f542d671ff
On HP 800 G4 DM, if HDMI cable isn't plugged before boot, the HDMI port becomes useless and never responds to cable hotplugging: [ 3.031904] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon [ 3.031945] [drm:intel_ddi_init [i915]] *ERROR* LSPCON init failed on port D Seems like the lspcon chip on the system only gets powered after the cable is plugged. Consilidate lspcon_init() into lspcon_resume() to dynamically init lspcon chip, and make HDMI port work. v6: - Rebase on latest for-linux-next. v5: - Consolidate lspcon_resume() with lspcon_init(). - Move more logic into lspcon code. v4: - Trust VBT in intel_infoframe_init(). - Init lspcon in intel_dp_detect(). v3: - Make sure it's handled under long HPD case. v2: - Move lspcon_init() inside of intel_dp_hpd_pulse(). Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/203 Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200610075542.12882-1-kai.heng.feng@canonical.com
38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_LSPCON_H__
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#define __INTEL_LSPCON_H__
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#include <linux/types.h>
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struct drm_connector;
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struct drm_connector_state;
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struct intel_crtc_state;
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struct intel_digital_port;
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struct intel_encoder;
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struct intel_lspcon;
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void lspcon_resume(struct intel_digital_port *dig_port);
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void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon);
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void lspcon_write_infoframe(struct intel_encoder *encoder,
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const struct intel_crtc_state *crtc_state,
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unsigned int type,
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const void *buf, ssize_t len);
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void lspcon_read_infoframe(struct intel_encoder *encoder,
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const struct intel_crtc_state *crtc_state,
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unsigned int type,
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void *frame, ssize_t len);
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void lspcon_set_infoframes(struct intel_encoder *encoder,
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bool enable,
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const struct intel_crtc_state *crtc_state,
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const struct drm_connector_state *conn_state);
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u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
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const struct intel_crtc_state *pipe_config);
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void lspcon_ycbcr420_config(struct drm_connector *connector,
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struct intel_crtc_state *crtc_state);
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#endif /* __INTEL_LSPCON_H__ */
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