drm/exynos: fimd: fix window clear code
To correctly disable hardware window during driver init, both enable bits (WINCONx_ENWIN in WINCON and SHADOWCON_CHx_ENABLE in SHADOWCON) must be cleared, otherwise hardware fails to re-enable such window later. While touching this function, also temporarily disable ctx->suspended flag to let fimd_wait_for_vblank function really to do its job. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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@ -214,7 +214,6 @@ static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr)
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DRM_DEBUG_KMS("vblank wait timed out.\n");
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DRM_DEBUG_KMS("vblank wait timed out.\n");
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}
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}
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static void fimd_clear_channel(struct exynos_drm_manager *mgr)
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static void fimd_clear_channel(struct exynos_drm_manager *mgr)
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{
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{
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struct fimd_context *ctx = mgr->ctx;
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struct fimd_context *ctx = mgr->ctx;
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@ -224,17 +223,31 @@ static void fimd_clear_channel(struct exynos_drm_manager *mgr)
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/* Check if any channel is enabled. */
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/* Check if any channel is enabled. */
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for (win = 0; win < WINDOWS_NR; win++) {
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for (win = 0; win < WINDOWS_NR; win++) {
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u32 val = readl(ctx->regs + SHADOWCON);
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u32 val = readl(ctx->regs + WINCON(win));
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if (val & SHADOWCON_CHx_ENABLE(win)) {
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val &= ~SHADOWCON_CHx_ENABLE(win);
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if (val & WINCONx_ENWIN) {
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writel(val, ctx->regs + SHADOWCON);
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/* wincon */
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val &= ~WINCONx_ENWIN;
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writel(val, ctx->regs + WINCON(win));
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/* unprotect windows */
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if (ctx->driver_data->has_shadowcon) {
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val = readl(ctx->regs + SHADOWCON);
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val &= ~SHADOWCON_CHx_ENABLE(win);
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writel(val, ctx->regs + SHADOWCON);
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}
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ch_enabled = 1;
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ch_enabled = 1;
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}
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}
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}
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}
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/* Wait for vsync, as disable channel takes effect at next vsync */
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/* Wait for vsync, as disable channel takes effect at next vsync */
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if (ch_enabled)
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if (ch_enabled) {
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unsigned int state = ctx->suspended;
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ctx->suspended = 0;
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fimd_wait_for_vblank(mgr);
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fimd_wait_for_vblank(mgr);
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ctx->suspended = state;
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}
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}
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}
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static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
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static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
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