diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_bw.c')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_bw.c | 113 |
1 files changed, 109 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index f554c1974072..e91e0e0191fb 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -17,9 +17,15 @@ struct intel_qgv_point { u16 dclk, t_rp, t_rdpre, t_rc, t_ras, t_rcd; }; +struct intel_psf_gv_point { + u8 clk; /* clock in multiples of 16.6666 MHz */ +}; + struct intel_qgv_info { struct intel_qgv_point points[I915_NUM_QGV_POINTS]; + struct intel_psf_gv_point psf_points[I915_NUM_PSF_GV_POINTS]; u8 num_points; + u8 num_psf_points; u8 t_bl; }; @@ -84,6 +90,28 @@ static int icl_pcode_read_qgv_point_info(struct drm_i915_private *dev_priv, return 0; } +static int adls_pcode_read_psf_gv_point_info(struct drm_i915_private *dev_priv, + struct intel_psf_gv_point *points) +{ + u32 val = 0; + int ret; + int i; + + ret = sandybridge_pcode_read(dev_priv, + ICL_PCODE_MEM_SUBSYSYSTEM_INFO | + ADL_PCODE_MEM_SS_READ_PSF_GV_INFO, + &val, NULL); + if (ret) + return ret; + + for (i = 0; i < I915_NUM_PSF_GV_POINTS; i++) { + points[i].clk = val & 0xff; + val >>= 8; + } + + return 0; +} + int icl_pcode_restrict_qgv_points(struct drm_i915_private *dev_priv, u32 points_mask) { @@ -97,7 +125,7 @@ int icl_pcode_restrict_qgv_points(struct drm_i915_private *dev_priv, 1); if (ret < 0) { - drm_err(&dev_priv->drm, "Failed to disable qgv points (%d)\n", ret); + drm_err(&dev_priv->drm, "Failed to disable qgv points (%d) points: 0x%x\n", ret, points_mask); return ret; } @@ -111,6 +139,7 @@ static int icl_get_qgv_points(struct drm_i915_private *dev_priv, int i, ret; qi->num_points = dram_info->num_qgv_points; + qi->num_psf_points = dram_info->num_psf_gv_points; if (DISPLAY_VER(dev_priv) == 12) switch (dram_info->type) { @@ -148,6 +177,19 @@ static int icl_get_qgv_points(struct drm_i915_private *dev_priv, sp->t_rcd, sp->t_rc); } + if (qi->num_psf_points > 0) { + ret = adls_pcode_read_psf_gv_point_info(dev_priv, qi->psf_points); + if (ret) { + drm_err(&dev_priv->drm, "Failed to read PSF point data; PSF points will not be considered in bandwidth calculations.\n"); + qi->num_psf_points = 0; + } + + for (i = 0; i < qi->num_psf_points; i++) + drm_dbg_kms(&dev_priv->drm, + "PSF GV %d: CLK=%d \n", + i, qi->psf_points[i].clk); + } + return 0; } @@ -157,6 +199,16 @@ static int icl_calc_bw(int dclk, int num, int den) return DIV_ROUND_CLOSEST(num * dclk * 100, den * 6); } +static int adl_calc_psf_bw(int clk) +{ + /* + * clk is multiples of 16.666MHz (100/6) + * According to BSpec PSF GV bandwidth is + * calculated as BW = 64 * clk * 16.666Mhz + */ + return DIV_ROUND_CLOSEST(64 * clk * 100, 6); +} + static int icl_sagv_max_dclk(const struct intel_qgv_info *qi) { u16 dclk = 0; @@ -233,6 +285,7 @@ static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel bi->num_planes = (ipqdepth - clpchgroup) / clpchgroup + 1; bi->num_qgv_points = qi.num_points; + bi->num_psf_gv_points = qi.num_psf_points; for (j = 0; j < qi.num_points; j++) { const struct intel_qgv_point *sp = &qi.points[j]; @@ -256,6 +309,16 @@ static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel i, j, bi->num_planes, bi->deratedbw[j]); } + for (j = 0; j < qi.num_psf_points; j++) { + const struct intel_psf_gv_point *sp = &qi.psf_points[j]; + + bi->psf_bw[j] = adl_calc_psf_bw(sp->clk); + + drm_dbg_kms(&dev_priv->drm, + "BW%d / PSF GV %d: num_planes=%d bw=%u\n", + i, j, bi->num_planes, bi->psf_bw[j]); + } + if (bi->num_planes == 1) break; } @@ -321,6 +384,15 @@ static unsigned int icl_max_bw(struct drm_i915_private *dev_priv, return 0; } +static unsigned int adl_psf_bw(struct drm_i915_private *dev_priv, + int psf_gv_point) +{ + const struct intel_bw_info *bi = + &dev_priv->max_bw[0]; + + return bi->psf_bw[psf_gv_point]; +} + void intel_bw_init_hw(struct drm_i915_private *dev_priv) { if (!HAS_DISPLAY(dev_priv)) @@ -595,12 +667,24 @@ int intel_bw_atomic_check(struct intel_atomic_state *state) u32 allowed_points = 0; unsigned int max_bw_point = 0, max_bw = 0; unsigned int num_qgv_points = dev_priv->max_bw[0].num_qgv_points; - u32 mask = (1 << num_qgv_points) - 1; + unsigned int num_psf_gv_points = dev_priv->max_bw[0].num_psf_gv_points; + u32 mask = 0; /* FIXME earlier gens need some checks too */ if (DISPLAY_VER(dev_priv) < 11) return 0; + /* + * We can _not_ use the whole ADLS_QGV_PT_MASK here, as PCode rejects + * it with failure if we try masking any unadvertised points. + * So need to operate only with those returned from PCode. + */ + if (num_qgv_points > 0) + mask |= REG_GENMASK(num_qgv_points - 1, 0); + + if (num_psf_gv_points > 0) + mask |= REG_GENMASK(num_psf_gv_points - 1, 0) << ADLS_PSF_PT_SHIFT; + for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { unsigned int old_data_rate = @@ -663,23 +747,44 @@ int intel_bw_atomic_check(struct intel_atomic_state *state) max_bw = max_data_rate; } if (max_data_rate >= data_rate) - allowed_points |= BIT(i); + allowed_points |= REG_FIELD_PREP(ADLS_QGV_PT_MASK, BIT(i)); + drm_dbg_kms(&dev_priv->drm, "QGV point %d: max bw %d required %d\n", i, max_data_rate, data_rate); } + for (i = 0; i < num_psf_gv_points; i++) { + unsigned int max_data_rate = adl_psf_bw(dev_priv, i); + + if (max_data_rate >= data_rate) + allowed_points |= REG_FIELD_PREP(ADLS_PSF_PT_MASK, BIT(i)); + + drm_dbg_kms(&dev_priv->drm, "PSF GV point %d: max bw %d" + " required %d\n", + i, max_data_rate, data_rate); + } + /* * BSpec states that we always should have at least one allowed point * left, so if we couldn't - simply reject the configuration for obvious * reasons. */ - if (allowed_points == 0) { + if ((allowed_points & ADLS_QGV_PT_MASK) == 0) { drm_dbg_kms(&dev_priv->drm, "No QGV points provide sufficient memory" " bandwidth %d for display configuration(%d active planes).\n", data_rate, num_active_planes); return -EINVAL; } + if (num_psf_gv_points > 0) { + if ((allowed_points & ADLS_PSF_PT_MASK) == 0) { + drm_dbg_kms(&dev_priv->drm, "No PSF GV points provide sufficient memory" + " bandwidth %d for display configuration(%d active planes).\n", + data_rate, num_active_planes); + return -EINVAL; + } + } + /* * Leave only single point with highest bandwidth, if * we can't enable SAGV due to the increased memory latency it may |