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When widebus was enabled for DisplayPort in commitc7c4122026("drm/msm/dp: enable widebus on all relevant chipsets") it was clarified that it is only supported on DPU 5.0.0 onwards which includes SC7180 on DPU revision 6.2. However, this patch missed that the description structure for SC7180 is also reused for SDM845 (because of identical io_start address) which is only DPU 4.0.0, leading to a wrongly enbled widebus feature and corruption on that platform. Create a separate msm_dp_desc_sdm845 structure for this SoC compatible, with the wide_bus_supported flag turned off. Fixes:c7c4122026("drm/msm/dp: enable widebus on all relevant chipsets") Signed-off-by: James A. MacInnes <james.a.macinnes@gmail.com> [DB: reworded commit text following Marijn's suggestion] Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Patchwork: https://patchwork.freedesktop.org/patch/636944/ Link: https://lore.kernel.org/r/20250212-sdm845_dp-v2-1-4954e51458f4@gmail.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>