From: Lewis Huang Date: Tue, 27 Aug 2019 09:03:41 +0000 (+0800) Subject: drm/amd/display: fix i2c wtire mot incorrect issue X-Git-Tag: v5.5-rc1~128^2~26^2~189 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0594ffee9011e7e32b7ad92fe6d815e8727281f8;p=linux.git drm/amd/display: fix i2c wtire mot incorrect issue [Why] I2C write command always send mot = true will cause sink state incorrect. [How] 1. Remove default i2c write mot = true. 2. Deciding mot flag by is_end_of_payload flag. Signed-off-by: Lewis Huang Reviewed-by: Charlene Liu Acked-by: Leo Li Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c index e8f3ba9c5475..57fb0574f198 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c @@ -525,7 +525,7 @@ bool dal_ddc_service_query_ddc_data( if (write_size != 0) { payload.write = true; - payload.mot = true; + payload.mot = false; payload.length = write_size; payload.data = write_buf; @@ -594,7 +594,7 @@ bool dal_ddc_submit_aux_command(struct ddc_service *ddc, current_payload.i2c_over_aux = payload->i2c_over_aux; current_payload.length = is_end_of_payload ? payload->length - retrieved : DEFAULT_AUX_MAX_DATA_SIZE; - current_payload.mot = payload->mot ? payload->mot : !is_end_of_payload; + current_payload.mot = !is_end_of_payload; current_payload.reply = payload->reply; current_payload.write = payload->write;