[Intel-gfx] [PATCH v2 2/2] drm/i915: Render decompression support for Gen9 and above
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Apr 29 14:45:29 UTC 2016
On Fri, Apr 29, 2016 at 08:27:00PM +0530, Vandana Kannan wrote:
> This patch includes enabling render decompression (RC) after checking
> all the requirements (format, tiling, rotation etc.).
>
> TODO:
> 1. Disable stereo 3D when render decomp is enabled (bit 7:6)
> 2. Render decompression must not be used in VTd pass-through mode
> 3. Program hashing select CHICKEN_MISC1 bit 15
> 4. For Gen10, add support for RGB 1010102
> 5. RC-FBC workaround
> 6. RC watermark calculation
>
> The reason for using a plane property instead of fb modifier:-
> In Android, OGL passes a render compressed buffer to hardware composer
> (HWC), which would then request a flip on that buffer after checking if
> the target can support render compressed buffer. For example, only planes
> 1 and 2 on pipes 1 and 2 can support RC. In case the target cannot
> support it, HWC will revert back to OGL requesting for uncompressed
> buffer.
> Here,
> if plane property is used, OGL would send back the buffer (same ID) after
> decompression, marked uncompressed. If fb modifier was used, a different
> version of the buffer would have to be maintained for different
> combinations - in the simple case of render compressed vs uncompressed
> buffer, there would be 2 fbs with 2 IDs. So, in this case, OGL would give
> a reference to a fb with a different ID.
> To avoid the difficulty of keeping track of multiple fbs and the subsequent
> complexity in debug, the architecture forum decided to go ahead with a
> plane property for RC.
>
> [Mayuresh] Added the plane check in skl_check_compression()
>
> v2: Ville's review comments addressed
> - Removed WAs specific to SKL-C and BXT-A
> - Assign capabilities according to pipe and plane during property creation
> - in skl_check_compression(), check for conditions that must be satisifed
>
> Maintaining the check for pixel format, even though compressed fb of format
> other RGB8888 should not have been created, to be on the safer side.
> Added checks for BGR8888 too.
> Bitmask is being used for the property to accommodate 2 more options
> expected to be added in future.
>
> This patch depends on Ville's patch series on fb->offsets.
> (Ref: git://github.com/vsyrjala/linux.git fb_offsets_14)
>
> Testing is in progress for v2 of the patch.
>
> Signed-off-by: Vandana Kannan <vandana.kannan at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Smith, Gary K <gary.k.smith at intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_reg.h | 22 +++++
> drivers/gpu/drm/i915/intel_atomic_plane.c | 24 +++++-
> drivers/gpu/drm/i915/intel_display.c | 135 +++++++++++++++++++++++++++++-
> drivers/gpu/drm/i915/intel_drv.h | 10 +++
> drivers/gpu/drm/i915/intel_sprite.c | 27 +++++-
> 6 files changed, 213 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 32f0597..ba32e7c 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1901,6 +1901,7 @@ struct drm_i915_private {
>
> struct drm_property *broadcast_rgb_property;
> struct drm_property *force_audio_property;
> + struct drm_property *render_comp_property;
>
> /* hda/i915 audio component */
> struct i915_audio_component *audio_component;
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 25e229b..da45cc9 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5816,6 +5816,28 @@ enum skl_disp_power_wells {
> _ID(id, _PS_ECC_STAT_1A, _PS_ECC_STAT_2A), \
> _ID(id, _PS_ECC_STAT_1B, _PS_ECC_STAT_2B))
>
> +#define PLANE_AUX_DIST_1_A 0x701c0
> +#define PLANE_AUX_DIST_2_A 0x702c0
> +#define PLANE_AUX_DIST_1_B 0x711c0
> +#define PLANE_AUX_DIST_2_B 0x712c0
> +#define _PLANE_AUX_DIST_1(pipe) \
> + _PIPE(pipe, PLANE_AUX_DIST_1_A, PLANE_AUX_DIST_1_B)
> +#define _PLANE_AUX_DIST_2(pipe) \
> + _PIPE(pipe, PLANE_AUX_DIST_2_A, PLANE_AUX_DIST_2_B)
> +#define PLANE_AUX_DIST(pipe, plane) \
> + _MMIO_PLANE(plane, _PLANE_AUX_DIST_1(pipe), _PLANE_AUX_DIST_2(pipe))
> +
> +#define PLANE_AUX_OFFSET_1_A 0x701c4
> +#define PLANE_AUX_OFFSET_2_A 0x702c4
