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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi, SUSE received a bug report: https://bugzilla.suse.com/show_bug.cgi?id=1271175 get_ss_info_from_atombios() crashes in 7.1.2. calc_pll_cs->ctx (dc_context) is NULL while trying to log by the first DC_LOG_SYNC() in get_ss_info_from_atombios(): if (as_signal == AS_SIGNAL_TYPE_HDMI && ss_info_cur->spread_spectrum_percentage > 6){ /* invalid input, do nothing */ DC_LOG_SYNC( "Invalid SS percentage "); DC_LOG_SYNC( "for HDMI in ATOMBIOS info Table!!!\n"); continue; } Note dce110_clk_src_construct() calls: -> ss_info_from_atombios_create() -> get_ss_info_from_atombios() <- uses calc_pll_cs->ctx -> calc_pll_max_vco_construct() <- sets calc_pll_cs->ctx AFAICT calc_pll_cs->ctx should not be used in the former, or something. This was likely introduced by: commit 1296423bf23c7a58133970e223b1f47ec6570308 Author: Bhawanpreet Lakha Date: Tue Feb 20 17:42:50 2018 -0500 drm/amd/display: define DC_LOGGER for logger Before the commit, clk_src->base.ctx->logger was used in get_ss_info_from_atombios(). The commit unified all users to use: clk_src->ctx->logger The former is set at the beginning of dce110_clk_src_construct() (before the crash location). The latter only in calc_pll_max_vco_construct() (after the crash location). Any ideas how to fix this? Redefine DC_LOGGER to clk_src->base in get_ss_info_from_atombios()? I'm not sure if this is a regression and there is some underlying issue provoking the "Invalid SS percentage" dump -- asked in the bug and waiting for a reply. thanks, -- js suse labs