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From: =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= <LW@KARO-electronics.de>
To: David Airlie <airlied@linux.ie>,
        Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
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        =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= 
	<u.kleine-koenig@pengutronix.de>
Cc: =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= <LW@KARO-electronics.de>
Subject: [PATCH 2/3] drm/imx: convey the pixelclk-active and de-active flags from DT to the ipu-di driver
Date: Fri, 20 May 2016 15:34:53 +0200
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Currently these flags are lost in the call
drm_display_mode_from_videomode()

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
---
 drivers/gpu/drm/imx/imx-drm-core.c     | 12 +++++++----
 drivers/gpu/drm/imx/imx-drm.h          |  7 ++++---
 drivers/gpu/drm/imx/imx-ldb.c          | 37 ++++++++++++++++++++++++++--------
 drivers/gpu/drm/imx/ipuv3-crtc.c       |  7 ++++---
 drivers/gpu/drm/imx/parallel-display.c | 31 ++++++++++++++++++++++++----
 drivers/gpu/ipu-v3/ipu-di.c            | 14 +++++++------
 include/video/imx-ipu-v3.h             |  5 +----
 7 files changed, 81 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 2453fb1..51735b1 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -96,7 +96,8 @@ static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
 	return NULL;
 }
 
-int imx_drm_set_bus_format_pins(struct drm_encoder *encoder, u32 bus_format,
+int imx_drm_set_bus_format_pins(struct drm_encoder *encoder,
+		u32 bus_format, u32 bus_flags,
 		int hsync_pin, int vsync_pin)
 {
 	struct imx_drm_crtc_helper_funcs *helper;
@@ -109,14 +110,17 @@ int imx_drm_set_bus_format_pins(struct drm_encoder *encoder, u32 bus_format,
 	helper = &imx_crtc->imx_drm_helper_funcs;
 	if (helper->set_interface_pix_fmt)
 		return helper->set_interface_pix_fmt(encoder->crtc,
-					bus_format, hsync_pin, vsync_pin);
+					bus_format, bus_flags,
+					hsync_pin, vsync_pin);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(imx_drm_set_bus_format_pins);
 
-int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
+int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format,
+		u32 bus_flags)
 {
-	return imx_drm_set_bus_format_pins(encoder, bus_format, 2, 3);
+	return imx_drm_set_bus_format_pins(encoder, bus_format, bus_flags,
+					2, 3);
 }
 EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);
 
diff --git a/drivers/gpu/drm/imx/imx-drm.h b/drivers/gpu/drm/imx/imx-drm.h
index b0241b9..b74baf7 100644
--- a/drivers/gpu/drm/imx/imx-drm.h
+++ b/drivers/gpu/drm/imx/imx-drm.h
@@ -19,7 +19,8 @@ struct imx_drm_crtc_helper_funcs {
 	int (*enable_vblank)(struct drm_crtc *crtc);
 	void (*disable_vblank)(struct drm_crtc *crtc);
 	int (*set_interface_pix_fmt)(struct drm_crtc *crtc,
-			u32 bus_format, int hsync_pin, int vsync_pin);
+			u32 bus_format, u32 bus_flags,
+			int hsync_pin, int vsync_pin);
 	const struct drm_crtc_helper_funcs *crtc_helper_funcs;
 	const struct drm_crtc_funcs *crtc_funcs;
 };
@@ -42,9 +43,9 @@ void imx_drm_mode_config_init(struct drm_device *drm);
 struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
 
 int imx_drm_set_bus_format_pins(struct drm_encoder *encoder,
-		u32 bus_format, int hsync_pin, int vsync_pin);
+		u32 bus_format, u32 bus_flags, int hsync_pin, int vsync_pin);
 int imx_drm_set_bus_format(struct drm_encoder *encoder,
-		u32 bus_format);
+		u32 bus_format, u32 bus_flags);
 
 int imx_drm_encoder_parse_of(struct drm_device *drm,
 	struct drm_encoder *encoder, struct device_node *np);
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index b2dc4df..67706eea 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -27,6 +27,7 @@
 #include <linux/of_graph.h>
 #include <video/of_display_timing.h>
 #include <video/of_videomode.h>
+#include <video/videomode.h>
 #include <linux/regmap.h>
 #include <linux/videodev2.h>
 
