Commit dbe9e61b authored by Shashank Sharma's avatar Shashank Sharma Committed by Jani Nikula

drm/i915: Add lspcon support for I915 driver

This patch adds a new file, to accommodate lspcon support
for I915 driver. These functions probe, detect, initialize
and configure an on-board lspcon device during the driver
init time.

Also, this patch adds a small structure for lspcon device,
which will provide the runtime status of the device.

V2: addressed ville's review comments
- Clean the leftover macros from previous patch set

V3: Rebase
V4: addressed ville's review comments
- make internal functions static
- remove lspcon_detect_identifier, make it inline with lspcon_probe
- remove is_lspcon_active function
- remove force check while setting a lspcon mode

V5: Rebase
V6: Pass dev_priv to IS_GEN9 check
Signed-off-by: default avatarShashank Sharma <shashank.sharma@intel.com>
Signed-off-by: default avatarAkashdeep Sharma <akashdeep.sharma@intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-3-git-send-email-shashank.sharma@intel.com
parent 056996b9
...@@ -101,6 +101,7 @@ i915-y += dvo_ch7017.o \ ...@@ -101,6 +101,7 @@ i915-y += dvo_ch7017.o \
intel_dvo.o \ intel_dvo.o \
intel_hdmi.o \ intel_hdmi.o \
intel_i2c.o \ intel_i2c.o \
intel_lspcon.o \
intel_lvds.o \ intel_lvds.o \
intel_panel.o \ intel_panel.o \
intel_sdvo.o \ intel_sdvo.o \
......
...@@ -961,12 +961,19 @@ struct intel_dp { ...@@ -961,12 +961,19 @@ struct intel_dp {
bool compliance_test_active; bool compliance_test_active;
}; };
struct intel_lspcon {
bool active;
enum drm_lspcon_mode mode;
struct drm_dp_aux *aux;
};
struct intel_digital_port { struct intel_digital_port {
struct intel_encoder base; struct intel_encoder base;
enum port port; enum port port;
u32 saved_port_bits; u32 saved_port_bits;
struct intel_dp dp; struct intel_dp dp;
struct intel_hdmi hdmi; struct intel_hdmi hdmi;
struct intel_lspcon lspcon;
enum irqreturn (*hpd_pulse)(struct intel_digital_port *, bool); enum irqreturn (*hpd_pulse)(struct intel_digital_port *, bool);
bool release_cl2_override; bool release_cl2_override;
uint8_t max_lanes; uint8_t max_lanes;
...@@ -1848,4 +1855,6 @@ int intel_color_check(struct drm_crtc *crtc, struct drm_crtc_state *state); ...@@ -1848,4 +1855,6 @@ int intel_color_check(struct drm_crtc *crtc, struct drm_crtc_state *state);
void intel_color_set_csc(struct drm_crtc_state *crtc_state); void intel_color_set_csc(struct drm_crtc_state *crtc_state);
void intel_color_load_luts(struct drm_crtc_state *crtc_state); void intel_color_load_luts(struct drm_crtc_state *crtc_state);
/* intel_lspcon.c */
bool lspcon_init(struct intel_digital_port *intel_dig_port);
#endif /* __INTEL_DRV_H__ */ #endif /* __INTEL_DRV_H__ */
/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*
*/
#include <drm/drm_edid.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_dual_mode_helper.h>
#include "intel_drv.h"
enum drm_lspcon_mode lspcon_get_current_mode(struct intel_lspcon *lspcon)
{
enum drm_lspcon_mode current_mode = DRM_LSPCON_MODE_INVALID;
struct i2c_adapter *adapter = &lspcon->aux->ddc;
if (drm_lspcon_get_mode(adapter, &current_mode))
DRM_ERROR("Error reading LSPCON mode\n");
else
DRM_DEBUG_KMS("Current LSPCON mode %s\n",
current_mode == DRM_LSPCON_MODE_PCON ? "PCON" : "LS");
return current_mode;
}
static int lspcon_change_mode(struct intel_lspcon *lspcon,
enum drm_lspcon_mode mode, bool force)
{
int err;
enum drm_lspcon_mode current_mode;
struct i2c_adapter *adapter = &lspcon->aux->ddc;
err = drm_lspcon_get_mode(adapter, &current_mode);
if (err) {
DRM_ERROR("Error reading LSPCON mode\n");
return err;
}
if (current_mode == mode) {
DRM_DEBUG_KMS("Current mode = desired LSPCON mode\n");
return 0;
}
err = drm_lspcon_set_mode(adapter, mode);
if (err < 0) {
DRM_ERROR("LSPCON mode change failed\n");
return err;
}
lspcon->mode = mode;
DRM_DEBUG_KMS("LSPCON mode changed done\n");
return 0;
}
static bool lspcon_probe(struct intel_lspcon *lspcon)
{
enum drm_dp_dual_mode_type adaptor_type;
struct i2c_adapter *adapter = &lspcon->aux->ddc;
/* Lets probe the adaptor and check its type */
adaptor_type = drm_dp_dual_mode_detect(adapter);
if (adaptor_type != DRM_DP_DUAL_MODE_LSPCON) {
DRM_DEBUG_KMS("No LSPCON detected, found %s\n",
drm_dp_get_dual_mode_type_name(adaptor_type));
return false;
}
/* Yay ... got a LSPCON device */
DRM_DEBUG_KMS("LSPCON detected\n");
lspcon->mode = lspcon_get_current_mode(lspcon);
lspcon->active = true;
return true;
}
bool lspcon_init(struct intel_digital_port *intel_dig_port)
{
struct intel_dp *dp = &intel_dig_port->dp;
struct intel_lspcon *lspcon = &intel_dig_port->lspcon;
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
if (!IS_GEN9(dev_priv)) {
DRM_ERROR("LSPCON is supported on GEN9 only\n");
return false;
}
lspcon->active = false;
lspcon->mode = DRM_LSPCON_MODE_INVALID;
lspcon->aux = &dp->aux;
if (!lspcon_probe(lspcon)) {
DRM_ERROR("Failed to probe lspcon\n");
return false;
}
/*
* In the SW state machine, lets Put LSPCON in PCON mode only.
* In this way, it will work with both HDMI 1.4 sinks as well as HDMI
* 2.0 sinks.
*/
if (lspcon->active && lspcon->mode != DRM_LSPCON_MODE_PCON) {
if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON,
true) < 0) {
DRM_ERROR("LSPCON mode change to PCON failed\n");
return false;
}
}
DRM_DEBUG_KMS("Success: LSPCON init\n");
return true;
}
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