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 --- drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 14 ++++++++++---- drivers/gpu/drm/mxsfb/mxsfb_regs.h | 2 ++ 2 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c index 1be29f5..a4ba368 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 diff --git a/drivers/gpu/drm/mxsfb/mxsfb_regs.h b/drivers/gpu/drm/mxsfb/mxsfb_regs.h index dc4daa0..0f63ba1 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_regs.h +++ b/drivers/gpu/drm/mxsfb/mxsfb_regs.h @@ -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)