2017년 01월 13일 18:20에 Andrzej Hajda 이(가) 쓴 글:
> STANDALONE_UPDATE_F should be set if something changed in plane
> configurations,
> including plane disable.
> The patch fixes page-faults bugs, caused by decon still using framebuffers
> of disabled planes.
Excellent! Applied and this patch will go to -fixes with below another one[1],
[1] [PATCH] drm/exynos/decon5433: update shadow registers iff there are active
windows
Thanks.
>
> Signed-off-by: Andrzej Hajda <a.ha...@samsung.com>
> Tested-by: Joonyoung Shim <jy0922.s...@samsung.com>
> ---
> v2: fixed clear-bit code (Thx Marek)
> v3: use test_and_clear_bit (Thx Joonyoung)
> ---
> drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> index ef7fcb5..09e8cc3 100644
> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> @@ -46,7 +46,8 @@ enum decon_flag_bits {
> BIT_CLKS_ENABLED,
> BIT_IRQS_ENABLED,
> BIT_WIN_UPDATED,
> - BIT_SUSPENDED
> + BIT_SUSPENDED,
> + BIT_REQUEST_UPDATE
> };
>
> struct decon_context {
> @@ -313,6 +314,7 @@ static void decon_update_plane(struct exynos_drm_crtc
> *crtc,
>
> /* window enable */
> decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
> + set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
> }
>
> static void decon_disable_plane(struct exynos_drm_crtc *crtc,
> @@ -325,6 +327,7 @@ static void decon_disable_plane(struct exynos_drm_crtc
> *crtc,
> return;
>
> decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
> + set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
> }
>
> static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
> @@ -338,8 +341,7 @@ static void decon_atomic_flush(struct exynos_drm_crtc
> *crtc)
> for (i = ctx->first_win; i < WINDOWS_NR; i++)
> decon_shadow_protect_win(ctx, i, false);
>
> - /* update iff there are active windows */
> - if (crtc->base.state->plane_mask)
> + if (test_and_clear_bit(BIT_REQUEST_UPDATE, &ctx->flags))
> decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
>
> if (ctx->out_type & IFTYPE_I80)
>
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