From patchwork Tue Sep 26 08:23:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398858 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 49257E7D25F for ; Tue, 26 Sep 2023 08:29:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0894010E380; Tue, 26 Sep 2023 08:29:36 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id F387710E375; Tue, 26 Sep 2023 08:29:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695716964; x=1727252964; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=pgEfpcqX1aNMhVpvzMnGwuyielzSqdnpIymNLpk6UkI=; b=N7y5aRX7pqi9kiHml7AHX+3G1IU+Jo0xXh3xsHHidTZvRlmtMHkVLayG qUCgkkPOTLn7QwjVHskj/u7M/dHaK3yGHLfAeZLMi8V4qr/IdxT1JE/AM WBj1Z8X6veN1xu4lZKkuZufwlcmujGgFfabOCaHDlUhIOXasmoPVB1IP9 RqUddMHdbG8fK2xA7hANWnydPsTjNjBzKiW7WzVZ/vYT462800fYDnhYW LJRCJG++HmqG7DViHJo0v7nKkrAokMnW7yZPnQffV3gNK0x3M/eTkSbFc ABEaqrwf6oF5mitc4OxdrobjtjcLp/wAQ90ijZNZ62uUMxLgNYbczVYnc w==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="412431825" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431825" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079057" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079057" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:21 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 1/8] drm/display/dp: Add helper function to get DSC bpp precision Date: Tue, 26 Sep 2023 13:53:24 +0530 Message-Id: <20230926082331.739705-2-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ankit Nautiyal Add helper to get the DSC bits_per_pixel precision for the DP sink. Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal Acked-by: Maxime Ripard --- drivers/gpu/drm/display/drm_dp_helper.c | 27 +++++++++++++++++++++++++ include/drm/display/drm_dp_helper.h | 1 + 2 files changed, 28 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 8a1b64c57dfd..5c23d5b8fc50 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2323,6 +2323,33 @@ int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc, } EXPORT_SYMBOL(drm_dp_read_desc); +/** + * drm_dp_dsc_sink_bpp_incr() - Get bits per pixel increment + * @dsc_dpcd: DSC capabilities from DPCD + * + * Returns the bpp precision supported by the DP sink. + */ +u8 drm_dp_dsc_sink_bpp_incr(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]) +{ + u8 bpp_increment_dpcd = dsc_dpcd[DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT]; + + switch (bpp_increment_dpcd) { + case DP_DSC_BITS_PER_PIXEL_1_16: + return 16; + case DP_DSC_BITS_PER_PIXEL_1_8: + return 8; + case DP_DSC_BITS_PER_PIXEL_1_4: + return 4; + case DP_DSC_BITS_PER_PIXEL_1_2: + return 2; + case DP_DSC_BITS_PER_PIXEL_1_1: + return 1; + } + + return 0; +} +EXPORT_SYMBOL(drm_dp_dsc_sink_bpp_incr); + /** * drm_dp_dsc_sink_max_slice_count() - Get the max slice count * supported by the DSC sink. diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 3369104e2d25..6968d4d87931 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -164,6 +164,7 @@ drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) } /* DP/eDP DSC support */ +u8 drm_dp_dsc_sink_bpp_incr(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]); u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE], bool is_edp); u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]); From patchwork Tue Sep 26 08:23:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398857 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4DE6BE7D25E for ; Tue, 26 Sep 2023 08:29:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1D72B10E37E; Tue, 26 Sep 2023 08:29:35 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2C1A510E379; Tue, 26 Sep 2023 08:29:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695716967; x=1727252967; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=tlnJg68d57KB4zu4gV1ip66JVreXrBD3ESQ0aVe2n5Y=; b=KvlDL4eM/ov5SIgzezNhEyvmT/1dEd6h9NZW6VubU099kGQysIKPvRg1 h8w3kmlpQQgk5jDGbo+HdGkVBaohjYxee49Kms27IHxAVJNOimUNrNtQ5 SboI2zqCh/v3v4EMAfjj5oDs7f4HThcCOJyjzr56BPzvJLxOtxUMh47s/ zPdEgJH9GXfK0iTZBuEbfUsTzWzI0yK67IgtFEJfy2uYpk7ud4m1uZIU2 MKNstTBzgCAuXAMVVVwrl9ScJvhz6snbt/Vp0XJlb+c8P0CN1nSas6pAT Ku2cG5BAB2tTu4oqDFXgqggSUwJK4O3JrGqEeEVgND0vWrq6wNdBQ7yFa Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="412431832" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431832" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079068" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079068" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:23 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 2/8] drm/i915/display: Store compressed bpp in U6.4 format Date: Tue, 26 Sep 2023 13:53:25 +0530 Message-Id: <20230926082331.739705-3-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, Mitul Golani , swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ankit Nautiyal DSC parameter bits_per_pixel is stored in U6.4 format. The 4 bits represent the fractional part of the bpp. Currently we use compressed_bpp member of dsc structure to store only the integral part of the bits_per_pixel. To store the full bits_per_pixel along with the fractional part, compressed_bpp is changed to store bpp in U6.4 formats. Intergral part is retrieved by simply right shifting the member compressed_bpp by 4. v2: -Use to_bpp_int, to_bpp_frac_dec, to_bpp_x16 helpers while dealing with compressed bpp. (Suraj) -Fix comment styling. (Suraj) v3: -Add separate