diff options
-rw-r--r-- | drivers/gpu/drm/msm/Makefile | 3 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/dp/dp_audio.c | 101 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/dp/dp_utils.c | 73 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/dp/dp_utils.h | 22 |
4 files changed, 112 insertions, 87 deletions
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 543e04fa72e3..b21ae2880c71 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -127,7 +127,8 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \ dp/dp_drm.o \ dp/dp_link.o \ dp/dp_panel.o \ - dp/dp_audio.o + dp/dp_audio.o \ + dp/dp_utils.o msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c index 4a2e479723a8..7634e4b74208 100644 --- a/drivers/gpu/drm/msm/dp/dp_audio.c +++ b/drivers/gpu/drm/msm/dp/dp_audio.c @@ -15,13 +15,7 @@ #include "dp_audio.h" #include "dp_panel.h" #include "dp_display.h" - -#define HEADER_BYTE_2_BIT 0 -#define PARITY_BYTE_2_BIT 8 -#define HEADER_BYTE_1_BIT 16 -#define PARITY_BYTE_1_BIT 24 -#define HEADER_BYTE_3_BIT 16 -#define PARITY_BYTE_3_BIT 24 +#include "dp_utils.h" struct dp_audio_private { struct platform_device *audio_pdev; @@ -36,71 +30,6 @@ struct dp_audio_private { struct dp_audio dp_audio; }; -static u8 dp_audio_get_g0_value(u8 data) -{ - u8 c[4]; - u8 g[4]; - u8 ret_data = 0; - u8 i; - - for (i = 0; i < 4; i++) - c[i] = (data >> i) & 0x01; - - g[0] = c[3]; - g[1] = c[0] ^ c[3]; - g[2] = c[1]; - g[3] = c[2]; - - for (i = 0; i < 4; i++) - ret_data = ((g[i] & 0x01) << i) | ret_data; - - return ret_data; -} - -static u8 dp_audio_get_g1_value(u8 data) -{ - u8 c[4]; - u8 g[4]; - u8 ret_data = 0; - u8 i; - - for (i = 0; i < 4; i++) - c[i] = (data >> i) & 0x01; - - g[0] = c[0] ^ c[3]; - g[1] = c[0] ^ c[1] ^ c[3]; - g[2] = c[1] ^ c[2]; - g[3] = c[2] ^ c[3]; - - for (i = 0; i < 4; i++) - ret_data = ((g[i] & 0x01) << i) | ret_data; - - return ret_data; -} - -static u8 dp_audio_calculate_parity(u32 data) -{ - u8 x0 = 0; - u8 x1 = 0; - u8 ci = 0; - u8 iData = 0; - u8 i = 0; - u8 parity_byte; - u8 num_byte = (data & 0xFF00) > 0 ? 8 : 2; - - for (i = 0; i < num_byte; i++) { - iData = (data >> i*4) & 0xF; - - ci = iData ^ x1; - x1 = x0 ^ dp_audio_get_g1_value(ci); - x0 = dp_audio_get_g0_value(ci); - } - - parity_byte = x1 | (x0 << 4); - - return parity_byte; -} - static u32 dp_audio_get_header(struct dp_catalog *catalog, enum dp_catalog_audio_sdp_type sdp, enum dp_catalog_audio_header_type header) @@ -134,7 +63,7 @@ static void dp_audio_stream_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1); new_value = 0x02; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_1_BIT) | (parity_byte << PARITY_BYTE_1_BIT)); drm_dbg_dp(audio->drm_dev, @@ -147,7 +76,7 @@ static void dp_audio_stream_sdp(struct dp_audio_private *audio) value = dp_audio_get_header(catalog, DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2); new_value = value; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_2_BIT) | (parity_byte << PARITY_BYTE_2_BIT)); drm_dbg_dp(audio->drm_dev, @@ -162,7 +91,7 @@ static void dp_audio_stream_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3); new_value = audio->channels - 1; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_3_BIT) | (parity_byte << PARITY_BYTE_3_BIT)); drm_dbg_dp(audio->drm_dev, @@ -184,7 +113,7 @@ static void dp_audio_timestamp_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1); new_value = 0x1; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_1_BIT) | (parity_byte << PARITY_BYTE_1_BIT)); drm_dbg_dp(audio->drm_dev, @@ -198,7 +127,7 @@ static void dp_audio_timestamp_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2); new_value = 0x17; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_2_BIT) | (parity_byte << PARITY_BYTE_2_BIT)); drm_dbg_dp(audio->drm_dev, @@ -212,7 +141,7 @@ static void dp_audio_timestamp_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3); new_value = (0x0 | (0x11 << 2)); - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_3_BIT) | (parity_byte << PARITY_BYTE_3_BIT)); drm_dbg_dp(audio->drm_dev, @@ -233,7 +162,7 @@ static void dp_audio_infoframe_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1); new_value = 