diff options
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 5f0d7802dc52..4c35d9b0c9c8 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -53,6 +53,7 @@ struct tegra_dsi { struct mipi_dsi_host host; struct regulator *vdd; + bool enabled; }; static inline struct tegra_dsi * @@ -436,6 +437,9 @@ static int tegra_output_dsi_enable(struct tegra_output *output) const u32 *pkt_seq; int err; + if (dsi->enabled) + return 0; + if (dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) { DRM_DEBUG_KMS("Non-burst video mode with sync pulses\n"); pkt_seq = pkt_seq_video_non_burst_sync_pulses; @@ -530,6 +534,8 @@ static int tegra_output_dsi_enable(struct tegra_output *output) value |= DSI_POWER_CONTROL_ENABLE; tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL); + dsi->enabled = true; + return 0; } @@ -539,6 +545,9 @@ static int tegra_output_dsi_disable(struct tegra_output *output) struct tegra_dsi *dsi = to_dsi(output); unsigned long value; + if (!dsi->enabled) + return 0; + /* disable DSI controller */ value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL); value &= DSI_POWER_CONTROL_ENABLE; @@ -568,6 +577,8 @@ static int tegra_output_dsi_disable(struct tegra_output *output) clk_disable(dsi->clk); + dsi->enabled = false; + return 0; } |