diff options
Diffstat (limited to 'drivers/video/tegra/dc/dsi.c')
| -rw-r--r-- | drivers/video/tegra/dc/dsi.c | 53 |
1 files changed, 44 insertions, 9 deletions
diff --git a/drivers/video/tegra/dc/dsi.c b/drivers/video/tegra/dc/dsi.c index 6624a8e8f52c..0ea3947176fe 100644 --- a/drivers/video/tegra/dc/dsi.c +++ b/drivers/video/tegra/dc/dsi.c @@ -416,6 +416,22 @@ static inline void tegra_dc_dsi_debug_create(struct tegra_dc_dsi_data *dsi) { } #endif +static inline void tegra_dsi_clk_enable(struct tegra_dc_dsi_data *dsi) +{ + if (!tegra_is_clk_enabled(dsi->dsi_clk)) { + clk_enable(dsi->dsi_clk); + clk_enable(dsi->dsi_fixed_clk); + } +} + +static inline void tegra_dsi_clk_disable(struct tegra_dc_dsi_data *dsi) +{ + if (tegra_is_clk_enabled(dsi->dsi_clk)) { + clk_disable(dsi->dsi_clk); + clk_disable(dsi->dsi_fixed_clk); + } +} + static int tegra_dsi_syncpt(struct tegra_dc_dsi_data *dsi) { u32 val; @@ -1455,12 +1471,9 @@ static void tegra_dsi_set_dsi_clk(struct tegra_dc *dc, /* Enable DSI clock */ tegra_dc_setup_clk(dc, dsi->dsi_clk); - if (!dsi->clk_ref) { - dsi->clk_ref = true; - clk_enable(dsi->dsi_clk); - clk_enable(dsi->dsi_fixed_clk); - tegra_periph_reset_deassert(dsi->dsi_clk); - } + tegra_dsi_clk_enable(dsi); + tegra_periph_reset_deassert(dsi->dsi_clk); + dsi->current_dsi_clk_khz = clk_get_rate(dsi->dsi_clk) / 1000; dsi->current_bit_clk_ns = 1000*1000 / (dsi->current_dsi_clk_khz * 2); } @@ -2193,6 +2206,9 @@ int tegra_dsi_send_panel_short_cmd(struct tegra_dc *dc, u8 *pdata, u8 data_len) int err = 0, count = 0; struct tegra_dc_dsi_data *dsi = tegra_dc_get_outdata(dc); + if (dc->out->flags & TEGRA_DC_OUT_ONE_SHOT_LP_MODE) + tegra_dc_host_resume(dc); + data_len_orig = data_len; if (pdata != NULL) { while (data_len) { @@ -2610,6 +2626,8 @@ static void tegra_dc_dsi_enable(struct tegra_dc *dc) tegra_dc_io_start(dc); mutex_lock(&dsi->lock); + if (dc->out->flags & TEGRA_DC_OUT_ONE_SHOT_LP_MODE) + tegra_dc_host_resume(dc); /* Stop DC stream before configuring DSI registers * to avoid visible glitches on panel during transition * from bootloader to kernel driver @@ -3072,10 +3090,8 @@ static int tegra_dsi_deep_sleep(struct tegra_dc *dc, 0); /* Disable dsi source clock */ - clk_disable(dsi->dsi_clk); - clk_disable(dsi->dsi_fixed_clk); + tegra_dsi_clk_disable(dsi); - dsi->clk_ref = false; dsi->enabled = false; return 0; @@ -3083,6 +3099,25 @@ fail: return err; } + +int tegra_dsi_host_suspend(struct tegra_dc *dc) +{ + struct tegra_dc_dsi_data *dsi = tegra_dc_get_outdata(dc); + + tegra_dsi_stop_dc_stream(dc, dsi); + + tegra_dsi_clk_disable(dsi); +} + +void tegra_dsi_host_resume(struct tegra_dc *dc) +{ + struct tegra_dc_dsi_data *dsi = tegra_dc_get_outdata(dc); + + tegra_dsi_clk_enable(dsi); + + tegra_dsi_start_dc_stream(dc, dsi); +} + static void tegra_dc_dsi_disable(struct tegra_dc *dc) { int err; |