On Wed, Feb 25, 2015 at 04:47:23PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
>
> Display watermarks need different programming for different tiling
> modes.
>
> Set the relevant flag so this happens during the plane commit and
> add relevant data into a structure made available to the watermark
> computation code.
>
> v2: Pass in tiling info to sprite plane updates as well.
> v3: Rebased for plane handling changes.
> v4: Handle fb == NULL when plane is disabled.
> v5: Refactored for addfb2 interface.
> v6: Refactored for fb modifier changes.
> v7: Updated for atomic commit by only updating watermarks when tiling changes.
> v8: BSpec watermark calculation updates.
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> Acked-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
> Acked-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_display.c | 6 ++++
> drivers/gpu/drm/i915/intel_drv.h | 1 +
> drivers/gpu/drm/i915/intel_pm.c | 56 ++++++++++++++++++++++++++++++------
> drivers/gpu/drm/i915/intel_sprite.c | 6 ++++
> 4 files changed, 60 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 626e6538..1d50934 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11994,6 +11994,12 @@ intel_check_primary_plane(struct drm_plane *plane,
> INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe);
>
> intel_crtc->atomic.update_fbc = true;
> +
> + /* Update watermarks on tiling changes. */
> + if (!plane->state->fb || !state->base.fb ||
> + plane->state->fb->modifier[0] !=
> + state->base.fb->modifier[0])
> + intel_crtc->atomic.update_wm = true;
> }
>
> return 0;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 399d2b2..b124548 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -501,6 +501,7 @@ struct intel_plane_wm_parameters {
> uint8_t bytes_per_pixel;
> bool enabled;
> bool scaled;
> + u64 tiling;
> };
>
> struct intel_plane {
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 626c3c2..e0d6ebc 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2603,7 +2603,7 @@ static uint32_t skl_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
>
> static uint32_t skl_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
> uint32_t horiz_pixels, uint8_t bytes_per_pixel,
> - uint32_t latency)
> + uint64_t tiling, uint32_t latency)
> {
Hum, does this compile? I'm seeing an extra argument to skl_wm_method2()
but no update at the calling site?
> uint32_t ret;
> uint32_t plane_bytes_per_line, plane_blocks_per_line;
> @@ -2613,7 +2613,16 @@ static uint32_t skl_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
> return UINT_MAX;
>
> plane_bytes_per_line = horiz_pixels * bytes_per_pixel;
> - plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
> +
> + if (tiling == I915_FORMAT_MOD_Y_TILED ||
> + tiling == I915_FORMAT_MOD_Yf_TILED) {
> + plane_bytes_per_line *= 4;
> + plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
> + plane_blocks_per_line /= 4;
> + } else {
> + plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
> + }
> +
> wm_intermediate_val = latency * pixel_rate;
> ret = DIV_ROUND_UP(wm_intermediate_val, pipe_htotal * 1000) *
> plane_blocks_per_line;
> @@ -2665,6 +2674,7 @@ static void skl_compute_wm_pipe_parameters(struct drm_crtc *crtc,
> struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> enum pipe pipe = intel_crtc->pipe;
> struct drm_plane *plane;
> + struct drm_framebuffer *fb;
> int i = 1; /* Index for sprite planes start */
>
> p->active = intel_crtc_active(crtc);
> @@ -2680,6 +2690,14 @@ static void skl_compute_wm_pipe_parameters(struct drm_crtc *crtc,
> crtc->primary->fb->bits_per_pixel / 8;
> p->plane[0].horiz_pixels = intel_crtc->config->pipe_src_w;
> p->plane[0].vert_pixels = intel_crtc->config->pipe_src_h;
> + p->plane[0].tiling = DRM_FORMAT_MOD_NONE;
> + fb = crtc->primary->fb;
> + /*
> + * Framebuffer can be NULL on plane disable, but it does not
> + * matter for watermarks if we assume no tiling in that case.
> + */
> + if (fb)
> + p->plane[0].tiling = fb->modifier[0];
>
> p->cursor.enabled = true;
> p->cursor.bytes_per_pixel = 4;
> @@ -2709,6 +2727,7 @@ static bool skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
> uint32_t plane_bytes_per_line, plane_blocks_per_line;
> uint32_t res_blocks, res_lines;
> uint32_t result_blocks;
> + uint32_t y_tile_minimum;
The scope of the y_tile_minimum variable could be restricted further,
but well...
> if (latency == 0 || !p->active || !p_params->enabled)
> return false;
> @@ -2720,23 +2739,34 @@ static bool skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
> p->pipe_htotal,
> p_params->horiz_pixels,
> p_params->bytes_per_pixel,
> + p_params->tiling,
> latency);
>
> plane_bytes_per_line = p_params->horiz_pixels *
> p_params->bytes_per_pixel;
> plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
>
> - /* For now xtile and linear */
> - if ((ddb_allocation / plane_blocks_per_line) >= 1)
> - result_blocks = min(method1, method2);
> - else
> - result_blocks = method1;
> + if (p_params->tiling == I915_FORMAT_MOD_Y_TILED ||
> + p_params->tiling == I915_FORMAT_MOD_Yf_TILED) {
> + y_tile_minimum = plane_blocks_per_line * 4;
> + result_blocks = max(method2, y_tile_minimum);
> + } else {
> + if ((ddb_allocation / plane_blocks_per_line) >= 1)
> + result_blocks = min(method1, method2);
> + else
> + result_blocks = method1;
> + }
>
> res_blocks = result_blocks + 1;
> res_lines = DIV_ROUND_UP(result_blocks, plane_blocks_per_line);
>
> - if (level >=1 && level <= 7)
> - res_blocks++;
> + if (level >=1 && level <= 7) {
> + if (p_params->tiling == I915_FORMAT_MOD_Y_TILED ||
> + p_params->tiling == I915_FORMAT_MOD_Yf_TILED)
> + res_lines += 4;
> + else
> + res_blocks++;
> + }
>
> if (res_blocks > ddb_allocation || res_lines > 31)
> return false;
> @@ -3165,12 +3195,20 @@ skl_update_sprite_wm(struct drm_plane *plane, struct drm_crtc *crtc,
> int pixel_size, bool enabled, bool scaled)
> {
> struct intel_plane *intel_plane = to_intel_plane(plane);
> + struct drm_framebuffer *fb = plane->fb;
>
> intel_plane->wm.enabled = enabled;
> intel_plane->wm.scaled = scaled;
> intel_plane->wm.horiz_pixels = sprite_width;
> intel_plane->wm.vert_pixels = sprite_height;
> intel_plane->wm.bytes_per_pixel = pixel_size;
> + intel_plane->wm.tiling = DRM_FORMAT_MOD_NONE;
> + /*
> + * Framebuffer can be NULL on plane disable, but it does not
> + * matter for watermarks if we assume no tiling in that case.
> + */
> + if (fb)
> + intel_plane->wm.tiling = fb->modifier[0];
>
> skl_update_wm(crtc);
> }
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index b7103bd..29ec206 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1256,6 +1256,12 @@ finish:
>
> if (!intel_crtc->primary_enabled && !state->hides_primary)
> intel_crtc->atomic.post_enable_primary = true;
> +
> + /* Update watermarks on tiling changes. */
> + if (!plane->state->fb || !state->base.fb ||
> + plane->state->fb->modifier[0] !=
> + state->base.fb->modifier[0])
> + intel_crtc->atomic.update_wm = true;
> }
>
> return 0;
> --
> 2.3.0
>
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