Hi Tomi,
Thank you for the patch.
On Tuesday 28 Mar 2017 16:08:14 Tomi Valkeinen wrote:
> 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 | 2 --
> drivers/gpu/drm/omapdrm/omap_crtc.c | 28 +++++++++++++++++++++++++---
> 2 files changed, 25 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c
> b/drivers/gpu/drm/omapdrm/omap_connector.c index 50d2b641c28b..d62c035f050f
> 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;
The dssdrv->get_timings() call below will return a video mode with polarity
flags set, which will then be compared to vm. As you don't set the vm flags
anymore, won't the comparison fail ?
> mode->vrefresh = drm_mode_vrefresh(mode);
>
> /*
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c
> b/drivers/gpu/drm/omapdrm/omap_crtc.c index 1db96b077ae8..606ef807741a
> 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;
> + int i;
i only takes positive values, you can make it an unsigned int.
>
> 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 +387,26 @@ 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;
> +
Could you add a HACK/FIXME comment to explain how this should be fixed
properly ? I want to make sure we won't forget to remove this hack.
> + 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,
--
Regards,
Laurent Pinchart
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