[Intel-gfx] [PATCH v2 2/9] drm/i915/display/power: use intel_de_rmw if possible
Jani Nikula
jani.nikula at linux.intel.com
Thu Feb 16 16:27:20 UTC 2023
On Thu, 05 Jan 2023, Rodrigo Vivi <rodrigo.vivi at intel.com> wrote:
> On Thu, Jan 05, 2023 at 02:10:39PM +0100, Andrzej Hajda wrote:
>> The helper makes the code more compact and readable.
>>
>> Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
>> ---
>> .../drm/i915/display/intel_display_power.c | 49 ++++-------
>> .../i915/display/intel_display_power_well.c | 82 ++++++-------------
>> 2 files changed, 39 insertions(+), 92 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
>> index 1a23ecd4623a53..90d7a623d6e3cc 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
>> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
>> @@ -1260,9 +1260,7 @@ static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
>> drm_err(&dev_priv->drm, "D_COMP RCOMP still in progress\n");
>>
>> if (allow_power_down) {
>> - val = intel_de_read(dev_priv, LCPLL_CTL);
>> - val |= LCPLL_POWER_DOWN_ALLOW;
>> - intel_de_write(dev_priv, LCPLL_CTL, val);
>> + intel_de_rmw(dev_priv, LCPLL_CTL, 0, LCPLL_POWER_DOWN_ALLOW);
>> intel_de_posting_read(dev_priv, LCPLL_CTL);
>> }
>> }
>> @@ -1306,9 +1304,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
>> drm_err(&dev_priv->drm, "LCPLL not locked yet\n");
>>
>> if (val & LCPLL_CD_SOURCE_FCLK) {
>> - val = intel_de_read(dev_priv, LCPLL_CTL);
>> - val &= ~LCPLL_CD_SOURCE_FCLK;
>> - intel_de_write(dev_priv, LCPLL_CTL, val);
>> + intel_de_rmw(dev_priv, LCPLL_CTL, LCPLL_CD_SOURCE_FCLK, 0);
>>
>> if (wait_for_us((intel_de_read(dev_priv, LCPLL_CTL) &
>> LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
>> @@ -1347,15 +1343,11 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
>> */
>> static void hsw_enable_pc8(struct drm_i915_private *dev_priv)
>> {
>> - u32 val;
>> -
>> drm_dbg_kms(&dev_priv->drm, "Enabling package C8+\n");
>>
>> - if (HAS_PCH_LPT_LP(dev_priv)) {
>> - val = intel_de_read(dev_priv, SOUTH_DSPCLK_GATE_D);
>> - val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
>> - intel_de_write(dev_priv, SOUTH_DSPCLK_GATE_D, val);
>> - }
>> + if (HAS_PCH_LPT_LP(dev_priv))
>> + intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
>> + PCH_LP_PARTITION_LEVEL_DISABLE, 0);
>>
>> lpt_disable_clkout_dp(dev_priv);
>> hsw_disable_lcpll(dev_priv, true, true);
>> @@ -1363,25 +1355,21 @@ static void hsw_enable_pc8(struct drm_i915_private *dev_priv)
>>
>> static void hsw_disable_pc8(struct drm_i915_private *dev_priv)
>> {
>> - u32 val;
>> -
>> drm_dbg_kms(&dev_priv->drm, "Disabling package C8+\n");
>>
>> hsw_restore_lcpll(dev_priv);
>> intel_init_pch_refclk(dev_priv);
>>
>> - if (HAS_PCH_LPT_LP(dev_priv)) {
>> - val = intel_de_read(dev_priv, SOUTH_DSPCLK_GATE_D);
>> - val |= PCH_LP_PARTITION_LEVEL_DISABLE;
>> - intel_de_write(dev_priv, SOUTH_DSPCLK_GATE_D, val);
>> - }
>> + if (HAS_PCH_LPT_LP(dev_priv))
>> + intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
>> + 0, PCH_LP_PARTITION_LEVEL_DISABLE);
>> }
>>
>> static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
>> bool enable)
>> {
>> i915_reg_t reg;
>> - u32 reset_bits, val;
>> + u32 reset_bits;
>>
>> if (IS_IVYBRIDGE(dev_priv)) {
>> reg = GEN7_MSG_CTL;
>> @@ -1394,14 +1382,7 @@ static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
>> if (DISPLAY_VER(dev_priv) >= 14)
>> reset_bits |= MTL_RESET_PICA_HANDSHAKE_EN;
>>
>> - val = intel_de_read(dev_priv, reg);
>> -
>> - if (enable)
>> - val |= reset_bits;
>> - else
>> - val &= ~reset_bits;
>> -
>> - intel_de_write(dev_priv, reg, val);
>> + intel_de_rmw(dev_priv, reg, reset_bits, enable ? reset_bits : 0);
>
> I believe we have a risk here since we were only cleaning if not enable.
> But anyway this looks the right thing to do here...
>
>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Pushed everything else in the series *except* this one, because there
was a minor conflict. Please rebase and resend.
Sorry for the delay, and thanks for the patches and review.
BR,
Jani.
