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author | Chandan Uddaraju <chandanu@codeaurora.org> | 2020-08-28 00:16:55 +0300 |
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committer | Rob Clark <robdclark@chromium.org> | 2020-09-15 20:54:34 +0300 |
commit | c943b4948b5848fc0e07f875edbd35a973879e22 (patch) | |
tree | bd5c293057f2da48823bac8fb6466c120da5091f /drivers/gpu/drm/msm/dp/dp_hpd.c | |
parent | b22960b8f274382ff165db50faebbde5f8a16c32 (diff) | |
download | linux-c943b4948b5848fc0e07f875edbd35a973879e22.tar.xz |
drm/msm/dp: add displayPort driver support
Add the needed displayPort files to enable DP driver
on msm target.
"dp_display" module is the main module that calls into
other sub-modules. "dp_drm" file represents the interface
between DRM framework and DP driver.
Changes in v12:
-- Add support of pm ops in display port driver
-- Clear bpp depth bits before writing to MISC register
-- Fix edid read
Previous Change log:
https://lkml.kernel.org/lkml/20200818051137.21478-3-tanmay@codeaurora.org/
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: Vara Reddy <varar@codeaurora.org>
Signed-off-by: Tanmay Shah <tanmay@codeaurora.org>
Co-developed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Co-developed-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Co-developed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Co-developed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_hpd.c')
-rw-r--r-- | drivers/gpu/drm/msm/dp/dp_hpd.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_hpd.c b/drivers/gpu/drm/msm/dp/dp_hpd.c new file mode 100644 index 000000000000..5b08ce580702 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hpd.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/slab.h> +#include <linux/device.h> + +#include "dp_hpd.h" + +/* DP specific VDM commands */ +#define DP_USBPD_VDM_STATUS 0x10 +#define DP_USBPD_VDM_CONFIGURE 0x11 + +/* USBPD-TypeC specific Macros */ +#define VDM_VERSION 0x0 +#define USB_C_DP_SID 0xFF01 + +struct dp_hpd_private { + struct device *dev; + struct dp_usbpd_cb *dp_cb; + struct dp_usbpd dp_usbpd; +}; + +static int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd) +{ + int rc = 0; + struct dp_hpd_private *hpd_priv; + + hpd_priv = container_of(dp_usbpd, struct dp_hpd_private, + dp_usbpd); + + dp_usbpd->hpd_high = hpd; + + if (!hpd_priv->dp_cb && !hpd_priv->dp_cb->configure + && !hpd_priv->dp_cb->disconnect) { + pr_err("hpd dp_cb not initialized\n"); + return -EINVAL; + } + if (hpd) + hpd_priv->dp_cb->configure(hpd_priv->dev); + else + hpd_priv->dp_cb->disconnect(hpd_priv->dev); + + return rc; +} + +struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb) +{ + struct dp_hpd_private *dp_hpd; + + if (!cb) { + pr_err("invalid cb data\n"); + return ERR_PTR(-EINVAL); + } + + dp_hpd = devm_kzalloc(dev, sizeof(*dp_hpd), GFP_KERNEL); + if (!dp_hpd) + return ERR_PTR(-ENOMEM); + + dp_hpd->dev = dev; + dp_hpd->dp_cb = cb; + + dp_hpd->dp_usbpd.connect = dp_hpd_connect; + + return &dp_hpd->dp_usbpd; +} |