On Tue, Oct 20, 2015 at 03:54:11PM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
>
> Previously rotation was ignored and wrong stride programmed
> into the plane registers resulting in a corrupt image on screen.
>
> v2: Do not access potentialy old plane state at flip time,
> but store the rotation value at the time of queing the flip.
> (Ville)
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
> Testcase: igt/kms_rotation_crc/primary-rotation-90-flip-stress (SKL)
> Cc: Sonika Jindal <sonika.jin...@intel.com>
> Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 30 +++++++++++++++++++-----------
> drivers/gpu/drm/i915/intel_drv.h | 1 +
> 2 files changed, 20 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 1fc1d240d3c1..9cb29086971a 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11091,13 +11091,14 @@ static bool use_mmio_flip(struct intel_engine_cs
> *ring,
> }
>
> static void skl_do_mmio_flip(struct intel_crtc *intel_crtc,
> + unsigned int rotation,
> struct intel_unpin_work *work)
> {
> struct drm_device *dev = intel_crtc->base.dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct drm_framebuffer *fb = intel_crtc->base.primary->fb;
> const enum pipe pipe = intel_crtc->pipe;
> - u32 ctl, stride;
> + u32 ctl, stride, tile_height;
>
> ctl = I915_READ(PLANE_CTL(pipe, 0));
> ctl &= ~PLANE_CTL_TILED_MASK;
> @@ -11121,9 +11122,16 @@ static void skl_do_mmio_flip(struct intel_crtc
> *intel_crtc,
> * The stride is either expressed as a multiple of 64 bytes chunks for
> * linear buffers or in number of tiles for tiled buffers.
> */
> - stride = fb->pitches[0] /
> - intel_fb_stride_alignment(dev, fb->modifier[0],
> - fb->pixel_format);
> + if (intel_rotation_90_or_270(rotation)) {
> + /* stride = Surface height in tiles */
> + tile_height = intel_tile_height(dev, fb->pixel_format,
> + fb->modifier[0], 0);
> + stride = DIV_ROUND_UP(fb->height, tile_height);
> + } else {
> + stride = fb->pitches[0] /
> + intel_fb_stride_alignment(dev, fb->modifier[0],
> + fb->pixel_format);
> + }
>
> /*
> * Both PLANE_CTL and PLANE_STRIDE are not updated on vblank but on
> @@ -11181,7 +11189,7 @@ static void intel_do_mmio_flip(struct intel_mmio_flip
> *mmio_flip)
> intel_pipe_update_start(crtc);
>
> if (INTEL_INFO(mmio_flip->i915)->gen >= 9)
> - skl_do_mmio_flip(crtc, work);
> + skl_do_mmio_flip(crtc, mmio_flip->rotation, work);
> else
> /* use_mmio_flip() retricts MMIO flips to ilk+ */
> ilk_do_mmio_flip(crtc, work);
> @@ -11208,10 +11216,8 @@ static void intel_mmio_flip_work_func(struct
> work_struct *work)
>
> static int intel_queue_mmio_flip(struct drm_device *dev,
> struct drm_crtc *crtc,
> - struct drm_framebuffer *fb,
> - struct drm_i915_gem_object *obj,
> - struct intel_engine_cs *ring,
> - uint32_t flags)
> + unsigned int rotation,
> + struct drm_i915_gem_object *obj)
> {
> struct intel_mmio_flip *mmio_flip;
>
> @@ -11222,6 +11228,7 @@ static int intel_queue_mmio_flip(struct drm_device
> *dev,
> mmio_flip->i915 = to_i915(dev);
> mmio_flip->req = i915_gem_request_reference(obj->last_write_req);
> mmio_flip->crtc = to_intel_crtc(crtc);
> + mmio_flip->rotation = rotation;
Could just do the crtc->primary->state->rotation thing here and avoid
having to pass the rotation from the caller.
But the patch looks OK anyway:
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> INIT_WORK(&mmio_flip->work, intel_mmio_flip_work_func);
> schedule_work(&mmio_flip->work);
> @@ -11438,8 +11445,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
> work->gtt_offset += intel_crtc->dspaddr_offset;
>
> if (mmio_flip) {
> - ret = intel_queue_mmio_flip(dev, crtc, fb, obj, ring,
> - page_flip_flags);
> + ret = intel_queue_mmio_flip(dev, crtc,
> + crtc->primary->state->rotation,
> + obj);
> if (ret)
> goto cleanup_unpin;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 27dccf35f9bc..140f949302c7 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -493,6 +493,7 @@ struct intel_mmio_flip {
> struct drm_i915_private *i915;
> struct drm_i915_gem_request *req;
> struct intel_crtc *crtc;
> + unsigned int rotation;
> };
>
> struct skl_pipe_wm {
> --
> 1.9.1
--
Ville Syrjälä
Intel OTC
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