Hi Philipp, I love your patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v4.15-rc4 next-20171220] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Philipp-Zabel/media-dt-bindings-coda-Add-compatible-for-CodaHx4-on-i-MX51/20171221-050217 base: git://linuxtv.org/media_tree.git master config: x86_64-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/media/platform/coda/coda-bit.c: In function 'coda_setup_iram': >> drivers/media/platform/coda/coda-bit.c:648:28: warning: 'me_bits' may be used uninitialized in this function [-Wmaybe-uninitialized] iram_info->axi_sram_use |= me_bits; ^~ vim +/me_bits +648 drivers/media/platform/coda/coda-bit.c 588 589 static void coda_setup_iram(struct coda_ctx *ctx) 590 { 591 struct coda_iram_info *iram_info = &ctx->iram_info; 592 struct coda_dev *dev = ctx->dev; 593 int w64, w128; 594 int mb_width; 595 int dbk_bits; 596 int bit_bits; 597 int ip_bits; 598 int me_bits; 599 600 memset(iram_info, 0, sizeof(*iram_info)); 601 iram_info->next_paddr = dev->iram.paddr; 602 iram_info->remaining = dev->iram.size; 603 604 if (!dev->iram.vaddr) 605 return; 606 607 switch (dev->devtype->product) { 608 case CODA_HX4: 609 dbk_bits = CODA7_USE_HOST_DBK_ENABLE; 610 bit_bits = CODA7_USE_HOST_BIT_ENABLE; 611 ip_bits = CODA7_USE_HOST_IP_ENABLE; 612 me_bits = CODA7_USE_HOST_ME_ENABLE; 613 break; 614 case CODA_7541: 615 dbk_bits = CODA7_USE_HOST_DBK_ENABLE | CODA7_USE_DBK_ENABLE; 616 bit_bits = CODA7_USE_HOST_BIT_ENABLE | CODA7_USE_BIT_ENABLE; 617 ip_bits = CODA7_USE_HOST_IP_ENABLE | CODA7_USE_IP_ENABLE; 618 me_bits = CODA7_USE_HOST_ME_ENABLE | CODA7_USE_ME_ENABLE; 619 break; 620 case CODA_960: 621 dbk_bits = CODA9_USE_HOST_DBK_ENABLE | CODA9_USE_DBK_ENABLE; 622 bit_bits = CODA9_USE_HOST_BIT_ENABLE | CODA7_USE_BIT_ENABLE; 623 ip_bits = CODA9_USE_HOST_IP_ENABLE | CODA7_USE_IP_ENABLE; 624 break; 625 default: /* CODA_DX6 */ 626 return; 627 } 628 629 if (ctx->inst_type == CODA_INST_ENCODER) { 630 struct coda_q_data *q_data_src; 631 632 q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); 633 mb_width = DIV_ROUND_UP(q_data_src->width, 16); 634 w128 = mb_width * 128; 635 w64 = mb_width * 64; 636 637 /* Prioritize in case IRAM is too small for everything */ 638 if (dev->devtype->product == CODA_HX4 || 639 dev->devtype->product == CODA_7541) { 640 iram_info->search_ram_size = round_up(mb_width * 16 * 641 36 + 2048, 1024); 642 iram_info->search_ram_paddr = coda_iram_alloc(iram_info, 643 iram_info->search_ram_size); 644 if (!iram_info->search_ram_paddr) { 645 pr_err("IRAM is smaller than the search ram size\n"); 646 goto out; 647 } > 648 iram_info->axi_sram_use |= me_bits; 649 } 650 651 /* Only H.264BP and H.263P3 are considered */ 652 iram_info->buf_dbk_y_use = coda_iram_alloc(iram_info, w64); 653 iram_info->buf_dbk_c_use = coda_iram_alloc(iram_info, w64); 654 if (!iram_info->buf_dbk_c_use) 655 goto out; 656 iram_info->axi_sram_use |= dbk_bits; 657 658 iram_info->buf_bit_use = coda_iram_alloc(iram_info, w128); 659 if (!iram_info->buf_bit_use) 660 goto out; 661 iram_info->axi_sram_use |= bit_bits; 662 663 iram_info->buf_ip_ac_dc_use = coda_iram_alloc(iram_info, w128); 664 if (!iram_info->buf_ip_ac_dc_use) 665 goto out; 666 iram_info->axi_sram_use |= ip_bits; 667 668 /* OVL and BTP disabled for encoder */ 669 } else if (ctx->inst_type == CODA_INST_DECODER) { 670 struct coda_q_data *q_data_dst; 671 672 q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); 673 mb_width = DIV_ROUND_UP(q_data_dst->width, 16); 674 w128 = mb_width * 128; 675 676 iram_info->buf_dbk_y_use = coda_iram_alloc(iram_info, w128); 677 iram_info->buf_dbk_c_use = coda_iram_alloc(iram_info, w128); 678 if (!iram_info->buf_dbk_c_use) 679 goto out; 680 iram_info->axi_sram_use |= dbk_bits; 681 682 iram_info->buf_bit_use = coda_iram_alloc(iram_info, w128); 683 if (!iram_info->buf_bit_use) 684 goto out; 685 iram_info->axi_sram_use |= bit_bits; 686 687 iram_info->buf_ip_ac_dc_use = coda_iram_alloc(iram_info, w128); 688 if (!iram_info->buf_ip_ac_dc_use) 689 goto out; 690 iram_info->axi_sram_use |= ip_bits; 691 692 /* OVL and BTP unused as there is no VC1 support yet */ 693 } 694 695 out: 696 if (!(iram_info->axi_sram_use & CODA7_USE_HOST_IP_ENABLE)) 697 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev, 698 "IRAM smaller than needed\n"); 699 700 if (dev->devtype->product == CODA_HX4 || 701 dev->devtype->product == CODA_7541) { 702 /* TODO - Enabling these causes picture errors on CODA7541 */ 703 if (ctx->inst_type == CODA_INST_DECODER) { 704 /* fw 1.4.50 */ 705 iram_info->axi_sram_use &= ~(CODA7_USE_HOST_IP_ENABLE | 706 CODA7_USE_IP_ENABLE); 707 } else { 708 /* fw 13.4.29 */ 709 iram_info->axi_sram_use &= ~(CODA7_USE_HOST_IP_ENABLE | 710 CODA7_USE_HOST_DBK_ENABLE | 711 CODA7_USE_IP_ENABLE | 712 CODA7_USE_DBK_ENABLE); 713 } 714 } 715 } 716 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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