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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <abhinavk@codeaurora.org>,
	Michael Turquette <mturquette@baylibre.com>
Cc: Jonathan Marek <jonathan@marek.ca>,
	Stephen Boyd <sboyd@kernel.org>, David Airlie <airlied@linux.ie>,
	Daniel Vetter <daniel@ffwll.ch>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org
Subject: [RFC 4/8] drm/msm/dsi: move msm_dsi_phy_pll_save_state call to msm_dsi_phy_disable
Date: Sat, 29 May 2021 03:25:04 +0300	[thread overview]
Message-ID: <20210529002508.3839467-5-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20210529002508.3839467-1-dmitry.baryshkov@linaro.org>

Move DSI PHY state saving from dsi manager to dsi_phy driver. This way
the manager does not need to know that the DSI state is not preserved
acrosss resets. Everything is handled by the DSI PHY driver.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dsi/dsi.h         |  1 -
 drivers/gpu/drm/msm/dsi/dsi_manager.c |  3 ---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 21 ++++++++++++---------
 3 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index c467ad609453..d64db1badd4b 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -169,7 +169,6 @@ int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
 void msm_dsi_phy_disable(struct msm_dsi_phy *phy);
 void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 			     enum msm_dsi_phy_usecase uc);
-void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy);
 void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy);
 
 #endif /* __DSI_CONNECTOR_H__ */
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 88d56a2bc8ab..de1c41dc5c15 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -524,9 +524,6 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 								id, ret);
 	}
 
-	/* Save PHY status if it is a clock source */
-	msm_dsi_phy_pll_save_state(msm_dsi->phy);
-
 	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 e5d25b44f8cb..b7b178cc318b 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -559,6 +559,14 @@ static void dsi_phy_disable_resource(struct msm_dsi_phy *phy)
 	pm_runtime_put_autosuspend(&phy->pdev->dev);
 }
 
+static void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy)
+{
+	if (phy->cfg->ops.save_pll_state) {
+		phy->cfg->ops.save_pll_state(phy);
+		phy->state_saved = true;
+	}
+}
+
 static int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy)
 {
 	int ret;
@@ -845,6 +853,10 @@ int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
 
 void msm_dsi_phy_disable(struct msm_dsi_phy *phy)
 {
+	/* Save PHY status if it is a clock source */
+	if (phy->usecase != MSM_DSI_PHY_SLAVE)
+		msm_dsi_phy_pll_save_state(phy);
+
 	if (!phy || !phy->cfg->ops.disable)
 		return;
 
@@ -860,15 +872,6 @@ void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 	if (phy)
 		phy->usecase = uc;
 }
-
-void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy)
-{
-	if (phy->cfg->ops.save_pll_state) {
-		phy->cfg->ops.save_pll_state(phy);
-		phy->state_saved = true;
-	}
-}
-
 void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy)
 {
 	msm_disp_snapshot_add_block(disp_state,
-- 
2.30.2


  parent reply	other threads:[~2021-05-29  0:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-29  0:25 [RFC 0/8] drm/msm: split DSI PHY to generic PHY subsystem Dmitry Baryshkov
2021-05-29  0:25 ` [RFC 1/8] drm/msm/dsi: make msm_dsi_phy_pll_restore_state static function Dmitry Baryshkov
2021-05-29  0:25 ` [RFC 2/8] drm/msm/dsi: save PLL registers across first PHY reset Dmitry Baryshkov
2021-05-29  0:25 ` [RFC 3/8] drm/msm/dsi: drop msm_dsi_phy_pll_save_state from 7nm and 10nm drivers Dmitry Baryshkov
2021-05-29  0:25 ` Dmitry Baryshkov [this message]
2021-05-29  0:25 ` [RFC 5/8] lib: add small API for handling register snapshots Dmitry Baryshkov
2021-06-03 14:45   ` Rob Clark
2021-06-03 16:33     ` Dmitry Baryshkov
2021-06-08 17:04       ` Rob Clark
2021-05-29  0:25 ` [RFC 6/8] drm/msm: port msm_disp_snapshot to dump_state Dmitry Baryshkov
2021-05-29  0:25 ` [RFC 7/8] drm/msm: do include unused headers in msm_disp_snapshot.h Dmitry Baryshkov

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