From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC19C289811; Thu, 27 Nov 2025 14:57:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764255447; cv=none; b=k4/GIysSuPz3I6M1tDEBG3f8mHvqSs0bT8LP+W2wlbGRFdUwhuezL0AE5XeLlN+mh/vmyWRCcOc4eq0e+4FXS821zevre6r9KOuLBNvpXLUEUjU1+aAPhoLzuljjMETdITmbJkj3kuypZ+KoVXh1lgrahg0+NWT6Gev+a5+FFEQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764255447; c=relaxed/simple; bh=h4Vjgoc1CTHv9BJjQFfT0X03Vxr9Ne8qIt+PD3+zs9E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YEsDBpBnuNhyEd91ewI6GPMi8NtAQa4fiiRgrb9WDIaEQLjUUsFEWay0t6PWSjTm8s224xJRo03d8lrYbrLaN09pH034Mn/5bDeFHx3z/OrBU316Ue5COUDxNjAp1C4BKKZ9Hh27Hsi7Pqc1VN16HJbna+YwD5MekgAZbMcOuWY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r8GrQU7Q; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r8GrQU7Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CB6BC113D0; Thu, 27 Nov 2025 14:57:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764255447; bh=h4Vjgoc1CTHv9BJjQFfT0X03Vxr9Ne8qIt+PD3+zs9E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r8GrQU7QRtJyWSu/2jhnD23rRcF26WG8gZNly9FYDN5UWMFQI8NixrxCdwQkoVgkY 3UDH0nKNzr/PUOQtGOHq9J12WySPhJfhpV2VLZlkx0gTpEEm9kOebPeVAB/P/UVJKy 95egyWPOIjQJwGBwoXNRxO9E2bNXmNGFQP5oyQ5Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hansen Dsouza , Charlene Liu , Ray Wu , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.12 110/112] drm/amd/display: disable DPP RCG before DPP CLK enable Date: Thu, 27 Nov 2025 15:46:52 +0100 Message-ID: <20251127144036.878056262@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251127144032.705323598@linuxfoundation.org> References: <20251127144032.705323598@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Charlene Liu [ Upstream commit 1bcd679209420305a86833bc357d50021909edaf ] [why] DPP CLK enable needs to disable DPPCLK RCG first. The DPPCLK_en in dccg should always be enabled when the corresponding pipe is enabled. Reviewed-by: Hansen Dsouza Signed-off-by: Charlene Liu Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Stable-dep-of: cfa0904a35fd ("drm/amd/display: Prevent Gating DTBCLK before It Is Properly Latched") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/dc/dccg/dcn35/dcn35_dccg.c | 38 ++++++++++------ drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 21 +++++--- 2 files changed, 38 insertions(+), 21 deletions(-) --- a/drivers/gpu/drm/amd/display/dc/dccg/dcn35/dcn35_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dccg/dcn35/dcn35_dccg.c @@ -391,6 +391,7 @@ static void dccg35_set_dppclk_rcg(struct struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + if (!dccg->ctx->dc->debug.root_clock_optimization.bits.dpp && enable) return; @@ -411,6 +412,8 @@ static void dccg35_set_dppclk_rcg(struct BREAK_TO_DEBUGGER(); break; } + //DC_LOG_DEBUG("%s: inst(%d) DPPCLK rcg_disable: %d\n", __func__, inst, enable ? 