>
>
>> }
>>
>> static void skl_display_core_init(struct drm_i915_private *dev_priv,
>> @@ -1618,7 +1599,6 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
>> {
>> struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
>> struct i915_power_well *well;
>> - u32 val;
>>
>> gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
>>
>> @@ -1670,11 +1650,10 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
>> intel_dmc_load_program(dev_priv);
>>
>> /* Wa_14011508470:tgl,dg1,rkl,adl-s,adl-p */
>> - if (DISPLAY_VER(dev_priv) >= 12) {
>> - val = DCPR_CLEAR_MEMSTAT_DIS | DCPR_SEND_RESP_IMM |
>> - DCPR_MASK_LPMODE | DCPR_MASK_MAXLATENCY_MEMUP_CLR;
>> - intel_de_rmw(dev_priv, GEN11_CHICKEN_DCPR_2, 0, val);
>> - }
>> + if (DISPLAY_VER(dev_priv) >= 12)
>> + intel_de_rmw(dev_priv, GEN11_CHICKEN_DCPR_2, 0,
>> + DCPR_CLEAR_MEMSTAT_DIS | DCPR_SEND_RESP_IMM |
>> + DCPR_MASK_LPMODE | DCPR_MASK_MAXLATENCY_MEMUP_CLR);
>>
>> /* Wa_14011503030:xelpd */
>> if (DISPLAY_VER(dev_priv) >= 13)
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
>> index 8710dd41ffd4c6..05b431f968cb49 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
>> +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
>> @@ -333,7 +333,6 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
>> {
>> const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
>> int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
>> - u32 val;
>>
>> if (power_well->desc->has_fuses) {
>> enum skl_power_gate pg;
>> @@ -356,9 +355,7 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
>> gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
>> }
>>
>> - val = intel_de_read(dev_priv, regs->driver);
>> - intel_de_write(dev_priv, regs->driver,
>> - val | HSW_PWR_WELL_CTL_REQ(pw_idx));
>> + intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx));
>>
>> hsw_wait_for_power_well_enable(dev_priv, power_well, false);
>>
>> @@ -380,14 +377,11 @@ static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
>> {
>> const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
>> int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
>> - u32 val;
>>
>> hsw_power_well_pre_disable(dev_priv,
>> power_well->desc->irq_pipe_mask);
>>
>> - val = intel_de_read(dev_priv, regs->driver);
>> - intel_de_write(dev_priv, regs->driver,
>> - val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
>> + intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0);
>> hsw_wait_for_power_well_disable(dev_priv, power_well);
>> }
>>
>> @@ -398,29 +392,22 @@ icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
>> const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
>> int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
>> enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well);
>> - u32 val;
>>
>> drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv));
>>
>> - val = intel_de_read(dev_priv, regs->driver);
>> - intel_de_write(dev_priv, regs->driver,
>> - val | HSW_PWR_WELL_CTL_REQ(pw_idx));
>> + intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx));
>>
>> - if (DISPLAY_VER(dev_priv) < 12) {
>> - val = intel_de_read(dev_priv, ICL_PORT_CL_DW12(phy));
>> - intel_de_write(dev_priv, ICL_PORT_CL_DW12(phy),
>> - val | ICL_LANE_ENABLE_AUX);
>> - }
>> + if (DISPLAY_VER(dev_priv) < 12)
>> + intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy),
>> + 0, ICL_LANE_ENABLE_AUX);
>>
>> hsw_wait_for_power_well_enable(dev_priv, power_well, false);
>>
>> /* Display WA #1178: icl */
>> if (pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
>> - !intel_bios_is_port_edp(dev_priv, (enum port)phy)) {
>> - val = intel_de_read(dev_priv, ICL_AUX_ANAOVRD1(pw_idx));
>> - val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
>> - intel_de_write(dev_priv, ICL_AUX_ANAOVRD1(pw_idx), val);
>> - }
>> + !intel_bios_is_port_edp(dev_priv, (enum port)phy))
>> + intel_de_rmw(dev_priv, ICL_AUX_ANAOVRD1(pw_idx),
>> + 0, ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS);
>> }
>>
>> static void
>> @@ -430,17 +417,12 @@ icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
>> const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
>> int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
>> enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well);
>> - u32 val;
>>
>> drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv));
>>
>> - val = intel_de_read(dev_priv, ICL_PORT_CL_DW12(phy));
>> - intel_de_write(dev_priv, ICL_PORT_CL_DW12(phy),
>> - val & ~ICL_LANE_ENABLE_AUX);
>> + intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy), ICL_LANE_ENABLE_AUX, 0);