file for 6.4 fixed point helper(Jani, Nikula) -Add comment for magic values(Suraj) v4: Fix checkpatch warnings caused by renaming(Suraj) Signed-off-by: Ankit Nautiyal Signed-off-by: Mitul Golani Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/icl_dsi.c | 11 +++--- drivers/gpu/drm/i915/display/intel_audio.c | 3 +- drivers/gpu/drm/i915/display/intel_bios.c | 6 ++-- drivers/gpu/drm/i915/display/intel_cdclk.c | 6 ++-- drivers/gpu/drm/i915/display/intel_display.c | 2 +- .../drm/i915/display/intel_display_types.h | 3 +- drivers/gpu/drm/i915/display/intel_dp.c | 33 ++++++++++------- drivers/gpu/drm/i915/display/intel_dp_mst.c | 26 ++++++++------ .../i915/display/intel_fractional_helper.h | 36 +++++++++++++++++++ drivers/gpu/drm/i915/display/intel_vdsc.c | 5 +-- 10 files changed, 93 insertions(+), 38 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_fractional_helper.h diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index c4585e445198..77b73bd61076 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -43,6 +43,7 @@ #include "intel_de.h" #include "intel_dsi.h" #include "intel_dsi_vbt.h" +#include "intel_fractional_helper.h" #include "intel_panel.h" #include "intel_vdsc.h" #include "intel_vdsc_regs.h" @@ -330,7 +331,7 @@ static int afe_clk(struct intel_encoder *encoder, int bpp; if (crtc_state->dsc.compression_enable) - bpp = crtc_state->dsc.compressed_bpp; + bpp = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); else bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); @@ -860,7 +861,7 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder, * compressed and non-compressed bpp. */ if (crtc_state->dsc.compression_enable) { - mul = crtc_state->dsc.compressed_bpp; + mul = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); div = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); } @@ -884,7 +885,7 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder, int bpp, line_time_us, byte_clk_period_ns; if (crtc_state->dsc.compression_enable) - bpp = crtc_state->dsc.compressed_bpp; + bpp = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); else bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); @@ -1451,8 +1452,8 @@ static void gen11_dsi_get_timings(struct intel_encoder *encoder, struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; - if (pipe_config->dsc.compressed_bpp) { - int div = pipe_config->dsc.compressed_bpp; + if (pipe_config->dsc.compressed_bpp_x16) { + int div = intel_fractional_bpp_from_x16(pipe_config->dsc.compressed_bpp_x16); int mul = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); adjusted_mode->crtc_htotal = diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c index 19605264a35c..4f1db1581316 100644 --- a/drivers/gpu/drm/i915/display/intel_audio.c +++ b/drivers/gpu/drm/i915/display/intel_audio.c @@ -35,6 +35,7 @@ #include "intel_crtc.h" #include "intel_de.h" #include "intel_display_types.h" +#include "intel_fractional_helper.h" #include "intel_lpe_audio.h" /** @@ -528,7 +529,7 @@ static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder, h_active = crtc_state->hw.adjusted_mode.crtc_hdisplay; h_total = crtc_state->hw.adjusted_mode.crtc_htotal; pixel_clk = crtc_state->hw.adjusted_mode.crtc_clock; - vdsc_bpp = crtc_state->dsc.compressed_bpp; + vdsc_bpp = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); cdclk = i915->display.cdclk.hw.cdclk; /* fec= 0.972261, using rounding multiplier of 1000000 */ fec_coeff = 972261; diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 4e8f1e91bb08..616492a1a7ef 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -33,6 +33,7 @@ #include "i915_reg.h" #include "intel_display.h" #include "intel_display_types.h" +#include "intel_fractional_helper.h" #include "intel_gmbus.h" #define _INTEL_BIOS_PRIVATE @@ -3392,8 +3393,9 @@ static void fill_dsc(struct intel_crtc_state *crtc_state, crtc_state->pipe_bpp = bpc * 3; - crtc_state->dsc.compressed_bpp = min(crtc_state->pipe_bpp, - VBT_DSC_MAX_BPP(dsc->max_bpp)); + crtc_state->dsc.compressed_bpp_x16 = + intel_fractional_bpp_to_x16(min(crtc_state->pipe_bpp, + VBT_DSC_MAX_BPP(dsc->max_bpp))); /* * FIXME: This is ugly, and slice count should take DSC engine diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index b55a3f75f392..31d008ddd014 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -34,6 +34,7 @@ #include "intel_de.h" #include "intel_dp.h" #include "intel_display_types.h" +#include "intel_fractional_helper.h" #include "intel_mchbar_regs.h" #include "intel_pci_config.h" #include "intel_pcode.h" @@ -2598,8 +2599,9 @@ static int intel_vdsc_min_cdclk(const struct intel_crtc_state *crtc_state) * => CDCLK >= compressed_bpp * Pixel clock / 2 * Bigjoiner Interface bits */ int bigjoiner_interface_bits = DISPLAY_VER(i915) > 13 ? 