drm/vkms: Fix RGB565 pixel conversion
Currently, the pixel conversion isn't rounding the fixed-point values before assigning it to the RGB coefficients, which is causing the IGT pixel-format tests to fail. So, use the drm_fixp2int_round() fixed-point helper to round the values when assigning it to the RGB coefficients. Tested with igt@kms_plane@pixel-format and igt@kms_plane@pixel-format-source-clamping. [v2]: * Use drm_fixp2int_round() to fix the pixel conversion instead of casting the values to s32 (Melissa Wen). Fixes: 89b03aea ("drm/vkms: fix 32bit compilation error by replacing macros") Signed-off-by: Maíra Canal <mcanal@igalia.com> Reviewed-by: Arthur Grillo <arthurgrillo@riseup.net> Signed-off-by: Maíra Canal <mairacanal@riseup.net> Link: https://patchwork.freedesktop.org/patch/msgid/20230512104044.65034-2-mcanal@igalia.com
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