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drm/msm/dsi: save pll state before dsi host is powered off 

[ Upstream commit a1028dcfd0 ]

Save pll state before dsi host is powered off. Without this change
some register values gets resetted.

Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Harigovindan P 2020-02-06 14:26:15 +05:30 committed by Greg Kroah-Hartman
parent 26bfd300f7
commit b6e3a6be56
2 changed files with 5 additions and 4 deletions
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5
drivers/gpu/drm/msm/dsi/dsi_manager.c
View File

@ -479,6 +479,7 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
struct mipi_dsi_host *host = msm_dsi->host;
struct drm_panel *panel = msm_dsi->panel;
struct msm_dsi_pll *src_pll;
bool is_dual_dsi = IS_DUAL_DSI();
int ret;
@ -519,6 +520,10 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
id, ret);
}
/* Save PLL status if it is a clock source */
src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
msm_dsi_pll_save_state(src_pll);
ret = msm_dsi_host_power_off(host);
if (ret)
pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);

4
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
View File

@ -724,10 +724,6 @@ void msm_dsi_phy_disable(struct msm_dsi_phy *phy)
if (!phy || !phy->cfg->ops.disable)
return;
/* Save PLL status if it is a clock source */
if (phy->usecase != MSM_DSI_PHY_SLAVE)
msm_dsi_pll_save_state(phy->pll);
phy->cfg->ops.disable(phy);
dsi_phy_regulator_disable(phy);