linux-kernel - [PATCH v3,3/3] drm/mediatek: dp: Add the audio divider to mtk_dp

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Message-ID: <20230720082604.18618-4-shuijing.li@mediatek.com>
Date:   Thu, 20 Jul 2023 16:26:04 +0800
From:   Shuijing Li <shuijing.li@...iatek.com>
To:     <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>,
        <airlied@...il.com>, <daniel@...ll.ch>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <matthias.bgg@...il.com>,
        <angelogioacchino.delregno@...labora.com>, <jitao.shi@...iatek.com>
CC:     <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Shuijing Li <shuijing.li@...iatek.com>
Subject: [PATCH v3,3/3] drm/mediatek: dp: Add the audio divider to mtk_dp_data struct

Due to the difference of HW, different dividers need to be set.

Signed-off-by: Shuijing Li <shuijing.li@...iatek.com>
Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
---
Changes in v3:
Separate these two things into two different patches.
per suggestion from the previous thread:
https://lore.kernel.org/lkml/e2ad22bcba31797f38a12a488d4246a01bf0cb2e.camel@mediatek.com/
Changes in v2:
- change the variables' name to be more descriptive
- add a comment that describes the function of mtk_dp_audio_sample_arrange
- reduce indentation by doing the inverse check
- add a definition of some bits
- add support for mediatek, mt8188-edp-tx
per suggestion from the previous thread:
https://lore.kernel.org/lkml/ac0fcec9-a2fe-06cc-c727-189ef7babe9c@collabora.com/
---
 drivers/gpu/drm/mediatek/mtk_dp.c     | 7 ++++++-
 drivers/gpu/drm/mediatek/mtk_dp_reg.h | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index d8cda83d6fef..8e1a13ab2ba2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -140,6 +140,7 @@ struct mtk_dp_data {
 	const struct mtk_dp_efuse_fmt *efuse_fmt;
 	bool audio_supported;
 	bool audio_pkt_in_hblank_area;
+	u16 audio_m_div2_bit;
 };
 
 static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
@@ -648,7 +649,7 @@ static void mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp,
 static void mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp)
 {
 	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC,
-			   AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
+			   mtk_dp->data->audio_m_div2_bit,
 			   AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK);
 }
 
@@ -2636,6 +2637,7 @@ static const struct mtk_dp_data mt8188_edp_data = {
 	.efuse_fmt = mt8195_edp_efuse_fmt,
 	.audio_supported = false,
 	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct mtk_dp_data mt8188_dp_data = {
@@ -2644,6 +2646,7 @@ static const struct mtk_dp_data mt8188_dp_data = {
 	.efuse_fmt = mt8195_dp_efuse_fmt,
 	.audio_supported = true,
 	.audio_pkt_in_hblank_area = true,
+	.audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct mtk_dp_data mt8195_edp_data = {
@@ -2652,6 +2655,7 @@ static const struct mtk_dp_data mt8195_edp_data = {
 	.efuse_fmt = mt8195_edp_efuse_fmt,
 	.audio_supported = false,
 	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct mtk_dp_data mt8195_dp_data = {
@@ -2660,6 +2664,7 @@ static const struct mtk_dp_data mt8195_dp_data = {
 	.efuse_fmt = mt8195_dp_efuse_fmt,
 	.audio_supported = true,
 	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct of_device_id mtk_dp_of_match[] = {
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
index f38d6ff12afe..6d7f0405867e 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp_reg.h
+++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
@@ -162,6 +162,7 @@
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_2	(1 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_4	(2 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_8	(3 << 8)
+#define MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2	(4 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2	(5 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_4	(6 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_8	(7 << 8)
-- 
2.40.1