@@ -65,7 +66,8 @@ struct imx_ldb_channel {
 	int edid_len;
 	struct drm_display_mode mode;
 	int mode_valid;
-	int bus_format;
+	u32 bus_format;
+	u32 bus_flags;
 };
 
 struct bus_mux {
@@ -102,8 +104,10 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector)
 		struct drm_display_info *di = &connector->display_info;
 
 		num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
-		if (!imx_ldb_ch->bus_format && di->num_bus_formats)
+		if (!imx_ldb_ch->bus_format && di->num_bus_formats) {
 			imx_ldb_ch->bus_format = di->bus_formats[0];
+			imx_ldb_ch->bus_flags = di->bus_flags;
+		}
 		if (num_modes > 0)
 			return num_modes;
 	}
@@ -202,7 +206,8 @@ static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
 		break;
 	}
 
-	imx_drm_set_bus_format(encoder, bus_format);
+	imx_drm_set_bus_format(encoder, bus_format,
+			imx_ldb_ch->bus_flags);
 }
 
 static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
@@ -558,7 +563,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
 
 		ret = of_property_read_u32(child, "reg", &i);
 		if (ret || i < 0 || i > 1)
-			return -EINVAL;
+			return ret ?: -EINVAL;
 
 		if (dual && i > 0) {
 			dev_warn(dev, "dual-channel mode, ignoring second output\n");
@@ -601,10 +606,26 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
 			channel->edid = kmemdup(edidp, channel->edid_len,
 						GFP_KERNEL);
 		} else if (!channel->panel) {
-			ret = of_get_drm_display_mode(child, &channel->mode,
-						OF_USE_NATIVE_MODE);
-			if (!ret)
-				channel->mode_valid = 1;
+			struct videomode vm;
+
+			ret = of_get_videomode(child, &vm, OF_USE_NATIVE_MODE);
+			if (ret)
+				return ret;
+
+			drm_display_mode_from_videomode(&vm, &channel->mode);
+
+			if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+				channel->bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+			if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+				channel->bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+			if (vm.flags & DISPLAY_FLAGS_DE_LOW)
+				channel->bus_flags |= DRM_BUS_FLAG_DE_LOW;
+			if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
+				channel->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+
+			drm_mode_debug_printmodeline(&channel->mode);
+			channel->mode_valid = 1;
 		}
 
 		channel->bus_format = of_get_bus_format(dev, child);
diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index dee8e8b..3fb9ac7 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -66,6 +66,7 @@ struct ipu_crtc {
 	struct ipu_flip_work	*flip_work;
 	int			irq;
 	u32			bus_format;
+	u32			bus_flags;
 	int			di_hsync_pin;
 	int			di_vsync_pin;
 };
@@ -271,9 +272,8 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
 	else
 		sig_cfg.clkflags = 0;
 
-	sig_cfg.enable_pol = 1;
-	sig_cfg.clk_pol = 0;
 	sig_cfg.bus_format = ipu_crtc->bus_format;
+	sig_cfg.bus_flags = ipu_crtc->bus_flags;
 	sig_cfg.v_to_h_sync = 0;
 	sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
 	sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
@@ -396,11 +396,12 @@ static void ipu_disable_vblank(struct drm_crtc *crtc)
 }
 
 static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc,
-		u32 bus_format, int hsync_pin, int vsync_pin)
+		u32 bus_format, u32 bus_flags, int hsync_pin, int vsync_pin)
 {
 	struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 
 	ipu_crtc->bus_format = bus_format;
+	ipu_crtc->bus_flags = bus_flags;
 	ipu_crtc->di_hsync_pin = hsync_pin;
 	ipu_crtc->di_vsync_pin = vsync_pin;
 
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 363e2c7..440f34d 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -19,9 +19,12 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_panel.h>
+#include <linux/of_graph.h>
 #include <linux/videodev2.h>
+#include <video/display_timing.h>
 #include <video/of_display_timing.h>
-#include <linux/of_graph.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
 
