If de-active and/or pixelclk-active properties were set in the
display-timings DT node, they were not used.
Instead the data-enable and the pixel data clock polarity
were hardcoded.
This change is needed for making the eukrea-cpuimx51
QVGA display work.
Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: driverdev-devel@xxxxxxxxxxxxxxxxxxxxxx
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx>
Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: David Airlie <airlied@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Eric Bénard <eric@xxxxxxxxxx>
Signed-off-by: Denis Carikli <denis@xxxxxxxxxx>
---
ChangeLog v3->v4:
- The old patch was named "staging: imx-drm: ipuv3-crtc: don't harcode some mode".
- Reworked the patch entierly: we now takes the mode flags from the device tree.
ChangeLog v2->v3:
- Added some interested people in the Cc list.
- Ajusted the flags to match the changes in "drm: Add the lacking
DRM_MODE_FLAG_* for matching the DISPLAY_FLAGS_*"
---
drivers/staging/imx-drm/imx-drm.h | 3 +++
drivers/staging/imx-drm/ipuv3-crtc.c | 11 +++++++++--
drivers/staging/imx-drm/parallel-display.c | 28 ++++++++++++++++++++++++++++
3 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/imx-drm/imx-drm.h b/drivers/staging/imx-drm/imx-drm.h
index ae90c9c..dfdc180 100644
--- a/drivers/staging/imx-drm/imx-drm.h
+++ b/drivers/staging/imx-drm/imx-drm.h
@@ -5,6 +5,9 @@
#define IPU_PIX_FMT_GBR24 v4l2_fourcc('G', 'B', 'R', '3')
+#define IMXDRM_MODE_FLAG_DE_HIGH (1<<0)
+#define IMXDRM_MODE_FLAG_PIXDATA_POSEDGE (1<<1)
+
struct drm_crtc;
struct drm_connector;
struct drm_device;
diff --git a/drivers/staging/imx-drm/ipuv3-crtc.c b/drivers/staging/imx-drm/ipuv3-crtc.c
index 670a56a..82dce06 100644
--- a/drivers/staging/imx-drm/ipuv3-crtc.c
+++ b/drivers/staging/imx-drm/ipuv3-crtc.c
@@ -156,8 +156,15 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
if (mode->flags & DRM_MODE_FLAG_PVSYNC)
sig_cfg.Vsync_pol = 1;
- sig_cfg.enable_pol = 1;
- sig_cfg.clk_pol = 1;
+ /* Such flags are not availables in the DRM modes header,
+ * and we don't want to export them to userspace.
+ */
+ if (mode->private_flags & IMXDRM_MODE_FLAG_DE_HIGH)
+ sig_cfg.enable_pol = 1;
+
+ if (mode->private_flags & IMXDRM_MODE_FLAG_PIXDATA_POSEDGE)
+ sig_cfg.clk_pol = 1;
+
sig_cfg.width = mode->hdisplay;
sig_cfg.height = mode->vdisplay;
sig_cfg.pixel_fmt = out_pixel_fmt;
diff --git a/drivers/staging/imx-drm/parallel-display.c b/drivers/staging/imx-drm/parallel-display.c
index 24aa9be..09658ac 100644
--- a/drivers/staging/imx-drm/parallel-display.c
+++ b/drivers/staging/imx-drm/parallel-display.c
@@ -74,7 +74,35 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
if (np) {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
+ struct device_node *timings_np;
+ struct device_node *mode_np;
+ u32 val;
+
of_get_drm_display_mode(np, &imxpd->mode, 0);
+
+ /* Such flags are not availables in the DRM modes header,
+ * and we don't want to export them to userspace.
+ */
+ timings_np = of_get_child_by_name(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);
+
+ /* set de-active to 1 if not set */
+ of_property_read_u32(mode_np, "de-active", &val);
+ if (!!val)
+ imxpd->mode.private_flags |=
+ IMXDRM_MODE_FLAG_DE_HIGH;
+
+ /* set pixelclk-active to 1 if not set */
+ of_property_read_u32(mode_np, "pixelclk-active", &val);
+ if (!!val)
+ imxpd->mode.private_flags |=
+ IMXDRM_MODE_FLAG_PIXDATA_POSEDGE;
+ }
drm_mode_copy(mode, &imxpd->mode);
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
drm_mode_probed_add(connector, mode);
--
1.7.9.5
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