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Commit ee7668bc authored by Yannick Fertré's avatar Yannick Fertré Committed by Andrzej Hajda
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drm/stm: dsi: add power on/off phy ops 



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: default avatarYannick Fertré <yannick.fertre@st.com>
Acked-by: default avatarPhilippe Cornu <philippe.cornu@st.com>
Tested-by: default avatarPhilippe Cornu <philippe.cornu@st.com>
Reviewed-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1558952499-15418-3-git-send-email-yannick.fertre@st.com
parent a3e69b86

drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

+20 −1
Original line number Diff line number Diff line
@@ -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,

};