>>
>> - val = intel_de_read(dev_priv, regs->driver);
>> - intel_de_write(dev_priv, regs->driver,
>> - val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
>> + intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0);
>>
>> hsw_wait_for_power_well_disable(dev_priv, power_well);
>> }
>> @@ -502,19 +484,15 @@ icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
>> const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
>> bool is_tbt = power_well->desc->is_tc_tbt;
>> bool timeout_expected;
>> - u32 val;
>>
>> icl_tc_port_assert_ref_held(dev_priv, power_well, dig_port);
>>
>> - val = intel_de_read(dev_priv, DP_AUX_CH_CTL(aux_ch));
>> - val &= ~DP_AUX_CH_CTL_TBT_IO;
>> - if (is_tbt)
>> - val |= DP_AUX_CH_CTL_TBT_IO;
>> - intel_de_write(dev_priv, DP_AUX_CH_CTL(aux_ch), val);
>> + intel_de_rmw(dev_priv, DP_AUX_CH_CTL(aux_ch),
>> + DP_AUX_CH_CTL_TBT_IO, is_tbt ? DP_AUX_CH_CTL_TBT_IO : 0);
>>
>> - val = intel_de_read(dev_priv, regs->driver);
>> - intel_de_write(dev_priv, regs->driver,
>> - val | HSW_PWR_WELL_CTL_REQ(i915_power_well_instance(power_well)->hsw.idx));
>> + intel_de_rmw(dev_priv, regs->driver,
>> + 0,
>> + HSW_PWR_WELL_CTL_REQ(i915_power_well_instance(power_well)->hsw.idx));
>>
>> /*
>> * An AUX timeout is expected if the TBT DP tunnel is down,
>> @@ -776,12 +754,8 @@ static void tgl_enable_dc3co(struct drm_i915_private *dev_priv)
>>
>> static void tgl_disable_dc3co(struct drm_i915_private *dev_priv)
>> {
>> - u32 val;
>> -
>> drm_dbg_kms(&dev_priv->drm, "Disabling DC3CO\n");
>> - val = intel_de_read(dev_priv, DC_STATE_EN);
>> - val &= ~DC_STATE_DC3CO_STATUS;
>> - intel_de_write(dev_priv, DC_STATE_EN, val);
>> + intel_de_rmw(dev_priv, DC_STATE_EN, DC_STATE_DC3CO_STATUS, 0);
>> gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
>> /*
>> * Delay of 200us DC3CO Exit time B.Spec 49196
>> @@ -820,8 +794,8 @@ void gen9_enable_dc5(struct drm_i915_private *dev_priv)
>>
>> /* Wa Display #1183: skl,kbl,cfl */
>> if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv))
>> - intel_de_write(dev_priv, GEN8_CHICKEN_DCPR_1,
>> - intel_de_read(dev_priv, GEN8_CHICKEN_DCPR_1) | SKL_SELECT_ALTERNATE_DC_EXIT);
>> + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
>> + 0, SKL_SELECT_ALTERNATE_DC_EXIT);
>>
>> gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
>> }
>> @@ -847,8 +821,8 @@ void skl_enable_dc6(struct drm_i915_private *dev_priv)
>>
>> /* Wa Display #1183: skl,kbl,cfl */
>> if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv))
>> - intel_de_write(dev_priv, GEN8_CHICKEN_DCPR_1,
>> - intel_de_read(dev_priv, GEN8_CHICKEN_DCPR_1) | SKL_SELECT_ALTERNATE_DC_EXIT);
>> + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
>> + 0, SKL_SELECT_ALTERNATE_DC_EXIT);
>>
>> gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
>> }
>> @@ -1149,18 +1123,14 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
>>
>> static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
>> {
>> - u32 val;
>> -
>> /*
>> * On driver load, a pipe may be active and driving a DSI display.
>> * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
>> * (and never recovering) in this case. intel_dsi_post_disable() will
>> * clear it when we turn off the display.
>> */
>> - val = intel_de_read(dev_priv, DSPCLK_GATE_D(dev_priv));
>> - val &= DPOUNIT_CLOCK_GATE_DISABLE;
>> - val |= VRHUNIT_CLOCK_GATE_DISABLE;
>> - intel_de_write(dev_priv, DSPCLK_GATE_D(dev_priv), val);
>> + intel_de_rmw(dev_priv, DSPCLK_GATE_D(dev_priv),
>> + ~DPOUNIT_CLOCK_GATE_DISABLE, VRHUNIT_CLOCK_GATE_DISABLE);
>>
>> /*
>> * Disable trickle feed and enable pnd deadline calculation
>> @@ -1276,8 +1246,7 @@ static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
>> * both PLLs disabled, or we risk losing DPIO and PLL
>> * synchronization.
>> */
>> - intel_de_write(dev_priv, DPIO_CTL,
>> - intel_de_read(dev_priv, DPIO_CTL) | DPIO_CMNRST);
>> + intel_de_rmw(dev_priv, DPIO_CTL, 0, DPIO_CMNRST);
>> }
>>
>> static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
>> @@ -1289,8 +1258,7 @@ static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
>> assert_pll_disabled(dev_priv, pipe);
>>
>> /* Assert common reset */
>> - intel_de_write(dev_priv, DPIO_CTL,
>> - intel_de_read(dev_priv, DPIO_CTL) & ~DPIO_CMNRST);
>> + intel_de_rmw(dev_priv, DPIO_CTL, DPIO_CMNRST, 0);
>>
>> vlv_set_power_well(dev_priv, power_well, false);
>> }
>> --
>> 2.34.1
>>
--
Jani Nikula, Intel Open Source Graphics Center
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