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drm/i915/dsi: Use unconditional msleep() instead of intel_dsi_msleep()

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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 6fdb335f1c ("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@vger.kernel.org
Fixes: 6fdb335f1c ("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@redhat.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230425194441.68086-1-hdegoede@redhat.com
(cherry picked from commit fa83c12132)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Hans de Goede 2023-04-25 21:44:41 +02:00 committed by Joonas Lahtinen
parent 6ece90e366
commit c8c2969bfc
4 changed files with 6 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/display/icl_dsi.c
View File

@ -1140,7 +1140,7 @@ static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)
/* 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);

11
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
View File

@ -763,17 +763,6 @@ void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
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);

1
drivers/gpu/drm/i915/display/intel_dsi_vbt.h
View File

@ -16,7 +16,6 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on);
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__ */

22
drivers/gpu/drm/i915/display/vlv_dsi.c
View File

@ -737,7 +737,6 @@ static void intel_dsi_pre_enable(struct intel_atomic_state *state,
{
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;
@ -779,21 +778,10 @@ static void intel_dsi_pre_enable(struct intel_atomic_state *state,
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);
@ -827,7 +815,7 @@ static void intel_dsi_pre_enable(struct intel_atomic_state *state,
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);
@ -949,7 +937,7 @@ static void intel_dsi_post_disable(struct intel_atomic_state *state,
/* 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();