diff options
| author | Robert Chiras <robert.chiras@nxp.com> | 2019-01-15 13:14:07 +0200 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 15:59:02 +0800 |
| commit | cfe859734171191bc80d2cdd16c1f88a9a8c0e23 (patch) | |
| tree | 51a7ea04a567b63f432656c7c95d725f728e61f4 /drivers/gpu/drm/mxsfb/mxsfb_crtc.c | |
| parent | 1d0b3c97e59be23b2ef1c674e4e682161602b390 (diff) | |
drm/mxsfb: Update mxsfb to support LCD reset
The eLCDIF controller has control pin for the external LCD reset pin.
Add support for it and assert this pin in enable and de-assert it in
disable.
Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Tested-by: Guido Günther <agx@sigxcpu.org>
Diffstat (limited to 'drivers/gpu/drm/mxsfb/mxsfb_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c index 1be29f584d2e..a4ba368ca565 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c @@ -224,9 +224,12 @@ static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb) clk_prepare_enable(mxsfb->clk_disp_axi); clk_prepare_enable(mxsfb->clk); - if (mxsfb->devdata->ipversion >= 4) + if (mxsfb->devdata->ipversion >= 4) { writel(CTRL2_OUTSTANDING_REQS(REQ_16), mxsfb->base + LCDC_V4_CTRL2 + REG_SET); + /* Assert LCD Reset bit */ + writel(CTRL2_LCD_RESET, mxsfb->base + LCDC_V4_CTRL2 + REG_SET); + } /* If it was disabled, re-enable the mode again */ writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET); @@ -244,11 +247,14 @@ static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb) { u32 reg; - if (mxsfb->devdata->ipversion >= 4) + writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_CLR); + + if (mxsfb->devdata->ipversion >= 4) { writel(CTRL2_OUTSTANDING_REQS(0x7), mxsfb->base + LCDC_V4_CTRL2 + REG_CLR); - - writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_CLR); + /* De-assert LCD Reset bit */ + writel(CTRL2_LCD_RESET, mxsfb->base + LCDC_V4_CTRL2 + REG_CLR); + } /* * Even if we disable the controller here, it will still continue |