At the moment VSYNC/HSYNC/DE high/low flags set by the panel/encoder
drivers get lost when the videotimings are translated to DRM's
videomode, as DRM's mode does not have corresponding flags.
DRM has bus-flags for this purpose, and while it lacks a few flags at
the moment, it should be used here. However, until we rewrite omapdrm's
device model, using bus-flags is rather difficult.
As a short term fix, this patch makes sure that every time the videomode
is set in omap_crtc_mode_set_nofb(), the driver asks for the SYNC/DE
flags from the panel/encoder drivers, and thus we get the correct flags
into use.
Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
---
drivers/gpu/drm/omapdrm/omap_connector.c | 8 +++++--
drivers/gpu/drm/omapdrm/omap_crtc.c | 40 +++++++++++++++++++++++++++++---
2 files changed, 43 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c
b/drivers/gpu/drm/omapdrm/omap_connector.c
index 50d2b641c28b..c24b6b783e9a 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -146,8 +146,6 @@ static int omap_connector_mode_valid(struct drm_connector
*connector,
int r, ret = MODE_BAD;
drm_display_mode_to_videomode(mode, &vm);
- vm.flags |= DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE |
- DISPLAY_FLAGS_SYNC_NEGEDGE;
mode->vrefresh = drm_mode_vrefresh(mode);
/*
@@ -162,6 +160,12 @@ static int omap_connector_mode_valid(struct drm_connector
*connector,
dssdrv->get_timings(dssdev, &t);
+ /*
+ * Ignore the flags, as we don't get them from
+ * drm_display_mode_to_videomode.
+ */
+ t.flags = 0;
+
if (memcmp(&vm, &t, sizeof(vm)))
r = -EINVAL;
else
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c
b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 1db96b077ae8..4f03f74685f0 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -373,6 +373,11 @@ static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ struct omap_drm_private *priv = crtc->dev->dev_private;
+ const u32 flags_mask = DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_DE_LOW |
+ DISPLAY_FLAGS_PIXDATA_POSEDGE | DISPLAY_FLAGS_PIXDATA_NEGEDGE |
+ DISPLAY_FLAGS_SYNC_POSEDGE | DISPLAY_FLAGS_SYNC_NEGEDGE;
+ unsigned int i;
DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
omap_crtc->name, mode->base.id, mode->name,
@@ -382,9 +387,38 @@ static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
mode->type, mode->flags);
drm_display_mode_to_videomode(mode, &omap_crtc->vm);
- omap_crtc->vm.flags |= DISPLAY_FLAGS_DE_HIGH |
- DISPLAY_FLAGS_PIXDATA_POSEDGE |
- DISPLAY_FLAGS_SYNC_NEGEDGE;
+
+ /*
+ * HACK: This fixes the vm flags.
+ * struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags
+ * and they get lost when converting back and forth between
+ * struct drm_display_mode and struct videomode. The hack below
+ * goes and fetches the missing flags from the panel drivers.
+ *
+ * Correct solution would be to use DRM's bus-flags, but that's not
+ * easily possible before the omapdrm's panel/encoder driver model
+ * has been changed to the DRM model.
+ */
+
+ for (i = 0; i < priv->num_encoders; ++i) {
+ struct drm_encoder *encoder = priv->encoders[i];
+
+ if (encoder->crtc == crtc) {
+ struct omap_dss_device *dssdev;
+
+ dssdev = omap_encoder_get_dssdev(encoder);
+
+ if (dssdev) {
+ struct videomode vm = {0};
+
+ dssdev->driver->get_timings(dssdev, &vm);
+
+ omap_crtc->vm.flags |= vm.flags & flags_mask;
+ }
+
+ break;
+ }
+ }
}
static int omap_crtc_atomic_check(struct drm_crtc *crtc,
--
2.7.4
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