[PATCH 2/3] drm/i915/dp: Add Read/Write support for Adaptive Sync SDP
Mitul Golani
mitulkumar.ajitkumar.golani at intel.com
Tue Nov 28 16:14:31 UTC 2023
Add the necessary structures and functions to handle reading and
unpacking Adaptive Sync Secondary Data Packets. Also add support
to write and pack AS SDP.
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani at intel.com>
---
.../drm/i915/display/intel_display_types.h | 1 +
drivers/gpu/drm/i915/display/intel_dp.c | 101 +++++++++++++++++-
drivers/gpu/drm/i915/display/intel_hdmi.c | 12 ++-
drivers/gpu/drm/i915/i915_reg.h | 6 ++
include/drm/display/drm_dp.h | 1 +
include/drm/display/drm_dp_helper.h | 3 +
6 files changed, 121 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index b3e942f2eeb0..a027bbe0bfa1 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1331,6 +1331,7 @@ struct intel_crtc_state {
union hdmi_infoframe hdmi;
union hdmi_infoframe drm;
struct drm_dp_vsc_sdp vsc;
+ struct drm_dp_as_sdp as_sdp;
} infoframes;
u8 eld[MAX_ELD_BYTES];
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index c6e3fe8b75d3..1fa9e974eb9c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -94,7 +94,6 @@
#define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
#define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
-
/* Constants for DP DSC configurations */
static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};
@@ -4106,6 +4105,42 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
return false;
}
+static ssize_t intel_dp_as_sdp_pack(const struct drm_dp_as_sdp *as_sdp,
+ struct dp_sdp *sdp, size_t size)
+{
+ size_t length = sizeof(struct dp_sdp);
+
+ if (size < length)
+ return -ENOSPC;
+
+ memset(sdp, 0, size);
+
+ /* Prepare AS (Adaptive Sync) VSC Header */
+ sdp->sdp_header.HB0 = 0;
+ sdp->sdp_header.HB1 = as_sdp->sdp_type;
+ sdp->sdp_header.HB2 = 0x02;
+ sdp->sdp_header.HB3 = as_sdp->length;
+
+ /* Fill AS (Adaptive Sync) SDP Payload */
+ if ((sdp->db[0] & 0x03) == 0) {
+ sdp->db[3] = 0;
+ sdp->db[4] &= 0xFC;
+ }
+
+ sdp->db[1] = as_sdp->vmin & 0xFF;
+ sdp->db[2] = (as_sdp->vmin >> 8) & 0xF;
+ sdp->db[17] = (as_sdp->vmin >> 8) & 0xFF;
+ sdp->db[18] = as_sdp->vmax & 0xFF;
+ sdp->db[19] = (as_sdp->vmax >> 8) & 0xFF;
+ sdp->db[20] = as_sdp->target_rr & 0xFF;
+ sdp->db[21] = (as_sdp->target_rr >> 8) & 0xFF;
+ sdp->db[22] = as_sdp->duration_incr_ms;
+ sdp->db[23] = as_sdp->duration_decr_ms;
+ sdp->db[24] = as_sdp->operation_mode;
+
+ return length;
+}
+
static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
struct dp_sdp *sdp, size_t size)
{
@@ -4273,6 +4308,10 @@ static void intel_write_dp_sdp(struct intel_encoder *encoder,
&crtc_state->infoframes.drm.drm,
&sdp, sizeof(sdp));
break;
+ case DP_SDP_ADAPTIVE_SYNC:
+ len = intel_dp_as_sdp_pack(&crtc_state->infoframes.as_sdp, &sdp,
+ sizeof(sdp));
+ break;
default:
MISSING_CASE(type);
return;
@@ -4335,6 +4374,41 @@ void intel_dp_set_infoframes(struct intel_encoder *encoder,
intel_write_dp_sdp(encoder, crtc_state, HDMI_PACKET_TYPE_GAMUT_METADATA);
}
+static
+int intel_dp_as_sdp_unpack(struct drm_dp_as_sdp *as_sdp,
+ const void *buffer, size_t size)
+{
+ const struct dp_sdp *sdp = buffer;
+
+ if (size < sizeof(struct dp_sdp))
+ return -EINVAL;
+
+ memset(as_sdp, 0, sizeof(*as_sdp));
+
+ if (sdp->sdp_header.HB0 != 0)
+ return -EINVAL;
+
+ if (sdp->sdp_header.HB1 != DP_SDP_ADAPTIVE_SYNC)
+ return -EINVAL;
