From: Libin Yang libin.yang@intel.com
When modeset occurs and the TMDS frequency is set to some speical value, the N/CTS need to be set manually if audio is playing.
Signed-off-by: Libin Yang libin.yang@intel.com --- drivers/gpu/drm/i915/i915_reg.h | 6 ++++++ drivers/gpu/drm/i915/intel_audio.c | 42 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index da2d128..85f3beb 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7030,6 +7030,12 @@ enum skl_disp_power_wells { _HSW_AUD_DIG_CNVT_2) #define DIP_PORT_SEL_MASK 0x3
+#define _HSW_AUD_STR_DESC_1 0x65084 +#define _HSW_AUD_STR_DESC_2 0x65184 +#define AUD_STR_DESC(pipe) _PIPE(pipe, \ + _HSW_AUD_STR_DESC_1, \ + _HSW_AUD_STR_DESC_2) + #define _HSW_AUD_EDID_DATA_A 0x65050 #define _HSW_AUD_EDID_DATA_B 0x65150 #define HSW_AUD_EDID_DATA(pipe) _PIPE(pipe, \ diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index eddf37f..082f96d 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -235,6 +235,9 @@ static void hsw_audio_codec_enable(struct drm_connector *connector, const uint8_t *eld = connector->eld; uint32_t tmp; int len, i; + int cvt_idx; + int n_low, n_up, n; + int base_rate, mul, div, rate;
DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n", pipe_name(pipe), drm_eld_size(eld)); @@ -267,6 +270,21 @@ static void hsw_audio_codec_enable(struct drm_connector *connector, tmp |= AUDIO_ELD_VALID(pipe); I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
+ if ((mode->clock == 297000) || + (mode->clock == DIV_ROUND_UP(297000 * 1000, 1001))) { + tmp = I915_READ(HSW_AUD_PIPE_CONN_SEL_CTRL); + cvt_idx = (tmp >> pipe*8) & 0xff; + tmp = I915_READ(AUD_STR_DESC(cvt_idx)); + base_rate = tmp & (1 << 14); + if (base_rate == 0) + rate = 48000; + else + rate = 44100; + mul = (tmp & (0x7 << 11)) + 1; + div = (tmp & (0x7 << 8)) + 1; + rate = rate * mul / div; + } + /* Enable timestamps */ tmp = I915_READ(HSW_AUD_CFG(pipe)); tmp &= ~AUD_CONFIG_N_VALUE_INDEX; @@ -276,6 +294,30 @@ static void hsw_audio_codec_enable(struct drm_connector *connector, tmp |= AUD_CONFIG_N_VALUE_INDEX; else tmp |= audio_config_hdmi_pixel_clock(mode); + + if ((mode->clock != 297000) && + (mode->clock != DIV_ROUND_UP(297000 * 1000, 1001))) { + tmp &= ~AUD_CONFIG_N_PROG_ENABLE; + } else { + for (i = 0; i < ARRAY_SIZE(aud_ncts); i++) { + if ((rate == aud_ncts[i].sample_rate) && + (mode->clock == aud_ncts[i].clock)) { + n = aud_ncts[i].n; + break; + } + } + if (n != 0) { + tmp |= AUD_CONFIG_N_PROG_ENABLE; + n_low = n & 0xfff; + n_up = (n >> 12) & 0xff; + tmp |= AUD_CONFIG_N_PROG_ENABLE; + tmp &= ~AUD_CONFIG_UPPER_N_MASK; + tmp |= (n_up << AUD_CONFIG_UPPER_N_SHIFT); + tmp &= ~AUD_CONFIG_LOWER_N_MASK; + tmp |= (n_low << AUD_CONFIG_LOWER_N_SHIFT); + } + } + I915_WRITE(HSW_AUD_CFG(pipe), tmp); }