From 80a9a059d4e4670bc7fbd6a10618feba93144911 Mon Sep 17 00:00:00 2001 From: Chris Zhong Date: Mon, 20 Feb 2017 16:02:23 +0800 Subject: [PATCH] drm/rockchip/dsi: add dw-mipi power domain support Reference the power domain incase dw-mipi power down when in use. Signed-off-by: Chris Zhong Reviewed-by: Sean Paul Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/1487577744-2855-8-git-send-email-zyw@rock-chips.com --- drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index f4e21da..f84f9ae2 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -294,6 +295,7 @@ struct dw_mipi_dsi { struct clk *pclk; struct clk *phy_cfg_clk; + int dpms_mode; unsigned int lane_mbps; /* per lane */ u32 channel; u32 lanes; @@ -924,6 +926,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder) { struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder); + if (dsi->dpms_mode != DRM_MODE_DPMS_ON) + return; + if (clk_prepare_enable(dsi->pclk)) { dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__); return; @@ -935,7 +940,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder) drm_panel_unprepare(dsi->panel); dw_mipi_dsi_disable(dsi); + pm_runtime_put(dsi->dev); clk_disable_unprepare(dsi->pclk); + dsi->dpms_mode = DRM_MODE_DPMS_OFF; } static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) @@ -951,11 +958,15 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) if (ret < 0) return; + if (dsi->dpms_mode == DRM_MODE_DPMS_ON) + return; + if (clk_prepare_enable(dsi->pclk)) { dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__); return; } + pm_runtime_get_sync(dsi->dev); dw_mipi_dsi_init(dsi); dw_mipi_dsi_dpi_config(dsi, mode); dw_mipi_dsi_packet_handler_config(dsi); @@ -991,6 +1002,7 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val); dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG"); + dsi->dpms_mode = DRM_MODE_DPMS_ON; } static int @@ -1158,6 +1170,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, dsi->dev = dev; dsi->pdata = pdata; + dsi->dpms_mode = DRM_MODE_DPMS_OFF; ret = rockchip_mipi_parse_dt(dsi); if (ret) @@ -1237,6 +1250,8 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, goto err_pllref; } + pm_runtime_enable(dev); + dsi->dsi_host.ops = &dw_mipi_dsi_host_ops; dsi->dsi_host.dev = dev; ret = mipi_dsi_host_register(&dsi->dsi_host); @@ -1269,6 +1284,7 @@ static void dw_mipi_dsi_unbind(struct device *dev, struct device *master, struct dw_mipi_dsi *dsi = dev_get_drvdata(dev); mipi_dsi_host_unregister(&dsi->dsi_host); + pm_runtime_disable(dev); clk_disable_unprepare(dsi->pllref_clk); } -- 2.7.4