diff mbox series

[v4,66/80] drm/omap: dsi: set LP/HS before update

Message ID 20201124124538.660710-67-tomi.valkeinen@ti.com (mailing list archive)
State New
Headers show
Series Convert DSI code to use drm_mipi_dsi and drm_panel | expand

Commit Message

Tomi Valkeinen Nov. 24, 2020, 12:45 p.m. UTC
We currently use a single VC for sending commands and pixel data. The
LP/HS mode for pixel data is correct by accident, as we have set the VC
to HS already earlier.

However, if we use a different VC for video data, the VC is in LP mode.
Fix this by always setting the LP/HS mode before starting a frame
update.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/dss/dsi.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Laurent Pinchart Dec. 1, 2020, 12:20 a.m. UTC | #1
Hi Tomi,

Thank you for the patch.

On Tue, Nov 24, 2020 at 02:45:24PM +0200, Tomi Valkeinen wrote:
> We currently use a single VC for sending commands and pixel data. The
> LP/HS mode for pixel data is correct by accident, as we have set the VC
> to HS already earlier.
> 
> However, if we use a different VC for video data, the VC is in LP mode.
> Fix this by always setting the LP/HS mode before starting a frame
> update.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/omapdrm/dss/dsi.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index c3f13226ac26..41d6231d6e31 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -3918,6 +3918,8 @@ static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
>  
>  	dsi_set_ulps_auto(dsi, false);
>  
> +	dsi_vc_enable_hs(dssdev, vc, !(dsi->dsidev->mode_flags & MIPI_DSI_MODE_LPM));
> +
>  	r = _dsi_send_nop(dsi, vc, dsi->dsidev->channel);
>  	if (r < 0) {
>  		DSSWARN("failed to send nop between frames: %d\n", r);
diff mbox series

Patch

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index c3f13226ac26..41d6231d6e31 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -3918,6 +3918,8 @@  static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
 
 	dsi_set_ulps_auto(dsi, false);
 
+	dsi_vc_enable_hs(dssdev, vc, !(dsi->dsidev->mode_flags & MIPI_DSI_MODE_LPM));
+
 	r = _dsi_send_nop(dsi, vc, dsi->dsidev->channel);
 	if (r < 0) {
 		DSSWARN("failed to send nop between frames: %d\n", r);