[PATCH v2 40/40] drm/i915/tgl: Gen-12 media compression

Lucas De Marchi
2019-08-17T09:40:16Z

From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>

Gen-12 display can decompress surfaces compressed by the media engine.
Detect the modifier corresponding to media compression to enable
decompression for YUV and ARGB packed formats. A new modifier is added
so that the driver can distinguish between media and render compressed
buffers. Unlike render decompression, plane 6 and plane 7 do not support
media decompression.

v2: Fix checkpatch warnings on code style (Lucas)

Bspec: 29695

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 23 +++++++++++++++++---
drivers/gpu/drm/i915/display/intel_sprite.c | 20 +++++++++++++----
drivers/gpu/drm/i915/i915_reg.h | 1 +
3 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 190adbffe055..18ff4631f873 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1913,6 +1913,7 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
return 128;
/* fall through */
case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
if (color_plane == 1)
return cpp;
/* fall through */
@@ -2050,6 +2051,7 @@ static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
return 256 * 1024;
return 0;
case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
return 4 * 4 * 1024;
case I915_FORMAT_MOD_Y_TILED_CCS:
case I915_FORMAT_MOD_Yf_TILED_CCS:
@@ -2248,8 +2250,15 @@ static u32 intel_adjust_tile_offset(int *x, int *y,

static bool is_surface_linear(u64 modifier, int color_plane)
{
- return modifier == DRM_FORMAT_MOD_LINEAR ||
- (modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS && color_plane == 1);
+ switch (modifier) {
+ case DRM_FORMAT_MOD_LINEAR:
+ return true;
+ case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
+ return color_plane == 1;
+ default:
+ return false;
+ }
}

static u32 intel_adjust_aligned_offset(int *x, int *y,
@@ -2437,6 +2446,7 @@ static unsigned int intel_fb_modifier_to_tiling(u64 fb_modifier)
case I915_FORMAT_MOD_Y_TILED:
case I915_FORMAT_MOD_Y_TILED_CCS:
case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
return I915_TILING_Y;
default:
return I915_TILING_NONE;
@@ -2510,6 +2520,7 @@ intel_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
ARRAY_SIZE(skl_ccs_formats),
cmd->pixel_format);
case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
return lookup_format_info(gen12_ccs_formats,
ARRAY_SIZE(gen12_ccs_formats),
cmd->pixel_format);
@@ -2521,6 +2532,7 @@ intel_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
bool is_ccs_modifier(u64 modifier)
{
return modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS ||
+ modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS ||
modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
}
@@ -4093,6 +4105,8 @@ static u32 skl_plane_ctl_tiling(u64 fb_modifier)
/* fall through */
case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
return PLANE_CTL_TILED_Y | PLANE_CTL_RENDER_DECOMPRESSION_ENABLE;
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
+ return PLANE_CTL_TILED_Y | PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE;
case I915_FORMAT_MOD_Yf_TILED:
return PLANE_CTL_TILED_YF;
case I915_FORMAT_MOD_Yf_TILED_CCS:
@@ -9870,6 +9884,8 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
fb->modifier = INTEL_GEN(dev_priv) >= 12 ?
I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS :
I915_FORMAT_MOD_Y_TILED_CCS;
+ else if (val & PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE)
+ fb->modifier = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS;
else
fb->modifier = I915_FORMAT_MOD_Y_TILED;
break;
@@ -15740,7 +15756,8 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
* The main surface pitch must be paded to a multiple of four
* tile widths.
*/
- if (fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS &&
+ if ((fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS ||
+ fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS) &&
i == 0)
stride_alignment *= 4;

diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index 73d32017be89..5df3a899068e 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -1749,7 +1749,8 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
fb->modifier == I915_FORMAT_MOD_Yf_TILED ||
fb->modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
fb->modifier == I915_FORMAT_MOD_Yf_TILED_CCS ||
- fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS)) {
+ fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS ||
+ fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS)) {
DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
return -EINVAL;
}
@@ -2163,6 +2164,7 @@ static const u64 skl_plane_format_modifiers_ccs[] = {

static const u64 gen12_plane_format_modifiers_ccs[] = {
I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
+ I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,
I915_FORMAT_MOD_Y_TILED,
I915_FORMAT_MOD_X_TILED,
DRM_FORMAT_MOD_LINEAR,
@@ -2320,7 +2322,13 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
u32 format, u64 modifier)
{
+ struct intel_plane *plane = to_intel_plane(_plane);
+
switch (modifier) {
+ case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
+ if (plane->id >= PLANE_SPRITE4)
+ return false;
+ /* fall through */
case DRM_FORMAT_MOD_LINEAR:
case I915_FORMAT_MOD_X_TILED:
case I915_FORMAT_MOD_Y_TILED:
@@ -2338,14 +2346,18 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
if (is_ccs_modifier(modifier))
return true;
/* fall through */
- case DRM_FORMAT_RGB565:
- case DRM_FORMAT_XRGB2101010:
- case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
+ if (modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS)
+ return true;
+ /* fall through */
+ /* TODO: Media decompression does support NV12 */
case DRM_FORMAT_NV12:
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_C8:
if (modifier == DRM_FORMAT_MOD_LINEAR ||
modifier == I915_FORMAT_MOD_X_TILED ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4c402239bba7..7ff207815087 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6788,6 +6788,7 @@ enum {
#define PLANE_CTL_TILED_Y (4 << 10)
#define PLANE_CTL_TILED_YF (5 << 10)
#define PLANE_CTL_FLIP_HORIZONTAL (1 << 8)
+#define PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE (1 << 4) /* TGL+ */
#define PLANE_CTL_ALPHA_MASK (0x3 << 4) /* Pre-GLK */
#define PLANE_CTL_ALPHA_DISABLE (0 << 4)
#define PLANE_CTL_ALPHA_SW_PREMULTIPLY (2 << 4)
--
2.21.0