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path: root/drivers/gpu/drm/i915/display/skl_scaler.c
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Diffstat (limited to 'drivers/gpu/drm/i915/display/skl_scaler.c')
-rw-r--r--drivers/gpu/drm/i915/display/skl_scaler.c556
1 files changed, 556 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
new file mode 100644
index 000000000000..17a98cb627df
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/skl_scaler.c
@@ -0,0 +1,556 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+#include "intel_display_types.h"
+#include "skl_scaler.h"
+#include "skl_universal_plane.h"
+
+/*
+ * The hardware phase 0.0 refers to the center of the pixel.
+ * We want to start from the top/left edge which is phase
+ * -0.5. That matches how the hardware calculates the scaling
+ * factors (from top-left of the first pixel to bottom-right
+ * of the last pixel, as opposed to the pixel centers).
+ *
+ * For 4:2:0 subsampled chroma planes we obviously have to
+ * adjust that so that the chroma sample position lands in
+ * the right spot.
+ *
+ * Note that for packed YCbCr 4:2:2 formats there is no way to
+ * control chroma siting. The hardware simply replicates the
+ * chroma samples for both of the luma samples, and thus we don't
+ * actually get the expected MPEG2 chroma siting convention :(
+ * The same behaviour is observed on pre-SKL platforms as well.
+ *
+ * Theory behind the formula (note that we ignore sub-pixel
+ * source coordinates):
+ * s = source sample position
+ * d = destination sample position
+ *
+ * Downscaling 4:1:
+ * -0.5
+ * | 0.0
+ * | | 1.5 (initial phase)
+ * | | |
+ * v v v
+ * | s | s | s | s |
+ * | d |
+ *
+ * Upscaling 1:4:
+ * -0.5
+ * | -0.375 (initial phase)
+ * | | 0.0
+ * | | |
+ * v v v
+ * | s |
+ * | d | d | d | d |
+ */
+static u16 skl_scaler_calc_phase(int sub, int scale, bool chroma_cosited)
+{
+ int phase = -0x8000;
+ u16 trip = 0;
+
+ if (chroma_cosited)
+ phase += (sub - 1) * 0x8000 / sub;
+
+ phase += scale / (2 * sub);
+
+ /*
+ * Hardware initial phase limited to [-0.5:1.5].
+ * Since the max hardware scale factor is 3.0, we
+ * should never actually excdeed 1.0 here.
+ */
+ WARN_ON(phase < -0x8000 || phase > 0x18000);
+
+ if (phase < 0)
+ phase = 0x10000 + phase;
+ else
+ trip = PS_PHASE_TRIP;
+
+ return ((phase >> 2) & PS_PHASE_MASK) | trip;
+}
+
+#define SKL_MIN_SRC_W 8
+#define SKL_MAX_SRC_W 4096
+#define SKL_MIN_SRC_H 8
+#define SKL_MAX_SRC_H 4096
+#define SKL_MIN_DST_W 8
+#define SKL_MAX_DST_W 4096
+#define SKL_MIN_DST_H 8
+#define SKL_MAX_DST_H 4096
+#define ICL_MAX_SRC_W 5120
+#define ICL_MAX_SRC_H 4096
+#define ICL_MAX_DST_W 5120
+#define ICL_MAX_DST_H 4096
+#define SKL_MIN_YUV_420_SRC_W 16
+#define SKL_MIN_YUV_420_SRC_H 16
+
+static int
+skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
+ unsigned int scaler_user, int *scaler_id,
+ int src_w, int src_h, int dst_w, int dst_h,
+ const struct drm_format_info *format,
+ u64 modifier, bool need_scaler)
+{
+ struct intel_crtc_scaler_state *scaler_state =
+ &crtc_state->scaler_state;
+ struct intel_crtc *intel_crtc =
+ to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+ const struct drm_display_mode *adjusted_mode =
+ &crtc_state->hw.adjusted_mode;
+
+ /*
+ * Src coordinates are already rotated by 270 degrees for
+ * the 90/270 degree plane rotation cases (to match the
+ * GTT mapping), hence no need to account for rotation here.
