On Thu, 30 Apr 2015, Vandana Kannan <vandana.kannan@xxxxxxxxx> wrote:
> BXT does not have PP_DIV register. Making changes to handle this.
>
> Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx>
> Signed-off-by: Kumar, Mahesh <mahesh1.kumar@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 2 ++
> drivers/gpu/drm/i915/i915_suspend.c | 8 ++++--
> drivers/gpu/drm/i915/intel_dp.c | 56 +++++++++++++++++++++++++++++--------
> 3 files changed, 52 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 36805b6..580f5cb 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6315,6 +6315,8 @@ enum skl_disp_power_wells {
> #define PCH_PP_CONTROL 0xc7204
> #define PANEL_UNLOCK_REGS (0xabcd << 16)
> #define PANEL_UNLOCK_MASK (0xffff << 16)
> +#define BXT_POWER_CYCLE_DELAY_MASK (0x1f0)
> +#define BXT_POWER_CYCLE_DELAY_SHIFT 4
> #define EDP_FORCE_VDD (1 << 3)
> #define EDP_BLC_ENABLE (1 << 2)
> #define PANEL_POWER_RESET (1 << 1)
> diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
> index e91d637..24e0b06 100644
> --- a/drivers/gpu/drm/i915/i915_suspend.c
> +++ b/drivers/gpu/drm/i915/i915_suspend.c
> @@ -48,7 +48,9 @@ static void i915_save_display(struct drm_device *dev)
> dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
> dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
> dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
> - dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
> + if (!IS_BROXTON(dev))
> + dev_priv->regfile.savePP_DIVISOR =
> + I915_READ(PCH_PP_DIVISOR);
> } else if (!IS_VALLEYVIEW(dev)) {
> dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL);
> dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
> @@ -82,7 +84,9 @@ static void i915_restore_display(struct drm_device *dev)
> if (!HAS_GMCH_DISPLAY(dev)) {
> I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS);
> I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS);
> - I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR);
> + if (!IS_BROXTON(dev))
> + I915_WRITE(PCH_PP_DIVISOR,
> + dev_priv->regfile.savePP_DIVISOR);
Again, no need to do this in i915_suspend.c.
> I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL);
> } else if (!IS_VALLEYVIEW(dev)) {
> I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS);
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 68e10c1..37514d3 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4954,8 +4954,8 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct edp_power_seq cur, vbt, spec,
> *final = &intel_dp->pps_delays;
> - u32 pp_on, pp_off, pp_div, pp;
> - int pp_ctrl_reg, pp_on_reg, pp_off_reg, pp_div_reg;
> + u32 pp_on, pp_off, pp_div = 0, pp_ctl = 0, pp;
> + int pp_ctrl_reg, pp_on_reg, pp_off_reg, pp_div_reg = 0;
>
> lockdep_assert_held(&dev_priv->pps_mutex);
>
> @@ -4964,10 +4964,16 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
> return;
>
> if (!HAS_GMCH_DISPLAY(dev)) {
> + /*
> + * TODO: BXT has 2 sets of PPS registers.
> + * Correct Register for Broxton need to be identified
> + * using VBT. hardcoding for now
> + */
This comment really belongs in the previous patch, which would add the
if (IS_BROXTON(dev)) branch as I suggested.
> pp_ctrl_reg = PCH_PP_CONTROL;
> pp_on_reg = PCH_PP_ON_DELAYS;
> pp_off_reg = PCH_PP_OFF_DELAYS;
> - pp_div_reg = PCH_PP_DIVISOR;
> + if (!IS_BROXTON(dev))
> + pp_div_reg = PCH_PP_DIVISOR;
And thus this is naturally included in the previous patch as well.
The rest will probably need some updates - maybe it needs to be fully
incorporated into the previous patch.
> } else {
> enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
>
> @@ -4984,7 +4990,10 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
>
> pp_on = I915_READ(pp_on_reg);
> pp_off = I915_READ(pp_off_reg);
> - pp_div = I915_READ(pp_div_reg);
> + if (!IS_BROXTON(dev))
> + pp_div = I915_READ(pp_div_reg);
> + else
> + pp_ctl = I915_READ(pp_ctrl_reg);
>
> /* Pull timing values out of registers */
> cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
> @@ -4999,8 +5008,12 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
> cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
> PANEL_POWER_DOWN_DELAY_SHIFT;
>
> - cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
> - PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
> + if (IS_BROXTON(dev))
> + cur.t11_t12 = (((pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >>
> + BXT_POWER_CYCLE_DELAY_SHIFT) - 1) * 1000;
> + else
> + cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
> + PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
>
> DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
> cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12);
> @@ -5057,16 +5070,22 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
> struct drm_i915_private *dev_priv = dev->dev_private;
> u32 pp_on, pp_off, pp_div, port_sel = 0;
> int div = HAS_PCH_SPLIT(dev) ? intel_pch_rawclk(dev) : intel_hrawclk(dev);
> - int pp_on_reg, pp_off_reg, pp_div_reg;
> + int pp_on_reg, pp_off_reg, pp_div_reg = 0, pp_ctrl_reg;
> enum port port = dp_to_dig_port(intel_dp)->port;
> const struct edp_power_seq *seq = &intel_dp->pps_delays;
>
> lockdep_assert_held(&dev_priv->pps_mutex);
>
> if (!HAS_GMCH_DISPLAY(dev)) {
> + /*
> + * TODO: Correct Register for Broxton need to be identified
> + * using VBT. hardcoding for now
> + */
> pp_on_reg = PCH_PP_ON_DELAYS;
> pp_off_reg = PCH_PP_OFF_DELAYS;
> - pp_div_reg = PCH_PP_DIVISOR;
> + pp_ctrl_reg = PCH_PP_CONTROL;
> + if (!IS_BROXTON(dev))
> + pp_div_reg = PCH_PP_DIVISOR;
> } else {
> enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
>
> @@ -5089,9 +5108,16 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
> (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
> /* Compute the divisor for the pp clock, simply match the Bspec
> * formula. */
> - pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
> - pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
> - << PANEL_POWER_CYCLE_DELAY_SHIFT);
> + if (IS_BROXTON(dev)) {
> + pp_div = I915_READ(pp_ctrl_reg);
> + pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK;
> + pp_div |= (DIV_ROUND_UP((seq->t11_t12 + 1), 1000)
> + << BXT_POWER_CYCLE_DELAY_SHIFT);
> + } else {
> + pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
> + pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
> + << PANEL_POWER_CYCLE_DELAY_SHIFT);
> + }
>
> /* Haswell doesn't have any port selection bits for the panel
> * power sequencer any more. */
> @@ -5108,11 +5134,17 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
>
> I915_WRITE(pp_on_reg, pp_on);
> I915_WRITE(pp_off_reg, pp_off);
> - I915_WRITE(pp_div_reg, pp_div);
> + if (IS_BROXTON(dev))
> + I915_WRITE(pp_ctrl_reg, pp_div);
> + else
> + I915_WRITE(pp_div_reg, pp_div);
>
> DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
> I915_READ(pp_on_reg),
> I915_READ(pp_off_reg),
> + IS_BROXTON(dev) ?
> + ((I915_READ(pp_ctrl_reg) && BXT_POWER_CYCLE_DELAY_MASK)
> + >> BXT_POWER_CYCLE_DELAY_SHIFT) :
> I915_READ(pp_div_reg));
> }
>
> --
> 2.0.1
>
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--
Jani Nikula, Intel Open Source Technology Center
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