+
+ if (sdp->sdp_header.HB2 != 0x02)
+ return -EINVAL;
+
+ if ((sdp->sdp_header.HB3 & 0x3F) != 9)
+ return -EINVAL;
+
+ if (sdp->db[0] != (AS_SDP_ENABLE | AS_SDP_OP_MODE))
+ return -EINVAL;
+
+ as_sdp->vmin = ((u64)sdp->db[2] << 32) | (u64)sdp->db[1];
+ as_sdp->vmax = 0;
+ as_sdp->target_rr = 0;
+ as_sdp->duration_incr_ms = 0;
+ as_sdp->duration_decr_ms = 0;
+
+ return 0;
+}
+
static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
const void *buffer, size_t size)
{
@@ -4405,6 +4479,27 @@ static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
return 0;
}
+static int
+intel_read_dp_metadata_infoframe_as_sdp(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state,
+ struct drm_dp_as_sdp *as_sdp)
+{
+ struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ unsigned int type = DP_SDP_ADAPTIVE_SYNC;
+ struct dp_sdp sdp = {};
+ int ret;
+
+ dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
+ sizeof(sdp));
+
+ ret = intel_dp_as_sdp_unpack(as_sdp, &sdp, sizeof(sdp));
+ if (ret)
+ drm_dbg_kms(&dev_priv->drm, "Failed to unpack DP AS SDP\n");
+
+ return ret;
+}
+
static int
intel_dp_hdr_metadata_infoframe_sdp_unpack(struct hdmi_drm_infoframe *drm_infoframe,
const void *buffer, size_t size)
@@ -4515,6 +4610,10 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
intel_read_dp_hdr_metadata_infoframe_sdp(encoder, crtc_state,
&crtc_state->infoframes.drm.drm);
break;
+ case DP_SDP_ADAPTIVE_SYNC:
+ intel_read_dp_metadata_infoframe_as_sdp(encoder, crtc_state,
+ &crtc_state->infoframes.as_sdp);
+ break;
default:
MISSING_CASE(type);
break;
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index ab18cfc19c0a..04c8d3de2258 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -136,6 +136,8 @@ static u32 hsw_infoframe_enable(unsigned int type)
return VIDEO_DIP_ENABLE_GMP_HSW;
case DP_SDP_VSC:
return VIDEO_DIP_ENABLE_VSC_HSW;
+ case DP_SDP_ADAPTIVE_SYNC:
+ return VIDEO_DIP_ENABLE_AS_HSW;
case DP_SDP_PPS:
return VDIP_ENABLE_PPS;
case HDMI_INFOFRAME_TYPE_AVI:
@@ -163,6 +165,8 @@ hsw_dip_data_reg(struct drm_i915_private *dev_priv,
return HSW_TVIDEO_DIP_GMP_DATA(cpu_transcoder, i);
case DP_SDP_VSC:
return HSW_TVIDEO_DIP_VSC_DATA(cpu_transcoder, i);
+ case DP_SDP_ADAPTIVE_SYNC:
+ return HSW_TVIDEO_DIP_AS_SDP_DATA(cpu_transcoder, i);
case DP_SDP_PPS:
return ICL_VIDEO_DIP_PPS_DATA(cpu_transcoder, i);
case HDMI_INFOFRAME_TYPE_AVI:
@@ -185,6 +189,8 @@ static int hsw_dip_data_size(struct drm_i915_private *dev_priv,
switch (type) {
case DP_SDP_VSC:
return VIDEO_DIP_VSC_DATA_SIZE;
+ case DP_SDP_ADAPTIVE_SYNC:
+ return VIDEO_DIP_ASYNC_DATA_SIZE;
case DP_SDP_PPS:
return VIDEO_DIP_PPS_DATA_SIZE;
case HDMI_PACKET_TYPE_GAMUT_METADATA:
@@ -555,7 +561,8 @@ static u32 hsw_infoframes_enabled(struct intel_encoder *encoder,
mask = (VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
- VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW);
+ VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
+ VIDEO_DIP_ENABLE_AS_HSW);
if (DISPLAY_VER(dev_priv) >= 10)
mask |= VIDEO_DIP_ENABLE_DRM_GLK;
@@ -567,6 +574,7 @@ static const u8 infoframe_type_to_idx[] = {
HDMI_PACKET_TYPE_GENERAL_CONTROL,
HDMI_PACKET_TYPE_GAMUT_METADATA,
DP_SDP_VSC,
+ DP_SDP_ADAPTIVE_SYNC,
HDMI_INFOFRAME_TYPE_AVI,
HDMI_INFOFRAME_TYPE_SPD,
HDMI_INFOFRAME_TYPE_VENDOR,
@@ -1209,7 +1217,7 @@ static void hsw_set_infoframes(struct intel_encoder *encoder,