> +#define PLANE_AUX_OFFSET_1_B 0x711c4
> +#define PLANE_AUX_OFFSET_2_B 0x712c4
> +#define _PLANE_AUX_OFFSET_1(pipe) \
> + _PIPE(pipe, PLANE_AUX_OFFSET_1_A, PLANE_AUX_OFFSET_1_B)
> +#define _PLANE_AUX_OFFSET_2(pipe) \
> + _PIPE(pipe, PLANE_AUX_OFFSET_2_A, PLANE_AUX_OFFSET_2_B)
> +#define PLANE_AUX_OFFSET(pipe, plane) \
> + _MMIO_PLANE(plane, _PLANE_AUX_OFFSET_1(pipe), _PLANE_AUX_OFFSET_2(pipe))
> +
> /* legacy palette */
> #define _LGC_PALETTE_A 0x4a000
> #define _LGC_PALETTE_B 0x4a800
> diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
> index 7de7721..2617b75 100644
> --- a/drivers/gpu/drm/i915/intel_atomic_plane.c
> +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
> @@ -228,8 +228,16 @@ intel_plane_atomic_get_property(struct drm_plane *plane,
> struct drm_property *property,
> uint64_t *val)
> {
> - DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
> - return -EINVAL;
> + struct drm_i915_private *dev_priv = state->plane->dev->dev_private;
> + struct intel_plane_state *intel_state = to_intel_plane_state(state);
> +
> + if (property == dev_priv->render_comp_property) {
> + *val = intel_state->render_comp_enable;
> + } else {
> + DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
> + return -EINVAL;
> + }
> + return 0;
> }
>
> /**
> @@ -250,6 +258,14 @@ intel_plane_atomic_set_property(struct drm_plane *plane,
> struct drm_property *property,
> uint64_t val)
> {
> - DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
> - return -EINVAL;
> + struct drm_i915_private *dev_priv = state->plane->dev->dev_private;
> + struct intel_plane_state *intel_state = to_intel_plane_state(state);
> +
> + if (property == dev_priv->render_comp_property) {
> + intel_state->render_comp_enable = val;
> + } else {
> + DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
> + return -EINVAL;
> + }
> + return 0;
> }
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index bfcc2eb..9b2ff21 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -117,6 +117,9 @@ static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force);
> static void ironlake_pfit_enable(struct intel_crtc *crtc);
> static void intel_modeset_setup_hw_state(struct drm_device *dev);
> static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
> +static int skl_check_compression(struct drm_device *dev,
> + struct intel_plane_state *plane_state,
> + enum pipe pipe, int x, int y);
>
> typedef struct {
> int min, max;
> @@ -3045,7 +3048,7 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
> int pipe = intel_crtc->pipe;
> u32 plane_ctl, stride_div, stride;
> u32 tile_height, plane_offset, plane_size;
> - unsigned int rotation = plane_state->base.rotation;
> + unsigned int rotation = plane_state->base.rotation, render_comp;
> int x_offset, y_offset;
> u32 surf_addr;
> int scaler_id = plane_state->scaler_id;
> @@ -3057,6 +3060,9 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
> int dst_y = plane_state->dst.y1;
> int dst_w = drm_rect_width(&plane_state->dst);
> int dst_h = drm_rect_height(&plane_state->dst);
> + unsigned long aux_dist = 0;
> + u32 aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
> + u32 tile_row_adjustment = 0, height_in_mem = 0;
>
> plane_ctl = PLANE_CTL_ENABLE |
> PLANE_CTL_PIPE_GAMMA_ENABLE |
> @@ -3093,10 +3099,28 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
> intel_crtc->adjusted_x = x_offset;
> intel_crtc->adjusted_y = y_offset;
>
> + render_comp = plane_state->render_comp_enable;
> + if (render_comp) {
> + int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> +
> + tile_height = intel_tile_height(dev_priv, fb->modifier[0], cpp);
> +
> + height_in_mem = (fb->offsets[1]/fb->pitches[0]);
> + tile_row_adjustment = height_in_mem % tile_height;
> + aux_dist = (fb->pitches[0] *
> + (height_in_mem - tile_row_adjustment));
> + aux_stride = skl_plane_stride(fb, 1, rotation);
This stuff shouldn't be here if my stuff is used as a base. Like for
nv12, it should all be computed upfront.
I should probably go read up on render compression so I'd actually know
what the AUX offsets actually mean for it.
