From: Jerry Alexander <jerryalex@tx.rr.com>
To: linux-omap@vger.kernel.org
Subject: DSI lane configuration
Date: Tue, 12 Jul 2011 08:20:28 -0700 [thread overview]
Message-ID: <4E1C663C.5040201@tx.rr.com> (raw)
Have a new board with the omap4 and toshiba bridge chipset.
The board has two lanes instead of four.
Removed DSI_COMPLEXIO_CFG1 entries for data3_lane, data3_pol,
data4_lane, and data4_pol.
With 4 lanes configured we see traffic on the scope ,but the toshiba
drops it since the board has only two lanes.
With 2 lanes configured we see no traffic.
Cannot other fields in the omap required to reconfigure for 2 lanes.
It is also possible that the omap_dss_device divisors in the board
file are causing the problem. If this is the case, there is insufficient
data in the TRM on how to reset for different lane config and different
clocking.
Note, our LVDS is different and requires 82MHZ and not 66MHZ as
with the Blazetablet.
Jerry
.lck_div = 1, /* LCD */
.pck_div = 2, /* PCD */
.regm = 394, /* DSI_PLL_REGM */
.regn = 38, /* DSI_PLL_REGN */
.regm_dispc = 6, /* PLL_CLK1 (M4) */
.regm_dsi = 9, /* PLL_CLK2 (M5) */
.lp_clk_div = 5, /* LPDIV */
reply other threads:[~2011-07-12 15:20 UTC|newest]
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