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charset="us-ascii"; Format="flowed" Sender: "linux-phy" X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 10/21/2026 5:23 PM, Krzysztof Kozlowski wrote: > On 21/10/2026 13:16, Nabige Aala wrote: >> On 10/13/2026 2:18 PM, Krzysztof Kozlowski wrote: >>> On Tue, Oct 13, 2026 at 09:44:15AM +0200, Krzysztof Kozlowski wrote: >>>> On Mon, Oct 12, 2026 at 07:02:12PM +0530, Nabige Aala wrote: >>>>> From: Mahadevan P >>>>> >>>>> Nord uses MDSS 12.1 with two independent DP controller instances, >>>>> each exposing two DP cores at new IO offsets. None of the existing >>>>> compatibles match this layout, so add qcom,nord-dp. >>>>> >>>>> Signed-off-by: Mahadevan P >>>>> Signed-off-by: Nabige Aala >>>> Do I understand correctly: >>>> Device is fully compatible with qcom,sa8775p-dp, but a simple to fix >>>> driver limitation is preventing compatibility? >>>> >>>> If so, let's fix the driver - just add more addresses to the >>>> msm_dp_desc_sa8775p array? >>> Or it does not matter, because top-level MDSS anyway cannot use >>> compatibility? >> For MDSS0, the DP register offsets are same to those used on SA8775P. >> However, the MDSS1 DP register offsets differ from SA8775P, and Nord >> also utilizes a different MDSS instance. Because of these differences, >> we introduced a separate compatible string for Nord. >> >> Are you suggesting that Nord should reuse the "msm_dp_desc_sa8775p"? >> This would also pollute the sa8775p's desc table. > What are the differences? Only registers, so no pollution. You just need > them to match IDs. Yes, only registers are changed. Okay, I'll update the SA8775P descriptor table to also support Nord and drop the "qcom,nord-dp" compatible string change. > > Best regards, > Krzysztof -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy