On 19/02/2018 16:19, Daniel Vetter wrote:
> On Thu, Feb 15, 2018 at 11:19:36AM +0100, Neil Armstrong wrote:
>> The plane buffer address/stride/height was incorrectly updated in the
>> plane_atomic_update operation instead of the vsync irq.
>> This patch delays this operation in the vsync irq along with the
>> other plane delayed setup.
>>
>> This issue was masked using legacy framebuffer and X11 modesetting, but
>> is clearly visible using gbm rendering when buffer is submitted late after
>> vblank, like using software decoding and OpenGL rendering in Kodi.
>> With this patch, tearing and other artifacts disappears completely.
>
> You mean the frontbuffer rendering nature of X11 with all it's tearing
> made the issue not noticeable? I'm also not clear what you mean with
> legacy framebuffer ...
Yeah I don't have to correct technical terms, sorry.
>
> Either way looks reasonable:
> Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Thanks,
Pushed to drm-misc-fixes.
Neil
>
>> Cc: Michal Lazo <michal.lazo@xxxxxxxxx>
>> Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
>> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
>> ---
>> drivers/gpu/drm/meson/meson_crtc.c | 6 ++++++
>> drivers/gpu/drm/meson/meson_drv.h | 3 +++
>> drivers/gpu/drm/meson/meson_plane.c | 7 +++----
>> 3 files changed, 12 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c
>> index 5155f01..0552020 100644
>> --- a/drivers/gpu/drm/meson/meson_crtc.c
>> +++ b/drivers/gpu/drm/meson/meson_crtc.c
>> @@ -36,6 +36,7 @@
>> #include "meson_venc.h"
>> #include "meson_vpp.h"
>> #include "meson_viu.h"
>> +#include "meson_canvas.h"
>> #include "meson_registers.h"
>>
>> /* CRTC definition */
>> @@ -192,6 +193,11 @@ void meson_crtc_irq(struct meson_drm *priv)
>> } else
>> meson_vpp_disable_interlace_vscaler_osd1(priv);
>>
>> + meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
>> + priv->viu.osd1_addr, priv->viu.osd1_stride,
>> + priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
>> + MESON_CANVAS_BLKMODE_LINEAR);
>> +
>> /* Enable OSD1 */
>> writel_bits_relaxed(VPP_OSD1_POSTBLEND, VPP_OSD1_POSTBLEND,
>> priv->io_base + _REG(VPP_MISC));
>> diff --git a/drivers/gpu/drm/meson/meson_drv.h b/drivers/gpu/drm/meson/meson_drv.h
>> index 5e8b392..8450d6ac 100644
>> --- a/drivers/gpu/drm/meson/meson_drv.h
>> +++ b/drivers/gpu/drm/meson/meson_drv.h
>> @@ -43,6 +43,9 @@ struct meson_drm {
>> bool osd1_commit;
>> uint32_t osd1_ctrl_stat;
>> uint32_t osd1_blk0_cfg[5];
>> + uint32_t osd1_addr;
>> + uint32_t osd1_stride;
>> + uint32_t osd1_height;
>> } viu;
>>
>> struct {
>> diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
>> index d0a6ac8..27bd350 100644
>> --- a/drivers/gpu/drm/meson/meson_plane.c
>> +++ b/drivers/gpu/drm/meson/meson_plane.c
>> @@ -164,10 +164,9 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
>> /* Update Canvas with buffer address */
>> gem = drm_fb_cma_get_gem_obj(fb, 0);
>>
>> - meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
>> - gem->paddr, fb->pitches[0],
>> - fb->height, MESON_CANVAS_WRAP_NONE,
>> - MESON_CANVAS_BLKMODE_LINEAR);
>> + priv->viu.osd1_addr = gem->paddr;
>> + priv->viu.osd1_stride = fb->pitches[0];
>> + priv->viu.osd1_height = fb->height;
>>
>> spin_unlock_irqrestore(&priv->drm->event_lock, flags);
>> }
>> --
>> 2.7.4
>>
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>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
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