This is a note to let you know that I've just added the patch titled
drm/i915/dsi: Use unconditional msleep() instead of intel_dsi_msleep()
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-dsi-use-unconditional-msleep-instead-of-intel_dsi_msleep.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c8c2969bfcba5fcba3a5b078315c1b586d927d9f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Tue, 25 Apr 2023 21:44:41 +0200
Subject: drm/i915/dsi: Use unconditional msleep() instead of intel_dsi_msleep()
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From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit c8c2969bfcba5fcba3a5b078315c1b586d927d9f upstream.
The intel_dsi_msleep() helper skips sleeping if the MIPI-sequences have
a version of 3 or newer and the panel is in vid-mode.
This is based on the big comment around line 730 which starts with
"Panel enable/disable sequences from the VBT spec.", where
the "v3 video mode seq" column does not have any wait t# entries.
Checking the Windows driver shows that it does always honor
the VBT delays independent of the version of the VBT sequences.
Commit 6fdb335f1c9c ("drm/i915/dsi: Use unconditional msleep for
the panel_on_delay when there is no reset-deassert MIPI-sequence")
switched to a direct msleep() instead of intel_dsi_msleep()
when there is no MIPI_SEQ_DEASSERT_RESET sequence, to fix
the panel on an Acer Aspire Switch 10 E SW3-016 not turning on.
And now testing on a Nextbook Ares 8A shows that panel_on_delay
must always be honored otherwise the panel will not turn on.
Instead of only always using regular msleep() for panel_on_delay
do as Windows does and always use regular msleep() everywhere
were intel_dsi_msleep() is used and drop the intel_dsi_msleep()
helper.
Changes in v2:
- Replace all intel_dsi_msleep() calls instead of just
the intel_dsi_msleep(panel_on_delay) call
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 6fdb335f1c9c ("drm/i915/dsi: Use unconditional msleep for the panel_on_delay when there is no reset-deassert MIPI-sequence")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230425194441.68086-1-hdegoede@xxxxxxxxxx
(cherry picked from commit fa83c12132f71302f7d4b02758dc0d46048d3f5f)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 2 +-
drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 11 -----------
drivers/gpu/drm/i915/display/intel_dsi_vbt.h | 1 -
drivers/gpu/drm/i915/display/vlv_dsi.c | 22 +++++-----------------
4 files changed, 6 insertions(+), 30 deletions(-)
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1211,7 +1211,7 @@ static void gen11_dsi_powerup_panel(stru
/* panel power on related mipi dsi vbt sequences */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
- intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay);
+ msleep(intel_dsi->panel_on_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -762,17 +762,6 @@ void intel_dsi_vbt_exec_sequence(struct
gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 0);
}
-void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
-{
- struct intel_connector *connector = intel_dsi->attached_connector;
-
- /* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
- if (is_vid_mode(intel_dsi) && connector->panel.vbt.dsi.seq_version >= 3)
- return;
-
- msleep(msec);
-}
-
void intel_dsi_log_params(struct intel_dsi *intel_dsi)
{
struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev);
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.h
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.h
@@ -16,7 +16,6 @@ void intel_dsi_vbt_gpio_init(struct inte
void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi);
void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
enum mipi_seq seq_id);
-void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec);
void intel_dsi_log_params(struct intel_dsi *intel_dsi);
#endif /* __INTEL_DSI_VBT_H__ */
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -783,7 +783,6 @@ static void intel_dsi_pre_enable(struct
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
- struct intel_connector *connector = to_intel_connector(conn_state->connector);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
enum pipe pipe = crtc->pipe;
enum port port;
@@ -831,21 +830,10 @@ static void intel_dsi_pre_enable(struct
if (!IS_GEMINILAKE(dev_priv))
intel_dsi_prepare(encoder, pipe_config);
+ /* Give the panel time to power-on and then deassert its reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
-
- /*
- * Give the panel time to power-on and then deassert its reset.
- * Depending on the VBT MIPI sequences version the deassert-seq
- * may contain the necessary delay, intel_dsi_msleep() will skip
- * the delay in that case. If there is no deassert-seq, then an
- * unconditional msleep is used to give the panel time to power-on.
- */
- if (connector->panel.vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET]) {
- intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay);
- intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
- } else {
- msleep(intel_dsi->panel_on_delay);
- }
+ msleep(intel_dsi->panel_on_delay);
+ intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
if (IS_GEMINILAKE(dev_priv)) {
glk_cold_boot = glk_dsi_enable_io(encoder);
@@ -879,7 +867,7 @@ static void intel_dsi_pre_enable(struct
msleep(20); /* XXX */
for_each_dsi_port(port, intel_dsi->ports)
dpi_send_cmd(intel_dsi, TURN_ON, false, port);
- intel_dsi_msleep(intel_dsi, 100);
+ msleep(100);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
@@ -1007,7 +995,7 @@ static void intel_dsi_post_disable(struc
/* Assert reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
- intel_dsi_msleep(intel_dsi, intel_dsi->panel_off_delay);
+ msleep(intel_dsi->panel_off_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
intel_dsi->panel_power_off_time = ktime_get_boottime();
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-6.2/platform-x86-intel-uncore-freq-return-error-on-write-frequency.patch
queue-6.2/platform-x86-touchscreen_dmi-add-upside-down-quirk-for-gdix1002-ts-on-the-juno-tablet.patch
queue-6.2/platform-x86-touchscreen_dmi-add-info-for-the-dexp-ursus-kx210i.patch
queue-6.2/platform-x86-thinkpad_acpi-add-profile-force-ability.patch
queue-6.2/drm-i915-dsi-use-unconditional-msleep-instead-of-intel_dsi_msleep.patch
queue-6.2/asoc-intel-soc-acpi-byt-fix-wm510205-match-no-longer.patch
queue-6.2/platform-x86-thinkpad_acpi-fix-platform-profiles-on-t490.patch
queue-6.2/platform-x86-hp-wmi-add-micmute-to-hp_wmi_keymap-struct.patch
