Add missing patch
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Jan Alexander Steffens
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0002-Revert-drm-i915-edp-Allow-alternate-fixed-mode-for-e.patch
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242
0002-Revert-drm-i915-edp-Allow-alternate-fixed-mode-for-e.patch
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From 997fbfe5508bc7d29fdf0a7a103f3864d4db380a Mon Sep 17 00:00:00 2001
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Message-Id: <997fbfe5508bc7d29fdf0a7a103f3864d4db380a.1528140572.git.jan.steffens@gmail.com>
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In-Reply-To: <b7e3d341f20581dcd72d3640fa8f6f99fd766d21.1528140572.git.jan.steffens@gmail.com>
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References: <b7e3d341f20581dcd72d3640fa8f6f99fd766d21.1528140572.git.jan.steffens@gmail.com>
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From: Jani Nikula <jani.nikula@intel.com>
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Date: Wed, 16 May 2018 11:01:10 +0300
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Subject: [PATCH 2/2] Revert "drm/i915/edp: Allow alternate fixed mode for eDP
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if available."
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This reverts commit dc911f5bd8aacfcf8aabd5c26c88e04c837a938e.
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Per the report, no matter what display mode you select with xrandr, the
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i915 driver will always select the alternate fixed mode. For the
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reporter this means that the display will always run at 40Hz which is
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quite annoying. This may be due to the mode comparison.
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But there are some other potential issues. The choice of alt_fixed_mode
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seems dubious. It's the first non-preferred mode, but there are no
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guarantees that the only difference would be refresh rate. Similarly,
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there may be more than one preferred mode in the probed modes list, and
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the commit changes the preferred mode selection to choose the last one
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on the list instead of the first.
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(Note that the probed modes list is the raw, unfiltered, unsorted list
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of modes from drm_add_edid_modes(), not the pretty result after a
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drm_helper_probe_single_connector_modes() call.)
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Finally, we already have eerily similar code in place to find the
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downclock mode for DRRS that seems like could be reused here.
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Back to the drawing board.
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Note: This is a hand-crafted revert due to conflicts. If it fails to
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backport, please just try reverting the original commit directly.
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Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105469
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Reported-by: Rune Petersen <rune@megahurts.dk>
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Reported-by: Mark Spencer <n7u4722r35@ynzlx.anonbox.net>
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Fixes: dc911f5bd8aa ("drm/i915/edp: Allow alternate fixed mode for eDP if available.")
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Cc: Clint Taylor <clinton.a.taylor@intel.com>
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Cc: David Weinehall <david.weinehall@linux.intel.com>
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Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
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Cc: Jani Nikula <jani.nikula@intel.com>
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Cc: Chris Wilson <chris@chris-wilson.co.uk>
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Cc: Jim Bride <jim.bride@linux.intel.com>
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Cc: Jani Nikula <jani.nikula@linux.intel.com>
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Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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Cc: intel-gfx@lists.freedesktop.org
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Cc: <stable@vger.kernel.org> # v4.14+
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Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
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Link: https://patchwork.freedesktop.org/patch/msgid/20180516080110.22770-1-jani.nikula@intel.com
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---
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drivers/gpu/drm/i915/intel_dp.c | 38 ++++--------------------------
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drivers/gpu/drm/i915/intel_drv.h | 2 --
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drivers/gpu/drm/i915/intel_dsi.c | 2 +-
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drivers/gpu/drm/i915/intel_dvo.c | 2 +-
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drivers/gpu/drm/i915/intel_lvds.c | 3 +--
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drivers/gpu/drm/i915/intel_panel.c | 6 -----
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6 files changed, 8 insertions(+), 45 deletions(-)
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diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
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index b7b4cfdeb974..48cb8df5ae97 100644
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--- a/drivers/gpu/drm/i915/intel_dp.c
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+++ b/drivers/gpu/drm/i915/intel_dp.c
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@@ -1671,23 +1671,6 @@ static int intel_dp_compute_bpp(struct intel_dp *intel_dp,
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return bpp;
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}
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-static bool intel_edp_compare_alt_mode(struct drm_display_mode *m1,
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- struct drm_display_mode *m2)
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-{
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- bool bres = false;
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-
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- if (m1 && m2)
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- bres = (m1->hdisplay == m2->hdisplay &&
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- m1->hsync_start == m2->hsync_start &&
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- m1->hsync_end == m2->hsync_end &&
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- m1->htotal == m2->htotal &&
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- m1->vdisplay == m2->vdisplay &&
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- m1->vsync_start == m2->vsync_start &&
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- m1->vsync_end == m2->vsync_end &&
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- m1->vtotal == m2->vtotal);
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- return bres;
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-}
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-
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bool
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intel_dp_compute_config(struct intel_encoder *encoder,
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struct intel_crtc_state *pipe_config,
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@@ -1734,16 +1717,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
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pipe_config->has_audio = intel_conn_state->force_audio == HDMI_AUDIO_ON;
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if (intel_dp_is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
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- struct drm_display_mode *panel_mode =
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- intel_connector->panel.alt_fixed_mode;
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- struct drm_display_mode *req_mode = &pipe_config->base.mode;
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-
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- if (!intel_edp_compare_alt_mode(req_mode, panel_mode))
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- panel_mode = intel_connector->panel.fixed_mode;
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-
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- drm_mode_debug_printmodeline(panel_mode);
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-
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- intel_fixed_panel_mode(panel_mode, adjusted_mode);
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+ intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
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+ adjusted_mode);
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if (INTEL_GEN(dev_priv) >= 9) {
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int ret;
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@@ -6121,7 +6096,6 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct drm_connector *connector = &intel_connector->base;
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struct drm_display_mode *fixed_mode = NULL;
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- struct drm_display_mode *alt_fixed_mode = NULL;
