i;
>>>> DRM_DEBUG_KMS("%s\n", __FILE__);
>>>> @@ -152,9 +209,11 @@ exynos_user_fb_create(struct drm_device *dev,
>>>> struct
>>>> drm_file *file_priv,
>>>> }
>>>> exynos_fb = to_exynos_fb(fb);
>>>> - nr = exynos_drm_format_num_buffers(fb->pixel_format);
>>>> + exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
>>>> +
>>>> + DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
>>>> - for (i = 1; i < nr; i++) {
>>>> + for (i = 1; i < exynos_fb->buf_cnt; i++) {
>>>> obj = drm_gem_object_lookup(dev, file_priv,
>>>> mode_cmd->handles[i]);
>>>> if (!obj) {
>>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.h
>>>> b/drivers/gpu/drm/exynos/exynos_drm_fb.h
>>>> index 5082375..96262e5 100644
>>>> --- a/drivers/gpu/drm/exynos/exynos_drm_fb.h
>>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.h
>>>> @@ -28,19 +28,6 @@
>>>> #ifndef _EXYNOS_DRM_FB_H_
>>>> #define _EXYNOS_DRM_FB_H
>>>> -static inline int exynos_drm_format_num_buffers(uint32_t format)
>>>> -{
>>>> - switch (format) {
>>>> - case DRM_FORMAT_NV12:
>>>> - case DRM_FORMAT_NV12MT:
>>>> - return 2;
>>>> - case DRM_FORMAT_YUV420:
>>>> - return 3;
>>>> - default:
>>>> - return 1;
>>>> - }
>>>> -}
>>>> -
>>>> struct drm_framebuffer *
>>>> exynos_drm_framebuffer_init(struct drm_device *dev,
>>>> struct drm_mode_fb_cmd2 *mode_cmd,
>>>> @@ -52,4 +39,11 @@ struct exynos_drm_gem_buf
>>>> *exynos_drm_fb_buffer(struct
>>>> drm_framebuffer *fb,
>>>> void exynos_drm_mode_config_init(struct drm_device *dev);
>>>> +/* set a buffer count to drm framebuffer. */
>>>> +void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
>>>> + unsigned int cnt);
>>>> +
>>>> +/* get a buffer count to drm framebuffer. */
>>>> +unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb);
>>>> +
>>>> #endif
>>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>>>> b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>>>> index d5586cc..5b125fe 100644
>>>> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>>>> @@ -79,6 +79,9 @@ static int exynos_drm_fbdev_update(struct
>>>> drm_fb_helper
>>>> *helper,
>>>> return -EFAULT;
>>>> }
>>>> + /* buffer count to framebuffer always is 1 at booting time. */
>>>> + exynos_drm_fb_set_buf_cnt(fb, 1);
>>>> +
>>>> offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3);
>>>> offset += fbi->var.yoffset * fb->pitches[0];
>>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c
>>>> b/drivers/gpu/drm/exynos/exynos_drm_plane.c
>>>> index b89829e..777e142 100644
>>>> --- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
>>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
>>>> @@ -48,7 +48,7 @@ int exynos_plane_mode_set(struct drm_plane *plane,
>>>> struct drm_crtc *crtc,
>>>> DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
>>>> - nr = exynos_drm_format_num_buffers(fb->pixel_format);
>>>> + nr = exynos_drm_fb_get_buf_cnt(fb);
>>>> for (i = 0; i < nr; i++) {
>>>> struct exynos_drm_gem_buf *buffer =
>>>> exynos_drm_fb_buffer(fb, i);
>>>>
>>>
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>
>
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