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msm: mdss: dsi: fix dsi init sequence with ulps during suspend feature

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If continuous splash screen feature is disabled and ULPS during suspend
feature is enabled, DSI phy initialization does when device is booting
up, due to incorrect checks in the current implementation. Fix this issue
by ensuring that DSI phy initialization is always done when DSI interface
is turned on.

Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Change-Id: Icdc90eef8d5f3380b47f67268249eb670f8ca824
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
This commit is contained in:
Aravind Venkateswaran 2015-01-29 14:39:27 -08:00 • committed by David Keitel
parent 01058a89df
commit fec6f15fb8
1 changed files with 9 additions and 1 deletions
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10
drivers/video/fbdev/msm/mdss_dsi.c
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@ -1276,7 +1276,15 @@ int mdss_dsi_on(struct mdss_panel_data *pdata)
*/
mdss_dsi_clk_ctrl(ctrl_pdata, ctrl_pdata->dsi_clk_handle,
MDSS_DSI_CORE_CLK, MDSS_DSI_CLK_ON);
if (!pdata->panel_info.ulps_suspend_enabled) {
/*
* If ULPS during suspend feature is enabled, then DSI PHY was
* left on during suspend. In this case, we do not need to reset/init
* PHY. This would have already been done when the CORE clocks are
* turned on. However, if cont splash is disabled, the first time DSI
* is powered on, phy init needs to be done unconditionally.
*/
if (!pdata->panel_info.ulps_suspend_enabled || !ctrl_pdata->ulps) {
mdss_dsi_phy_sw_reset(ctrl_pdata);
mdss_dsi_phy_init(ctrl_pdata);
mdss_dsi_ctrl_setup(ctrl_pdata);