imx_drm_of_get_extra_timing_flags will be used to
retrive the native-mode and de-active display-timings
node properties in the device tree.
Signed-off-by: Denis Carikli <de...@eukrea.com>
---
ChangeLog v9->v10:
- New patch that was splitted out of
"staging: imx-drm: Use de-active and pixelclk-active
- When a IMXDRM_MODE_FLAG_ flag is set, its opposite
flag is also unset.
---
drivers/staging/imx-drm/imx-drm-core.c | 57 ++++++++++++++++++++++++++++++++
drivers/staging/imx-drm/imx-drm.h | 2 ++
2 files changed, 59 insertions(+)
diff --git a/drivers/staging/imx-drm/imx-drm-core.c
b/drivers/staging/imx-drm/imx-drm-core.c
index 6a71cd9..d877b77 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -24,6 +24,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
+#include <video/of_display_timing.h>
#include "imx-drm.h"
@@ -492,6 +493,62 @@ int imx_drm_encoder_parse_of(struct drm_device *drm,
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
+int imx_drm_of_get_extra_timing_flags(struct drm_connector *connector,
+ struct drm_display_mode *mode,
+ struct device_node *display_np)
+{
+ struct drm_display_mode *new_mode = drm_mode_create(connector->dev);
+ struct device_node *timings_np;
+ struct device_node *mode_np;
+ u32 val;
+
+ if (!new_mode)
+ return -EINVAL;
+
+ of_get_drm_display_mode(display_np, mode, OF_USE_NATIVE_MODE);
+
+ timings_np = of_get_child_by_name(display_np, "display-timings");
+ if (timings_np) {
+ /* get the display mode node */
+ mode_np = of_parse_phandle(timings_np,
+ "native-mode", 0);
+ if (!mode_np)
+ mode_np = of_get_next_child(timings_np, NULL);
+
+ if (!of_property_read_u32(mode_np, "de-active", &val)) {
+ if (val) {
+ mode->private_flags |=
+ IMXDRM_MODE_FLAG_DE_HIGH;
+ mode->private_flags &=
+ ~IMXDRM_MODE_FLAG_DE_LOW;
+ } else {
+ mode->private_flags &=
+ ~IMXDRM_MODE_FLAG_DE_HIGH;
+ mode->private_flags |=
+ IMXDRM_MODE_FLAG_DE_LOW;
+ }
+ }
+
+ if (!of_property_read_u32(mode_np, "pixelclk-active",
+ &val)) {
+ if (val) {
+ mode->private_flags |=
+ IMXDRM_MODE_FLAG_PIXDATA_POSEDGE;
+ mode->private_flags &=
+ ~IMXDRM_MODE_FLAG_PIXDATA_NEGEDGE;
+ } else {
+ mode->private_flags &=
+ ~IMXDRM_MODE_FLAG_PIXDATA_POSEDGE;
+ mode->private_flags |=
+ IMXDRM_MODE_FLAG_PIXDATA_NEGEDGE;
+ }
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(imx_drm_of_get_extra_timing_flags);
+
void imx_drm_set_default_timing_flags(struct drm_display_mode *mode)
{
mode->private_flags &= ~IMXDRM_MODE_FLAG_DE_LOW;
diff --git a/drivers/staging/imx-drm/imx-drm.h
b/drivers/staging/imx-drm/imx-drm.h
index ae07d9d..ae01f4d 100644
--- a/drivers/staging/imx-drm/imx-drm.h
+++ b/drivers/staging/imx-drm/imx-drm.h
@@ -54,6 +54,8 @@ int imx_drm_encoder_get_mux_id(struct device_node *node,
struct drm_encoder *encoder);
int imx_drm_encoder_parse_of(struct drm_device *drm,
struct drm_encoder *encoder, struct device_node *np);
+int imx_drm_of_get_extra_timing_flags(struct drm_connector *connector,
+ struct drm_display_mode *mode, struct device_node *display_np);
void imx_drm_set_default_timing_flags(struct drm_display_mode *mode);
int imx_drm_connector_mode_valid(struct drm_connector *connector,
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