+ */
+ if (src_w != dst_w || src_h != dst_h)
+ need_scaler = true;
+
+ /*
+ * Scaling/fitting not supported in IF-ID mode in GEN9+
+ * TODO: Interlace fetch mode doesn't support YUV420 planar formats.
+ * Once NV12 is enabled, handle it here while allocating scaler
+ * for NV12.
+ */
+ if (DISPLAY_VER(dev_priv) >= 9 && crtc_state->hw.enable &&
+ need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+ drm_dbg_kms(&dev_priv->drm,
+ "Pipe/Plane scaling not supported with IF-ID mode\n");
+ return -EINVAL;
+ }
+
+ /*
+ * if plane is being disabled or scaler is no more required or force detach
+ * - free scaler binded to this plane/crtc
+ * - in order to do this, update crtc->scaler_usage
+ *
+ * Here scaler state in crtc_state is set free so that
+ * scaler can be assigned to other user. Actual register
+ * update to free the scaler is done in plane/panel-fit programming.
+ * For this purpose crtc/plane_state->scaler_id isn't reset here.
+ */
+ if (force_detach || !need_scaler) {
+ if (*scaler_id >= 0) {
+ scaler_state->scaler_users &= ~(1 << scaler_user);
+ scaler_state->scalers[*scaler_id].in_use = 0;
+
+ drm_dbg_kms(&dev_priv->drm,
+ "scaler_user index %u.%u: "
+ "Staged freeing scaler id %d scaler_users = 0x%x\n",
+ intel_crtc->pipe, scaler_user, *scaler_id,
+ scaler_state->scaler_users);
+ *scaler_id = -1;
+ }
+ return 0;
+ }
+
+ if (format && intel_format_info_is_yuv_semiplanar(format, modifier) &&
+ (src_h < SKL_MIN_YUV_420_SRC_H || src_w < SKL_MIN_YUV_420_SRC_W)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "Planar YUV: src dimensions not met\n");
+ return -EINVAL;
+ }
+
+ /* range checks */
+ if (src_w < SKL_MIN_SRC_W || src_h < SKL_MIN_SRC_H ||
+ dst_w < SKL_MIN_DST_W || dst_h < SKL_MIN_DST_H ||
+ (DISPLAY_VER(dev_priv) >= 11 &&
+ (src_w > ICL_MAX_SRC_W || src_h > ICL_MAX_SRC_H ||
+ dst_w > ICL_MAX_DST_W || dst_h > ICL_MAX_DST_H)) ||
+ (DISPLAY_VER(dev_priv) < 11 &&
+ (src_w > SKL_MAX_SRC_W || src_h > SKL_MAX_SRC_H ||
+ dst_w > SKL_MAX_DST_W || dst_h > SKL_MAX_DST_H))) {
+ drm_dbg_kms(&dev_priv->drm,
+ "scaler_user index %u.%u: src %ux%u dst %ux%u "
+ "size is out of scaler range\n",
+ intel_crtc->pipe, scaler_user, src_w, src_h,
+ dst_w, dst_h);
+ return -EINVAL;
+ }
+
+ /* mark this plane as a scaler user in crtc_state */
+ scaler_state->scaler_users |= (1 << scaler_user);
+ drm_dbg_kms(&dev_priv->drm, "scaler_user index %u.%u: "
+ "staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",
+ intel_crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,
+ scaler_state->scaler_users);
+
+ return 0;
+}
+
+int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state)
+{
+ const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
+ int width, height;
+
+ if (crtc_state->pch_pfit.enabled) {
+ width = drm_rect_width(&crtc_state->pch_pfit.dst);
+ height = drm_rect_height(&crtc_state->pch_pfit.dst);
+ } else {
+ width = pipe_mode->crtc_hdisplay;
+ height = pipe_mode->crtc_vdisplay;
+ }
+ return skl_update_scaler(crtc_state, !crtc_state->hw.active,
+ SKL_CRTC_INDEX,
+ &crtc_state->scaler_state.scaler_id,
+ crtc_state->pipe_src_w, crtc_state->pipe_src_h,
+ width, height, NULL, 0,
+ crtc_state->pch_pfit.enabled);
+}
+
+/**
+ * skl_update_scaler_plane - Stages update to scaler state for a given plane.
