Hi Sam Am 03.08.21 um 18:21 schrieb Sam Ravnborg:
Hi Thomas, On Tue, Aug 03, 2021 at 02:59:17PM +0200, Thomas Zimmermann wrote:A framebuffer's offsets field might be non-zero to make the BO data start at the specified offset within the BO's memory. Handle this case in drm_gem_fb_vmap() and update all callers. So far, many drivers ignore the offsets, which can lead to visual artifacts. Patch 1 adds an optional argument to drm_gem_fb_vmap() to return the offset-adjusted data address for use with shadow-buffered planes. Patches 3 and 11 convert gud and vkms, which are the other callers of drm_gem_fb_vmap(). For gud, it's just a cleanup. Vkms will handle the framebuffer offsets correctly for its input and output framebuffers. The other patches convert users of shadow-buffered planes to use the data address. After conversion, each driver will use the correct data for non-zero offsets.drm/ast: Use offset-adjusted shadow-plane mappings drm/gud: Get offset-adjusted mapping from drm_gem_fb_vmap() drm/hyperv: Use offset-adjusted shadow-plane mappings drm/mgag200: Use offset-adjusted shadow-plane mappings drm/cirrus: Use offset-adjusted shadow-plane mappings drm/gm12u320: Use offset-adjusted shadow-plane mappings drm/simpledrm: Use offset-adjusted shadow-plane mapping drm/udl: Use offset-adjusted shadow-plane mapping drm/vbox: Use offset-adjusted shadow-plane mappings drm/vkms: Use offset-adjusted shadow-plane mappings and outputEverything looked good while reading through the patches. I cannot say if everything was properly converted but the patches looked good. So they are all: Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Thanks!
There was a few TODO comments visible aboput using the mapping api properly. I assume this is coming in a later patch set..
There are indeed quite a few such comments. When we introduced the dma_buf_map type to solve the fbdev issue on sparc64, in many places I simply put the existing vaddr pointers into the map structure, and vice versa.
The code works as expected, but in the future we may want to use dma_buf_map for all framebuffer pointers. This would, for example, require format conversion helpers that operate on these structures. Adding that will require a number of changes throughout these helpers.
Best regards Thomas
Sam
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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