From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c | 83 ++++++++---------------------------------
1 files changed, 16 insertions(+), 67 deletions(-)
diff --git a/kernel/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c b/kernel/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
index 813ba42..751985a 100644
--- a/kernel/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
+++ b/kernel/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
@@ -1,21 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* HDMI TI81xx, TI38xx, TI OMAP4 etc IP driver Library
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
* Authors: Yong Zhi
* Mythri pk <mythripk@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define DSS_SUBSYS_NAME "HDMICORE"
@@ -43,7 +32,7 @@
return core->base + HDMI_CORE_AV;
}
-static int hdmi_core_ddc_init(struct hdmi_core_data *core)
+int hdmi4_core_ddc_init(struct hdmi_core_data *core)
{
void __iomem *base = core->base;
@@ -85,13 +74,11 @@
return 0;
}
-static int hdmi_core_ddc_edid(struct hdmi_core_data *core,
- u8 *pedid, int ext)
+int hdmi4_core_ddc_read(void *data, u8 *buf, unsigned int block, size_t len)
{
+ struct hdmi_core_data *core = data;
void __iomem *base = core->base;
u32 i;
- char checksum;
- u32 offset = 0;
/* HDMI_CORE_DDC_STATUS_IN_PROG */
if (hdmi_wait_for_bit_change(base, HDMI_CORE_DDC_STATUS,
@@ -100,24 +87,21 @@
return -ETIMEDOUT;
}
- if (ext % 2 != 0)
- offset = 0x80;
-
/* Load Segment Address Register */
- REG_FLD_MOD(base, HDMI_CORE_DDC_SEGM, ext / 2, 7, 0);
+ REG_FLD_MOD(base, HDMI_CORE_DDC_SEGM, block / 2, 7, 0);
/* Load Slave Address Register */
REG_FLD_MOD(base, HDMI_CORE_DDC_ADDR, 0xA0 >> 1, 7, 1);
/* Load Offset Address Register */
- REG_FLD_MOD(base, HDMI_CORE_DDC_OFFSET, offset, 7, 0);
+ REG_FLD_MOD(base, HDMI_CORE_DDC_OFFSET, block % 2 ? 0x80 : 0, 7, 0);
/* Load Byte Count */
- REG_FLD_MOD(base, HDMI_CORE_DDC_COUNT1, 0x80, 7, 0);
+ REG_FLD_MOD(base, HDMI_CORE_DDC_COUNT1, len, 7, 0);
REG_FLD_MOD(base, HDMI_CORE_DDC_COUNT2, 0x0, 1, 0);
/* Set DDC_CMD */
- if (ext)
+ if (block)
REG_FLD_MOD(base, HDMI_CORE_DDC_CMD, 0x4, 3, 0);
else
REG_FLD_MOD(base, HDMI_CORE_DDC_CMD, 0x2, 3, 0);
@@ -133,7 +117,7 @@
return -EIO;
}
- for (i = 0; i < 0x80; ++i) {
+ for (i = 0; i < len; ++i) {
int t;
/* IN_PROG */
@@ -152,46 +136,10 @@
udelay(1);
}
- pedid[i] = REG_GET(base, HDMI_CORE_DDC_DATA, 7, 0);
- }
-
- checksum = 0;
- for (i = 0; i < 0x80; ++i)
- checksum += pedid[i];
-
- if (checksum != 0) {
- DSSERR("E-EDID checksum failed!!\n");
- return -EIO;
+ buf[i] = REG_GET(base, HDMI_CORE_DDC_DATA, 7, 0);
}
return 0;
-}
-
-int hdmi4_read_edid(struct hdmi_core_data *core, u8 *edid, int len)
-{
- int r, l;
-
- if (len < 128)
- return -EINVAL;
-
- r = hdmi_core_ddc_init(core);
- if (r)
- return r;
-
- r = hdmi_core_ddc_edid(core, edid, 0);
- if (r)
- return r;
-
- l = 128;
-
- if (len >= 128 * 2 && edid[0x7e] > 0) {
- r = hdmi_core_ddc_edid(core, edid + 0x80, 1);
- if (r)
- return r;
- l += 128;
- }
-
- return l;
}
static void hdmi_core_init(struct hdmi_core_video_config *video_cfg)
@@ -553,8 +501,9 @@
}
/* Set ACR clock divisor */
- REG_FLD_MOD(av_base,
- HDMI_CORE_AV_FREQ_SVAL, cfg->mclk_mode, 2, 0);
+ if (cfg->use_mclk)
+ REG_FLD_MOD(av_base, HDMI_CORE_AV_FREQ_SVAL,
+ cfg->mclk_mode, 2, 0);
r = hdmi_read_reg(av_base, HDMI_CORE_AV_ACR_CTRL);
/*
@@ -686,7 +635,7 @@
struct hdmi_audio_format audio_format;
struct hdmi_audio_dma audio_dma;
struct hdmi_core_audio_config acore;
- int err, n, cts, channel_count;
+ int n, cts, channel_count;
unsigned int fs_nr;
bool word_length_16b = false;
@@ -708,7 +657,7 @@
else
acore.i2s_cfg.justification = HDMI_AUDIO_JUSTIFY_RIGHT;
/*
- * The I2S input word length is twice the lenght given in the IEC-60958
+ * The I2S input word length is twice the length given in the IEC-60958
* status word. If the word size is greater than
* 20 bits, increment by one.
*/
@@ -748,7 +697,7 @@
return -EINVAL;
}
- err = hdmi_compute_acr(pclk, fs_nr, &n, &cts);
+ hdmi_compute_acr(pclk, fs_nr, &n, &cts);
/* Audio clock regeneration settings */
acore.n = n;
--
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