+ * @crtc_state: crtc's scaler state
+ * @plane_state: atomic plane state to update
+ *
+ * Return
+ * 0 - scaler_usage updated successfully
+ * error - requested scaling cannot be supported or other error condition
+ */
+int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
+ struct intel_plane_state *plane_state)
+{
+ struct intel_plane *intel_plane =
+ to_intel_plane(plane_state->uapi.plane);
+ struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
+ struct drm_framebuffer *fb = plane_state->hw.fb;
+ int ret;
+ bool force_detach = !fb || !plane_state->uapi.visible;
+ bool need_scaler = false;
+
+ /* Pre-gen11 and SDR planes always need a scaler for planar formats. */
+ if (!icl_is_hdr_plane(dev_priv, intel_plane->id) &&
+ fb && intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
+ need_scaler = true;
+
+ ret = skl_update_scaler(crtc_state, force_detach,
+ drm_plane_index(&intel_plane->base),
+ &plane_state->scaler_id,
+ drm_rect_width(&plane_state->uapi.src) >> 16,
+ drm_rect_height(&plane_state->uapi.src) >> 16,
+ drm_rect_width(&plane_state->uapi.dst),
+ drm_rect_height(&plane_state->uapi.dst),
+ fb ? fb->format : NULL,
+ fb ? fb->modifier : 0,
+ need_scaler);
+
+ if (ret || plane_state->scaler_id < 0)
+ return ret;
+
+ /* check colorkey */
+ if (plane_state->ckey.flags) {
+ drm_dbg_kms(&dev_priv->drm,
+ "[PLANE:%d:%s] scaling with color key not allowed",
+ intel_plane->base.base.id,
+ intel_plane->base.name);
+ return -EINVAL;
+ }
+
+ /* Check src format */
+ switch (fb->format->format) {
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_XRGB8888:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_ARGB2101010:
+ case DRM_FORMAT_ABGR2101010:
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_XYUV8888:
+ case DRM_FORMAT_P010:
+ case DRM_FORMAT_P012:
+ case DRM_FORMAT_P016:
+ case DRM_FORMAT_Y210:
+ case DRM_FORMAT_Y212:
+ case DRM_FORMAT_Y216:
+ case DRM_FORMAT_XVYU2101010:
+ case DRM_FORMAT_XVYU12_16161616:
+ case DRM_FORMAT_XVYU16161616:
+ break;
+ case DRM_FORMAT_XBGR16161616F:
+ case DRM_FORMAT_ABGR16161616F:
+ case DRM_FORMAT_XRGB16161616F:
+ case DRM_FORMAT_ARGB16161616F:
+ if (DISPLAY_VER(dev_priv) >= 11)
+ break;
+ fallthrough;
+ default:
+ drm_dbg_kms(&dev_priv->drm,
+ "[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
+ intel_plane->base.base.id, intel_plane->base.name,
+ fb->base.id, fb->format->format);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cnl_coef_tap(int i)
+{
+ return i % 7;
+}
+
+static u16 cnl_nearest_filter_coef(int t)
+{
+ return t == 3 ? 0x0800 : 0x3000;
+}
+
+/*
+ * Theory behind setting nearest-neighbor integer scaling:
+ *
+ * 17 phase of 7 taps requires 119 coefficients in 60 dwords per set.
+ * The letter represents the filter tap (D is the center tap) and the number
+ * represents the coefficient set for a phase (0-16).
