kernel/linux.git/drivers/gpu/drm/i915/display, branch v5.10.263

drm/i915/dp: Fix VSC dynamic range signaling for RGB formats

2026-06-01T15:29:48+00:00

commit 1ae15b6c7965d137eef21f2cc7d367b29cb88369 upstream. For RGB, set dynamic_range to CTA or VESA based on crtc_state->limited_color_range so sinks apply correct quantization. YCbCr remains limited (CTA) range. (DP v1.4, Table 5-1) v2: - Added Reported-by and Tested-by tags v3: - Add back YCbCr comment(Suraj) Cc: stable@vger.kernel.org #v5.8+ Reported-by: DeepChirp Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/15874 Tested-by: DeepChirp Fixes: 9799c4c3b76e ("drm/i915/dp: Add compute routine for DP VSC SDP") Assisted-by: GitHub-Copilot:GPT-5.4 Signed-off-by: Chaitanya Kumar Borah Reviewed-by: Suraj Kandpal Signed-off-by: Suraj Kandpal Link: https://patch.msgid.link/20260505090920.2479112-1-chaitanya.kumar.borah@intel.com (cherry picked from commit 38e10ddae6f8d42a2e8437fcd25a1cac51106c64) Signed-off-by: Tvrtko Ursulin Signed-off-by: Greg Kroah-Hartman

drm/i915/gmbus: fix spurious timeout on 512-byte burst reads

2026-04-18T08:31:06+00:00

[ Upstream commit 08441f10f4dc09fdeb64529953ac308abc79dd38 ] When reading exactly 512 bytes with burst read enabled, the extra_byte_added path breaks out of the inner do-while without decrementing len. The outer while(len) then re-enters and gmbus_wait() times out since all data has been delivered. Decrement len before the break so the outer loop terminates correctly. Fixes: d5dc0f43f268 ("drm/i915/gmbus: Enable burst read") Signed-off-by: Samasth Norway Ananda Reviewed-by: Jani Nikula Link: https://patch.msgid.link/20260316231920.135438-2-samasth.norway.ananda@oracle.com Signed-off-by: Jani Nikula (cherry picked from commit 4ab0f09ee73fc853d00466682635f67c531f909c) Signed-off-by: Joonas Lahtinen Signed-off-by: Sasha Levin

drm/i915/acpi: free _DSM package when no connectors

2026-03-04T12:19:48+00:00

[ Upstream commit 57b85fd53fccfdf14ce7b36d919c31aa752255f8 ] acpi_evaluate_dsm_typed() returns an ACPI package in pkg. When pkg->package.count == 0, we returned without freeing pkg, leaking memory. Free pkg before returning on the empty case. Signed-off-by: Kaushlendra Kumar Fixes: 337d7a1621c7 ("drm/i915: Fix invalid access to ACPI _DSM objects") Reviewed-by: Jani Nikula Link: https://patch.msgid.link/20260109032549.1826303-1-kaushlendra.kumar@intel.com Signed-off-by: Jani Nikula (cherry picked from commit c0a27a0ca8a34e96d08bb05a2c5d5ccf63fb8dc0) Signed-off-by: Joonas Lahtinen Signed-off-by: Sasha Levin

drm/i915/power: fix size for for_each_set_bit() in abox iteration

2025-10-02T11:35:40+00:00

[ Upstream commit cfa7b7659757f8d0fc4914429efa90d0d2577dd7 ] for_each_set_bit() expects size to be in bits, not bytes. The abox mask iteration uses bytes, but it works by coincidence, because the local variable holding the mask is unsigned long, and the mask only ever has bit 2 as the highest bit. Using a smaller type could lead to subtle and very hard to track bugs. Fixes: 62afef2811e4 ("drm/i915/rkl: RKL uses ABOX0 for pixel transfers") Cc: Ville Syrjälä Cc: Matt Roper Cc: stable@vger.kernel.org # v5.9+ Reviewed-by: Matt Roper Link: https://lore.kernel.org/r/20250905104149.1144751-1-jani.nikula@intel.com Signed-off-by: Jani Nikula (cherry picked from commit 7ea3baa6efe4bb93d11e1c0e6528b1468d7debf6) Signed-off-by: Tvrtko Ursulin [ adapted struct intel_display *display parameters to struct drm_i915_private *dev_priv ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

drm/i915/dp: Fix passing the correct DPCD_REV for drm_dp_set_phy_test_pattern

2024-01-15T17:48:03+00:00

[ Upstream commit 2bd7a06a1208aaacb4e7a2a5436c23bce8d70801 ] Using link_status to get DPCD_REV fails when disabling/defaulting phy pattern. Use intel_dp->dpcd to access DPCD_REV correctly. Fixes: 8cdf72711928 ("drm/i915/dp: Program vswing, pre-emphasis, test-pattern") Cc: Jani Nikula Cc: Imre Deak Cc: Lee Shawn C Signed-off-by: Khaled Almahallawy Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20231213211542.3585105-3-khaled.almahallawy@intel.com (cherry picked from commit 3ee302ec22d6e1d7d1e6d381b0d507ee80f2135c) Signed-off-by: Sasha Levin

