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| author | Liu Ying <Ying.Liu@freescale.com> | 2012-08-22 11:11:19 +0800 |
|---|---|---|
| committer | Liu Ying <Ying.Liu@freescale.com> | 2012-08-28 10:13:01 +0800 |
| commit | 5258372493d5e3b0f405524d4711bcf6f63aff79 (patch) | |
| tree | 16241b9710367f945f7e5bcb75b82eab70a89e96 /board/freescale | |
| parent | d5f739dc39bee8229c0ca253f9a1182d433dfc45 (diff) | |
| download | u-boot-imx-5258372493d5e3b0f405524d4711bcf6f63aff79.zip u-boot-imx-5258372493d5e3b0f405524d4711bcf6f63aff79.tar.gz u-boot-imx-5258372493d5e3b0f405524d4711bcf6f63aff79.tar.bz2 | |
ENGR00221013 MX6 SabreSD:Disable LVDS panel CABC function
This patch sets CABC_EN0/1 pins to low to disable
LVDS panel CABC function. This function will turn backlight
automatically according to display content which may cause
potential unstable backlight phenomena.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/mx6q_sabresd/mx6q_sabresd.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/board/freescale/mx6q_sabresd/mx6q_sabresd.c b/board/freescale/mx6q_sabresd/mx6q_sabresd.c index c611dcb..3989b23 100644 --- a/board/freescale/mx6q_sabresd/mx6q_sabresd.c +++ b/board/freescale/mx6q_sabresd/mx6q_sabresd.c @@ -1374,11 +1374,22 @@ void lcd_enable(void) g_ipu_hw_rev = IPUV3_HW_REV_IPUV3H; #if defined CONFIG_MX6Q + /* GPIO backlight */ mxc_iomux_v3_setup_pad(MX6Q_PAD_SD1_DAT3__GPIO_1_21); + /* LVDS panel CABC_EN0 */ + mxc_iomux_v3_setup_pad(MX6Q_PAD_NANDF_CS2__GPIO_6_15); + /* LVDS panel CABC_EN1 */ + mxc_iomux_v3_setup_pad(MX6Q_PAD_NANDF_CS3__GPIO_6_16); #elif defined CONFIG_MX6DL + /* GPIO backlight */ mxc_iomux_v3_setup_pad(MX6DL_PAD_SD1_DAT3__GPIO_1_21); + /* LVDS panel CABC_EN0 */ + mxc_iomux_v3_setup_pad(MX6DL_PAD_NANDF_CS2__GPIO_6_15); + /* LVDS panel CABC_EN1 */ + mxc_iomux_v3_setup_pad(MX6DL_PAD_NANDF_CS3__GPIO_6_16); #endif + /* Set GPIO backlight to high. */ reg = readl(GPIO1_BASE_ADDR + GPIO_GDIR); reg |= (1 << 21); writel(reg, GPIO1_BASE_ADDR + GPIO_GDIR); @@ -1387,6 +1398,33 @@ void lcd_enable(void) reg |= (1 << 21); writel(reg, GPIO1_BASE_ADDR + GPIO_DR); + /* + * Set LVDS panel CABC_EN0 to low to disable + * CABC function. This function will turn backlight + * automatically according to display content, so + * simply disable it to get rid of annoying unstable + * backlight phenomena. + */ + reg = readl(GPIO6_BASE_ADDR + GPIO_GDIR); + reg |= (1 << 15); + writel(reg, GPIO6_BASE_ADDR + GPIO_GDIR); + + reg = readl(GPIO6_BASE_ADDR + GPIO_DR); + reg &= ~(1 << 15); + writel(reg, GPIO6_BASE_ADDR + GPIO_DR); + + /* + * Set LVDS panel CABC_EN1 to low to disable + * CABC function. + */ + reg = readl(GPIO6_BASE_ADDR + GPIO_GDIR); + reg |= (1 << 16); + writel(reg, GPIO6_BASE_ADDR + GPIO_GDIR); + + reg = readl(GPIO6_BASE_ADDR + GPIO_DR); + reg &= ~(1 << 16); + writel(reg, GPIO6_BASE_ADDR + GPIO_DR); + /* Enable IPU clock */ if (di == 1) { reg = readl(CCM_BASE_ADDR + CLKCTL_CCGR3); |