> + plane_ctl |= PLANE_CTL_DECOMPRESSION_ENABLE;
> + } else {
> + plane_ctl &= ~PLANE_CTL_DECOMPRESSION_ENABLE;
> + }
> +
> I915_WRITE(PLANE_CTL(pipe, 0), plane_ctl);
> I915_WRITE(PLANE_OFFSET(pipe, 0), plane_offset);
> I915_WRITE(PLANE_SIZE(pipe, 0), plane_size);
> I915_WRITE(PLANE_STRIDE(pipe, 0), stride);
> + I915_WRITE(PLANE_AUX_DIST(pipe, 0), aux_dist | aux_stride);
> + I915_WRITE(PLANE_AUX_OFFSET(pipe, 0), aux_y_offset<<16 | aux_x_offset);
>
> if (scaler_id >= 0) {
> uint32_t ps_ctrl = 0;
> @@ -11856,6 +11880,17 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
> return ret;
> }
>
> + if (fb && to_intel_plane_state(plane_state)->
> + render_comp_enable) {
> + ret = skl_check_compression(dev,
> + to_intel_plane_state(plane_state),
> + intel_crtc->pipe, crtc->x, crtc->y);
> + if (ret) {
> + DRM_DEBUG_KMS("Render compr checks failed\n");
> + return ret;
> + }
> + }
> +
> was_visible = old_plane_state->visible;
> visible = to_intel_plane_state(plane_state)->visible;
>
> @@ -13972,6 +14007,63 @@ skl_max_scale(struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state
> return max_scale;
> }
>
> +static int skl_check_compression(struct drm_device *dev,
> + struct intel_plane_state *plane_state,
> + enum pipe pipe, int x, int y)
> +{
> + struct drm_framebuffer *fb = plane_state->base.fb;
> + int x_offset;
> + int src_w = drm_rect_width(&plane_state->src) >> 16;
> +
> + if (!IS_SKYLAKE(dev) && !IS_BROXTON(dev)) {
> + DRM_DEBUG_KMS("RC support on CNL+ needs to be revisited\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * TODO:
> + * 1. Disable stereo 3D when render decomp is enabled (bit 7:6)
> + * 2. Render decompression must not be used in VTd pass-through mode
> + * 3. Program hashing select CHICKEN_MISC1 bit 15
> + */
> +
> + if (plane_state->base.rotation &
> + ~(BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_180))) {
> + DRM_DEBUG_KMS("RC support only with 0/180 degree rotation\n");
> + return -EINVAL;
> + }
> +
> + if ((fb->modifier[0] != I915_FORMAT_MOD_Y_TILED) &&
> + (fb->modifier[0] != I915_FORMAT_MOD_Yf_TILED)) {
> + DRM_DEBUG_KMS("RC supported only with Y-tile\n");
> + return -EINVAL;
> + }
> +
> + if ((fb->pixel_format != DRM_FORMAT_XBGR8888) &&
> + (fb->pixel_format != DRM_FORMAT_ABGR8888) &&
> + (fb->pixel_format != DRM_FORMAT_XRGB8888) &&
> + (fb->pixel_format != DRM_FORMAT_ARGB8888)) {
> + DRM_DEBUG_KMS("RC supported only with RGB8888 formats\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * For SKL & BXT,
> + * When the render compression is enabled with plane
> + * width greater than 3840 and horizontal panning,
> + * the stride programmed in the PLANE_STRIDE register
> + * must be multiple of 4.
> + */
> + x_offset = x;
> +
> + if (src_w > 3840 && x_offset != 0) {
> + DRM_DEBUG_KMS("RC: width > 3840, horizontal panning\n");
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> static int
> intel_check_primary_plane(struct drm_plane *plane,
> struct intel_crtc_state *crtc_state,
> @@ -14126,6 +14218,9 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> if (INTEL_INFO(dev)->gen >= 4)
> intel_create_rotation_property(dev, primary);
>
> + if (INTEL_INFO(dev)->gen >= 9)
> + intel_create_render_comp_property(dev, primary);
> +
> drm_plane_helper_add(&primary->base, &intel_plane_helper_funcs);
>
> return &primary->base;
> @@ -14155,6 +14250,44 @@ void intel_create_rotation_property(struct drm_device *dev, struct intel_plane *
> plane->base.state->rotation);
> }
>
> +void intel_create_render_comp_property(struct drm_device *dev,
> + struct intel_plane *plane)
> +{
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct drm_plane *drm_plane = &plane->base;
> + unsigned long flags = BIT(COMP_UNCOMPRESSED);
> +
> + static const struct drm_prop_enum_list rc_status[] = {
> + { COMP_UNCOMPRESSED, "Uncompressed/not capable" },
> + { COMP_RENDER, "Only render decompression" },
> + };
> +
> + if (plane->pipe != PIPE_C ||
> + (drm_plane->type == DRM_PLANE_TYPE_PRIMARY ||
> + (drm_plane->type == DRM_PLANE_TYPE_OVERLAY &&
> + plane->plane == PLANE_A))) {
