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Date: Mon, 2 Mar 2020 21:49:20 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Harigovindan P <harigovi@...eaurora.org>, Rob Clark <robdclark@...omium.org>, Sasha Levin <sashal@...nel.org>, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org Subject: [PATCH AUTOSEL 4.14 09/22] drm/msm/dsi: save pll state before dsi host is powered off From: Harigovindan P <harigovi@...eaurora.org> [ Upstream commit a1028dcfd0dd97884072288d0c8ed7f30399b528 ] Save pll state before dsi host is powered off. Without this change some register values gets resetted. Signed-off-by: Harigovindan P <harigovi@...eaurora.org> Signed-off-by: Rob Clark <robdclark@...omium.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/gpu/drm/msm/dsi/dsi_manager.c | 5 +++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 4 ---- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c index 7d46399a39b4d..9fbfa9f94e6ce 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -543,6 +543,7 @@ 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; @@ -583,6 +584,10 @@ 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); diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c index 7c9bf91bc22b6..c0a7fa56d9a74 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c @@ -613,10 +613,6 @@ 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); -- 2.20.1
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