Mixed need to have hdmi clock enabled to properly perform power on/off sequences, so add handling of this clock directly to the mixer driver. Dependency between hdmi clock and mixer module has been observed on Exynos4 based boards.
Suggested-by: Andrzej Hajda a.hajda@samsung.com Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/gpu/drm/exynos/exynos_mixer.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 820b76234ef4..e5ef1fccd8fb 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -72,6 +72,7 @@ struct mixer_resources { spinlock_t reg_slock; struct clk *mixer; struct clk *vp; + struct clk *hdmi; struct clk *sclk_mixer; struct clk *sclk_hdmi; struct clk *mout_mixer; @@ -774,6 +775,12 @@ static int mixer_resources_init(struct mixer_context *mixer_ctx) return -ENODEV; }
+ mixer_res->hdmi = devm_clk_get(dev, "hdmi"); + if (IS_ERR(mixer_res->hdmi)) { + dev_err(dev, "failed to get clock 'hdmi'\n"); + return -ENODEV; + } + mixer_res->sclk_hdmi = devm_clk_get(dev, "sclk_hdmi"); if (IS_ERR(mixer_res->sclk_hdmi)) { dev_err(dev, "failed to get clock 'sclk_hdmi'\n"); @@ -1095,6 +1102,7 @@ static void mixer_poweron(struct exynos_drm_manager *mgr) pm_runtime_get_sync(ctx->dev);
clk_prepare_enable(res->mixer); + clk_prepare_enable(res->hdmi); if (ctx->vp_enabled) { clk_prepare_enable(res->vp); if (ctx->has_sclk) @@ -1134,6 +1142,7 @@ static void mixer_poweroff(struct exynos_drm_manager *mgr) ctx->powered = false; mutex_unlock(&ctx->mixer_mutex);
+ clk_disable_unprepare(res->hdmi); clk_disable_unprepare(res->mixer); if (ctx->vp_enabled) { clk_disable_unprepare(res->vp);