diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-09-22 19:18:51 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-09-22 19:18:51 +0300 |
commit | 48bb67d3f1937ed43aaac613080d8ae23853db55 (patch) | |
tree | a3dc591abd1ab9da222f5c4f1138c2bc91bb1b5a /drivers | |
parent | 2f8d62daf2b5d9835ccd1ae0407de130156c17c1 (diff) | |
parent | b41b28366d3b176c8297961de4f095f2e392402d (diff) | |
download | linux-48bb67d3f1937ed43aaac613080d8ae23853db55.tar.xz |
Merge tag 'drm-fixes-2023-09-22-2' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Ben Skeggs is stepping away from nouveau and Red Hat for personal
reasons, he'll be missed and we intend to fill the gaps in the
upcoming time with Danilo and Lyude stepping in for now.
Otherwise i915, nouveau, amdgpu with a few each and some misc spread
around.
MAINTAINERS:
- drop Ben as he retired from nouveau
core:
- drm_mm test fixes
fbdev:
- Kconfig fixes
ivpu:
- IRQ-handling fixes
meson:
- Fix memory leak in HDMI EDID code
nouveau:
- Correct type casting
- Fix memory leak in scheduler
- u_memcpya() fixes
i915:
- Prevent error pointer dereference
- Fix PMU busyness values when using GuC mode
amdgpu:
- MST fix
- Vbios part number reporting fix
- Fix a possible memory leak in an error case in the RAS code
- Fix low resolution modes on eDP
amdkfd:
- Fix GPU address for user queue wptr when GART is not at 0"
* tag 'drm-fixes-2023-09-22-2' of git://anongit.freedesktop.org/drm/drm:
MAINTAINERS: remove myself as nouveau maintainer
fbdev/sh7760fb: Depend on FB=y
drm/amdkfd: Use gpu_offset for user queue's wptr
drm/amd/display: fix the ability to use lower resolution modes on eDP
drm/amdgpu: fix a memory leak in amdgpu_ras_feature_enable
Revert "drm/amdgpu: Report vbios version instead of PN"
drm/amd/display: Fix MST recognizes connected displays as one
drm/virtio: clean out_fence on complete_submit
i915/pmu: Move execlist stats initialization to execlist specific setup
drm/i915/gt: Prevent error pointer dereference
drm/meson: fix memory leak on ->hpd_notify callback
accel/ivpu/40xx: Fix buttress interrupt handling
nouveau/u_memcpya: fix NULL vs error pointer bug
nouveau/u_memcpya: use vmemdup_user
drm/nouveau: sched: fix leaking memory of timedout job
drm/nouveau: fence: fix type cast warning in nouveau_fence_emit()
drm: fix up fbdev Kconfig defaults
drm/tests: Fix incorrect argument in drm_test_mm_insert_range
Diffstat (limited to 'drivers')
22 files changed, 61 insertions, 52 deletions
diff --git a/drivers/accel/ivpu/ivpu_hw_40xx.c b/drivers/accel/ivpu/ivpu_hw_40xx.c index 34626d66fa10..00c5dbbe6847 100644 --- a/drivers/accel/ivpu/ivpu_hw_40xx.c +++ b/drivers/accel/ivpu/ivpu_hw_40xx.c @@ -1046,7 +1046,8 @@ static irqreturn_t ivpu_hw_40xx_irqb_handler(struct ivpu_device *vdev, int irq) if (status == 0) return IRQ_NONE; - REGB_WR32(VPU_40XX_BUTTRESS_INTERRUPT_STAT, status); + /* Disable global interrupt before handling local buttress interrupts */ + REGB_WR32(VPU_40XX_BUTTRESS_GLOBAL_INT_MASK, 0x1); if (REG_TEST_FLD(VPU_40XX_BUTTRESS_INTERRUPT_STAT, FREQ_CHANGE, status)) ivpu_dbg(vdev, IRQ, "FREQ_CHANGE"); @@ -1092,6 +1093,12 @@ static irqreturn_t ivpu_hw_40xx_irqb_handler(struct ivpu_device *vdev, int irq) schedule_recovery = true; } + /* This must be done after interrupts are cleared at the source. */ + REGB_WR32(VPU_40XX_BUTTRESS_INTERRUPT_STAT, status); + + /* Re-enable global interrupt */ + REGB_WR32(VPU_40XX_BUTTRESS_GLOBAL_INT_MASK, 0x0); + if (schedule_recovery) ivpu_pm_schedule_recovery(vdev); diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index ab9ef1c20349..3caa020391c7 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -136,7 +136,7 @@ config DRM_FBDEV_EMULATION bool "Enable legacy fbdev support for your modesetting driver" depends on DRM select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE - default y + default FB help Choose this option if you have a need for the legacy fbdev support. Note that this support also provides the linux console diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c index 73ee14f7a9a4..dce9e7d5e4ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c @@ -1776,7 +1776,7 @@ static ssize_t