diff options
Diffstat (limited to 'drivers/gpu/drm/arm/malidp_crtc.c')
-rw-r--r-- | drivers/gpu/drm/arm/malidp_crtc.c | 341 |
1 files changed, 325 insertions, 16 deletions
diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c index f9d665550d3e..9446a673d469 100644 --- a/drivers/gpu/drm/arm/malidp_crtc.c +++ b/drivers/gpu/drm/arm/malidp_crtc.c @@ -16,6 +16,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <linux/clk.h> +#include <linux/pm_runtime.h> #include <video/videomode.h> #include "malidp_drv.h" @@ -35,13 +36,6 @@ static bool malidp_crtc_mode_fixup(struct drm_crtc *crtc, long rate, req_rate = mode->crtc_clock * 1000; if (req_rate) { - rate = clk_round_rate(hwdev->mclk, req_rate); - if (rate < req_rate) { - DRM_DEBUG_DRIVER("mclk clock unable to reach %d kHz\n", - mode->crtc_clock); - return false; - } - rate = clk_round_rate(hwdev->pxlclk, req_rate); if (rate != req_rate) { DRM_DEBUG_DRIVER("pxlclk doesn't support %ld Hz\n", @@ -58,9 +52,14 @@ static void malidp_crtc_enable(struct drm_crtc *crtc) struct malidp_drm *malidp = crtc_to_malidp_device(crtc); struct malidp_hw_device *hwdev = malidp->dev; struct videomode vm; + int err = pm_runtime_get_sync(crtc->dev->dev); - drm_display_mode_to_videomode(&crtc->state->adjusted_mode, &vm); + if (err < 0) { + DRM_DEBUG_DRIVER("Failed to enable runtime power management: %d\n", err); + return; + } + drm_display_mode_to_videomode(&crtc->state->adjusted_mode, &vm); clk_prepare_enable(hwdev->pxlclk); /* We rely on firmware to set mclk to a sensible level. */ @@ -75,10 +74,254 @@ static void malidp_crtc_disable(struct drm_crtc *crtc) { struct malidp_drm *malidp = crtc_to_malidp_device(crtc); struct malidp_hw_device *hwdev = malidp->dev; + int err; drm_crtc_vblank_off(crtc); hwdev->enter_config_mode(hwdev); clk_disable_unprepare(hwdev->pxlclk); + + err = pm_runtime_put(crtc->dev->dev); + if (err < 0) { + DRM_DEBUG_DRIVER("Failed to disable runtime power management: %d\n", err); + } +} + +static const struct gamma_curve_segment { + u16 start; + u16 end; +} segments[MALIDP_COEFFTAB_NUM_COEFFS] = { + /* sector 0 */ + { 0, 0 }, { 1, 1 }, { 2, 2 }, { 3, 3 }, + { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 }, + { 8, 8 }, { 9, 9 }, { 10, 10 }, { 11, 11 }, + { 12, 12 }, { 13, 13 }, { 14, 14 }, { 15, 15 }, + /* sector 1 */ + { 16, 19 }, { 20, 23 }, { 24, 27 }, { 28, 31 }, + /* sector 2 */ + { 32, 39 }, { 40, 47 }, { 48, 55 }, { 56, 63 }, + /* sector 3 */ + { 64, 79 }, { 80, 95 }, { 96, 111 }, { 112, 127 }, + /* sector 4 */ + { 128, 159 }, { 160, 191 }, { 192, 223 }, { 224, 255 }, + /* sector 5 */ + { 256, 319 }, { 320, 383 }, { 384, 447 }, { 448, 511 }, + /* sector 6 */ + { 512, 639 }, { 640, 767 }, { 768, 895 }, { 896, 1023 }, + { 1024, 1151 }, { 1152, 1279 }, { 1280, 1407 }, { 1408, 1535 }, + { 1536, 1663 }, { 1664, 1791 }, { 1792, 1919 }, { 1920, 2047 }, + { 2048, 2175 }, { 2176, 2303 }, { 2304, 2431 }, { 2432, 2559 }, + { 2560, 2687 }, { 2688, 2815 }, { 2816, 2943 }, { 2944, 3071 }, + { 3072, 3199 }, { 3200, 3327 }, { 3328, 3455 }, { 3456, 3583 }, + { 3584, 3711 }, { 3712, 3839 }, { 3840, 3967 }, { 3968, 4095 }, +}; + +#define DE_COEFTAB_DATA(a, b) ((((a) & 