Re: [PATCH v3 2/6] drm/i915/alpm: Move alpm related code to a new file
Hi Animesh, kernel test robot noticed the following build errors: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm/drm-next drm-exynos/exynos-drm-next next-20240424] [cannot apply to drm-intel/for-linux-next-fixes linus/master v6.9-rc5] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Animesh-Manna/drm-i915-alpm-Move-alpm-parameters-from-intel_psr/20240425-025652 base: git://anongit.freedesktop.org/drm-intel for-linux-next patch link: https://lore.kernel.org/r/20240424183820.3591593-3-animesh.manna%40intel.com patch subject: [PATCH v3 2/6] drm/i915/alpm: Move alpm related code to a new file config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20240426/202404261542.p0fckhhm-...@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240426/202404261542.p0fckhhm-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202404261542.p0fckhhm-...@intel.com/ All errors (new ones prefixed by >>, old ones prefixed by <<): WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mtd/maps/map_funcs.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spmi/hisi-spmi-controller.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spmi/spmi-pmic-arb.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio_cif.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio_aec.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio_netx.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio_pruss.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio_mf624.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pcmcia/pcmcia_rsrc.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pcmcia/yenta_socket.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pcmcia/i82092.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/hwmon/corsair-cpro.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/hwmon/mr75203.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/vhost/vringh.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/greybus/greybus.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/greybus/gb-es2.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rpmsg/rpmsg_char.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/iio/adc/ingenic-adc.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/iio/adc/xilinx-ams.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/iio/buffer/kfifo_buf.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-core.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-hub.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-aspeed.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-gpio.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-ast-cf.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-scom.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/siox/siox-bus-gpio.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/counter/ftm-quaddec.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/core/snd-pcm-dmaengine.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/core/sound_kunit.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/drivers/snd-pcmtest.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/pci/hda/snd-hda-cirrus-scodec-test.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/soc-topology-test.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/codecs/snd-soc-ab8500-codec.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/codecs/snd-soc-sigmadsp.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/codecs/snd-soc-wm-adsp.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/fsl/imx-pcm-dma.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/intel/avs/boards/snd-soc-avs-da7219.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/intel/avs/boards/snd-soc-avs-dmic.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/intel/avs/boards/snd-soc-avs-i2s-test.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/intel/avs/boards/snd-soc-avs-max98927.o WARNING: modpost: missing MODULE_DESCRIPTION() in sound/soc/intel/avs/boards/snd-soc-avs-max98357a.o WAR
[PATCH v3 2/6] drm/i915/alpm: Move alpm related code to a new file
Move ALPM feature related code as it will be used for
non-psr panel also thorugh LOBF feature.
v1: Initial version.
v2: Correct ordering in makefile. [Jani]
Signed-off-by: Animesh Manna
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_alpm.c | 292 ++
drivers/gpu/drm/i915/display/intel_alpm.h | 18 ++
drivers/gpu/drm/i915/display/intel_psr.c | 280 +
4 files changed, 314 insertions(+), 277 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.c
create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 7cad944b825c..9a3f910ce4fd 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -243,6 +243,7 @@ i915-y += \
display/hsw_ips.o \
display/i9xx_plane.o \
display/i9xx_wm.o \
+ display/intel_alpm.o \
display/intel_atomic.o \
display/intel_atomic_plane.o \
display/intel_audio.o \
diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c
b/drivers/gpu/drm/i915/display/intel_alpm.c
new file mode 100644
index ..13bac3e8c8fa
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2024, Intel Corporation.
+ */
+
+#include "intel_alpm.h"
+#include "intel_crtc.h"
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_dp.h"
+#include "intel_dp_aux.h"
+#include "intel_psr_regs.h"
+
+/*
+ * See Bspec: 71632 for the table
+ *
+ * Silence_period = tSilence,Min + ((tSilence,Max - tSilence,Min) / 2)
+ *
+ * Half cycle duration:
+ *
+ * Link rates 1.62 - 4.32 and tLFPS_Cycle = 70 ns
+ * FLOOR( (Link Rate * tLFPS_Cycle) / (2 * 10) )
+ *
+ * Link rates 5.4 - 8.1
+ * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ] = 10
+ * LFPS Period chosen is the mid-point of the min:max values from the table
+ * FLOOR( LFPS Period in Symbol clocks /
+ * (2 * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ]) )
+ */
+static bool _lnl_get_silence_period_and_lfps_half_cycle(int link_rate,
+ int *silence_period,
+ int *lfps_half_cycle)
+{
+ switch (link_rate) {
+ case 162000:
+ *silence_period = 20;
+ *lfps_half_cycle = 5;
+ break;
+ case 216000:
+ *silence_period = 27;
+ *lfps_half_cycle = 7;
+ break;
+ case 243000:
+ *silence_period = 31;
+ *lfps_half_cycle = 8;
+ break;
+ case 27:
+ *silence_period = 34;
+ *lfps_half_cycle = 9;
+ break;
+ case 324000:
+ *silence_period = 41;
+ *lfps_half_cycle = 11;
+ break;
+ case 432000:
+ *silence_period = 56;
+ *lfps_half_cycle = 15;
+ break;
+ case 54:
+ *silence_period = 69;
+ *lfps_half_cycle = 12;
+ break;
+ case 648000:
+ *silence_period = 84;
+ *lfps_half_cycle = 15;
+ break;
+ case 675000:
+ *silence_period = 87;
+ *lfps_half_cycle = 15;
+ break;
+ case 81:
+ *silence_period = 104;
+ *lfps_half_cycle = 19;
+ break;
+ default:
+ *silence_period = *lfps_half_cycle = -1;
+ return false;
+ }
+ return true;
+}
+
+/*
+ * AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+
+ * tSilence, Max+ tPHY Establishment + tCDS) / tline)
+ * For the "PHY P2 to P0" latency see the PHY Power Control page
+ * (PHY P2 to P0) : https://gfxspecs.intel.com/Predator/Home/Index/68965
+ * : 12 us
+ * The tLFPS_Period, Max term is 800ns
+ * The tSilence, Max term is 180ns
+ * The tPHY Establishment (a.k.a. t1) term is 50us
+ * The tCDS term is 1 or 2 times t2
+ * t2 = Number ML_PHY_LOCK * tML_PHY_LOCK
+ * Number ML_PHY_LOCK = ( 7 + CEILING( 6.5us / tML_PHY_LOCK ) + 1)
+ * Rounding up the 6.5us padding to the next ML_PHY_LOCK boundary and
+ * adding the "+ 1" term ensures all ML_PHY_LOCK sequences that start
+ * within the CDS period complete within the CDS period regardless of
+ * entry into the period
+ * tML_PHY_LOCK = TPS4 Length * ( 10 / (Link Rate in MHz) )
+ * TPS4 Length = 252 Symbols
+ */
+static int _lnl_compute_aux_less_wake_time(int port_clock)
+{
+ int tphy2_p2_to_p0 = 12 * 1000;
+ int tlfps_period_max = 800;
+ int tsilence_max = 180;
+ int t1 = 50 * 1000;
+ int tps4 = 252;
+ int tml_phy_lock = 1000 * 1000 * tps4 * 10 / port_clock;
+ int num_ml_phy_lock = 7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1;
+ int t2 = num_ml_phy_lock * tml_phy_lock;
+ int tcds = 1 * t2;
