drm/imx: fix DP CSC handling
- Fix the DP color space conversion matrix setup to avoid bugs where disabling the overlay plane while both primary and overlay plane are routed via the CSC unit would not reconfigure the CSC routing properly, leaving the display in a nonworking state, or the CSC setting from a previously set mode would be left behind, causing wrong colors when reenabling the display in certain configurations. -----BEGIN PGP SIGNATURE----- iI0EABYIADUWIQRRO6F6WdpH1R0vGibVhaclGDdiwAUCXMF1RRcccC56YWJlbEBw ZW5ndXRyb25peC5kZQAKCRDVhaclGDdiwLv0AQDGnqD259vga1dQqef4qOzOOCVn ttvc6+2C4dMQGmJf5QEA9HMkVHmC9DyUYtFnI9WS2x7BZKNtLLNK0O7wvWQ+Kw0= =v8Rr -----END PGP SIGNATURE----- Merge tag 'imx-drm-fixes-2019-04-25' of git://git.pengutronix.de/pza/linux into drm-fixes drm/imx: fix DP CSC handling - Fix the DP color space conversion matrix setup to avoid bugs where disabling the overlay plane while both primary and overlay plane are routed via the CSC unit would not reconfigure the CSC routing properly, leaving the display in a nonworking state, or the CSC setting from a previously set mode would be left behind, causing wrong colors when reenabling the display in certain configurations. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Philipp Zabel <p.zabel@pengutronix.de> Link: https://patchwork.freedesktop.org/patch/msgid/1556183136.2271.3.camel@pengutronix.de
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6db71bea59
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@ -71,7 +71,7 @@ static void ipu_crtc_disable_planes(struct ipu_crtc *ipu_crtc,
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if (disable_partial)
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ipu_plane_disable(ipu_crtc->plane[1], true);
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if (disable_full)
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ipu_plane_disable(ipu_crtc->plane[0], false);
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ipu_plane_disable(ipu_crtc->plane[0], true);
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}
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static void ipu_crtc_atomic_disable(struct drm_crtc *crtc,
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@ -195,7 +195,8 @@ int ipu_dp_setup_channel(struct ipu_dp *dp,
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ipu_dp_csc_init(flow, flow->foreground.in_cs, flow->out_cs,
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DP_COM_CONF_CSC_DEF_BOTH);
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} else {
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if (flow->foreground.in_cs == flow->out_cs)
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if (flow->foreground.in_cs == IPUV3_COLORSPACE_UNKNOWN ||
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flow->foreground.in_cs == flow->out_cs)
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/*
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* foreground identical to output, apply color
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* conversion on background
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@ -261,6 +262,8 @@ void ipu_dp_disable_channel(struct ipu_dp *dp, bool sync)
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struct ipu_dp_priv *priv = flow->priv;
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u32 reg, csc;
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dp->in_cs = IPUV3_COLORSPACE_UNKNOWN;
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if (!dp->foreground)
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return;
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@ -268,8 +271,9 @@ void ipu_dp_disable_channel(struct ipu_dp *dp, bool sync)
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reg = readl(flow->base + DP_COM_CONF);
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csc = reg & DP_COM_CONF_CSC_DEF_MASK;
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if (csc == DP_COM_CONF_CSC_DEF_FG)
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reg &= ~DP_COM_CONF_CSC_DEF_MASK;
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reg &= ~DP_COM_CONF_CSC_DEF_MASK;
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if (csc == DP_COM_CONF_CSC_DEF_BOTH || csc == DP_COM_CONF_CSC_DEF_BG)
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reg |= DP_COM_CONF_CSC_DEF_BG;
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reg &= ~DP_COM_CONF_FG_EN;
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writel(reg, flow->base + DP_COM_CONF);
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@ -347,6 +351,8 @@ int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
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mutex_init(&priv->mutex);
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for (i = 0; i < IPUV3_NUM_FLOWS; i++) {
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priv->flow[i].background.in_cs = IPUV3_COLORSPACE_UNKNOWN;
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priv->flow[i].foreground.in_cs = IPUV3_COLORSPACE_UNKNOWN;
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priv->flow[i].foreground.foreground = true;
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priv->flow[i].base = priv->base + ipu_dp_flow_base[i];
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priv->flow[i].priv = priv;
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