recipes-kernel/linux/linux-omap-2.6.39/sakoman/0004-OMAP-DSS-DSI-Fix-DSI-PLL-power-bug.patch

   1 From e7665ffb72cbc890b8494c687b335e3e242231d9 Mon Sep 17 00:00:00 2001
   2 From: Tomi Valkeinen <tomi.valkeinen@ti.com>
   3 Date: Fri, 15 Apr 2011 10:42:59 +0300
   4 Subject: [PATCH 04/31] OMAP: DSS: DSI: Fix DSI PLL power bug
   5
   6 OMAP3630 has a HW bug causing DSI PLL power command POWER_ON_DIV (0x3)
   7 to not work properly. The bug prevents us from enabling DSI PLL power
   8 only to HS divider block.
   9
  10 This patch adds a dss feature for the bug and converts POWER_ON_DIV
  11 requests to POWER_ON_ALL (0x2).
  12
  13 Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
  14 ---
  15  drivers/video/omap2/dss/dsi.c          |    5 +++++
  16  drivers/video/omap2/dss/dss_features.c |    2 +-
  17  drivers/video/omap2/dss/dss_features.h |    2 ++
  18  3 files changed, 8 insertions(+), 1 deletions(-)
  19
  20 diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
  21 index 1464ac4..cbd9ca4 100644
  22 --- a/drivers/video/omap2/dss/dsi.c
  23 +++ b/drivers/video/omap2/dss/dsi.c
  24 @@ -1059,6 +1059,11 @@ static int dsi_pll_power(enum dsi_pll_power_state state)
  25  {
  26         int t = 0;
  27
  28 +       /* DSI-PLL power command 0x3 is not working */
  29 +       if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
  30 +                       state == DSI_PLL_POWER_ON_DIV)
  31 +               state = DSI_PLL_POWER_ON_ALL;
  32 +
  33         REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30);       /* PLL_PWR_CMD */
  34
  35         /* PLL_PWR_STATUS */
  36 diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
  37 index aa16222..8c50e18 100644
  38 --- a/drivers/video/omap2/dss/dss_features.c
  39 +++ b/drivers/video/omap2/dss/dss_features.c
  40 @@ -271,7 +271,7 @@ static struct omap_dss_features omap3630_dss_features = {
  41                 FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
  42                 FEAT_PRE_MULT_ALPHA | FEAT_FUNCGATED |
  43                 FEAT_ROWREPEATENABLE | FEAT_LINEBUFFERSPLIT |
  44 -               FEAT_RESIZECONF,
  45 +               FEAT_RESIZECONF | FEAT_DSI_PLL_PWR_BUG,
  46
  47         .num_mgrs = 2,
  48         .num_ovls = 3,
  49 diff --git a/drivers/video/omap2/dss/dss_features.h b/drivers/video/omap2/dss/dss_features.h
  50 index 12e9c4e..37922ce 100644
  51 --- a/drivers/video/omap2/dss/dss_features.h
  52 +++ b/drivers/video/omap2/dss/dss_features.h
  53 @@ -40,6 +40,8 @@ enum dss_feat_id {
  54         /* Independent core clk divider */
  55         FEAT_CORE_CLK_DIV       = 1 << 11,
  56         FEAT_LCD_CLK_SRC        = 1 << 12,
  57 +       /* DSI-PLL power command 0x3 is not working */
  58 +       FEAT_DSI_PLL_PWR_BUG    = 1 << 13,
  59  };
  60
  61  /* DSS register field id */
  62 --
  63 1.6.6.1
  64