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drm/stm: dsi: add power on/off phy ops

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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.fertre@st.com>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1558952499-15418-3-git-send-email-yannick.fertre@st.com
This commit is contained in:
Yannick Fertré 2019-05-27 12:21:39 +02:00 committed by Andrzej Hajda
parent a3e69b86cf
commit ee7668bc68
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
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@ -210,10 +210,27 @@ static int dw_mipi_dsi_phy_init(void *priv_data)
if (ret) if (ret)
DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n"); 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 */ /* Enable the DSI wrapper */
dsi_set(dsi, DSI_WCR, WCR_DSIEN); 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 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 = { static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = {
.init = dw_mipi_dsi_phy_init, .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, .get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
}; };