drm/exynos/decon5433: set STANDALONE_UPDATE_F also if planes are disabled

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.

v2: fixed clear-bit code (Thx Marek)
v3: use test_and_clear_bit (Thx Joonyoung)

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Tested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index ef7fcb5f044b830229fcc40c0054012719a3b802..09e8cc36948ee8fc0d68a501dfa57bbd18e886f3 100644 (file)
--- 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)