Add bitfields for PHY_CMN_CLK_CFG0 and PHY_CMN_CLK_CFG1 registers to
avoid hard-coding bit masks and shifts and make the code a bit more
readable.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
Changes in v5:
1. Split part touching pll_7nm_register() to new patch.
2. Update commit msg.
Changes in v4:
1. Add mising bitfield.h include
2. One more FIELD_GET and DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL (Dmitry)
Changes in v3:
1. Use FIELD_GET
2. Keep separate bit_clk_div and pix_clk_div
3. Rebase (some things moved to previous patches)
Changes in v2:
1. New patch
---
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
index 2fca469b10b33ac2350de5ab8a606704e84800ea..5ef5bc252019486c6f24f256d88d69ad3f6c838b 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
@@ -3,6 +3,7 @@
* Copyright (c) 2018, The Linux Foundation
*/
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/iopoll.h>
@@ -572,11 +573,11 @@ static void dsi_7nm_pll_save_state(struct msm_dsi_phy *phy)
cached->pll_out_div &= 0x3;
cmn_clk_cfg0 = readl(phy_base + REG_DSI_7nm_PHY_CMN_CLK_CFG0);
- cached->bit_clk_div = cmn_clk_cfg0 & 0xf;
- cached->pix_clk_div = (cmn_clk_cfg0 & 0xf0) >> 4;
+ cached->bit_clk_div = FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_3_0__MASK, cmn_clk_cfg0);
+ cached->pix_clk_div = FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_7_4__MASK, cmn_clk_cfg0);
cmn_clk_cfg1 = readl(phy_base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
- cached->pll_mux = cmn_clk_cfg1 & 0x3;
+ cached->pll_mux = FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK, cmn_clk_cfg1);
DBG("DSI PLL%d outdiv %x bit_clk_div %x pix_clk_div %x pll_mux %x",
pll_7nm->phy->id, cached->pll_out_div, cached->bit_clk_div,
@@ -598,7 +599,8 @@ static int dsi_7nm_pll_restore_state(struct msm_dsi_phy *phy)
dsi_pll_cmn_clk_cfg0_write(pll_7nm,
DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_3_0(cached->bit_clk_div) |
DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_7_4(cached->pix_clk_div));
- dsi_pll_cmn_clk_cfg1_update(pll_7nm, 0x3, cached->pll_mux);
+ dsi_pll_cmn_clk_cfg1_update(pll_7nm, DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK,
+ cached->pll_mux);
ret = dsi_pll_7nm_vco_set_rate(phy->vco_hw,
pll_7nm->vco_current_rate,
--
2.43.0