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struct drm_display_mode *downclock_mode = NULL;
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bool has_dpcd;
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struct drm_display_mode *scan;
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@@ -6176,14 +6150,13 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
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}
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intel_connector->edid = edid;
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- /* prefer fixed mode from EDID if available, save an alt mode also */
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+ /* prefer fixed mode from EDID if available */
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list_for_each_entry(scan, &connector->probed_modes, head) {
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if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
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fixed_mode = drm_mode_duplicate(dev, scan);
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downclock_mode = intel_dp_drrs_init(
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intel_connector, fixed_mode);
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- } else if (!alt_fixed_mode) {
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- alt_fixed_mode = drm_mode_duplicate(dev, scan);
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+ break;
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}
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}
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@@ -6220,8 +6193,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
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pipe_name(pipe));
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}
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- intel_panel_init(&intel_connector->panel, fixed_mode, alt_fixed_mode,
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- downclock_mode);
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+ intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
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intel_connector->panel.backlight.power = intel_edp_backlight_power;
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intel_panel_setup_backlight(connector, pipe);
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diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
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index a80fbad9be0f..7f3e83f17adb 100644
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--- a/drivers/gpu/drm/i915/intel_drv.h
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+++ b/drivers/gpu/drm/i915/intel_drv.h
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@@ -269,7 +269,6 @@ struct intel_encoder {
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struct intel_panel {
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struct drm_display_mode *fixed_mode;
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- struct drm_display_mode *alt_fixed_mode;
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struct drm_display_mode *downclock_mode;
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/* backlight */
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@@ -1820,7 +1819,6 @@ void intel_overlay_reset(struct drm_i915_private *dev_priv);
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/* intel_panel.c */
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int intel_panel_init(struct intel_panel *panel,
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struct drm_display_mode *fixed_mode,
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- struct drm_display_mode *alt_fixed_mode,
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struct drm_display_mode *downclock_mode);
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void intel_panel_fini(struct intel_panel *panel);
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void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
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diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
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index 51a1d6868b1e..cf39ca90d887 100644
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--- a/drivers/gpu/drm/i915/intel_dsi.c
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+++ b/drivers/gpu/drm/i915/intel_dsi.c
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@@ -1846,7 +1846,7 @@ void intel_dsi_init(struct drm_i915_private *dev_priv)
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connector->display_info.width_mm = fixed_mode->width_mm;
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connector->display_info.height_mm = fixed_mode->height_mm;
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- intel_panel_init(&intel_connector->panel, fixed_mode, NULL, NULL);
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+ intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
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intel_panel_setup_backlight(connector, INVALID_PIPE);
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intel_dsi_add_properties(intel_connector);
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diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
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index eb0c559b2715..a70d767313aa 100644
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--- a/drivers/gpu/drm/i915/intel_dvo.c
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+++ b/drivers/gpu/drm/i915/intel_dvo.c
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@@ -536,7 +536,7 @@ void intel_dvo_init(struct drm_i915_private *dev_priv)
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*/
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intel_panel_init(&intel_connector->panel,
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intel_dvo_get_current_mode(intel_encoder),
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- NULL, NULL);
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+ NULL);
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intel_dvo->panel_wants_dither = true;
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}
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diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
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index e125d16a1aa7..d278f24ba6ae 100644
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--- a/drivers/gpu/drm/i915/intel_lvds.c
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+++ b/drivers/gpu/drm/i915/intel_lvds.c
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@@ -1175,8 +1175,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
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out:
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mutex_unlock(&dev->mode_config.mutex);
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- intel_panel_init(&intel_connector->panel, fixed_mode, NULL,
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- downclock_mode);
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+ intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
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intel_panel_setup_backlight(connector, INVALID_PIPE);
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lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
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diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
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index 41d00b1603e3..b443278e569c 100644
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--- a/drivers/gpu/drm/i915/intel_panel.c
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+++ b/drivers/gpu/drm/i915/intel_panel.c
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@@ -1928,30 +1928,24 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
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int intel_panel_init(struct intel_panel *panel,
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struct drm_display_mode *fixed_mode,
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- struct drm_display_mode *alt_fixed_mode,
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struct drm_display_mode *downclock_mode)
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{
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intel_panel_init_backlight_funcs(panel);
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panel->fixed_mode = fixed_mode;
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- panel->alt_fixed_mode = alt_fixed_mode;
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panel->downclock_mode = downclock_mode;
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return 0;
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}
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void intel_panel_fini(struct intel_panel *panel)
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{
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struct intel_connector *intel_connector =
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container_of(panel, struct intel_connector, panel);
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if (panel->fixed_mode)
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drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
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- if (panel->alt_fixed_mode)
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- drm_mode_destroy(intel_connector->base.dev,
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- panel->alt_fixed_mode);
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-
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if (panel->downclock_mode)
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drm_mode_destroy(intel_connector->base.dev,
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panel->downclock_mode);
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--
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2.17.1
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