+ *
+ * +------------+------------------------+------------------------+
+ * |Index value | Data value coeffient 1 | Data value coeffient 2 |
+ * +------------+------------------------+------------------------+
+ * | 00h | B0 | A0 |
+ * +------------+------------------------+------------------------+
+ * | 01h | D0 | C0 |
+ * +------------+------------------------+------------------------+
+ * | 02h | F0 | E0 |
+ * +------------+------------------------+------------------------+
+ * | 03h | A1 | G0 |
+ * +------------+------------------------+------------------------+
+ * | 04h | C1 | B1 |
+ * +------------+------------------------+------------------------+
+ * | ... | ... | ... |
+ * +------------+------------------------+------------------------+
+ * | 38h | B16 | A16 |
+ * +------------+------------------------+------------------------+
+ * | 39h | D16 | C16 |
+ * +------------+------------------------+------------------------+
+ * | 3Ah | F16 | C16 |
+ * +------------+------------------------+------------------------+
+ * | 3Bh | Reserved | G16 |
+ * +------------+------------------------+------------------------+
+ *
+ * To enable nearest-neighbor scaling: program scaler coefficents with
+ * the center tap (Dxx) values set to 1 and all other values set to 0 as per
+ * SCALER_COEFFICIENT_FORMAT
+ *
+ */
+
+static void cnl_program_nearest_filter_coefs(struct drm_i915_private *dev_priv,
+ enum pipe pipe, int id, int set)
+{
+ int i;
+
+ intel_de_write_fw(dev_priv, CNL_PS_COEF_INDEX_SET(pipe, id, set),
+ PS_COEE_INDEX_AUTO_INC);
+
+ for (i = 0; i < 17 * 7; i += 2) {
+ u32 tmp;
+ int t;
+
+ t = cnl_coef_tap(i);
+ tmp = cnl_nearest_filter_coef(t);
+
+ t = cnl_coef_tap(i + 1);
+ tmp |= cnl_nearest_filter_coef(t) << 16;
+
+ intel_de_write_fw(dev_priv, CNL_PS_COEF_DATA_SET(pipe, id, set),
+ tmp);
+ }
+
+ intel_de_write_fw(dev_priv, CNL_PS_COEF_INDEX_SET(pipe, id, set), 0);
+}
+
+static u32 skl_scaler_get_filter_select(enum drm_scaling_filter filter, int set)
+{
+ if (filter == DRM_SCALING_FILTER_NEAREST_NEIGHBOR) {
+ return (PS_FILTER_PROGRAMMED |
+ PS_Y_VERT_FILTER_SELECT(set) |
+ PS_Y_HORZ_FILTER_SELECT(set) |
+ PS_UV_VERT_FILTER_SELECT(set) |
+ PS_UV_HORZ_FILTER_SELECT(set));
+ }
+
+ return PS_FILTER_MEDIUM;
+}
+
+static void skl_scaler_setup_filter(struct drm_i915_private *dev_priv, enum pipe pipe,
+ int id, int set, enum drm_scaling_filter filter)
+{
+ switch (filter) {
+ case DRM_SCALING_FILTER_DEFAULT:
+ break;
+ case DRM_SCALING_FILTER_NEAREST_NEIGHBOR:
+ cnl_program_nearest_filter_coefs(dev_priv, pipe, id, set);
+ break;
+ default:
+ MISSING_CASE(filter);
+ }
+}
+
+void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct intel_crtc_scaler_state *scaler_state =
+ &crtc_state->scaler_state;
+ struct drm_rect src = {
+ .x2 = crtc_state->pipe_src_w << 16,
+ .y2 = crtc_state->pipe_src_h << 16,
+ };
+ const struct drm_rect *dst = &crtc_state->pch_pfit.dst;
+ u16 uv_rgb_hphase, uv_rgb_vphase;
+ enum pipe pipe = crtc->pipe;
+ int width = drm_rect_width(dst);
+ int height = drm_rect_height(dst);
+ int x = dst->x1;
+ int y = dst->y1;
+ int hscale, vscale;
+ unsigned long irqflags;
+ int id;
+ u32 ps_ctrl;
+
+ if (!crtc_state->pch_pfit.enabled)
+ return;
+
+ if (drm_WARN_ON(&dev_priv->drm,
+ crtc_state->scaler_state.scaler_id < 0))
+ return;
+
+ hscale = drm_rect_calc_hscale(&src, dst, 0, INT_MAX);
+ vscale = drm_rect_calc_vscale(&src, dst, 0, INT_MAX);
+
+ uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
+ uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
+
+ id = scaler_state->scaler_id;
+
+ ps_ctrl = skl_scaler_get_filter_select(crtc_state->hw.scaling_filter, 0);
+ ps_ctrl |= PS_SCALER_EN | scaler_state->scalers[id].mode;
+
+ spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+ skl_scaler_setup_filter(dev_priv, pipe, id, 0,
+ crtc_state->hw.scaling_filter);