0xfff) << 16) | (((b) & 0xfff))) + +static void malidp_generate_gamma_table(struct drm_property_blob *lut_blob, + u32 coeffs[MALIDP_COEFFTAB_NUM_COEFFS]) +{ + struct drm_color_lut *lut = (struct drm_color_lut *)lut_blob->data; + int i; + + for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i) { + u32 a, b, delta_in, out_start, out_end; + + delta_in = segments[i].end - segments[i].start; + /* DP has 12-bit internal precision for its LUTs. */ + out_start = drm_color_lut_extract(lut[segments[i].start].green, + 12); + out_end = drm_color_lut_extract(lut[segments[i].end].green, 12); + a = (delta_in == 0) ? 0 : ((out_end - out_start) * 256) / delta_in; + b = out_start; + coeffs[i] = DE_COEFTAB_DATA(a, b); + } +} + +/* + * Check if there is a new gamma LUT and if it is of an acceptable size. Also, + * reject any LUTs that use distinct red, green, and blue curves. + */ +static int malidp_crtc_atomic_check_gamma(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct malidp_crtc_state *mc = to_malidp_crtc_state(state); + struct drm_color_lut *lut; + size_t lut_size; + int i; + + if (!state->color_mgmt_changed || !state->gamma_lut) + return 0; + + if (crtc->state->gamma_lut && + (crtc->state->gamma_lut->base.id == state->gamma_lut->base.id)) + return 0; + + if (state->gamma_lut->length % sizeof(struct drm_color_lut)) + return -EINVAL; + + lut_size = state->gamma_lut->length / sizeof(struct drm_color_lut); + if (lut_size != MALIDP_GAMMA_LUT_SIZE) + return -EINVAL; + + lut = (struct drm_color_lut *)state->gamma_lut->data; + for (i = 0; i < lut_size; ++i) + if (!((lut[i].red == lut[i].green) && + (lut[i].red == lut[i].blue))) + return -EINVAL; + + if (!state->mode_changed) { + int ret; + + state->mode_changed = true; + /* + * Kerneldoc for drm_atomic_helper_check_modeset mandates that + * it be invoked when the driver sets ->mode_changed. Since + * changing the gamma LUT doesn't depend on any external + * resources, it is safe to call it only once. + */ + ret = drm_atomic_helper_check_modeset(crtc->dev, state->state); + if (ret) + return ret; + } + + malidp_generate_gamma_table(state->gamma_lut, mc->gamma_coeffs); + return 0; +} + +/* + * Check if there is a new CTM and if it contains valid input. Valid here means + * that the number is inside the representable range for a Q3.12 number, + * excluding truncating the fractional part of the input data. + * + * The COLORADJ registers can be changed atomically. + */ +static int malidp_crtc_atomic_check_ctm(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct malidp_crtc_state *mc = to_malidp_crtc_state(state); + struct drm_color_ctm *ctm; + int i; + + if (!state->color_mgmt_changed) + return 0; + + if (!state->ctm) + return 0; + + if (crtc->state->ctm && (crtc->state->ctm->base.id == + state->ctm->base.id)) + return 0; + + /* + * The size of the ctm is checked in + * drm_atomic_replace_property_blob_from_id. + */ + ctm = (struct drm_color_ctm *)state->ctm->data; + for (i = 0; i < ARRAY_SIZE(ctm->matrix); ++i) { + /* Convert from S31.32 to Q3.12. */ + s64 val = ctm->matrix[i]; + u32 mag = ((((u64)val) & ~BIT_ULL(63)) >> 20) & + GENMASK_ULL(14, 0); + + /* + * Convert to 2s complement and check the destination's top bit + * for overflow. NB: Can't check before converting or it'd + * incorrectly reject the case: + * sign == 1 + * mag == 0x2000 + */ + if (val & BIT_ULL(63)) + mag = ~mag + 1; + if (!!