Re: [Freedreno] [PATCH v3 16/25] drm/msm/dpu: simplify vco_delay handling in dsi_phy_28nm driver

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On 2021-03-27 04:02, Dmitry Baryshkov wrote:
Instead of setting the variable and then using it just in the one place,
determine vco_delay directly at the PLL configuration time.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
The subject line should still be "drm/msm/dsi" and not "drm/msm/dpu".
Once thats fixed, please apply
Reviewed-by: Abhinav Kumar <abhinavk@xxxxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
index 3e9b7949b038..ed369eb18e9d 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
@@ -72,8 +72,6 @@ struct dsi_pll_28nm {
 	struct platform_device *pdev;
 	void __iomem *mmio;

-	int vco_delay;
-
 	struct pll_28nm_cached_state cached_state;
 };

@@ -212,8 +210,10 @@ static int dsi_pll_28nm_clk_set_rate(struct
clk_hw *hw, unsigned long rate,
 	pll_write(base + REG_DSI_28nm_PHY_PLL_SDM_CFG4, 0x00);

 	/* Add hardware recommended delay for correct PLL configuration */
-	if (pll_28nm->vco_delay)
-		udelay(pll_28nm->vco_delay);
+	if (pll->cfg->quirks & DSI_PHY_28NM_QUIRK_PHY_LP)
+		udelay(1000);
+	else
+		udelay(1);

 	pll_write(base + REG_DSI_28nm_PHY_PLL_REFCLK_CFG, refclk_cfg);
 	pll_write(base + REG_DSI_28nm_PHY_PLL_PWRGEN_CFG, 0x00);
@@ -580,10 +580,6 @@ static int dsi_pll_28nm_init(struct msm_dsi_phy *phy)

 	pll = &pll_28nm->base;
 	pll->cfg = phy->cfg;
-	if (phy->cfg->quirks & DSI_PHY_28NM_QUIRK_PHY_LP)
-		pll_28nm->vco_delay = 1000;
-	else
-		pll_28nm->vco_delay = 1;

 	ret = pll_28nm_register(pll_28nm, phy->provided_clocks->hws);
 	if (ret) {




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