Hi, On Mon, Aug 26, 2019 at 04:35:10PM +0200, Stefan Agner wrote: > On 2019-08-26 14:05, Guido Günther wrote: > > Hi, > > On Wed, Aug 21, 2019 at 01:15:40PM +0300, Robert Chiras wrote: > >> This patch-set improves the use of eLCDIF block on iMX 8 SoCs (like 8MQ, 8MM > >> and 8QXP). Following, are the new features added and fixes from this > >> patch-set: > > > > I've applied this whole series on top of my NWL work and it looks good > > with a DSI panel. Applying the whole series also fixes an issue where > > after unblank the output was sometimes shifted about half a screen width > > to the right (which didn't happen with DCSS). So at least from the parts > > I could test: > > > > Tested-by: Guido Günther <agx@xxxxxxxxxxx> > > > > for the whole thing. > > Thanks for testing! What SoC did you use? I think it would be good to > also give this a try on i.MX 7 or i.MX 6ULL before merging. This was on i.MX8MQ. I don't have hardware to test mxsfb on anything else over here atm. Cheers, -- Guido > > -- > Stefan > > > > Cheers, > > -- Guido > >> > >> 1. Add support for drm_bridge > >> On 8MQ and 8MM, the LCDIF block is not directly connected to a parallel > >> display connector, where an LCD panel can be attached, but instead it is > >> connected to DSI controller. Since this DSI stands between the display > >> controller (eLCDIF) and the physical connector, the DSI can be implemented > >> as a DRM bridge. So, in order to be able to connect the mxsfb driver to > >> the DSI driver, the support for a drm_bridge was needed in mxsfb DRM > >> driver (the actual driver for the eLCDIF block). > >> > >> 2. Add support for additional pixel formats > >> Some of the pixel formats needed by Android were not implemented in this > >> driver, but they were actually supported. So, add support for them. > >> > >> 3. Add support for horizontal stride > >> Having support for horizontal stride allows the use of eLCDIF with a GPU > >> (for example) that can only output resolution sizes multiple of a power of > >> 8. For example, 1080 is not a power of 16, so in order to support 1920x1080 > >> output from GPUs that can produce linear buffers only in sizes multiple to 16, > >> this feature is needed. > >> > >> 3. Few minor features and bug-fixing > >> The addition of max-res DT property was actually needed in order to limit > >> the bandwidth usage of the eLCDIF block. This is need on systems where > >> multiple display controllers are presend and the memory bandwidth is not > >> enough to handle all of them at maximum capacity (like it is the case on > >> 8MQ, where there are two display controllers: DCSS and eLCDIF). > >> The rest of the patches are bug-fixes. > >> > >> v3: > >> - Removed the max-res property patches and added support for > >> max-memory-bandwidth property, as it is also implemented in other drivers > >> - Removed unnecessary drm_vblank_off in probe > >> > >> v2: > >> - Collected Tested-by from Guido > >> - Split the first patch, which added more than one feature into relevant > >> patches, explaining each feature added > >> - Also split the second patch into more patches, to differentiate between > >> the feature itself (additional pixel formats support) and the cleanup > >> of the register definitions for a better representation (guido) > >> - Included a patch submitted by Guido, while he was testing my patch-set > >> > >> Guido Günther (1): > >> drm/mxsfb: Read bus flags from bridge if present > >> > >> Mirela Rabulea (1): > >> drm/mxsfb: Signal mode changed when bpp changed > >> > >> Robert Chiras (13): > >> drm/mxsfb: Update mxsfb to support a bridge > >> drm/mxsfb: Add defines for the rest of registers > >> drm/mxsfb: Reset vital registers for a proper initialization > >> drm/mxsfb: Update register definitions using bit manipulation defines > >> drm/mxsfb: Update mxsfb with additional pixel formats > >> drm/mxsfb: Fix the vblank events > >> drm/mxsfb: Add max-memory-bandwidth property for MXSFB > >> dt-bindings: display: Add max-memory-bandwidth property for mxsfb > >> drm/mxsfb: Update mxsfb to support LCD reset > >> drm/mxsfb: Improve the axi clock usage > >> drm/mxsfb: Clear OUTSTANDING_REQS bits > >> drm/mxsfb: Add support for horizontal stride > >> drm/mxsfb: Add support for live pixel format change > >> > >> .../devicetree/bindings/display/mxsfb.txt | 5 + > >> drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 287 ++++++++++++++++++--- > >> drivers/gpu/drm/mxsfb/mxsfb_drv.c | 203 +++++++++++++-- > >> drivers/gpu/drm/mxsfb/mxsfb_drv.h | 12 +- > >> drivers/gpu/drm/mxsfb/mxsfb_out.c | 26 +- > >> drivers/gpu/drm/mxsfb/mxsfb_regs.h | 193 +++++++++----- > >> 6 files changed, 589 insertions(+), 137 deletions(-) > >> > >> -- > >> 2.7.4 > >> >