> + flags |= BIT(COMP_RENDER);
> + }
> +
> + if (!dev_priv->render_comp_property) {
> + dev_priv->render_comp_property =
> + drm_property_create_bitmask(dev, 0,
> + "render compression",
> + rc_status, ARRAY_SIZE(rc_status),
> + flags);
> + if (!dev_priv->render_comp_property) {
> + DRM_ERROR("RC: Failed to create property\n");
> + return;
> + }
> + }
> +
> + if (dev_priv->render_comp_property) {
> + drm_object_attach_property(&plane->base.base,
> + dev_priv->render_comp_property, 0);
> + }
> + dev->mode_config.allow_aux_plane = true;
> +}
> +
> static int
> intel_check_cursor_plane(struct drm_plane *plane,
> struct intel_crtc_state *crtc_state,
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index cf27989..38006e7 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -303,6 +303,10 @@ struct intel_atomic_state {
> bool skip_intermediate_wm;
> };
>
> +/* render compression property bits */
> +#define COMP_UNCOMPRESSED 0
> +#define COMP_RENDER 1
> +
> struct intel_plane_state {
> struct drm_plane_state base;
> struct drm_rect src;
> @@ -334,6 +338,9 @@ struct intel_plane_state {
>
> /* async flip related structures */
> struct drm_i915_gem_request *wait_req;
> +
> + /* Render compression */
> + unsigned int render_comp_enable;
> };
>
> struct intel_initial_plane_config {
> @@ -1196,6 +1203,9 @@ intel_rotation_90_or_270(unsigned int rotation)
> void intel_create_rotation_property(struct drm_device *dev,
> struct intel_plane *plane);
>
> +void intel_create_render_comp_property(struct drm_device *dev,
> + struct intel_plane *plane);
> +
> void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
> enum pipe pipe);
>
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 0f3e230..2593bcf 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -193,7 +193,7 @@ skl_update_plane(struct drm_plane *drm_plane,
> const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> u32 surf_addr;
> u32 tile_height, plane_offset, plane_size;
> - unsigned int rotation = plane_state->base.rotation;
> + unsigned int rotation = plane_state->base.rotation, render_comp;
> int x_offset, y_offset;
> int crtc_x = plane_state->dst.x1;
> int crtc_y = plane_state->dst.y1;
> @@ -205,6 +205,9 @@ skl_update_plane(struct drm_plane *drm_plane,
> uint32_t src_h = drm_rect_height(&plane_state->src) >> 16;
> const struct intel_scaler *scaler =
> &crtc_state->scaler_state.scalers[plane_state->scaler_id];
> + unsigned long aux_dist = 0;
> + u32 aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
> + u32 tile_row_adjustment = 0, height_in_mem = 0;
>
> plane_ctl = PLANE_CTL_ENABLE |
> PLANE_CTL_PIPE_GAMMA_ENABLE |
> @@ -254,9 +257,28 @@ skl_update_plane(struct drm_plane *drm_plane,
> }
> plane_offset = y_offset << 16 | x_offset;
>
> + render_comp = plane_state->render_comp_enable;
> + if (render_comp) {
> + int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> +
> + tile_height = intel_tile_height(dev_priv, fb->modifier[0], cpp);
> +
> + height_in_mem = (fb->offsets[1]/fb->pitches[0]);
> + tile_row_adjustment = height_in_mem % tile_height;
> + aux_dist = (fb->pitches[0] *
> + (height_in_mem - tile_row_adjustment));
> + aux_stride = skl_plane_stride(fb, 1, rotation);
> + plane_ctl |= PLANE_CTL_DECOMPRESSION_ENABLE;
> + } else {
> + plane_ctl &= ~PLANE_CTL_DECOMPRESSION_ENABLE;
> + }
> +
> I915_WRITE(PLANE_OFFSET(pipe, plane), plane_offset);
> I915_WRITE(PLANE_STRIDE(pipe, plane), stride);
> I915_WRITE(PLANE_SIZE(pipe, plane), plane_size);
> + I915_WRITE(PLANE_AUX_DIST(pipe, plane), aux_dist | aux_stride);
> + I915_WRITE(PLANE_AUX_OFFSET(pipe, plane),
> + aux_y_offset<<16 | aux_x_offset);
>
> /* program plane scaler */
> if (plane_state->scaler_id >= 0) {
> @@ -1120,6 +1142,9 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
>
> intel_create_rotation_property(dev, intel_plane);
>
> + if (INTEL_INFO(dev)->gen >= 9)
> + intel_create_render_comp_property(dev, intel_plane);
> +
> drm_plane_helper_add(&intel_plane->base, &intel_plane_helper_funcs);
>
> return 0;
> --
> 1.9.1
--
Ville Syrjälä
Intel OTC
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