36 : 24; - int min_cdclk_bj = (crtc_state->dsc.compressed_bpp * pixel_clock) / - (2 * bigjoiner_interface_bits); + int min_cdclk_bj = + (intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16) * + pixel_clock) / (2 * bigjoiner_interface_bits); min_cdclk = max(min_cdclk, min_cdclk_bj); } diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index edbcf5968804..a9943505a80b 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -5415,7 +5415,7 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config, PIPE_CONF_CHECK_I(dsc.compression_enable); PIPE_CONF_CHECK_I(dsc.dsc_split); - PIPE_CONF_CHECK_I(dsc.compressed_bpp); + PIPE_CONF_CHECK_I(dsc.compressed_bpp_x16); PIPE_CONF_CHECK_BOOL(splitter.enable); PIPE_CONF_CHECK_I(splitter.link_count); diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 2328f5e66cd8..c691ec2670c3 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1354,7 +1354,8 @@ struct intel_crtc_state { struct { bool compression_enable; bool dsc_split; - u16 compressed_bpp; + /* Compressed Bpp in U6.4 format (first 4 bits for fractional part) */ + u16 compressed_bpp_x16; u8 slice_count; struct drm_dsc_config config; } dsc; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index f16d9fa88fe1..2a7ff3318498 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -64,6 +64,7 @@ #include "intel_dp_mst.h" #include "intel_dpio_phy.h" #include "intel_dpll.h" +#include "intel_fractional_helper.h" #include "intel_fifo_underrun.h" #include "intel_hdcp.h" #include "intel_hdmi.h" @@ -1863,7 +1864,8 @@ icl_dsc_compute_link_config(struct intel_dp *intel_dp, valid_dsc_bpp[i], timeslots); if (ret == 0) { - pipe_config->dsc.compressed_bpp = valid_dsc_bpp[i]; + pipe_config->dsc.compressed_bpp_x16 = + intel_fractional_bpp_to_x16(valid_dsc_bpp[i]); return 0; } } @@ -1901,7 +1903,8 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp, compressed_bpp, timeslots); if (ret == 0) { - pipe_config->dsc.compressed_bpp = compressed_bpp; + pipe_config->dsc.compressed_bpp_x16 = + intel_fractional_bpp_to_x16(compressed_bpp); return 0; } } @@ -2085,7 +2088,8 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp, /* Compressed BPP should be less than the Input DSC bpp */ dsc_max_bpp = min(dsc_max_bpp, pipe_bpp - 1); - pipe_config->dsc.compressed_bpp = max(dsc_min_bpp, dsc_max_bpp); + pipe_config->dsc.compressed_bpp_x16 = + intel_fractional_bpp_to_x16(max(dsc_min_bpp, dsc_max_bpp)); pipe_config->pipe_bpp = pipe_bpp; @@ -2171,18 +2175,19 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp, ret = intel_dp_dsc_compute_params(&dig_port->base, pipe_config); if (ret < 0) { drm_dbg_kms(&dev_priv->drm, - "Cannot compute valid DSC parameters for Input Bpp = %d " - "Compressed BPP = %d\n", + "Cannot compute valid DSC parameters for Input Bpp = %d Compressed BPP = %d.%d\n", pipe_config->pipe_bpp, - pipe_config->dsc.compressed_bpp); + intel_fractional_bpp_from_x16(pipe_config->dsc.compressed_bpp_x16), + intel_fractional_bpp_decimal(pipe_config->dsc.compressed_bpp_x16)); return ret; } pipe_config->dsc.compression_enable = true; - drm_dbg_kms(&dev_priv->drm, "DP DSC computed with Input Bpp = %d " - "Compressed Bpp = %d Slice Count = %d\n", + drm_dbg_kms(&dev_priv->drm, + "DP DSC computed with Input Bpp = %d Compressed Bpp = %d.%d Slice Count = %d\n", pipe_config->pipe_bpp, - pipe_config->dsc.compressed_bpp, + intel_fractional_bpp_from_x16(pipe_config->dsc.compressed_bpp_x16), + intel_fractional_bpp_decimal(pipe_config->dsc.compressed_bpp_x16), pipe_config->dsc.slice_count); return 0; @@ -2261,15 +2266,17 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, if (pipe_config->dsc.compression_enable) { drm_dbg_kms(&i915->drm, - "DP lane count %d clock %d Input bpp %d Compressed bpp %d\n", + "DP lane count %d clock %d Input bpp %d Compressed bpp %d.%d\n", pipe_config->lane_count, pipe_config->port_clock, pipe_config->pipe_bpp, - pipe_config->dsc.compressed_bpp); + intel_fractional_bpp_from_x16(pipe_config->dsc.compressed_bpp_x16), + intel_fractional_bpp_decimal(pipe_config->dsc.compressed_bpp_x16)); drm_dbg_kms(&i915->drm, "DP link rate required %i available %i\n", intel_dp_link_required(adjusted_mode->crtc_clock, - pipe_config->dsc.compressed_bpp), + intel_fractional_bpp_from_x16 + (pipe_config->dsc.compressed_bpp_x16)), intel_dp_max_data_rate(pipe_config->port_clock, pipe_config->lane_count)); } else { @@ -2705,7 +2712,7 @@ intel_dp_compute_config(struct intel_encoder *encoder, drm_dp_enhanced_frame_cap(intel_dp->dpcd); if (pipe_config->dsc.compression_enable) - link_bpp = pipe_config->dsc.compressed_bpp; + link_bpp = pipe_config->dsc.compressed_bpp_x16; else link_bpp = intel_dp_output_bpp(pipe_config->output_format, pipe_config->pipe_bpp); diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index ff3accebf0a8..64e1a8cba3d8 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -41,6 +41,7 @@ #include "intel_dp_hdcp.h" #include "intel_dp_mst.h" #include "intel_dpio_phy.h" +#include "intel_fractional_helper.h" #include "intel_hdcp.h" #include "intel_hotplug.h" #include "skl_scaler.h" @@ -140,7 +141,7 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, if (!dsc) crtc_state->pipe_bpp = bpp; else - crtc_state->dsc.compressed_bpp = bpp; + crtc_state->dsc.compressed_bpp_x16 = intel_fractional_bpp_to_x16(bpp); drm_dbg_kms(&i915->drm, "Got %d slots for pipe bpp %d dsc %d\n", slots, bpp, dsc); } @@ -238,13 +239,14 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder, if (slots < 0) return slots; - last_compressed_bpp = crtc_state->dsc.compressed_bpp; + last_compressed_bpp = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); - crtc_state->dsc.compressed_bpp = intel_dp_dsc_nearest_valid_bpp(i915, - last_compressed_bpp, - crtc_state->pipe_bpp); + crtc_state->dsc.compressed_bpp_x16 = + intel_fractional_bpp_to_x16(intel_dp_dsc_nearest_valid_bpp(i915, + last_compressed_bpp, + crtc_state->pipe_bpp)); - if (crtc_state->dsc.compressed_bpp != last_compressed_bpp) + if (crtc_state->dsc.compressed_bpp_x16 != intel_fractional_bpp_to_x16(last_compressed_bpp)) need_timeslot_recalc = true; /* @@ -252,15 +254,17 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder, * the actual compressed bpp we use. */ if (need_timeslot_recalc) { - slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, - crtc_state->dsc.compressed_bpp, - crtc_state->dsc.compressed_bpp, - limits, conn_state, 2 * 3, true); + slots = + intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, + intel_fractional_bpp_from_x16 + (crtc_state->dsc.compressed_bpp_x16), + intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16), + limits, conn_state, 2 * 3, true); if (slots < 0) return slots; } - intel_link_compute_m_n(crtc_state->dsc.compressed_bpp, + intel_link_compute_m_n(intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16), crtc_state->lane_count, adjusted_mode->crtc_clock, crtc_state->port_clock, diff --git a/drivers/gpu/drm/i915/display/intel_fractional_helper.h b/drivers/gpu/drm/i915/display/intel_fractional_helper.h new file mode 100644 index 000000000000..0212a9041c8f --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_fractional_helper.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 Intel Corporation + */ +#ifndef __INTEL_FRACTIONAL_HELPERS_H__ +#define __INTEL_FRACTIONAL_HELPERS_H__ + + /* + * Convert a U6.4 fixed-point bits-per-pixel (bpp) value to an integer bpp value. + */ +static inline int intel_fractional_bpp_from_x16(int bpp_x16) +{ + return bpp_x16 >> 4; +} + +/* + * Extract the fractional part of a U6.4 fixed-point bpp value based on the + * last 4 bits representing fractional bits, obtained by multiplying by 10000 + * and then dividing by 16, as the bpp value is initially left-shifted by 4 + * to allocate 4 bits for the fractional part. + */ +static inline int intel_fractional_bpp_decimal(int bpp_x16) +{ + return (bpp_x16 & 0xf) * 625; +} + +/* + * Convert bits-per-pixel (bpp) to a U6.4 fixed-point representation. + */ +static inline int intel_fractional_bpp_to_x16(int bpp) +{ + return bpp << 4; +} + +#endif /* __INTEL_FRACTIONAL_HELPERS_H__ */ + diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c index 6757dbae9ee5..142c886f4776 100644 --- a/drivers/gpu/drm/i915/display/intel_vdsc.c +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c @@ -15,6 +15,7 @@ #include "intel_de.h" #include "intel_display_types.h" #include "intel_dsi.h" +#include "intel_fractional_helper.h" #include "intel_qp_tables.h" #include "intel_vdsc.h" #include "intel_vdsc_regs.h" @@ -248,7 +249,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config) struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct drm_dsc_config *vdsc_cfg = &pipe_config->dsc.config; - u16 compressed_bpp = pipe_config->dsc.compressed_bpp; + u16 compressed_bpp = intel_fractional_bpp_from_x16(pipe_config->dsc.compressed_bpp_x16); int err; int ret; @@ -874,7 +875,7 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state) if (vdsc_cfg->native_420) vdsc_cfg->bits_per_pixel >>= 1; - crtc_state->dsc.compressed_bpp = vdsc_cfg->bits_per_pixel >> 4; + crtc_state->dsc.compressed_bpp_x16 = vdsc_cfg->bits_per_pixel; /* PPS 2 */ pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 2); From patchwork Tue Sep 26 08:23:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398856 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 57A89E7D263 for ; 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a="412431845" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431845" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079084" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079084" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:27 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 3/8] drm/i915/display: Consider fractional vdsc bpp while computing m_n values Date: Tue, 26 Sep 2023 13:53:26 +0530 Message-Id: <20230926082331.739705-4-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, Mitul Golani , swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ankit Nautiyal MTL+ supports fractional compressed bits_per_pixel, with precision of 1/16. This compressed bpp is stored in U6.4 format. Accommodate this precision while computing m_n values. v1: Replace the computation of 'data_clock' with 'data_clock = DIV_ROUND_UP(data_clock, 16).' (Sui Jingfeng). Signed-off-by: Ankit Nautiyal Signed-off-by: Mitul Golani Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_display.c | 6 +++++- drivers/gpu/drm/i915/display/intel_display.h | 2 +- drivers/gpu/drm/i915/display/intel_dp.c | 5 +++-- drivers/gpu/drm/i915/display/intel_dp_mst.c | 6 ++++-- drivers/gpu/drm/i915/display/intel_fdi.c | 2 +- 5 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index a9943505a80b..283e8dfa6dec 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2396,10 +2396,14 @@ void intel_link_compute_m_n(u16 bits_per_pixel, int nlanes, int pixel_clock, int link_clock, struct intel_link_m_n *m_n, - bool fec_enable) + bool fec_enable, + bool is_dsc_fractional_bpp) { u32 data_clock = bits_per_pixel * pixel_clock; + if (is_dsc_fractional_bpp) + data_clock = DIV_ROUND_UP(data_clock, 16); + if (fec_enable) data_clock = intel_dp_mode_to_fec_clock(data_clock); diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h index 