On 27.05.2019 12:21, Yannick Fertré wrote:
> These new physical operations are helpful to power_on/off the dsi
> wrapper. If the dsi wrapper is powered in video mode, the display
> controller (ltdc) register access will hang when DSI fifos are full.
>
> Signed-off-by: Yannick Fertré <yannick.fer...@st.com>
Reviewed-by: Andrzej Hajda <a.ha...@samsung.com>
--
Regards
Andrzej
> ---
> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> index 01db020..0ab32fe 100644
> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> @@ -210,10 +210,27 @@ static int dw_mipi_dsi_phy_init(void *priv_data)
> if (ret)
> DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n");
>
> + return 0;
> +}
> +
> +static void dw_mipi_dsi_phy_power_on(void *priv_data)
> +{
> + struct dw_mipi_dsi_stm *dsi = priv_data;
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> /* Enable the DSI wrapper */
> dsi_set(dsi, DSI_WCR, WCR_DSIEN);
> +}
>
> - return 0;
> +static void dw_mipi_dsi_phy_power_off(void *priv_data)
> +{
> + struct dw_mipi_dsi_stm *dsi = priv_data;
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> + /* Disable the DSI wrapper */
> + dsi_clear(dsi, DSI_WCR, WCR_DSIEN);
> }
>
> static int
> @@ -287,6 +304,8 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct
> drm_display_mode *mode,
>
> static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = {
> .init = dw_mipi_dsi_phy_init,
> + .power_on = dw_mipi_dsi_phy_power_on,
> + .power_off = dw_mipi_dsi_phy_power_off,
> .get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
> };
>
