[PATCH v2 6/8] drm/msm/dsi: stop setting clock parents manually

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <abhinavk@codeaurora.org>,
	Rob Herring <robh+dt@kernel.org>
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, devicetree@vger.kernel.org
Subject: [PATCH v2 6/8] drm/msm/dsi: stop setting clock parents manually
Date: Sat, 10 Jul 2021 00:07:27 +0300	[thread overview]
Message-ID: <20210709210729.953114-7-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20210709210729.953114-1-dmitry.baryshkov@linaro.org>

There is no reason to set clock parents manually, use device tree to
assign DSI/display clock parents to DSI PHY clocks. Dropping this manual
setup allows us to drop repeating code and to move registration of hw
clock providers to generic place.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
---
 drivers/gpu/drm/msm/dsi/dsi.h         |  2 --
 drivers/gpu/drm/msm/dsi/dsi_host.c    | 51 ---------------------------
 drivers/gpu/drm/msm/dsi/dsi_manager.c |  5 ---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 11 ------
 4 files changed, 69 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 9b8e9b07eced..1f0ec78c6b05 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -170,8 +170,6 @@ void msm_dsi_phy_get_shared_timings(struct msm_dsi_phy *phy,
 			struct msm_dsi_phy_shared_timings *shared_timing);
 void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 			     enum msm_dsi_phy_usecase uc);
-int msm_dsi_phy_get_clk_provider(struct msm_dsi_phy *phy,
-	struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
 void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy);
 int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy);
 void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy);
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index ed504fe5074f..1fa6ee12395b 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -2219,57 +2219,6 @@ void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
 	wmb();
 }
 
-int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
-	struct msm_dsi_phy *src_phy)
-{
-	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
-	struct clk *byte_clk_provider, *pixel_clk_provider;
-	int ret;
-
-	ret = msm_dsi_phy_get_clk_provider(src_phy,
-				&byte_clk_provider, &pixel_clk_provider);
-	if (ret) {
-		pr_info("%s: can't get provider from pll, don't set parent\n",
-			__func__);
-		return 0;
-	}
-
-	ret = clk_set_parent(msm_host->byte_clk_src, byte_clk_provider);
-	if (ret) {
-		pr_err("%s: can't set parent to byte_clk_src. ret=%d\n",
-			__func__, ret);
-		goto exit;
-	}
-
-	ret = clk_set_parent(msm_host->pixel_clk_src, pixel_clk_provider);
-	if (ret) {
-		pr_err("%s: can't set parent to pixel_clk_src. ret=%d\n",
-			__func__, ret);
-		goto exit;
-	}
-
-	if (msm_host->dsi_clk_src) {
-		ret = clk_set_parent(msm_host->dsi_clk_src, pixel_clk_provider);
-		if (ret) {
-			pr_err("%s: can't set parent to dsi_clk_src. ret=%d\n",
-				__func__, ret);
-			goto exit;
-		}
-	}
-
-	if (msm_host->esc_clk_src) {
-		ret = clk_set_parent(msm_host->esc_clk_src, byte_clk_provider);
-		if (ret) {
-			pr_err("%s: can't set parent to esc_clk_src. ret=%d\n",
-				__func__, ret);
-			goto exit;
-		}
-	}
-
-exit:
-	return ret;
-}
-
 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
 {
 	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 4ebfedc4a9ac..4a17f12b9316 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -78,7 +78,6 @@ static int dsi_mgr_setup_components(int id)
 			return ret;
 
 		msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
-		ret = msm_dsi_host_set_src_pll(msm_dsi->host, msm_dsi->phy);
 	} else if (!other_dsi) {
 		ret = 0;
 	} else {
@@ -105,10 +104,6 @@ static int dsi_mgr_setup_components(int id)
 					MSM_DSI_PHY_MASTER);
 		msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
 					MSM_DSI_PHY_SLAVE);
-		ret = msm_dsi_host_set_src_pll(msm_dsi->host, clk_master_dsi->phy);
-		if (ret)
-			return ret;
-		ret = msm_dsi_host_set_src_pll(other_dsi->host, clk_master_dsi->phy);
 	}
 
 	return ret;
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index 6ca6bfd4809b..952fd0b95865 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -835,17 +835,6 @@ void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 		phy->usecase = uc;
 }
 
-int msm_dsi_phy_get_clk_provider(struct msm_dsi_phy *phy,
-	struct clk **byte_clk_provider, struct clk **pixel_clk_provider)
-{
-	if (byte_clk_provider)
-		*byte_clk_provider = phy->provided_clocks->hws[DSI_BYTE_PLL_CLK]->clk;
-	if (pixel_clk_provider)
-		*pixel_clk_provider = phy->provided_clocks->hws[DSI_PIXEL_PLL_CLK]->clk;
-
-	return 0;
-}
-
 void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy)
 {
 	if (phy->cfg->ops.save_pll_state) {
-- 
2.30.2