(val & BIT_ULL(63)) != !!(mag & BIT(14))) + return -EINVAL; + mc->coloradj_coeffs[i] = mag; + } + + return 0; +} + +static int malidp_crtc_atomic_check_scaling(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct malidp_drm *malidp = crtc_to_malidp_device(crtc); + struct malidp_hw_device *hwdev = malidp->dev; + struct malidp_crtc_state *cs = to_malidp_crtc_state(state); + struct malidp_se_config *s = &cs->scaler_config; + struct drm_plane *plane; + struct videomode vm; + const struct drm_plane_state *pstate; + u32 h_upscale_factor = 0; /* U16.16 */ + u32 v_upscale_factor = 0; /* U16.16 */ + u8 scaling = cs->scaled_planes_mask; + int ret; + + if (!scaling) { + s->scale_enable = false; + goto mclk_calc; + } + + /* The scaling engine can only handle one plane at a time. */ + if (scaling & (scaling - 1)) + return -EINVAL; + + drm_atomic_crtc_state_for_each_plane_state(plane, pstate, state) { + struct malidp_plane *mp = to_malidp_plane(plane); + u32 phase; + + if (!(mp->layer->id & scaling)) + continue; + + /* + * Convert crtc_[w|h] to U32.32, then divide by U16.16 src_[w|h] + * to get the U16.16 result. + */ + h_upscale_factor = div_u64((u64)pstate->crtc_w << 32, + pstate->src_w); + v_upscale_factor = div_u64((u64)pstate->crtc_h << 32, + pstate->src_h); + + s->enhancer_enable = ((h_upscale_factor >> 16) >= 2 || + (v_upscale_factor >> 16) >= 2); + + s->input_w = pstate->src_w >> 16; + s->input_h = pstate->src_h >> 16; + s->output_w = pstate->crtc_w; + s->output_h = pstate->crtc_h; + +#define SE_N_PHASE 4 +#define SE_SHIFT_N_PHASE 12 + /* Calculate initial_phase and delta_phase for horizontal. */ + phase = s->input_w; + s->h_init_phase = + ((phase << SE_N_PHASE) / s->output_w + 1) / 2; + + phase = s->input_w; + phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE); + s->h_delta_phase = phase / s->output_w; + + /* Same for vertical. */ + phase = s->input_h; + s->v_init_phase = + ((phase << SE_N_PHASE) / s->output_h + 1) / 2; + + phase = s->input_h; + phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE); + s->v_delta_phase = phase / s->output_h; +#undef SE_N_PHASE +#undef SE_SHIFT_N_PHASE + s->plane_src_id = mp->layer->id; + } + + s->scale_enable = true; + s->hcoeff = malidp_se_select_coeffs(h_upscale_factor); + s->vcoeff = malidp_se_select_coeffs(v_upscale_factor); + +mclk_calc: + drm_display_mode_to_videomode(&state->adjusted_mode, &vm); + ret = hwdev->se_calc_mclk(hwdev, s, &vm); + if (ret < 0) + return -EINVAL; + return 0; } static int malidp_crtc_atomic_check(struct drm_crtc *crtc, @@ -90,6 +333,7 @@ static int malidp_crtc_atomic_check(struct drm_crtc *crtc, const struct drm_plane_state *pstate; u32 rot_mem_free, rot_mem_usable; int rotated_planes = 0; + int ret; /* * check if there is enough rotation memory available for planes @@ -156,7 +400,11 @@ static int malidp_crtc_atomic_check(struct drm_crtc *crtc, } } - return 0; + ret = malidp_crtc_atomic_check_gamma(crtc, state); + ret = ret ? ret : malidp_crtc_atomic_check_ctm(crtc, state); + ret = ret ? ret : malidp_crtc_atomic_check_scaling(crtc, state); + + return ret; } static const struct drm_crtc_helper_funcs malidp_crtc_helper_funcs = { @@ -166,6 +414,60 @@ static const struct drm_crtc_helper_funcs malidp_crtc_helper_funcs = { .atomic_check = malidp_crtc_atomic_check, }; +static struct drm_crtc_state *malidp_crtc_duplicate_state(struct drm_crtc *crtc) +{ + struct malidp_crtc_state *state, *old_state; + + if (WARN_ON(!crtc->state)) + return NULL; + + old_state = to_malidp_crtc_state(crtc->state); + state = kmalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + + __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); + memcpy(state->gamma_coeffs, old_state->gamma_coeffs, + sizeof(state->gamma_coeffs)); + memcpy(state->coloradj_coeffs, old_state->coloradj_coeffs, + sizeof(state->coloradj_coeffs)); + memcpy(&state->scaler_config, &old_state->scaler_config, + sizeof(state->scaler_config)); + state->scaled_planes_mask = 0; + + return &state->base; +} + +static void malidp_crtc_reset(struct drm_crtc *crtc) +{ + struct malidp_crtc_state *state = NULL; + + if (crtc->state) { + state = to_malidp_crtc_state(crtc->state); + __drm_atomic_helper_crtc_destroy_state(crtc->state); + } + + kfree(state); + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (state) { + crtc->state = &state->base; + crtc->state->crtc = crtc; + } +} + +static void malidp_crtc_destroy_state(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct malidp_crtc_state *mali_state = NULL; + + if (state) { + mali_state = to_malidp_crtc_state(state); + __drm_atomic_helper_crtc_destroy_state(state); + } + + kfree(mali_state); +} + static int malidp_crtc_enable_vblank(struct drm_crtc *crtc) { struct malidp_drm *malidp = crtc_to_malidp_device(crtc); @@ -186,12 +488,13 @@ static void malidp_crtc_disable_vblank(struct drm_crtc *crtc) } static const struct drm_crtc_funcs malidp_crtc_funcs = { + .gamma_set = drm_atomic_helper_legacy_gamma_set, .destroy = drm_crtc_cleanup, .set_config = drm_atomic_helper_set_config, .page_flip = drm_atomic_helper_page_flip, - .reset = drm_atomic_helper_crtc_reset, - .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .reset = malidp_crtc_reset, + .atomic_duplicate_state = malidp_crtc_duplicate_state, + .atomic_destroy_state = malidp_crtc_destroy_state, .enable_vblank = malidp_crtc_enable_vblank, .disable_vblank = malidp_crtc_disable_vblank, }; @@ -223,11 +526,17 @@ int malidp_crtc_init(struct drm_device *drm) ret = drm_crtc_init_with_planes(drm, &malidp->crtc, primary, NULL, &malidp_crtc_funcs, NULL); + if (ret) + goto crtc_cleanup_planes; - if (!ret) { - drm_crtc_helper_add(&malidp->crtc, &malidp_crtc_helper_funcs); - return 0; - } + drm_crtc_helper_add(&malidp->crtc, &malidp_crtc_helper_funcs); + drm_mode_crtc_set_gamma_size(&malidp->crtc, MALIDP_GAMMA_LUT_SIZE); + /* No inverse-gamma: it is per-plane. */ + drm_crtc_enable_color_mgmt(&malidp->crtc, 0, true, MALIDP_GAMMA_LUT_SIZE); + + malidp_se_set_enh_coeffs(malidp->dev); + + return 0; crtc_cleanup_planes: malidp_de_planes_destroy(drm); |