amdgpu_atombios_get_vbios_version(struct device *dev, struct amdgpu_device *adev = drm_to_adev(ddev); struct atom_context *ctx = adev->mode_info.atom_context; - return sysfs_emit(buf, "%s\n", ctx->vbios_ver_str); + return sysfs_emit(buf, "%s\n", ctx->vbios_pn); } static DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c index 937c54fc7174..163445baa4fc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -801,6 +801,7 @@ int amdgpu_ras_feature_enable(struct amdgpu_device *adev, enable ? "enable":"disable", get_ras_block_str(head), amdgpu_ras_is_poison_mode_supported(adev), ret); + kfree(info); return ret; } diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c index 8a6cb41444a4..0d3d538b64eb 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c @@ -216,7 +216,7 @@ static int add_queue_mes(struct device_queue_manager *dqm, struct queue *q, if (q->wptr_bo) { wptr_addr_off = (uint64_t)q->properties.write_ptr & (PAGE_SIZE - 1); - queue_input.wptr_mc_addr = ((uint64_t)q->wptr_bo->tbo.resource->start << PAGE_SHIFT) + wptr_addr_off; + queue_input.wptr_mc_addr = amdgpu_bo_gpu_offset(q->wptr_bo) + wptr_addr_off; } queue_input.is_kfd_process = 1; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index c6fd34bab358..868946dd7ef1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -6098,8 +6098,6 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector, if (recalculate_timing) drm_mode_set_crtcinfo(&saved_mode, 0); - else if (!old_stream) - drm_mode_set_crtcinfo(&mode, 0); /* * If scaling is enabled and refresh rate didn't change @@ -6661,6 +6659,8 @@ enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connec goto fail; } + drm_mode_set_crtcinfo(mode, 0); + stream = create_validate_stream_for_sink(aconnector, mode, to_dm_connector_state(connector->state), NULL); diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 478281f2a5ba..2a6157555fd1 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -1178,12 +1178,15 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx) dto_params.otg_inst = tg->inst; dto_params.timing = &pipe_ctx->stream->timing; dp_hpo_inst = pipe_ctx->stream_res.hpo_dp_stream_enc->inst; - dccg->funcs->set_dtbclk_dto(dccg, &dto_params); - dccg->funcs->disable_symclk32_se(dccg, dp_hpo_inst); - dccg->funcs->set_dpstreamclk(dccg, REFCLK, tg->inst, dp_hpo_inst); - } else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST && dccg->funcs->disable_symclk_se) + if (dccg) { + dccg->funcs->set_dtbclk_dto(dccg, &dto_params); + dccg->funcs->disable_symclk32_se(dccg, dp_hpo_inst); + dccg->funcs->set_dpstreamclk(dccg, REFCLK, tg->inst, dp_hpo_inst); + } + } else if (dccg && dccg->funcs->disable_symclk_se) { dccg->funcs->disable_symclk_se(dccg, stream_enc->stream_enc_inst, link_enc->transmitter - TRANSMITTER_UNIPHY_A); + } if (dc->link_srv->dp_is_128b_132b_signal(pipe_ctx)) { /* TODO: This looks like a bug to me as we are disabling HPO IO when @@ -2658,11 +2661,11 @@ void dce110_prepare_bandwidth( struct clk_mgr *dccg = dc->clk_mgr; dce110_set_safe_displaymarks(&context->res_ctx, dc->res_pool); - - dccg->funcs->update_clocks( - dccg, - context, - false); + if (dccg) + dccg->funcs->update_clocks( + dccg, + context, + false); } void dce110_optimize_bandwidth( @@ -2673,10 +2676,11 @@ void dce110_optimize_bandwidth( dce110_set_displaymarks(dc, context); - dccg->funcs->update_clocks( - dccg, - context, - true); + if (dccg) + dccg->funcs->update_clocks( + dccg, + context, + true); } static void dce110_program_front_end_for_pipe( diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index e72f15ac0048..aeadc587433f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -2692,8 +2692,6 @@ void dcn20_enable_stream(struct pipe_ctx *pipe_ctx) struct dce_hwseq *hws = dc->hwseq; unsigned int k1_div = PIXEL_RATE_DIV_NA; unsigned int k2_div = PIXEL_RATE_DIV_NA; - struct link_encoder *link_enc = link_enc_cfg_get_link_enc(pipe_ctx->stream->link); - struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc; if (dc->link_srv->dp_is_128b_132b_signal(pipe_ctx)) { if (dc->hwseq->funcs.setup_hpo_hw_control) @@ -2713,10 +2711,8 @@ void dcn20_enable_stream(struct pipe_ctx *pipe_ctx) dto_params.timing = &pipe_ctx->stream->timing; dto_params.ref_dtbclk_khz = dc->clk_mgr->funcs->get_dtb_ref_clk_frequency(dc->clk_mgr); dccg->funcs->set_dtbclk_dto(dccg, &dto_params); - } else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST && dccg->funcs->enable_symclk_se) - dccg->funcs->enable_symclk_se(dccg, - stream_enc->stream_enc_inst, link_enc->transmitter - TRANSMITTER_UNIPHY_A); - + } else { + } if (hws->funcs.calculate_dccg_k1_k2_values && dc->res_pool->dccg->funcs->set_pixel_rate_div) { hws->funcs.calculate_dccg_k1_k2_values(pipe_ctx, &k1_div, &k2_div); diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_mpc.c index 3082da04a63d..1d052f08aff5 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_mpc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_mpc.c @@ -75,7 +75,7 @@ void mpc32_power_on_blnd_lut( if (power_on) { REG_UPDATE(MPCC_MCM_MEM_PWR_CTRL[mpcc_id], MPCC_MCM_1DLUT_MEM_PWR_FORCE, 0); REG_WAIT(MPCC_MCM_MEM_PWR_CTRL[mpcc_id], MPCC_MCM_1DLUT_MEM_PWR_STATE, 0, 1, 5); - } else { + } else if (!mpc->ctx->dc->debug.disable_mem_low_power) { ASSERT(false); /* TODO: change to mpc * dpp_base->ctx->dc->optimized_required = true; diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index ee15486fed0d..e85d70a62123 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -558,7 +558,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id, DRIVER_CAPS(i915)->has_logical_contexts = true; ewma__engine_latency_init(&engine->latency); - seqcount_init(&engine->stats.execlists.lock); ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier); diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index 8a641bcf777c..3292524469d5 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -3550,6 +3550,8 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine) logical_ring_default_vfuncs(engine); logical_ring_default_irqs(engine); + seqcount_init(&engine->stats.execlists.lock); + if (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE) rcs_submission_override(engine); diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 957d0aeb0c02..c378cc7c953c 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1094,6 +1094,9 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine) I915_BO_ALLOC_PM_VOLATILE); if (IS_ERR(obj)) { obj = i915_gem_object_create_shmem(engine->i915, context_size); + if (IS_ERR(obj)) + return ERR_CAST(obj); + /* * Wa_22016122933: For Media version 13.0, all Media GT shared * memory needs to be mapped as WC on CPU side and UC (PAT @@ -1102,8 +1105,6 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine) if (intel_gt_needs_wa_22016122933(engine->gt)) i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); } - if (IS_ERR(obj)) - return ERR_CAST(obj); vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); if (IS_ERR(vma)) { diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c index 9913971fa5d2..25ea76558690 100644 --- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c +++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c @@ -334,6 +334,8 @@ static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge, return; cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid); + + kfree(edid); } else cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier); } diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 1fe17ff95f5e..e73a233c6572 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -189,21 +189,12 @@ u_free(void *addr) static inline void * u_memcpya(uint64_t user, unsigned int nmemb, unsigned int size) { - void *mem; - void __user *userptr = (void __force __user *)(uintptr_t)user; + void __user *userptr = u64_to_user_ptr(user); + size_t bytes; - size *= nmemb; - - mem = kvmalloc(size, GFP_KERNEL); - if (!mem) - return ERR_PTR(-ENOMEM); - - if (copy_from_user(mem, userptr, size)) { - u_free(mem); - return ERR_PTR(-EFAULT); - } - - return mem; + if (unlikely(check_mul_overflow(nmemb, size, &bytes))) + return ERR_PTR(-EOVERFLOW); + return vmemdup_user(userptr, bytes); } #include <nvif/object.h> diff --git a/drivers/gpu/drm/nouveau/nouveau_exec.c b/drivers/gpu/drm/nouveau/nouveau_exec.c index 19024ce21fbb..5dda94e1318c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_exec.c +++ b/drivers/gpu/drm/nouveau/nouveau_exec.c @@ -213,7 +213,7 @@ nouveau_exec_job_timeout(struct nouveau_job *job) nouveau_sched_entity_fini(job->entity); - return DRM_GPU_SCHED_STAT_ENODEV; + return DRM_GPU_SCHED_STAT_NOMINAL; } static struct nouveau_job_ops nouveau_exec_job_ops = { diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c index 61d9e70da9fd..ca762ea55413 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fence.c +++ b/drivers/gpu/drm/nouveau/nouveau_fence.c @@ -207,7 +207,7 @@ nouveau_fence_context_new(struct nouveau_channel *chan, struct nouveau_fence_cha int nouveau_fence_emit(struct nouveau_fence *fence) { - struct nouveau_channel *chan = fence->channel; + struct nouveau_channel *chan = unrcu_pointer(fence->channel); struct nouveau_fence_chan *fctx = chan->fence; struct nouveau_fence_priv *priv = (void*)chan->drm->fence; int ret; diff --git a/drivers/gpu/drm/nouveau/nouveau_sched.c b/drivers/gpu/drm/nouveau/nouveau_sched.c index 88217185e0f3..3b7ea5221226 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sched.c +++ b/drivers/gpu/drm/nouveau/nouveau_sched.c @@ -375,14 +375,20 @@ nouveau_sched_run_job(struct drm_sched_job *sched_job) static enum drm_gpu_sched_stat nouveau_sched_timedout_job(struct drm_sched_job *sched_job) { + struct drm_gpu_scheduler *sched = sched_job->sched; struct nouveau_job *job = to_nouveau_job(sched_job); + enum drm_gpu_sched_stat stat = DRM_GPU_SCHED_STAT_NOMINAL; - NV_PRINTK(warn, job->cli, "Job timed out.\n"); + drm_sched_stop(sched, sched_job); if (job->ops->timeout) - return job->ops->timeout(job); + stat = job->ops->timeout(job); + else + NV_PRINTK(warn, job->cli, "Generic job timeout.\n"); + + drm_sched_start(sched, true); - return DRM_GPU_SCHED_STAT_ENODEV; + return stat; } static void diff --git a/drivers/gpu/drm/tests/drm_mm_test.c b/drivers/gpu/drm/tests/drm_mm_test.c index 186b28dc7038..05d5e7af6d25 100644 --- a/drivers/gpu/drm/tests/drm_mm_test.c +++ b/drivers/gpu/drm/tests/drm_mm_test.c @@ -939,7 +939,7 @@ static void drm_test_mm_insert_range(struct kunit *test) KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 0, max - 1)); KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 0, max / 2)); KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, - max / 2, max / 2)); + max / 2, max)); KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, max / 4 + 1, 3 * max / 4 - 1)); diff --git a/drivers/gpu/drm/virtio/virtgpu_submit.c b/drivers/gpu/drm/virtio/virtgpu_submit.c index 3c00135ead45..5c514946bbad 100644 --- a/drivers/gpu/drm/virtio/virtgpu_submit.c +++ b/drivers/gpu/drm/virtio/virtgpu_submit.c @@ -361,7 +361,6 @@ static void virtio_gpu_complete_submit(struct virtio_gpu_submit *submit) submit->buf = NULL; submit->buflist = NULL; submit->sync_file = NULL; - submit->out_fence = NULL; submit->out_fence_fd = -1; } diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig index 1b5a319971ed..30577b1d3de5 100644 --- a/drivers/video/console/Kconfig +++ b/drivers/video/console/Kconfig @@ -73,6 +73,7 @@ config DUMMY_CONSOLE_ROWS config FRAMEBUFFER_CONSOLE bool "Framebuffer Console support" depends on FB_CORE && !UML + default DRM_FBDEV_EMULATION select VT_HW_CONSOLE_BINDING select CRC32 select FONT_SUPPORT diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index eac0ba39581e..c29754b65c0e 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -1762,7 +1762,7 @@ config FB_COBALT config FB_SH7760 bool "SH7760/SH7763/SH7720/SH7721 LCDC support" - depends on FB && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \ + depends on FB=y && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \ || CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721) select FB_IOMEM_HELPERS help diff --git a/drivers/video/fbdev/core/Kconfig b/drivers/video/fbdev/core/Kconfig index baf7e852c75b..5ac1b0637531 100644 --- a/drivers/video/fbdev/core/Kconfig +++ b/drivers/video/fbdev/core/Kconfig @@ -28,7 +28,7 @@ config FIRMWARE_EDID config FB_DEVICE bool "Provide legacy /dev/fb* device" depends on FB_CORE - default y + default FB help Say Y here if you want the legacy /dev/fb* device file and interfaces within sysfs anc procfs. It is only required if you |