0x84; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_1_BIT) | (parity_byte << PARITY_BYTE_1_BIT)); drm_dbg_dp(audio->drm_dev, @@ -247,7 +176,7 @@ static void dp_audio_infoframe_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2); new_value = 0x1b; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_2_BIT) | (parity_byte << PARITY_BYTE_2_BIT)); drm_dbg_dp(audio->drm_dev, @@ -261,7 +190,7 @@ static void dp_audio_infoframe_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3); new_value = (0x0 | (0x11 << 2)); - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_3_BIT) | (parity_byte << PARITY_BYTE_3_BIT)); drm_dbg_dp(audio->drm_dev, @@ -282,7 +211,7 @@ static void dp_audio_copy_management_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1); new_value = 0x05; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_1_BIT) | (parity_byte << PARITY_BYTE_1_BIT)); drm_dbg_dp(audio->drm_dev, @@ -296,7 +225,7 @@ static void dp_audio_copy_management_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2); new_value = 0x0F; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_2_BIT) | (parity_byte << PARITY_BYTE_2_BIT)); drm_dbg_dp(audio->drm_dev, @@ -310,7 +239,7 @@ static void dp_audio_copy_management_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3); new_value = 0x0; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_3_BIT) | (parity_byte << PARITY_BYTE_3_BIT)); drm_dbg_dp(audio->drm_dev, @@ -331,7 +260,7 @@ static void dp_audio_isrc_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1); new_value = 0x06; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_1_BIT) | (parity_byte << PARITY_BYTE_1_BIT)); drm_dbg_dp(audio->drm_dev, @@ -345,7 +274,7 @@ static void dp_audio_isrc_sdp(struct dp_audio_private *audio) DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2); new_value = 0x0F; - parity_byte = dp_audio_calculate_parity(new_value); + parity_byte = dp_utils_calculate_parity(new_value); value |= ((new_value << HEADER_BYTE_2_BIT) | (parity_byte << PARITY_BYTE_2_BIT)); drm_dbg_dp(audio->drm_dev, diff --git a/drivers/gpu/drm/msm/dp/dp_utils.c b/drivers/gpu/drm/msm/dp/dp_utils.c new file mode 100644 index 000000000000..3a44fe738c00 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_utils.c @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2024, The Linux Foundation. All rights reserved. + */ + +#include <linux/types.h> + +#include "dp_utils.h" + +u8 dp_utils_get_g0_value(u8 data) +{ + u8 c[4]; + u8 g[4]; + u8 ret_data = 0; + u8 i; + + for (i = 0; i < 4; i++) + c[i] = (data >> i) & 0x01; + + g[0] = c[3]; + g[1] = c[0] ^ c[3]; + g[2] = c[1]; + g[3] = c[2]; + + for (i = 0; i < 4; i++) + ret_data = ((g[i] & 0x01) << i) | ret_data; + + return ret_data; +} + +u8 dp_utils_get_g1_value(u8 data) +{ + u8 c[4]; + u8 g[4]; + u8 ret_data = 0; + u8 i; + + for (i = 0; i < 4; i++) + c[i] = (data >> i) & 0x01; + + g[0] = c[0] ^ c[3]; + g[1] = c[0] ^ c[1] ^ c[3]; + g[2] = c[1] ^ c[2]; + g[3] = c[2] ^ c[3]; + + for (i = 0; i < 4; i++) + ret_data = ((g[i] & 0x01) << i) | ret_data; + + return ret_data; +} + +u8 dp_utils_calculate_parity(u32 data) +{ + u8 x0 = 0; + u8 x1 = 0; + u8 ci = 0; + u8 iData = 0; + u8 i = 0; + u8 parity_byte; + u8 num_byte = (data & 0xFF00) > 0 ? 8 : 2; + + for (i = 0; i < num_byte; i++) { + iData = (data >> i * 4) & 0xF; + + ci = iData ^ x1; + x1 = x0 ^ dp_utils_get_g1_value(ci); + x0 = dp_utils_get_g0_value(ci); + } + + parity_byte = x1 | (x0 << 4); + + return parity_byte; +} diff --git a/drivers/gpu/drm/msm/dp/dp_utils.h b/drivers/gpu/drm/msm/dp/dp_utils.h new file mode 100644 index 000000000000..5a505cbf3432 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_utils.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2024, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_UTILS_H_ +#define _DP_UTILS_H_ + +#define HEADER_BYTE_0_BIT 0 +#define PARITY_BYTE_0_BIT 8 +#define HEADER_BYTE_1_BIT 16 +#define PARITY_BYTE_1_BIT 24 +#define HEADER_BYTE_2_BIT 0 +#define PARITY_BYTE_2_BIT 8 +#define HEADER_BYTE_3_BIT 16 +#define PARITY_BYTE_3_BIT 24 + +u8 dp_utils_get_g0_value(u8 data); +u8 dp_utils_get_g1_value(u8 data); +u8 dp_utils_calculate_parity(u32 data); + +#endif /* _DP_UTILS_H_ */ |