val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
- VIDEO_DIP_ENABLE_DRM_GLK);
+ VIDEO_DIP_ENABLE_DRM_GLK | VIDEO_DIP_ENABLE_AS_HSW);
if (!enable) {
intel_de_write(dev_priv, reg, val);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 27dc903f0553..faacb5ac0afe 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2312,6 +2312,7 @@
* (Haswell and newer) to see which VIDEO_DIP_DATA byte corresponds to each byte
* of the infoframe structure specified by CEA-861. */
#define VIDEO_DIP_DATA_SIZE 32
+#define VIDEO_DIP_ASYNC_DATA_SIZE 32
#define VIDEO_DIP_GMP_DATA_SIZE 36
#define VIDEO_DIP_VSC_DATA_SIZE 36
#define VIDEO_DIP_PPS_DATA_SIZE 132
@@ -2344,6 +2345,7 @@
#define VSC_DIP_HW_DATA_SW_HEA (2 << 25)
#define VSC_DIP_SW_HEA_DATA (3 << 25)
#define VDIP_ENABLE_PPS (1 << 24)
+#define VIDEO_DIP_ENABLE_AS_HSW REG_BIT(23)
#define VIDEO_DIP_ENABLE_VSC_HSW (1 << 20)
#define VIDEO_DIP_ENABLE_GCP_HSW (1 << 16)
#define VIDEO_DIP_ENABLE_AVI_HSW (1 << 12)
@@ -5038,6 +5040,7 @@
#define _HSW_VIDEO_DIP_SPD_DATA_A 0x602A0
#define _HSW_VIDEO_DIP_GMP_DATA_A 0x602E0
#define _HSW_VIDEO_DIP_VSC_DATA_A 0x60320
+#define _HSW_VIDEO_DIP_ASYNC_DATA_A 0x60484
#define _GLK_VIDEO_DIP_DRM_DATA_A 0x60440
#define _HSW_VIDEO_DIP_AVI_ECC_A 0x60240
#define _HSW_VIDEO_DIP_VS_ECC_A 0x60280
@@ -5052,6 +5055,7 @@
#define _HSW_VIDEO_DIP_SPD_DATA_B 0x612A0
#define _HSW_VIDEO_DIP_GMP_DATA_B 0x612E0
#define _HSW_VIDEO_DIP_VSC_DATA_B 0x61320
+#define _HSW_VIDEO_DIP_ASYNC_DATA_B 0x61484
#define _GLK_VIDEO_DIP_DRM_DATA_B 0x61440
#define _HSW_VIDEO_DIP_BVI_ECC_B 0x61240
#define _HSW_VIDEO_DIP_VS_ECC_B 0x61280
@@ -5078,6 +5082,8 @@
#define HSW_TVIDEO_DIP_SPD_DATA(trans, i) _MMIO_TRANS2(trans, _HSW_VIDEO_DIP_SPD_DATA_A + (i) * 4)
#define HSW_TVIDEO_DIP_GMP_DATA(trans, i) _MMIO_TRANS2(trans, _HSW_VIDEO_DIP_GMP_DATA_A + (i) * 4)
#define HSW_TVIDEO_DIP_VSC_DATA(trans, i) _MMIO_TRANS2(trans, _HSW_VIDEO_DIP_VSC_DATA_A + (i) * 4)
+#define HSW_TVIDEO_DIP_AS_SDP_DATA(trans, i) _MMIO_TRANS2(trans,\
+ _HSW_VIDEO_DIP_ASYNC_DATA_A + (i) * 4)
#define GLK_TVIDEO_DIP_DRM_DATA(trans, i) _MMIO_TRANS2(trans, _GLK_VIDEO_DIP_DRM_DATA_A + (i) * 4)
#define ICL_VIDEO_DIP_PPS_DATA(trans, i) _MMIO_TRANS2(trans, _ICL_VIDEO_DIP_PPS_DATA_A + (i) * 4)
#define ICL_VIDEO_DIP_PPS_ECC(trans, i) _MMIO_TRANS2(trans, _ICL_VIDEO_DIP_PPS_ECC_A + (i) * 4)
diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h
index 19e9f274efbf..f410b23e0e14 100644
--- a/include/drm/display/drm_dp.h
+++ b/include/drm/display/drm_dp.h
@@ -1574,6 +1574,7 @@ enum drm_dp_phy {
#define DP_SDP_AUDIO_COPYMANAGEMENT 0x05 /* DP 1.2 */
#define DP_SDP_ISRC 0x06 /* DP 1.2 */
#define DP_SDP_VSC 0x07 /* DP 1.2 */
+#define DP_SDP_ADAPTIVE_SYNC 0x22 /* DP 1.4 */
#define DP_SDP_CAMERA_GENERIC(i) (0x08 + (i)) /* 0-7, DP 1.3 */
#define DP_SDP_PPS 0x10 /* DP 1.4 */
#define DP_SDP_VSC_EXT_VESA 0x20 /* DP 1.4 */
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index f5c34d4e350a..25b02254e9a4 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -838,6 +838,9 @@ int drm_dp_pcon_convert_rgb_to_ycbcr(struct drm_dp_aux *aux, u8 color_spc);
#define DRM_DP_BW_OVERHEAD_FEC BIT(3)
#define DRM_DP_BW_OVERHEAD_DSC BIT(4)
+#define AS_SDP_ENABLE BIT(2)
+#define AS_SDP_OP_MODE GENMASK(1, 0)
+
int drm_dp_bw_overhead(int lane_count, int hactive,
int dsc_slice_count,
int bpp_x16, unsigned long flags);
--
2.25.1
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