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Date: Wed, 25 May 2016 15:18:16 +0200
From: Lothar Waßmann <LW@...O-electronics.de>
To: David Airlie <airlied@...ux.ie>,
Philipp Zabel <p.zabel@...gutronix.de>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc: Lothar Waßmann <LW@...O-electronics.de>
Subject: [PATCHv3 1/1] drm/imx: convey the pixelclk-active and de-active flags from DT to the ipu-di driver
The 'de-active' and 'pixelclk-active' DT properties are evaluated
by of_parse_display_timing() called from of_get_drm_display_mode(),
but later lost in the conversion from videomode.flags to
drm_display_mode.flags.
Use an open coded version of of_get_drm_display_mode() to get access
to these flags and make sure they are passed on to the ipu-di driver.
Changes vs. v2:
- removed patches which have already been applied
- created a drm_bus_flags_from_videomode() helper to prevent code
duplication as suggested by Philipp Zabel
Changes vs. v1:
- rebased on top of https://patchwork.kernel.org/patch/9113791/ as
per Philipp Zabel's request
GIT: [PATCHv2 1/3] drm/imx: imx-ldb: honor 'native-mode' property when
GIT: [PATCHv2 2/3] drm/imx: convey the pixelclk-active and de-active flags
GIT: [PATCHv2 3/3] drm/imx: remove dead code
Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
---
drivers/gpu/drm/drm_modes.c | 20 +++++++++++++++++++-
drivers/gpu/drm/imx/imx-ldb.c | 15 ++++++++++-----
drivers/gpu/drm/imx/parallel-display.c | 16 +++++++++++++---
include/drm/drm_modes.h | 5 +++--
4 files changed, 45 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 7def3d5..7c97d5b 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -655,6 +655,21 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
}
EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
+void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
+{
+ *bus_flags = 0;
+ if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+ *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+ if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+ if (vm->flags & DISPLAY_FLAGS_DE_LOW)
+ *bus_flags |= DRM_BUS_FLAG_DE_LOW;
+ if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
+ *bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+}
+EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
+
#ifdef CONFIG_OF
/**
* of_get_drm_display_mode - get a drm_display_mode from devicetree
@@ -670,7 +685,8 @@ EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
* 0 on success, a negative errno code when no of videomode node was found.
*/
int of_get_drm_display_mode(struct device_node *np,
- struct drm_display_mode *dmode, int index)
+ struct drm_display_mode *dmode, u32 *bus_flags,
+ int index)
{
struct videomode vm;
int ret;
@@ -680,6 +696,8 @@ int of_get_drm_display_mode(struct device_node *np,
return ret;
drm_display_mode_from_videomode(&vm, dmode);
+ if (bus_flags)
+ drm_bus_flags_from_videomode(&vm, bus_flags);
pr_debug("%s: got %dx%d display mode from %s\n",
of_node_full_name(np), vm.hactive, vm.vactive, np->name);
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index b2dc4df..bb9d745 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -65,7 +65,8 @@ 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 +103,10 @@ 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 +205,8 @@ static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
break;
}
- imx_drm_set_bus_format(encoder, bus_format);
+ imx_drm_set_bus_config(encoder, bus_format, 2, 3,
+ imx_ldb_ch->bus_flags);
}
static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
@@ -558,7 +562,7 @@ 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");
@@ -602,7 +606,8 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
GFP_KERNEL);
} else if (!channel->panel) {
ret = of_get_drm_display_mode(child, &channel->mode,
- OF_USE_NATIVE_MODE);
+ &channel->bus_flags,
+ OF_USE_NATIVE_MODE);
if (!ret)
channel->mode_valid = 1;
}
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 2a81079..002d4d5 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -35,6 +35,7 @@ struct imx_parallel_display {
void *edid;
int edid_len;
u32 bus_format;
+ u32 bus_flags;
struct drm_display_mode mode;
struct drm_panel *panel;
};
@@ -56,8 +57,10 @@ 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;
}
@@ -69,10 +72,17 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
if (np) {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
+ int ret;
if (!mode)
return -EINVAL;
- of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
+
+ ret = of_get_drm_display_mode(np, &imxpd->mode,
+ &imxpd->bus_flags,
+ OF_USE_NATIVE_MODE);
+ if (ret)
+ return ret;
+
drm_mode_copy(mode, &imxpd->mode);
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
drm_mode_probed_add(connector, mode);
@@ -104,7 +114,7 @@ static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
{
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
imx_drm_set_bus_config(encoder, imxpd->bus_format, 2, 3,
- imxpd->connector.display_info.bus_flags);
+ imxpd->bus_flags);
}
static void imx_pd_encoder_commit(struct drm_encoder *encoder)
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index 625966a..a243533 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -432,7 +432,7 @@ struct drm_cmdline_mode;
struct drm_display_mode *drm_mode_create(struct drm_device *dev);
void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
- const struct drm_display_mode *in);
+ const struct drm_display_mode *in);
int drm_mode_convert_umode(struct drm_display_mode *out,
const struct drm_mode_modeinfo *in);
void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
@@ -455,8 +455,9 @@ void drm_display_mode_from_videomode(const struct videomode *vm,
struct drm_display_mode *dmode);
void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
struct videomode *vm);
+void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
int of_get_drm_display_mode(struct device_node *np,
- struct drm_display_mode *dmode,
+ struct drm_display_mode *dmode, u32 *bus_flags,
int index);
void drm_mode_set_name(struct drm_display_mode *mode);
--
2.1.4
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