On Mon, 22 Apr 2024, Ville Syrjala <ville.syrj...@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Drop all the local variables for the DPLL dividers for vlv/chv
> and just consult the state directly.
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dpll.c | 62 ++++++++++-------------
> 1 file changed, 27 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c
> b/drivers/gpu/drm/i915/display/intel_dpll.c
> index b95032651da0..01f800b6b30e 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll.c
> @@ -1899,20 +1899,13 @@ static void vlv_prepare_pll(const struct
> intel_crtc_state *crtc_state)
> {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> + const struct dpll *clock = &crtc_state->dpll;
> enum dpio_phy phy = vlv_pipe_to_phy(crtc->pipe);
> enum pipe pipe = crtc->pipe;
> - u32 mdiv;
> - u32 bestn, bestm1, bestm2, bestp1, bestp2;
> - u32 coreclk, reg_val;
> + u32 mdiv, coreclk, reg_val;
>
> vlv_dpio_get(dev_priv);
>
> - bestn = crtc_state->dpll.n;
> - bestm1 = crtc_state->dpll.m1;
> - bestm2 = crtc_state->dpll.m2;
> - bestp1 = crtc_state->dpll.p1;
> - bestp2 = crtc_state->dpll.p2;
> -
> /* See eDP HDMI DPIO driver vbios notes doc */
>
> /* PLL B needs special handling */
> @@ -1931,10 +1924,12 @@ static void vlv_prepare_pll(const struct
> intel_crtc_state *crtc_state)
> vlv_dpio_write(dev_priv, phy, VLV_CMN_DW0, 0x610);
>
> /* Set idtafcrecal before PLL is enabled */
> - mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
> - mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
> - mdiv |= ((bestn << DPIO_N_SHIFT));
> - mdiv |= (1 << DPIO_K_SHIFT);
> + mdiv = (clock->m1 << DPIO_M1DIV_SHIFT) |
> + (clock->m2 & DPIO_M2DIV_MASK) |
> + (clock->p1 << DPIO_P1_SHIFT) |
> + (clock->p2 << DPIO_P2_SHIFT) |
> + (clock->n << DPIO_N_SHIFT) |
> + (1 << DPIO_K_SHIFT);
>
> /*
> * Post divider depends on pixel clock rate, DAC vs digital (and LVDS,
> @@ -2030,19 +2025,14 @@ static void chv_prepare_pll(const struct
> intel_crtc_state *crtc_state)
> {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> + const struct dpll *clock = &crtc_state->dpll;
> enum pipe pipe = crtc->pipe;
> enum dpio_channel port = vlv_pipe_to_channel(pipe);
> enum dpio_phy phy = vlv_pipe_to_phy(crtc->pipe);
> - u32 loopfilter, tribuf_calcntr;
> - u32 bestm2, bestp1, bestp2, bestm2_frac;
> - u32 dpio_val;
> - int vco;
> + u32 dpio_val, loopfilter, tribuf_calcntr;
> + u32 m2_frac;
>
> - bestm2_frac = crtc_state->dpll.m2 & 0x3fffff;
> - bestm2 = crtc_state->dpll.m2 >> 22;
> - bestp1 = crtc_state->dpll.p1;
> - bestp2 = crtc_state->dpll.p2;
> - vco = crtc_state->dpll.vco;
> + m2_frac = clock->m2 & 0x3fffff;
> dpio_val = 0;
> loopfilter = 0;
>
> @@ -2050,27 +2040,29 @@ static void chv_prepare_pll(const struct
> intel_crtc_state *crtc_state)
>
> /* p1 and p2 divider */
> vlv_dpio_write(dev_priv, phy, CHV_CMN_DW13(port),
> - 5 << DPIO_CHV_S1_DIV_SHIFT |
> - bestp1 << DPIO_CHV_P1_DIV_SHIFT |
> - bestp2 << DPIO_CHV_P2_DIV_SHIFT |
> - 1 << DPIO_CHV_K_DIV_SHIFT);
> + 5 << DPIO_CHV_S1_DIV_SHIFT |
> + clock->p1 << DPIO_CHV_P1_DIV_SHIFT |
> + clock->p2 << DPIO_CHV_P2_DIV_SHIFT |
> + 1 << DPIO_CHV_K_DIV_SHIFT);
>
> /* Feedback post-divider - m2 */
> - vlv_dpio_write(dev_priv, phy, CHV_PLL_DW0(port), bestm2);
> + vlv_dpio_write(dev_priv, phy, CHV_PLL_DW0(port),
> + clock->m2 >> 22);
>
> /* Feedback refclk divider - n and m1 */
> vlv_dpio_write(dev_priv, phy, CHV_PLL_DW1(port),
> - DPIO_CHV_M1_DIV_BY_2 |
> - 1 << DPIO_CHV_N_DIV_SHIFT);
> + DPIO_CHV_M1_DIV_BY_2 |
> + 1 << DPIO_CHV_N_DIV_SHIFT);
>
> /* M2 fraction division */
> - vlv_dpio_write(dev_priv, phy, CHV_PLL_DW2(port), bestm2_frac);
> + vlv_dpio_write(dev_priv, phy, CHV_PLL_DW2(port),
> + m2_frac);
>
> /* M2 fraction division enable */
> dpio_val = vlv_dpio_read(dev_priv, phy, CHV_PLL_DW3(port));
> dpio_val &= ~(DPIO_CHV_FEEDFWD_GAIN_MASK | DPIO_CHV_FRAC_DIV_EN);
> dpio_val |= (2 << DPIO_CHV_FEEDFWD_GAIN_SHIFT);
> - if (bestm2_frac)
> + if (m2_frac)
> dpio_val |= DPIO_CHV_FRAC_DIV_EN;
> vlv_dpio_write(dev_priv, phy, CHV_PLL_DW3(port), dpio_val);
>
> @@ -2079,22 +2071,22 @@ static void chv_prepare_pll(const struct
> intel_crtc_state *crtc_state)
> dpio_val &= ~(DPIO_CHV_INT_LOCK_THRESHOLD_MASK |
> DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE);
> dpio_val |= (0x5 << DPIO_CHV_INT_LOCK_THRESHOLD_SHIFT);
> - if (!bestm2_frac)
> + if (!m2_frac)
> dpio_val |= DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE;
> vlv_dpio_write(dev_priv, phy, CHV_PLL_DW9(port), dpio_val);
>
> /* Loop filter */
> - if (vco == 5400000) {
> + if (clock->vco == 5400000) {
> loopfilter |= (0x3 << DPIO_CHV_PROP_COEFF_SHIFT);
> loopfilter |= (0x8 << DPIO_CHV_INT_COEFF_SHIFT);
> loopfilter |= (0x1 << DPIO_CHV_GAIN_CTRL_SHIFT);
> tribuf_calcntr = 0x9;
> - } else if (vco <= 6200000) {
> + } else if (clock->vco <= 6200000) {
> loopfilter |= (0x5 << DPIO_CHV_PROP_COEFF_SHIFT);
> loopfilter |= (0xB << DPIO_CHV_INT_COEFF_SHIFT);
> loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
> tribuf_calcntr = 0x9;
> - } else if (vco <= 6480000) {
> + } else if (clock->vco <= 6480000) {
> loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT);
> loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT);
> loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
--
Jani Nikula, Intel
