From ccf034a9adb7aaca2ee8e5433f80191090f7d923 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Fri, 4 Sep 2015 17:15:46 -0300 Subject: [PATCH] drm/exynos: add pm_runtime to Mixer Let pm_runtime handle the enabling/disabling of the device with proper refcnt instead of rely on specific flags to track the enabled state. Changelog v2: - revive MXR_BIT_POWERED flag to keep current dpms mode. Signed-off-by: Gustavo Padovan Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_mixer.c | 106 ++++++++++++++++---------- 1 file changed, 64 insertions(+), 42 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index d09f8f9a8939..47777be1a754 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -1020,43 +1020,12 @@ static void mixer_enable(struct exynos_drm_crtc *crtc) { struct mixer_context *ctx = crtc->ctx; struct mixer_resources *res = &ctx->mixer_res; - int ret; if (test_bit(MXR_BIT_POWERED, &ctx->flags)) return; pm_runtime_get_sync(ctx->dev); - ret = clk_prepare_enable(res->mixer); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the mixer clk [%d]\n", ret); - return; - } - ret = clk_prepare_enable(res->hdmi); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the hdmi clk [%d]\n", ret); - return; - } - if (ctx->vp_enabled) { - ret = clk_prepare_enable(res->vp); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the vp clk [%d]\n", - ret); - return; - } - if (ctx->has_sclk) { - ret = clk_prepare_enable(res->sclk_mixer); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the " \ - "sclk_mixer clk [%d]\n", - ret); - return; - } - } - } - - set_bit(MXR_BIT_POWERED, &ctx->flags); - mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET); if (test_bit(MXR_BIT_VSYNC, &ctx->flags)) { @@ -1064,12 +1033,13 @@ static void mixer_enable(struct exynos_drm_crtc *crtc) mixer_reg_writemask(res, MXR_INT_EN, ~0, MXR_INT_EN_VSYNC); } mixer_win_reset(ctx); + + set_bit(MXR_BIT_POWERED, &ctx->flags); } static void mixer_disable(struct exynos_drm_crtc *crtc) { struct mixer_context *ctx = crtc->ctx; - struct mixer_resources *res = &ctx->mixer_res; int i; if (!test_bit(MXR_BIT_POWERED, &ctx->flags)) @@ -1081,17 +1051,9 @@ static void mixer_disable(struct exynos_drm_crtc *crtc) for (i = 0; i < MIXER_WIN_NR; i++) mixer_disable_plane(crtc, &ctx->planes[i]); - clear_bit(MXR_BIT_POWERED, &ctx->flags); + pm_runtime_put(ctx->dev); - clk_disable_unprepare(res->hdmi); - clk_disable_unprepare(res->mixer); - if (ctx->vp_enabled) { - clk_disable_unprepare(res->vp); - if (ctx->has_sclk) - clk_disable_unprepare(res->sclk_mixer); - } - - pm_runtime_put_sync(ctx->dev); + clear_bit(MXR_BIT_POWERED, &ctx->flags); } /* Only valid for Mixer version 16.0.33.0 */ @@ -1293,10 +1255,70 @@ static int mixer_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int exynos_mixer_suspend(struct device *dev) +{ + struct mixer_context *ctx = dev_get_drvdata(dev); + struct mixer_resources *res = &ctx->mixer_res; + + clk_disable_unprepare(res->hdmi); + clk_disable_unprepare(res->mixer); + if (ctx->vp_enabled) { + clk_disable_unprepare(res->vp); + if (ctx->has_sclk) + clk_disable_unprepare(res->sclk_mixer); + } + + return 0; +} + +static int exynos_mixer_resume(struct device *dev) +{ + struct mixer_context *ctx = dev_get_drvdata(dev); + struct mixer_resources *res = &ctx->mixer_res; + int ret; + + ret = clk_prepare_enable(res->mixer); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the mixer clk [%d]\n", ret); + return ret; + } + ret = clk_prepare_enable(res->hdmi); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the hdmi clk [%d]\n", ret); + return ret; + } + if (ctx->vp_enabled) { + ret = clk_prepare_enable(res->vp); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the vp clk [%d]\n", + ret); + return ret; + } + if (ctx->has_sclk) { + ret = clk_prepare_enable(res->sclk_mixer); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the " \ + "sclk_mixer clk [%d]\n", + ret); + return ret; + } + } + } + + return 0; +} +#endif + +static const struct dev_pm_ops exynos_mixer_pm_ops = { + SET_RUNTIME_PM_OPS(exynos_mixer_suspend, exynos_mixer_resume, NULL) +}; + struct platform_driver mixer_driver = { .driver = { .name = "exynos-mixer", .owner = THIS_MODULE, + .pm = &exynos_mixer_pm_ops, .of_match_table = mixer_match_types, }, .probe = mixer_probe, -- 2.20.1