ENGR00178456 IPUv3 fb:Unblank primary fb only by default

This patch changes IPUv3 fb probe function logic to
unblank the primary fb only by default so that the
secondary fb using IPU DP BG channel won't be unblanked
when system boot-ups. This avoids the HDMI fb(as the
secondary fb using IPU DP BG channel) is unblanked
accidentally without plugging in HDMI cable.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
(cherry picked from commit 2c8188de61f84e40e26e662138af5ef4f81a0969)

diff --git a/drivers/video/mxc/mxc_ipuv3_fb.c b/drivers/video/mxc/mxc_ipuv3_fb.c
index 62685a5197e7d4a3da1fd45e1aebd3f2bec32eae..8eade2c99d1ad57f601bd8b6d5abc333dc015561 100644 (file)
--- a/drivers/video/mxc/mxc_ipuv3_fb.c
+++ b/drivers/video/mxc/mxc_ipuv3_fb.c
@@ -2077,7 +2077,11 @@ static int mxcfb_probe(struct platform_device *pdev)
                mxcfbi->ipu_ch_nf_irq = IPU_IRQ_BG_SYNC_NFACK;
                mxcfbi->ipu_alp_ch_irq = IPU_IRQ_BG_ALPHA_SYNC_EOF;
                mxcfbi->ipu_ch = MEM_BG_SYNC;
-               mxcfbi->cur_blank = mxcfbi->next_blank = FB_BLANK_UNBLANK;
+               /* Unblank the primary fb only by default */
+               if (pdev->id == 0)
+                       mxcfbi->cur_blank = mxcfbi->next_blank = FB_BLANK_UNBLANK;
+               else
+                       mxcfbi->cur_blank = mxcfbi->next_blank = FB_BLANK_POWERDOWN;
 
                ipu_disp_set_global_alpha(mxcfbi->ipu, mxcfbi->ipu_ch, true, 0x80);
                ipu_disp_set_color_key(mxcfbi->ipu, mxcfbi->ipu_ch, false, 0);