+
+ intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, id), ps_ctrl);
+
+ intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, id),
+ PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_vphase));
+ intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, id),
+ PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_hphase));
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, id),
+ x << 16 | y);
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, id),
+ width << 16 | height);
+
+ spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+void
+skl_program_plane_scaler(struct intel_plane *plane,
+ const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+ enum pipe pipe = plane->pipe;
+ int scaler_id = plane_state->scaler_id;
+ const struct intel_scaler *scaler =
+ &crtc_state->scaler_state.scalers[scaler_id];
+ int crtc_x = plane_state->uapi.dst.x1;
+ int crtc_y = plane_state->uapi.dst.y1;
+ u32 crtc_w = drm_rect_width(&plane_state->uapi.dst);
+ u32 crtc_h = drm_rect_height(&plane_state->uapi.dst);
+ u16 y_hphase, uv_rgb_hphase;
+ u16 y_vphase, uv_rgb_vphase;
+ int hscale, vscale;
+ u32 ps_ctrl;
+
+ hscale = drm_rect_calc_hscale(&plane_state->uapi.src,
+ &plane_state->uapi.dst,
+ 0, INT_MAX);
+ vscale = drm_rect_calc_vscale(&plane_state->uapi.src,
+ &plane_state->uapi.dst,
+ 0, INT_MAX);
+
+ /* TODO: handle sub-pixel coordinates */
+ if (intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&
+ !icl_is_hdr_plane(dev_priv, plane->id)) {
+ y_hphase = skl_scaler_calc_phase(1, hscale, false);
+ y_vphase = skl_scaler_calc_phase(1, vscale, false);
+
+ /* MPEG2 chroma siting convention */
+ uv_rgb_hphase = skl_scaler_calc_phase(2, hscale, true);
+ uv_rgb_vphase = skl_scaler_calc_phase(2, vscale, false);
+ } else {
+ /* not used */
+ y_hphase = 0;
+ y_vphase = 0;
+
+ uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
+ uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
+ }
+
+ ps_ctrl = skl_scaler_get_filter_select(plane_state->hw.scaling_filter, 0);
+ ps_ctrl |= PS_SCALER_EN | PS_PLANE_SEL(plane->id) | scaler->mode;
+
+ skl_scaler_setup_filter(dev_priv, pipe, scaler_id, 0,
+ plane_state->hw.scaling_filter);
+
+ intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, scaler_id), ps_ctrl);
+ intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, scaler_id),
+ PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
+ intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, scaler_id),
+ PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, scaler_id),
+ (crtc_x << 16) | crtc_y);
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, scaler_id),
+ (crtc_w << 16) | crtc_h);
+}
+
+static void skl_detach_scaler(struct intel_crtc *intel_crtc, int id)
+{
+ struct drm_device *dev = intel_crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+ intel_de_write_fw(dev_priv, SKL_PS_CTRL(intel_crtc->pipe, id), 0);
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(intel_crtc->pipe, id), 0);
+ intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(intel_crtc->pipe, id), 0);
+
+ spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+/*
+ * This function detaches (aka. unbinds) unused scalers in hardware
+ */
+void skl_detach_scalers(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ const struct intel_crtc_scaler_state *scaler_state =
+ &crtc_state->scaler_state;
+ int i;
+
+ /* loop through and disable scalers that aren't in use */
+ for (i = 0; i < intel_crtc->num_scalers; i++) {
+ if (!scaler_state->scalers[i].in_use)
+ skl_detach_scaler(intel_crtc, i);
+ }
+}
+
+void skl_scaler_disable(const struct intel_crtc_state *old_crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
+ int i;
+
+ for (i = 0; i < crtc->num_scalers; i++)
+ skl_detach_scaler(crtc, i);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-30 12:47:02 +0300