 #include "imx-drm.h"
 
@@ -35,6 +38,7 @@ struct imx_parallel_display {
 	void *edid;
 	int edid_len;
 	u32 bus_format;
+	u32 bus_flags;
 	int mode_valid;
 	struct drm_display_mode mode;
 	struct drm_panel *panel;
@@ -57,8 +61,10 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 		struct drm_display_info *di = &connector->display_info;
 
 		num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
-		if (!imxpd->bus_format && di->num_bus_formats)
+		if (!imxpd->bus_format && di->num_bus_formats) {
 			imxpd->bus_format = di->bus_formats[0];
+			imxpd->bus_flags = di->bus_flags;
+		}
 		if (num_modes > 0)
 			return num_modes;
 	}
@@ -81,10 +87,27 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 
 	if (np) {
 		struct drm_display_mode *mode = drm_mode_create(connector->dev);
+		struct videomode vm;
+		int ret;
 
 		if (!mode)
 			return -EINVAL;
-		of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
+
+		ret = of_get_videomode(np, &vm, OF_USE_NATIVE_MODE);
+		if (ret)
+			return ret;
+		drm_display_mode_from_videomode(&vm, &imxpd->mode);
+		drm_mode_debug_printmodeline(&imxpd->mode);
+
+		if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+			imxpd->bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+		if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+			imxpd->bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+		if (vm.flags & DISPLAY_FLAGS_DE_LOW)
+			imxpd->bus_flags |= DRM_BUS_FLAG_DE_LOW;
+		if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
+			imxpd->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
 		drm_mode_copy(mode, &imxpd->mode);
 		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 		drm_mode_probed_add(connector, mode);
@@ -116,7 +139,7 @@ static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
 
-	imx_drm_set_bus_format(encoder, imxpd->bus_format);
+	imx_drm_set_bus_format(encoder, imxpd->bus_format, imxpd->bus_flags);
 }
 
 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index 359268e..bff4701 100644
--- a/drivers/gpu/ipu-v3/ipu-di.c
+++ b/drivers/gpu/ipu-v3/ipu-di.c
@@ -20,6 +20,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 
+#include <drm/drm_crtc.h>
 #include <video/imx-ipu-v3.h>
 #include "ipu-prv.h"
 
@@ -622,7 +623,9 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
 	if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
 		di_gen |= ipu_di_gen_polarity(sig->vsync_pin);
 
-	if (sig->clk_pol)
+	if (sig->bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
+		di_gen &= ~DI_GEN_POLARITY_DISP_CLK;
+	else if (sig->bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE)
 		di_gen |= DI_GEN_POLARITY_DISP_CLK;
 
 	ipu_di_write(di, di_gen, DI_GENERAL);
@@ -630,13 +633,12 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
 	ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
 		     DI_SYNC_AS_GEN);
 
-	reg = ipu_di_read(di, DI_POL);
-	reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
+	reg = ipu_di_read(di, DI_POL) & ~DI_POL_DRDY_DATA_POLARITY;
 
-	if (sig->enable_pol)
+	if (sig->bus_flags & DRM_BUS_FLAG_DE_HIGH)
 		reg |= DI_POL_DRDY_POLARITY_15;
-	if (sig->data_pol)
-		reg |= DI_POL_DRDY_DATA_POLARITY;
+	else if (sig->bus_flags & DRM_BUS_FLAG_DE_LOW)
+		reg &= ~DI_POL_DRDY_POLARITY_15;
 
 	ipu_di_write(di, reg, DI_POL);
 
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index ad66589..7c64c55 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -33,13 +33,10 @@ enum ipuv3_type {
  * Bitfield of Display Interface signal polarities.
  */
 struct ipu_di_signal_cfg {
-	unsigned data_pol:1;	/* true = inverted */
-	unsigned clk_pol:1;	/* true = rising edge */
-	unsigned enable_pol:1;
-
 	struct videomode mode;
 
 	u32 bus_format;
+	u32 bus_flags;
 	u32 v_to_h_sync;
 
 #define IPU_DI_CLKMODE_SYNC	(1 << 0)
-- 
2.1.4