Implemented Infoframes enabled readback for LSPCON devices.
This will help align the implementation with state readback
infrastructure.
v2: Added proper bitmask of enabled infoframes as per Ville's
recommendation.
v3: Added pcon specific infoframe types instead of using the HSW
one's, as recommended by Ville.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_lspcon.c | 57 ++++++++++++++++++++-
drivers/gpu/drm/i915/i915_reg.h | 2 +
2 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 7ae01f2a8596..70f4ae6bbda9 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -572,11 +572,64 @@ void lspcon_set_infoframes(struct intel_encoder *encoder,
buf, ret);
}
+static bool _lspcon_read_avi_infoframe_enabled_mca(struct drm_dp_aux *aux)
+{
+ int ret;
+ u32 val = 0;
+ u16 reg = LSPCON_MCA_AVI_IF_CTRL;
+
+ ret = drm_dp_dpcd_read(aux, reg, &val, 1);
+ if (ret < 0) {
+ DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
+ return false;
+ }
+
+ return val & LSPCON_MCA_AVI_IF_KICKOFF;
+}
+
+static bool _lspcon_read_avi_infoframe_enabled_parade(struct drm_dp_aux *aux)
+{
+ int ret;
+ u32 val = 0;
+ u16 reg = LSPCON_PARADE_AVI_IF_CTRL;
+
+ ret = drm_dp_dpcd_read(aux, reg, &val, 1);
+ if (ret < 0) {
+ DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
+ return false;
+ }
+
+ return val & LSPCON_PARADE_AVI_IF_KICKOFF;
+}
+
u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config)
{
- /* FIXME actually read this from the hw */
- return 0;
+ struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+ struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ bool infoframes_enabled;
+ u32 val = 0;
+ u32 mask, tmp;
+
+ if (lspcon->vendor == LSPCON_VENDOR_MCA)
+ infoframes_enabled = _lspcon_read_avi_infoframe_enabled_mca(&intel_dp->aux);
+ else
+ infoframes_enabled = _lspcon_read_avi_infoframe_enabled_parade(&intel_dp->aux);
+
+ if (infoframes_enabled)
+ val |= VIDEO_DIP_ENABLE_AVI_PCON;
+
+ if (lspcon->hdr_supported) {
+ tmp = intel_de_read(dev_priv,
+ HSW_TVIDEO_DIP_CTL(pipe_config->cpu_transcoder));
+ mask = VIDEO_DIP_ENABLE_GMP_PCON;
+
+ if (tmp & mask)
+ val |= mask;
+ }
+
+ return val;
}
void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 88c215cf97d4..8e2e2f7007d0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4977,6 +4977,8 @@ enum {
#define VIDEO_DIP_ENABLE_VS_HSW (1 << 8)
#define VIDEO_DIP_ENABLE_GMP_HSW (1 << 4)
#define VIDEO_DIP_ENABLE_SPD_HSW (1 << 0)
+#define VIDEO_DIP_ENABLE_AVI_PCON (1 << 12)
+#define VIDEO_DIP_ENABLE_GMP_PCON (1 << 4)
/* Panel power sequencing */
#define PPS_BASE 0x61200
--
2.26.2
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