49ac8473b988..a4c4ca3cad65 100644 --- a/drivers/gpu/drm/i915/display/intel_display.h +++ b/drivers/gpu/drm/i915/display/intel_display.h @@ -398,7 +398,7 @@ u8 intel_calc_active_pipes(struct intel_atomic_state *state, void intel_link_compute_m_n(u16 bpp, int nlanes, int pixel_clock, int link_clock, struct intel_link_m_n *m_n, - bool fec_enable); + bool fec_enable, bool is_dsc_fractional_bpp); u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv, u32 pixel_format, u64 modifier); enum drm_mode_status diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 2a7ff3318498..fc72590f93c6 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2562,7 +2562,7 @@ intel_dp_drrs_compute_config(struct intel_connector *connector, intel_link_compute_m_n(link_bpp, pipe_config->lane_count, pixel_clock, pipe_config->port_clock, &pipe_config->dp_m2_n2, - pipe_config->fec_enable); + pipe_config->fec_enable, false); /* FIXME: abstract this better */ if (pipe_config->splitter.enable) @@ -2744,7 +2744,8 @@ intel_dp_compute_config(struct intel_encoder *encoder, adjusted_mode->crtc_clock, pipe_config->port_clock, &pipe_config->dp_m_n, - pipe_config->fec_enable); + pipe_config->fec_enable, + pipe_config->dsc.compression_enable); /* FIXME: abstract this better */ if (pipe_config->splitter.enable) diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 64e1a8cba3d8..2d8a2a45f8fe 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -172,7 +172,8 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, adjusted_mode->crtc_clock, crtc_state->port_clock, &crtc_state->dp_m_n, - crtc_state->fec_enable); + crtc_state->fec_enable, + false); crtc_state->dp_m_n.tu = slots; return 0; @@ -269,7 +270,8 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder, adjusted_mode->crtc_clock, crtc_state->port_clock, &crtc_state->dp_m_n, - crtc_state->fec_enable); + crtc_state->fec_enable, + crtc_state->dsc.compression_enable); crtc_state->dp_m_n.tu = slots; return 0; diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c index 4d7d524c6801..3103ea881059 100644 --- a/drivers/gpu/drm/i915/display/intel_fdi.c +++ b/drivers/gpu/drm/i915/display/intel_fdi.c @@ -259,7 +259,7 @@ int ilk_fdi_compute_config(struct intel_crtc *crtc, pipe_config->fdi_lanes = lane; intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock, - link_bw, &pipe_config->fdi_m_n, false); + link_bw, &pipe_config->fdi_m_n, false, false); ret = ilk_check_fdi_lanes(dev, crtc->pipe, pipe_config); if (ret == -EDEADLK) From patchwork Tue Sep 26 08:23:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CA5ECE7D25E for ; 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a="412431854" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431854" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079089" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079089" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:30 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 4/8] drm/i915/audio : Consider fractional vdsc bpp while computing tu_data Date: Tue, 26 Sep 2023 13:53:27 +0530 Message-Id: <20230926082331.739705-5-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ankit Nautiyal MTL+ supports fractional compressed bits_per_pixel, with precision of 1/16. This compressed bpp is stored in U6.4 format. Accommodate the precision during calculation of transfer unit data for hblank_early calculation. v2: -Fixed tu_data calculation while dealing with U6.4 format. (Stan) Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_audio.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c index 4f1db1581316..3b08be54ce4f 100644 --- a/drivers/gpu/drm/i915/display/intel_audio.c +++ b/drivers/gpu/drm/i915/display/intel_audio.c @@ -522,25 +522,25 @@ static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder, unsigned int link_clks_available, link_clks_required; unsigned int tu_data, tu_line, link_clks_active; unsigned int h_active, h_total, hblank_delta, pixel_clk; - unsigned int fec_coeff, cdclk, vdsc_bpp; + unsigned int fec_coeff, cdclk, vdsc_bppx16; unsigned int link_clk, lanes; unsigned int hblank_rise; h_active = crtc_state->hw.adjusted_mode.crtc_hdisplay; h_total = crtc_state->hw.adjusted_mode.crtc_htotal; pixel_clk = crtc_state->hw.adjusted_mode.crtc_clock; - vdsc_bpp = intel_fractional_bpp_from_x16(crtc_state->dsc.compressed_bpp_x16); + vdsc_bppx16 = crtc_state->dsc.compressed_bpp_x16; cdclk = i915->display.cdclk.hw.cdclk; /* fec= 0.972261, using rounding multiplier of 1000000 */ fec_coeff = 972261; link_clk = crtc_state->port_clock; lanes = crtc_state->lane_count; - drm_dbg_kms(&i915->drm, "h_active = %u link_clk = %u :" - "lanes = %u vdsc_bpp = %u cdclk = %u\n", - h_active, link_clk, lanes, vdsc_bpp, cdclk); + drm_dbg_kms(&i915->drm, + "h_active = %u link_clk = %u : lanes = %u vdsc_bppx16 = %u cdclk = %u\n", + h_active, link_clk, lanes, vdsc_bppx16, cdclk); - if (WARN_ON(!link_clk || !pixel_clk || !lanes || !vdsc_bpp || !cdclk)) + if (WARN_ON(!link_clk || !pixel_clk || !lanes || !vdsc_bppx16 || !cdclk)) return 0; link_clks_available = (h_total - h_active) * link_clk / pixel_clk - 28; @@ -552,8 +552,8 @@ static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder, hblank_delta = DIV64_U64_ROUND_UP(mul_u32_u32(5 * (link_clk + cdclk), pixel_clk), mul_u32_u32(link_clk, cdclk)); - tu_data = div64_u64(mul_u32_u32(pixel_clk * vdsc_bpp * 8, 1000000), - mul_u32_u32(link_clk * lanes, fec_coeff)); + tu_data = div64_u64(mul_u32_u32(pixel_clk * vdsc_bppx16 * 8, 1000000), + mul_u32_u32(link_clk * lanes * 16, fec_coeff)); tu_line = div64_u64(h_active * mul_u32_u32(link_clk, fec_coeff), mul_u32_u32(64 * pixel_clk, 1000000)); link_clks_active = (tu_line - 1) * 64 + tu_data; From patchwork Tue Sep 26 08:23:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398860 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A6770E7D261 for ; Tue, 26 Sep 2023 08:29:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9780C10E381; 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26 Sep 2023 01:29:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079099" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079099" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:33 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 5/8] drm/i915/dsc/mtl: Add support for fractional bpp Date: Tue, 26 Sep 2023 13:53:28 +0530 Message-Id: <20230926082331.739705-6-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, swati2.sharma@intel.com, Vandita Kulkarni , mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Vandita Kulkarni Consider the fractional bpp while reading the qp values. v2: Use helpers for fractional, integral bits of bits_per_pixel. (Suraj) Signed-off-by: Vandita Kulkarni Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- .../gpu/drm/i915/display/intel_qp_tables.c | 3 --- drivers/gpu/drm/i915/display/intel_vdsc.c | 25 +++++++++++++++---- 2 files changed, 20 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_qp_tables.c b/drivers/gpu/drm/i915/display/intel_qp_tables.c index 543cdc46aa1d..600c815e37e4 100644 --- a/drivers/gpu/drm/i915/display/intel_qp_tables.c +++ b/drivers/gpu/drm/i915/display/intel_qp_tables.c @@ -34,9 +34,6 @@ * These qp tables are as per the C model * and it has the rows pointing to bpps which increment * in steps of 0.5 - * We do not support fractional bpps as of today, - * hence we would skip the fractional bpps during - * our references for qp calclulations. */ static const u8 rc_range_minqp444_8bpc[DSC_NUM_BUF_RANGES][RC_RANGE_QP444_8BPC_MAX_NUM_BPP] = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c index 142c886f4776..e9f90c2c2ec4 100644 --- a/drivers/gpu/drm/i915/display/intel_vdsc.c +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c @@ -78,8 +78,8 @@ intel_vdsc_set_min_max_qp(struct drm_dsc_config *vdsc_cfg, int buf, static void calculate_rc_params(struct drm_dsc_config *vdsc_cfg) { + int bpp = intel_fractional_bpp_from_x16(vdsc_cfg->bits_per_pixel); int bpc = vdsc_cfg->bits_per_component; - int bpp = vdsc_cfg->bits_per_pixel >> 4; int qp_bpc_modifier = (bpc - 8) * 2; int uncompressed_bpg_rate; int first_line_bpg_offset; @@ -149,7 +149,13 @@ calculate_rc_params(struct drm_dsc_config *vdsc_cfg) static const s8 ofs_und8[] = { 10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10, -10, -12, -12, -12 }; - + /* + * For 420 format since bits_per_pixel (bpp) is set to target bpp * 2, + * QP table values for target bpp 4.0 to 4.4375 (rounded to 4.0) are + * actually for bpp 8 to 8.875 (rounded to 4.0 * 2 i.e 8). + * Similarly values for target bpp 4.5 to 4.8375 (rounded to 4.5) + * are for bpp 9 to 9.875 (rounded to 4.5 * 2 i.e 9), and so on. + */ bpp_i = bpp - 8; for (buf_i = 0; buf_i < DSC_NUM_BUF_RANGES; buf_i++) { u8 range_bpg_offset; @@ -179,6 +185,9 @@ calculate_rc_params(struct drm_dsc_config *vdsc_cfg) range_bpg_offset & DSC_RANGE_BPG_OFFSET_MASK; } } else { + /* fractional bpp part * 10000 (for precision up to 4 decimal places) */ + int fractional_bits = intel_fractional_bpp_decimal(vdsc_cfg->bits_per_pixel); + static const s8 ofs_und6[] = { 0, -2, -2, -4, -6, -6, -8, -8, -8, -10, -10, -12, -12, -12, -12 }; @@ -192,7 +201,14 @@ calculate_rc_params(struct drm_dsc_config *vdsc_cfg) 10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10, -10, -12, -12, -12 }; - bpp_i = (2 * (bpp - 6)); + /* + * QP table rows have values in increment of 0.5. + * So 6.0 bpp to 6.4375 will have index 0, 6.5 to 6.9375 will have index 1, + * and so on. + * 0.5 fractional part with 4 decimal precision becomes 5000 + */ + bpp_i = ((bpp - 6) + (fractional_bits < 5000 ? 0 : 1)); + for (buf_i = 0; buf_i < DSC_NUM_BUF_RANGES; buf_i++) { u8 range_bpg_offset; @@ -280,8 +296,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config) /* Gen 11 does not support VBR */ vdsc_cfg->vbr_enable = false; - /* Gen 11 only supports integral values of bpp */ - vdsc_cfg->bits_per_pixel = compressed_bpp << 4; + vdsc_cfg->bits_per_pixel = pipe_config->dsc.compressed_bpp_x16; /* * According to DSC 1.2 specs in Section 4.1 if native_420 is set From patchwork Tue Sep 26 08:23:29 2023 Content-Type: text/plain; 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26 Sep 2023 01:29:35 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 6/8] drm/i915/dp: Iterate over output bpp with fractional step size Date: Tue, 26 Sep 2023 13:53:29 +0530 Message-Id: <20230926082331.739705-7-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ankit Nautiyal This patch adds support to iterate over compressed output bpp as per the fractional step, supported by DP sink. v2: -Avoid ending up with compressed bpp, same as pipe bpp. (Stan) Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp.c | 38 +++++++++++++++---------- 1 file changed, 23 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index fc72590f93c6..6f4a25d024e9 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1716,15 +1716,15 @@ static bool intel_dp_dsc_supports_format(struct intel_dp *intel_dp, return drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd, sink_dsc_format); } -static bool is_bw_sufficient_for_dsc_config(u16 compressed_bpp, u32 link_clock, +static bool is_bw_sufficient_for_dsc_config(u16 compressed_bppx16, u32 link_clock, u32 lane_count, u32 mode_clock, enum intel_output_format output_format, int timeslots) { u32 available_bw, required_bw; - available_bw = (link_clock * lane_count * timeslots) / 8; - required_bw = compressed_bpp * (intel_dp_mode_to_fec_clock(mode_clock)); + available_bw = (link_clock * lane_count * timeslots * 16) / 8; + required_bw = compressed_bppx16 * (intel_dp_mode_to_fec_clock(mode_clock)); return available_bw > required_bw; } @@ -1732,7 +1732,7 @@ static bool is_bw_sufficient_for_dsc_config(u16 compressed_bpp, u32 link_clock, static int dsc_compute_link_config(struct intel_dp *intel_dp, struct intel_crtc_state *pipe_config, struct link_config_limits *limits, - u16 compressed_bpp, + u16 compressed_bppx16, int timeslots) { const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; @@ -1747,8 +1747,8 @@ static int dsc_compute_link_config(struct intel_dp *intel_dp, for (lane_count = limits->min_lane_count; lane_count <= limits->max_lane_count; lane_count <<= 1) { - if (!is_bw_sufficient_for_dsc_config(compressed_bpp, link_rate, lane_count, - adjusted_mode->clock, + if (!is_bw_sufficient_for_dsc_config(compressed_bppx16, link_rate, + lane_count, adjusted_mode->clock, pipe_config->output_format, timeslots)) continue; @@ -1861,7 +1861,7 @@ icl_dsc_compute_link_config(struct intel_dp *intel_dp, ret = dsc_compute_link_config(intel_dp, pipe_config, limits, - valid_dsc_bpp[i], + valid_dsc_bpp[i] << 4, timeslots); if (ret == 0) { pipe_config->dsc.compressed_bpp_x16 = @@ -1888,23 +1888,31 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp, int pipe_bpp, int timeslots) { - u16 compressed_bpp; + u8 bppx16_incr = drm_dp_dsc_sink_bpp_incr(intel_dp->dsc_dpcd); + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + u16 compressed_bppx16; + u8 bppx16_step; int ret; + if (DISPLAY_VER(i915) < 14 || bppx16_incr <= 1) + bppx16_step = 16; + else + bppx16_step = 16 / bppx16_incr; + /* Compressed BPP should be less than the Input DSC bpp */ - dsc_max_bpp = min(dsc_max_bpp, pipe_bpp - 1); + dsc_max_bpp = min(dsc_max_bpp << 4, (pipe_bpp << 4) - bppx16_step); + dsc_min_bpp = dsc_min_bpp << 4; - for (compressed_bpp = dsc_max_bpp; - compressed_bpp >= dsc_min_bpp; - compressed_bpp--) { + for (compressed_bppx16 = dsc_max_bpp; + compressed_bppx16 >= dsc_min_bpp; + compressed_bppx16 -= bppx16_step) { ret = dsc_compute_link_config(intel_dp, pipe_config, limits, - compressed_bpp, + compressed_bppx16, timeslots); if (ret == 0) { - pipe_config->dsc.compressed_bpp_x16 = - intel_fractional_bpp_to_x16(compressed_bpp); + pipe_config->dsc.compressed_bpp_x16 = compressed_bppx16; return 0; } } From patchwork Tue Sep 26 08:23:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398863 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C2676E7D25E for ; 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a="412431892" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431892" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079115" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079115" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:38 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 7/8] drm/i915/dsc: Add debugfs entry to validate DSC fractional bpp Date: Tue, 26 Sep 2023 13:53:30 +0530 Message-Id: <20230926082331.739705-8-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, Mitul Golani , swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Swati Sharma DSC_Sink_BPP_Precision entry is added to i915_dsc_fec_support_show to depict sink's precision. Also, new debugfs entry is created to enforce fractional bpp. If Force_DSC_Fractional_BPP_en is set then while iterating over output bpp with fractional step size we will continue if output_bpp is computed as integer. With this approach, we will be able to validate DSC with fractional bpp. v2: Add drm_modeset_unlock to new line(Suraj) Signed-off-by: Swati Sharma Signed-off-by: Ankit Nautiyal Signed-off-by: Mitul Golani Reviewed-by: Suraj Kandpal --- .../drm/i915/display/intel_display_debugfs.c | 84 +++++++++++++++++++ .../drm/i915/display/intel_display_types.h | 1 + 2 files changed, 85 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index f05b52381a83..8de41c820eed 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1244,6 +1244,8 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data) DP_DSC_YCbCr420_Native)), str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd, DP_DSC_YCbCr444))); + seq_printf(m, "DSC_Sink_BPP_Precision: %d\n", + drm_dp_dsc_sink_bpp_incr(intel_dp->dsc_dpcd)); seq_printf(m, "Force_DSC_Enable: %s\n", str_yes_no(intel_dp->force_dsc_en)); if (!intel_dp_is_edp(intel_dp)) @@ -1436,6 +1438,85 @@ static const struct file_operations i915_dsc_output_format_fops = { .write = i915_dsc_output_format_write }; +static int