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Message-Id: <20130929192647.302582873@linuxfoundation.org> Date: Sun, 29 Sep 2013 12:28:07 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com> Subject: [ 55/71] drm/radeon/dpm/rs780: dont enable sclk scaling if not required 3.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@....com> commit e40210cca98068835acd5a4fe760bf96b3a1aa48 upstream. If the low and high sclks are the same, there is no need to enable sclk scaling. This causes display stability issues on certain boards. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=60857 Signed-off-by: Alex Deucher <alexander.deucher@....com> Reviewed-by: Christian König <christian.koenig@....com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/gpu/drm/radeon/rs780_dpm.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/gpu/drm/radeon/rs780_dpm.c +++ b/drivers/gpu/drm/radeon/rs780_dpm.c @@ -486,6 +486,9 @@ static void rs780_activate_engine_clk_sc (new_state->sclk_low == old_state->sclk_low)) return; + if (new_state->sclk_high == new_state->sclk_low) + return; + rs780_clk_scaling_enable(rdev, true); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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