Re: [PATCH 4/5] drm: ssd130x: Reduce temporary buffer sizes

On Tue, Mar 15, 2022 at 12:07:06PM +0100, Geert Uytterhoeven wrote:

ssd130x_clear_screen() allocates a temporary buffer sized to hold one byte per pixel, while it only needs to hold one bit per pixel.

ssd130x_fb_blit_rect() allocates a temporary buffer sized to hold one byte per pixel for the whole frame buffer, while it only needs to hold one bit per pixel for the part that is to be updated. Pass dst_pitch to drm_fb_xrgb8888_to_mono_reversed(), as we have already calculated it anyway.

Can we use bitmap API? bitmap_zalloc() / etc ?