i915_dsc_fractional_bpp_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc; + struct intel_dp *intel_dp; + struct intel_connector *intel_connector = to_intel_connector(connector); + struct intel_encoder *encoder = intel_attached_encoder(intel_connector); + int ret; + + if (!encoder) + return -ENODEV; + + ret = drm_modeset_lock_single_interruptible(&dev->mode_config.connection_mutex); + if (ret) + return ret; + + crtc = connector->state->crtc; + if (connector->status != connector_status_connected || !crtc) { + ret = -ENODEV; + goto out; + } + + intel_dp = intel_attached_dp(intel_connector); + seq_printf(m, "Force_DSC_Fractional_BPP_Enable: %s\n", + str_yes_no(intel_dp->force_dsc_fractional_bpp_en)); + +out: + drm_modeset_unlock(&dev->mode_config.connection_mutex); + + return ret; +} + +static ssize_t i915_dsc_fractional_bpp_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct drm_connector *connector = + ((struct seq_file *)file->private_data)->private; + struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector)); + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + bool dsc_fractional_bpp_enable = false; + int ret; + + if (len == 0) + return 0; + + drm_dbg(&i915->drm, + "Copied %zu bytes from user to force fractional bpp for DSC\n", len); + + ret = kstrtobool_from_user(ubuf, len, &dsc_fractional_bpp_enable); + if (ret < 0) + return ret; + + drm_dbg(&i915->drm, "Got %s for DSC Fractional BPP Enable\n", + (dsc_fractional_bpp_enable) ? "true" : "false"); + intel_dp->force_dsc_fractional_bpp_en = dsc_fractional_bpp_enable; + + *offp += len; + + return len; +} + +static int i915_dsc_fractional_bpp_open(struct inode *inode, + struct file *file) +{ + return single_open(file, i915_dsc_fractional_bpp_show, inode->i_private); +} + +static const struct file_operations i915_dsc_fractional_bpp_fops = { + .owner = THIS_MODULE, + .open = i915_dsc_fractional_bpp_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = i915_dsc_fractional_bpp_write +}; + /* * Returns the Current CRTC's bpc. * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc @@ -1513,6 +1594,9 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector) debugfs_create_file("i915_dsc_output_format", 0644, root, connector, &i915_dsc_output_format_fops); + + debugfs_create_file("i915_dsc_fractional_bpp", 0644, root, + connector, &i915_dsc_fractional_bpp_fops); } if (connector->connector_type == DRM_MODE_CONNECTOR_DSI || diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index c691ec2670c3..e0fe283900a5 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1804,6 +1804,7 @@ struct intel_dp { /* Display stream compression testing */ bool force_dsc_en; int force_dsc_output_format; + bool force_dsc_fractional_bpp_en; int force_dsc_bpc; bool hobl_failed; From patchwork Tue Sep 26 08:23:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398862 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A4E68E7D25F for ; Tue, 26 Sep 2023 08:29:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D9C7410E38D; Tue, 26 Sep 2023 08:29:58 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3F94C10E386; Tue, 26 Sep 2023 08:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695716984; x=1727252984; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4vHYRwZ09GiHhxzwF9IK7MbyNEEgKFT+eO25JutNun8=; b=KDov4/hdhvxvZMickGN5uSOZeXLOmqdPzpmXO3ZASfqGTmwq+VMDyj/f RW/u6lflLy9QUafEDsKWt4+dEPjCVUfJP/ZNVQ8NZyUl1UaP1NnoMXOAE gxNWwUWxkqwQVVcOdSpzQ3YSSVypVk4/L4gEvJSzJN1SfU3OuHs5jx5Hy CjyMd2o8PUiVcRtuxqeb0tvohikBor7ed2wl/iBYb/eBMAiSyE6YTsCl8 zouIdAk6pUUkY+ZHZftlL5WpdPa+5VAirNYkWNM1Es76UGKRgFIlnYYnZ sgMmYTa+MFkTBzzFhqcX2ExyKTbJgoRMjLUTicB6eCO0YBCtPMW8cJJAg g==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="412431914" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431914" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079134" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079134" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:41 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 8/8] drm/i915/dsc: Allow DSC only with fractional bpp when forced from debugfs Date: Tue, 26 Sep 2023 13:53:31 +0530 Message-Id: <20230926082331.739705-9-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Swati Sharma If force_dsc_fractional_bpp_en is set through debugfs allow DSC iff compressed bpp is fractional. Continue if the computed compressed bpp turns out to be a integer. v2: -Use helpers for fractional, integral bits of bits_per_pixel. (Suraj) -Fix comment (Suraj) Signed-off-by: Swati Sharma Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 6f4a25d024e9..169d84130e4a 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1906,6 +1906,9 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp, for (compressed_bppx16 = dsc_max_bpp; compressed_bppx16 >= dsc_min_bpp; compressed_bppx16 -= bppx16_step) { + if (intel_dp->force_dsc_fractional_bpp_en && + !intel_fractional_bpp_decimal(compressed_bppx16)) + continue; ret = dsc_compute_link_config(intel_dp, pipe_config, limits, @@ -1913,6 +1916,10 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp, timeslots); if (ret == 0) { pipe_config->dsc.compressed_bpp_x16 = compressed_bppx16; + if (intel_dp->force_dsc_fractional_bpp_en && + intel_fractional_bpp_decimal(compressed_bppx16)) + drm_dbg_kms(&i915->drm, "Forcing DSC fractional bpp\n"); + return 0; } }