mirror of https://gitee.com/openkylin/linux.git
drm/amd/display: Added negative check for vertical line start.
In case of vstartup happens before vsync, set vertical line start to 0. Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Harry Wentland <Harry.Wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -118,7 +118,7 @@ static void tgn10_program_timing(
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uint32_t start_point = 0;
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uint32_t field_num = 0;
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uint32_t h_div_2;
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uint32_t vertial_line_start;
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int32_t vertical_line_start;
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struct dcn10_timing_generator *tgn10 = DCN10TG_FROM_TG(tg);
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@ -216,9 +216,13 @@ static void tgn10_program_timing(
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/* Use OTG_VERTICAL_INTERRUPT2 replace VUPDATE interrupt,
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* program the reg for interrupt postition.
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*/
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vertial_line_start = asic_blank_end - tg->dlg_otg_param.vstartup_start + 1;
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vertical_line_start = asic_blank_end - tg->dlg_otg_param.vstartup_start + 1;
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if (vertical_line_start < 0) {
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ASSERT(0);
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vertical_line_start = 0;
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}
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REG_SET(OTG_VERTICAL_INTERRUPT2_POSITION, 0,
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OTG_VERTICAL_INTERRUPT2_LINE_START, vertial_line_start);
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OTG_VERTICAL_INTERRUPT2_LINE_START, vertical_line_start);
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/* v_sync polarity */
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v_sync_polarity = patched_crtc_timing.flags.VSYNC_POSITIVE_POLARITY ?
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