drm/i915/gen11+: Only load DRAM information from pcode

2023-06-21T13:45:41+00:00

[ Upstream commit 5d0c938ec9cc96fc7b8abcff0ca8b2a084e9c90c ] Up to now we were reading some DRAM information from MCHBAR register and from pcode what is already not good but some GEN12(TGL-H and ADL-S) platforms have MCHBAR DRAM information in different offsets. This was notified to HW team that decided that the best alternative is always apply the 16gb_dimm watermark adjustment for GEN12+ platforms and read the remaning DRAM information needed to other display programming from pcode. So here moving the DRAM pcode function to intel_dram.c, removing the duplicated fields from intel_qgv_info, setting and using information from dram_info. v2: - bring back num_points to intel_qgv_info as num_qgv_point can be overwritten in icl_get_qgv_points() - add gen12_get_dram_info() and simplify gen11_get_dram_info() Reviewed-by: Lucas De Marchi Signed-off-by: José Roberto de Souza Link: https://patchwork.freedesktop.org/patch/msgid/20210128164312.91160-2-jose.souza@intel.com Signed-off-by: Henning Schild Signed-off-by: Greg Kroah-Hartman

drm/i915/dp: prevent potential div-by-zero

2023-05-30T11:57:46+00:00

[ Upstream commit 0ff80028e2702c7c3d78b69705dc47c1ccba8c39 ] drm_dp_dsc_sink_max_slice_count() may return 0 if something goes wrong on the part of the DSC sink and its DPCD register. This null value may be later used as a divisor in intel_dsc_compute_params(), which will lead to an error. In the unlikely event that this issue occurs, fix it by testing the return value of drm_dp_dsc_sink_max_slice_count() against zero. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. Fixes: a4a157777c80 ("drm/i915/dp: Compute DSC pipe config in atomic check") Signed-off-by: Nikita Zhandarovich Reviewed-by: Rodrigo Vivi Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20230418140430.69902-1-n.zhandarovich@fintech.ru (cherry picked from commit 51f7008239de011370c5067bbba07f0207f06b72) Signed-off-by: Joonas Lahtinen Signed-off-by: Sasha Levin

drm/i915: Make intel_get_crtc_new_encoder() less oopsy

2023-05-17T09:47:45+00:00

[ Upstream commit 631420b06597a33c72b6dcef78d1c2dea17f452d ] The point of the WARN was to print something, not oops straight up. Currently that is precisely what happens if we can't find the connector for the crtc in the atomic state. Get the dev pointer from the atomic state instead of the potentially NULL encoder to avoid that. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230413200602.6037-2-ville.syrjala@linux.intel.com Fixes: 3a47ae201e07 ("drm/i915/display: Make WARN* drm specific where encoder ptr is available") Reviewed-by: Jani Nikula (cherry picked from commit 3b6692357f70498f617ea1b31a0378070a0acf1c) Signed-off-by: Joonas Lahtinen Signed-off-by: Sasha Levin

drm/i915: Preserve crtc_state->inherited during state clearing

2023-04-05T09:23:41+00:00

commit 3a84f2c6c9558c554a90ec26ad25df92fc5e05b7 upstream. intel_crtc_prepare_cleared_state() is unintentionally losing the "inherited" flag. This will happen if intel_initial_commit() is forced to go through the full modeset calculations for whatever reason. Afterwards the first real commit from userspace will not get forced to the full modeset path, and thus eg. audio state may not get recomputed properly. So if the monitor was already enabled during boot audio will not work until userspace itself does an explicit full modeset. Cc: stable@vger.kernel.org Tested-by: Lee Shawn C Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230223152048.20878-1-ville.syrjala@linux.intel.com Reviewed-by: Uma Shankar (cherry picked from commit 2553bacaf953b48c59357f5a622282bc0c45adae) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

drm/i915/quirks: Add inverted backlight quirk for HP 14-r206nv

2023-03-11T15:40:07+00:00

commit 5e438bf7f9a1705ebcae5fa89cdbfbc6932a7871 upstream. This laptop uses inverted backlight PWM. Thus, without this quirk, backlight brightness decreases as the brightness value increases and vice versa. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8013 Cc: stable@vger.kernel.org Signed-off-by: Mavroudis Chatzilaridis Reviewed-by: Jani Nikula Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20230201184947.8835-1-mavchatz@protonmail.com (cherry picked from commit 83e7d6fd330d413cb2064e680ffea91b0512a520) Signed-off-by: Greg Kroah-Hartman