On 14/02/2025 16:20, Dmitry Baryshkov wrote:
> On Fri, Feb 14, 2025 at 04:08:44PM +0100, Krzysztof Kozlowski wrote:
>> 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. While touching the lines in dsi_7nm_pll_save_state()
>> resulting cached->pix_clk_div assignment would be too big, so just
>> combine pix_clk_div and bit_clk_div into one cached state to make
>> everything simpler.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlow...@linaro.org>
>>
>> ---
>>
>> 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 | 12 +++++++-----
>> drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml | 1 +
>> 2 files changed, 8 insertions(+), 5 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
>> 798168180c1ab6c96ec2384f854302720cb27932..a8a5b41b63fb78348038c8f9fbb141aab2b07c7a
>> 100644
>> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
>> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
>> @@ -572,11 +572,11 @@ 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 = cmn_clk_cfg1 &
>> DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK;
>
> FIELD_GET.
Ack
>
>>
>> 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 +598,8 @@ 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);
>
> DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL(cached->pll_mux)
>
>>
>> ret = dsi_pll_7nm_vco_set_rate(phy->vco_hw,
>> pll_7nm->vco_current_rate,
>> @@ -739,7 +740,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm,
>> struct clk_hw **provide
>> u32 data;
>>
>> data = readl(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
>> - writel(data | 3, pll_7nm->phy->base +
>> REG_DSI_7nm_PHY_CMN_CLK_CFG1);
>> + writel(data | DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK,
>
> data | DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL(3)
Ack
Best regards,
Krzysztof
