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drm/msm/dpu: Fix pixel extension sub-sampling

In _dpu_plane_setup_pixel_ext function instead of dividing just chroma
source resolution once (component 1 and 2), second component is divided
once more because src_w and src_h variable is reused between iterations.
Third component receives wrong source resolution too (from component 2).
To fix this introduce temporary variables for each iteration.

Fixes: dabfdd89eaa9 ("drm/msm/disp/dpu1: add inline rotation support for sc7280")
Signed-off-by: Vladimir Lypak <vladimir.lypak@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/681921/
Link: https://lore.kernel.org/r/20251017-b4-dpu-fixes-v1-4-40ce5993eeb6@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

authored by

Vladimir Lypak and committed by
Dmitry Baryshkov 2f8bed91 425da330

+6 -4
+6 -4
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
··· 500 500 int i; 501 501 502 502 for (i = 0; i < DPU_MAX_PLANES; i++) { 503 + uint32_t w = src_w, h = src_h; 504 + 503 505 if (i == DPU_SSPP_COMP_1_2 || i == DPU_SSPP_COMP_2) { 504 - src_w /= chroma_subsmpl_h; 505 - src_h /= chroma_subsmpl_v; 506 + w /= chroma_subsmpl_h; 507 + h /= chroma_subsmpl_v; 506 508 } 507 509 508 - pixel_ext->num_ext_pxls_top[i] = src_h; 509 - pixel_ext->num_ext_pxls_left[i] = src_w; 510 + pixel_ext->num_ext_pxls_top[i] = h; 511 + pixel_ext->num_ext_pxls_left[i] = w; 510 512 } 511 513 } 512 514