0 : 1); + } static void dccg35_set_dpstreamclk_rcg( @@ -1112,30 +1115,24 @@ static void dcn35_set_dppclk_enable(stru { struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + switch (dpp_inst) { case 0: REG_UPDATE(DPPCLK_CTRL, DPPCLK0_EN, enable); - if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) - REG_UPDATE(DCCG_GATE_DISABLE_CNTL6, DPPCLK0_ROOT_GATE_DISABLE, enable); break; case 1: REG_UPDATE(DPPCLK_CTRL, DPPCLK1_EN, enable); - if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) - REG_UPDATE(DCCG_GATE_DISABLE_CNTL6, DPPCLK1_ROOT_GATE_DISABLE, enable); break; case 2: REG_UPDATE(DPPCLK_CTRL, DPPCLK2_EN, enable); - if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) - REG_UPDATE(DCCG_GATE_DISABLE_CNTL6, DPPCLK2_ROOT_GATE_DISABLE, enable); break; case 3: REG_UPDATE(DPPCLK_CTRL, DPPCLK3_EN, enable); - if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) - REG_UPDATE(DCCG_GATE_DISABLE_CNTL6, DPPCLK3_ROOT_GATE_DISABLE, enable); break; default: break; } + //DC_LOG_DEBUG("%s: dpp_inst(%d) DPPCLK_EN = %d\n", __func__, dpp_inst, enable); } @@ -1163,14 +1160,18 @@ static void dccg35_update_dpp_dto(struct ASSERT(false); phase = 0xff; } + dccg35_set_dppclk_rcg(dccg, dpp_inst, false); REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, DPPCLK0_DTO_PHASE, phase, DPPCLK0_DTO_MODULO, modulo); dcn35_set_dppclk_enable(dccg, dpp_inst, true); - } else + } else { dcn35_set_dppclk_enable(dccg, dpp_inst, false); + /*we have this in hwss: disable_plane*/ + //dccg35_set_dppclk_rcg(dccg, dpp_inst, true); + } dccg->pipe_dppclk_khz[dpp_inst] = req_dppclk; } @@ -1182,6 +1183,7 @@ static void dccg35_set_dppclk_root_clock if (!dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) return; + switch (dpp_inst) { case 0: REG_UPDATE(DCCG_GATE_DISABLE_CNTL6, DPPCLK0_ROOT_GATE_DISABLE, enable); @@ -1198,6 +1200,8 @@ static void dccg35_set_dppclk_root_clock default: break; } + //DC_LOG_DEBUG("%s: dpp_inst(%d) rcg: %d\n", __func__, dpp_inst, enable); + } static void dccg35_get_pixel_rate_div( @@ -1521,28 +1525,30 @@ static void dccg35_set_physymclk_root_cl switch (phy_inst) { case 0: REG_UPDATE(DCCG_GATE_DISABLE_CNTL2, - PHYASYMCLK_ROOT_GATE_DISABLE, enable ? 1 : 0); + PHYASYMCLK_ROOT_GATE_DISABLE, enable ? 0 : 1); break; case 1: REG_UPDATE(DCCG_GATE_DISABLE_CNTL2, - PHYBSYMCLK_ROOT_GATE_DISABLE, enable ? 1 : 0); + PHYBSYMCLK_ROOT_GATE_DISABLE, enable ? 0 : 1); break; case 2: REG_UPDATE(DCCG_GATE_DISABLE_CNTL2, - PHYCSYMCLK_ROOT_GATE_DISABLE, enable ? 1 : 0); + PHYCSYMCLK_ROOT_GATE_DISABLE, enable ? 0 : 1); break; case 3: REG_UPDATE(DCCG_GATE_DISABLE_CNTL2, - PHYDSYMCLK_ROOT_GATE_DISABLE, enable ? 1 : 0); + PHYDSYMCLK_ROOT_GATE_DISABLE, enable ? 0 : 1); break; case 4: REG_UPDATE(DCCG_GATE_DISABLE_CNTL2, - PHYESYMCLK_ROOT_GATE_DISABLE, enable ? 1 : 0); + PHYESYMCLK_ROOT_GATE_DISABLE, enable ? 0 : 1); break; default: BREAK_TO_DEBUGGER(); return; } + //DC_LOG_DEBUG("%s: dpp_inst(%d) PHYESYMCLK_ROOT_GATE_DISABLE:\n", __func__, phy_inst, enable ? 