From 049d34e94f9aa2c3ed22a7bad75dd188ec7dacb9 Mon Sep 17 00:00:00 2001 From: Rahul Sharma Date: Tue, 20 May 2014 10:36:05 +0530 Subject: drm/exynos: use regmap interface to set hdmiphy control bit in pmu Exynos drm hdmi driver used to get dummy hdmiphy clock to control the PMU bit for hdmiphy. This bit needs to be set before setting any resolution to hdmi hardware. This was handled using dummy hdmiphy clock which is removed here. PMU is already defined as system controller for exynos SoCs. Hdmi driver is modified to control the phy enable bit inside PMU using regmap interfaces. Devicetree binding document for hdmi is also updated. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_hdmi.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) (limited to 'drivers/gpu/drm/exynos/exynos_hdmi.c') diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index ed6176ebfbcd..941b235ca1db 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -38,6 +38,8 @@ #include #include #include +#include +#include #include @@ -81,7 +83,6 @@ struct hdmi_resources { struct clk *sclk_hdmi; struct clk *sclk_pixel; struct clk *sclk_hdmiphy; - struct clk *hdmiphy; struct clk *mout_hdmi; struct regulator_bulk_data *regul_bulk; int regul_count; @@ -208,6 +209,7 @@ struct hdmi_context { const struct hdmiphy_config *phy_confs; unsigned int phy_conf_count; + struct regmap *pmureg; enum hdmi_type type; }; @@ -2013,7 +2015,10 @@ static void hdmi_poweron(struct exynos_drm_display *display) if (regulator_bulk_enable(res->regul_count, res->regul_bulk)) DRM_DEBUG_KMS("failed to enable regulator bulk\n"); - clk_prepare_enable(res->hdmiphy); + /* set pmu hdmiphy control bit to enable hdmiphy */ + regmap_update_bits(hdata->pmureg, PMU_HDMI_PHY_CONTROL, + PMU_HDMI_PHY_ENABLE_BIT, 1); + clk_prepare_enable(res->hdmi); clk_prepare_enable(res->sclk_hdmi); @@ -2040,7 +2045,11 @@ static void hdmi_poweroff(struct exynos_drm_display *display) clk_disable_unprepare(res->sclk_hdmi); clk_disable_unprepare(res->hdmi); - clk_disable_unprepare(res->hdmiphy); + + /* reset pmu hdmiphy control bit to disable hdmiphy */ + regmap_update_bits(hdata->pmureg, PMU_HDMI_PHY_CONTROL, + PMU_HDMI_PHY_ENABLE_BIT, 0); + regulator_bulk_disable(res->regul_count, res->regul_bulk); pm_runtime_put_sync(hdata->dev); @@ -2143,11 +2152,6 @@ static int hdmi_resources_init(struct hdmi_context *hdata) DRM_ERROR("failed to get clock 'sclk_hdmiphy'\n"); goto fail; } - res->hdmiphy = devm_clk_get(dev, "hdmiphy"); - if (IS_ERR(res->hdmiphy)) { - DRM_ERROR("failed to get clock 'hdmiphy'\n"); - goto fail; - } res->mout_hdmi = devm_clk_get(dev, "mout_hdmi"); if (IS_ERR(res->mout_hdmi)) { DRM_ERROR("failed to get clock 'mout_hdmi'\n"); @@ -2383,6 +2387,13 @@ out_get_phy_port: goto err_hdmiphy; } + hdata->pmureg = syscon_regmap_lookup_by_phandle(dev->of_node, + "samsung,syscon-phandle"); + if (IS_ERR(hdata->pmureg)) { + DRM_ERROR("syscon regmap lookup failed.\n"); + goto err_hdmiphy; + } + pm_runtime_enable(dev); hdmi_display.ctx = hdata; -- cgit v1.2.3-55-g7522