Commit 49303142 authored by Robert Chiras's avatar Robert Chiras Committed by Guido Gunther

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: default avatarRobert Chiras <robert.chiras@nxp.com>
parent 2c7066fc
......@@ -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
......
......@@ -108,6 +108,8 @@
#define CTRL2_LINE_PATTERN_BGR 5
#define CTRL2_LINE_PATTERN_CLR 7
#define CTRL2_LCD_RESET BIT(0)
#define TRANSFER_COUNT_SET_VCOUNT(x) REG_PUT((x), 31, 16)
#define TRANSFER_COUNT_GET_VCOUNT(x) REG_GET((x), 31, 16)
#define TRANSFER_COUNT_SET_HCOUNT(x) REG_PUT((x), 15, 0)
......
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