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| author | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-06-09 15:28:12 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-08-05 16:51:49 +0300 |
| commit | e406f9079b993f4d5d7b5a3452b11df81ff2aef0 (patch) | |
| tree | e536deba2793813a214d83b222347fa469dffd71 /drivers/video/omap2/dss/dss.c | |
| parent | ebf0a3fef2240983fbc994f15d8c3d8a20102480 (diff) | |
| download | lwn-e406f9079b993f4d5d7b5a3452b11df81ff2aef0.tar.gz lwn-e406f9079b993f4d5d7b5a3452b11df81ff2aef0.zip | |
OMAP: DSS2: DSI: Wait for DSI PLL clocks to be active before selecting them
The TRM tells us to wait for the DSI PLL derived clocks to become
active before selecting them for use. I didn't actually have any issues
which this would fix but according to the TRM it seems to be the right
thing to do.
Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Diffstat (limited to 'drivers/video/omap2/dss/dss.c')
| -rw-r--r-- | drivers/video/omap2/dss/dss.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 24b18258654f..77c3621c9171 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -265,6 +265,9 @@ void dss_select_dispc_clk_source(enum dss_clk_source clk_src) b = clk_src == DSS_SRC_DSS1_ALWON_FCLK ? 0 : 1; + if (clk_src == DSS_SRC_DSI1_PLL_FCLK) + dsi_wait_dsi1_pll_active(); + REG_FLD_MOD(DSS_CONTROL, b, 0, 0); /* DISPC_CLK_SWITCH */ dss.dispc_clk_source = clk_src; @@ -279,6 +282,9 @@ void dss_select_dsi_clk_source(enum dss_clk_source clk_src) b = clk_src == DSS_SRC_DSS1_ALWON_FCLK ? 0 : 1; + if (clk_src == DSS_SRC_DSI2_PLL_FCLK) + dsi_wait_dsi2_pll_active(); + REG_FLD_MOD(DSS_CONTROL, b, 1, 1); /* DSI_CLK_SWITCH */ dss.dsi_clk_source = clk_src; |