drm/i915: Write AVI infoframes for MCA LSPCON
LSPCON is a DP branch device, so LSPCON vendors define
specific methods to pass AVI infoframes to the the chip.
This patch adds:
- a generic wrapper function for writing AVI infoframes for
all LSPCON devices.
- a vendor specific function to wrire AVI infoframes into
MCA LSPCON devices.
V2: Rebase
V3: Added r-b from Maarten
V4: Rebase
V5: Rebase
V6: Rebase
V7: Fixed checkpatch warnings for alignment
V8: Rebase
V9: Added the retry logic, with 50ms incremental delays while
writing AVI IF
V10: Changed the return value check
V11: Fixed checkpatch warning
V12: Rebase
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-6-git-send-email-shashank.sharma@intel.com
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8c402d0..b8e5f95 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2215,6 +2215,10 @@ void intel_color_load_luts(struct drm_crtc_state *crtc_state);
bool lspcon_init(struct intel_digital_port *intel_dig_port);
void lspcon_resume(struct intel_lspcon *lspcon);
void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon);
+void lspcon_write_infoframe(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state,
+ unsigned int type,
+ const void *buf, ssize_t len);
void lspcon_set_infoframes(struct intel_encoder *encoder,
bool enable,
const struct intel_crtc_state *crtc_state,