0 : 1); + } static void dccg35_set_physymclk( @@ -1643,6 +1649,8 @@ static void dccg35_dpp_root_clock_contro return; if (clock_on) { + dccg35_set_dppclk_rcg(dccg, dpp_inst, false); + /* turn off the DTO and leave phase/modulo at max */ dcn35_set_dppclk_enable(dccg, dpp_inst, 1); REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, @@ -1654,6 +1662,8 @@ static void dccg35_dpp_root_clock_contro REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, DPPCLK0_DTO_PHASE, 0, DPPCLK0_DTO_MODULO, 1); + /*we have this in hwss: disable_plane*/ + //dccg35_set_dppclk_rcg(dccg, dpp_inst, true); } dccg->dpp_clock_gated[dpp_inst] = !clock_on; --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c @@ -241,11 +241,6 @@ void dcn35_init_hw(struct dc *dc) dc->res_pool->hubbub->funcs->allow_self_refresh_control(dc->res_pool->hubbub, !dc->res_pool->hubbub->ctx->dc->debug.disable_stutter); } - if (res_pool->dccg->funcs->dccg_root_gate_disable_control) { - for (i = 0; i < res_pool->pipe_count; i++) - res_pool->dccg->funcs->dccg_root_gate_disable_control(res_pool->dccg, i, 0); - } - for (i = 0; i < res_pool->audio_count; i++) { struct audio *audio = res_pool->audios[i]; @@ -885,12 +880,18 @@ void dcn35_init_pipes(struct dc *dc, str void dcn35_enable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx, struct dc_state *context) { + struct dpp *dpp = pipe_ctx->plane_res.dpp; + struct dccg *dccg = dc->res_pool->dccg; + + /* enable DCFCLK current DCHUB */ pipe_ctx->plane_res.hubp->funcs->hubp_clk_cntl(pipe_ctx->plane_res.hubp, true); /* initialize HUBP on power up */ pipe_ctx->plane_res.hubp->funcs->hubp_init(pipe_ctx->plane_res.hubp); - + /*make sure DPPCLK is on*/ + dccg->funcs->dccg_root_gate_disable_control(dccg, dpp->inst, true); + dpp->funcs->dpp_dppclk_control(dpp, false, true); /* make sure OPP_PIPE_CLOCK_EN = 1 */ pipe_ctx->stream_res.opp->funcs->opp_pipe_clock_control( pipe_ctx->stream_res.opp, @@ -907,6 +908,7 @@ void dcn35_enable_plane(struct dc *dc, s // Program system aperture settings pipe_ctx->plane_res.hubp->funcs->hubp_set_vm_system_aperture_settings(pipe_ctx->plane_res.hubp, &apt); } + //DC_LOG_DEBUG("%s: dpp_inst(%d) =\n", __func__, dpp->inst); if (!pipe_ctx->top_pipe && pipe_ctx->plane_state @@ -922,6 +924,8 @@ void dcn35_plane_atomic_disable(struct d { struct hubp *hubp = pipe_ctx->plane_res.hubp; struct dpp *dpp = pipe_ctx->plane_res.dpp; + struct dccg *dccg = dc->res_pool->dccg; + dc->hwss.wait_for_mpcc_disconnect(dc, dc->res_pool, pipe_ctx); @@ -939,7 +943,8 @@ void dcn35_plane_atomic_disable(struct d hubp->funcs->hubp_clk_cntl(hubp, false); dpp->funcs->dpp_dppclk_control(dpp, false, false); -/*to do, need to support both case*/ + dccg->funcs->dccg_root_gate_disable_control(dccg, dpp->inst, false); + hubp->power_gated = true; hubp->funcs->hubp_reset(hubp); @@ -951,6 +956,8 @@ void dcn35_plane_atomic_disable(struct d pipe_ctx->top_pipe = NULL; pipe_ctx->bottom_pipe = NULL; pipe_ctx->plane_state = NULL; + //DC_LOG_DEBUG("%s: dpp_inst(%d)=\n", __func__, dpp->inst); + } void dcn35_disable_plane(struct dc *dc, struct dc_state *state, struct pipe_ctx *pipe_ctx)